//! `hivectl` — operator-facing host CLI for hyperhive.
//!
//! Sibling binary to the `hive-c0re` daemon. Where `hive-c0re`'s
//! subcommands focus on the broker / approval / topology surface
//! (`spawn`, `kill`, `rebuild`, `approve` …), `hivectl` covers
//! host-side administration — both manual provisioning operations
//! that work without the daemon running (forge, matrix, gateway) AND
//! daemon-assisted agent management (agents restart/restart-all) that
//! goes through the host admin socket.
//!
//! Verbs read configuration off the same on-disk paths c0re uses
//! (`/var/lib/hyperhive/forge-core-token`,
//! `/var/lib/hyperhive/matrix-register-token`, per-agent state
//! dirs) and reuse the `forge` / `matrix` modules from the
//! `hive-c0re` lib — single source of truth, no duplication.

#[cfg(unix)]
use std::os::unix::process::CommandExt as _;
use std::path::{Path, PathBuf};

use anyhow::{Context as _, Result, bail};
use clap::{Args, Parser, Subcommand};
use hive_c0re::coordinator::Coordinator;

#[derive(Parser)]
#[command(
    name = "hivectl",
    about = "hyperhive host CLI — operator-facing administration",
    long_about = "\
Sibling to the `hive-c0re` daemon binary. Covers host-side admin \
operations that don't go through the broker — manual user \
provisioning on the bundled forge + matrix containers, plus future \
recovery / debugging verbs.\
"
)]
struct Cli {
    /// Path to the hive-c0re host admin socket, used by the daemon-assisted
    /// verbs (`agents`, `stop`, `start`). Global: accepted before or after
    /// the subcommand. Verbs that don't talk to the daemon ignore it.
    #[arg(long, global = true, default_value = DEFAULT_HOST_SOCKET)]
    socket: PathBuf,
    #[command(subcommand)]
    cmd: Cmd,
}

#[derive(Subcommand)]
enum Cmd {
    /// Forgejo user provisioning. Manual entry point to the same
    /// idempotent flow c0re runs automatically at boot
    /// (`forge::ensure_all`) — useful for recovery, ad-hoc reprovisioning,
    /// or single-agent fixes without bouncing the daemon.
    Forge {
        #[command(subcommand)]
        cmd: ForgeCmd,
    },
    /// matrix-tuwunel user provisioning. Manual entry point to the same
    /// idempotent flow c0re runs automatically at boot
    /// (`matrix::ensure_all`) — useful when the boot-time sweep skipped
    /// an agent (e.g. matrix container wasn't up yet) or to re-register
    /// after wiping a token file.
    Matrix {
        #[command(subcommand)]
        cmd: MatrixCmd,
    },
    /// Gateway htpasswd user management. Add, remove, or list users in
    /// an htpasswd file used by the gateway's HTTP Basic auth
    /// (`services.hyperhive.gateway.auth`). Credentials are stored as
    /// `BCrypt` hashes — no extra service or PAM required.
    Gateway {
        #[command(subcommand)]
        cmd: GatewayCmd,
    },
    /// Agent container management. Requires the hive-c0re daemon to be
    /// running (connects to the host admin socket).
    Agents {
        #[command(subcommand)]
        cmd: AgentsCmd,
    },
    /// WireGuard inter-hive mesh setup helpers (`services.hyperhive.swarm`).
    ///
    /// One-time-setup convenience so nobody has to remember the `wg` dance:
    /// `wg init` generates + stores this hive's private key and prints the
    /// public key plus the nix snippet to enable the mesh; `wg peer` prints
    /// the snippet to add a remote hive; `wg status` wraps `wg show`. The
    /// verbs own the imperative state (the key file); the printed nix goes
    /// into the operator's host config (kept in git), so nothing here mutates
    /// declarative config behind the operator's back.
    Wg {
        #[command(subcommand)]
        cmd: WgCmd,
    },
    /// Generate the federation peer-config block for THIS hive — the nix
    /// a peer operator pastes into their `services.hyperhive.swarm.peers`
    /// to trust + reach this hive. Emits `caCert` (+ a `cp` line for the
    /// cert) when this hive serves a self-signed CA, the WireGuard public
    /// key when the mesh key exists, and the `wireguard{Address,Endpoint}`
    /// you pass. The hive's own domain is filled in automatically from the
    /// running daemon (`services.hyperhive.domain`). Reads local state (the
    /// TLS CA cert, the wg key); never mutates. `wg init` calls this at the
    /// end, so a fresh mesh setup prints the hand-over block too.
    PeerConfig {
        /// This hive's WireGuard mesh address (e.g. `10.42.0.1/32`),
        /// emitted as `wireguardAddress`. Omit when not running the mesh.
        #[arg(long)]
        wg_address: Option<String>,
        /// This hive's public WireGuard endpoint (`host:port`), emitted as
        /// `wireguardEndpoint`. Omit when peers dial in / no mesh.
        #[arg(long)]
        wg_endpoint: Option<String>,
    },
    /// Open an interactive Claude session inside an agent container.
    ///
    /// Runs claude as the agent user from its state dir with the harness's
    /// settings / MCP / system prompt. Bare `choom <name>` is a fresh
    /// session; `--resume <session-id>` rejoins a prior one. Never
    /// collides with the harness's live session. Requires root + a running
    /// container. See `docs/tools/hivectl.md` (Choom) for details.
    Choom {
        /// Agent name (e.g. `damocles`, `iris`).
        name: String,
        /// Resume a prior claude session by its session id, passed
        /// through as `claude --resume <value>` (claude's `--continue`
        /// takes no value — it resumes the cwd's latest session, which
        /// is the harness's, so choom never uses it; this flag matches
        /// the claude flag it maps to). Omit for a fresh blank session.
        /// A value is required when the flag is given.
        #[arg(long = "resume", value_name = "SESSION")]
        resume_session: Option<String>,
    },
    /// Stop containers hive-wide in one operator action. Bare `hivectl
    /// stop` stops **everything** — all sub-agents plus the ci, forge,
    /// gateway, and matrix infra containers. Narrow it with scope flags:
    /// `--agents` (all sub-agents), `--ci` / `--forge` / `--gateway` /
    /// `--matrix` (named infra), and `--agent <name>` (repeatable) for
    /// specific sub-agents. Flags are additive (e.g. `--agents --matrix`).
    /// Requires the hive-c0re daemon (connects to the host admin socket).
    /// hive-c0re itself is never stopped — it services the request.
    Stop {
        #[command(flatten)]
        scope: ScopeArgs,
        /// Gracefully quiesce each agent before stopping, instead of a
        /// hard stop. Each agent gets a graceful-stop DAG on the job
        /// queue: the harness is signalled, runs one stop-checkpoint
        /// turn to flush durable `/state`, drains, then the container
        /// is stopped (bounded by a 3-min timeout that falls back to a
        /// hard stop). All drains overlap. Applies to agents only.
        #[arg(long)]
        graceful: bool,
        /// Return immediately after the stop DAGs are queued instead of
        /// waiting for them with live per-node progress.
        #[arg(long)]
        no_wait: bool,
    },
    /// Start containers hive-wide — the inverse of `hivectl stop`. Bare
    /// `hivectl start` restores the previously-running agents from the
    /// last broad-scope `stop`, or starts everything if no prior stop
    /// exists; the same scope flags as `stop` narrow it (`--agents`,
    /// `--ci`, `--forge`, `--gateway`, `--matrix`, `--agent <name>`). A
    /// targeted `--agent <name>` start is never filtered. Requires the
    /// hive-c0re daemon.
    Start {
        #[command(flatten)]
        scope: ScopeArgs,
        /// Return immediately after the start DAGs are queued instead
        /// of waiting for them with live per-node progress.
        #[arg(long)]
        no_wait: bool,
    },
    /// Restart containers hive-wide — `stop` then `start` over the same
    /// scope. Bare `hivectl restart` restarts **everything** (all sub-agents
    /// plus the ci/forge/gateway/matrix infra containers); the same scope
    /// flags as `stop`/`start` narrow it (`--agents`, `--ci`, `--forge`,
    /// `--gateway`, `--matrix`, `--agent <name>`). If the stop phase reports
    /// a failure the start phase is skipped so the operator can investigate.
    /// Requires the hive-c0re daemon.
    Restart {
        #[command(flatten)]
        scope: ScopeArgs,
        /// Gracefully quiesce each agent on the stop half (see
        /// `stop --graceful`). Applies to agents only.
        #[arg(long)]
        graceful: bool,
    },
    /// Per-agent disk accounting + optional quotas via btrfs qgroups.
    ///
    /// Opt-in: `quota enable` turns on btrfs qgroup accounting for the
    /// agent-state filesystem (a one-time, I/O-heavy rescan — that's why
    /// it isn't automatic). Then `quota show` reports per-agent usage and
    /// `quota limit` caps an agent. No-op on non-btrfs hosts. Operates on
    /// agent state subvolumes (created by the btrfs-subvolume migration);
    /// agents still on a plain dir report no qgroup usage.
    Quota {
        #[command(subcommand)]
        cmd: QuotaCmd,
    },
    /// btrfs subvolume management for agent state dirs.
    ///
    /// New agents get a btrfs subvolume state root automatically (when the
    /// host FS is btrfs); agents that predate that are left on plain dirs.
    /// `subvol upgrade <agent>` opts an existing plain-dir agent into the
    /// subvolume feature set (snapshots, per-subvol usage/quota, migration)
    /// by migrating its state dir in place. Requires the hive-c0re daemon
    /// (for the stop/start) and root (for the privileged migration).
    Subvol {
        #[command(subcommand)]
        cmd: SubvolCmd,
    },
    /// Print (and best-effort open in a browser) a hive web surface URL.
    ///
    /// Resolves the URL from the running daemon (`HostRequest::Urls`), so
    /// custom forge / matrix domains work without guessing `forge.<domain>`.
    /// Prints the URL unconditionally — the reliable core, since the host
    /// is usually headless / driven over SSH where `xdg-open` is a no-op —
    /// then tries `xdg-open` as a convenience. Bare `hivectl open` opens the
    /// operator dashboard.
    Open {
        /// Which surface to open. Defaults to the operator dashboard.
        #[arg(value_enum, default_value_t = OpenTarget::Home)]
        target: OpenTarget,
    },
    /// Emit the full CLI reference as `CommonMark` to stdout.
    ///
    /// Hidden tooling command (not part of day-to-day operator admin):
    /// walks this binary's own clap command tree and renders every verb,
    /// flag, and help string as markdown. Used by the docs build to keep
    /// the published `hivectl` reference in lockstep with the code — no
    /// hand-maintained command list to drift out of date.
    #[command(hide = true)]
    MarkdownDocs,
    /// Generate a shell completion script for `hivectl` and print it to
    /// stdout.
    ///
    /// Pipe it into your shell's completion path — e.g. for zsh:
    /// `hivectl completions zsh > ~/.zsh/completions/_hivectl` (with that
    /// dir on `$fpath`). The hyperhive NixOS module installs the zsh script
    /// system-wide automatically, so this is mainly for ad-hoc / other-shell
    /// use. Supports bash, zsh, fish, elvish, and powershell.
    Completions {
        /// Shell to emit completions for.
        shell: clap_complete::Shell,
    },
}

/// Which hive web surface `hivectl open` targets.
#[derive(Copy, Clone, Debug, clap::ValueEnum)]
enum OpenTarget {
    /// The operator dashboard (`https://<domain>/`).
    Home,
    /// The forge (Forgejo) web UI.
    Forge,
    /// The matrix GUI (fluffychat).
    Matrix,
}

/// Shared scope flags for `hivectl stop` / `hivectl start`. With no flag
/// set the verb targets **everything** (all sub-agents + every controllable
/// infra container). Setting any flag restricts to the selected classes,
/// additively.
// One bool per selectable container class, each mapping 1:1 to a clap flag;
// orthogonal toggles, not a state machine — hence the bools allow (mirrors
// `hive_sh4re::LifecycleScope`).
#[allow(clippy::struct_excessive_bools)]
#[derive(Args)]
struct ScopeArgs {
    /// All sub-agent containers.
    #[arg(long)]
    agents: bool,
    /// A specific sub-agent by name. Repeatable: `--agent a --agent b`.
    #[arg(long = "agent", value_name = "NAME")]
    agent: Vec<String>,
    /// The CI runner container (`hive-ci`).
    #[arg(long)]
    ci: bool,
    /// The forge container (`hive-forge`).
    #[arg(long)]
    forge: bool,
    /// The gateway container (`hive-gateway`).
    #[arg(long)]
    gateway: bool,
    /// The matrix container (`hive-matrix`).
    #[arg(long)]
    matrix: bool,
}

impl ScopeArgs {
    fn to_scope(&self) -> hive_sh4re::LifecycleScope {
        hive_sh4re::LifecycleScope {
            agents: self.agents,
            agent_names: self.agent.clone(),
            ci: self.ci,
            forge: self.forge,
            gateway: self.gateway,
            matrix: self.matrix,
        }
    }
}

#[derive(Subcommand)]
enum ForgeCmd {
    /// Create or refresh the Forgejo account + token for `<name>`.
    ///
    /// When `<name>` matches an existing agent (i.e. it has a state
    /// dir under `/var/lib/hyperhive/agents/`), persists the token to
    /// `<state>/forge-token` (idempotent: re-mints + rewrites every
    /// call so the on-disk scope matches the current
    /// `forge::TOKEN_SCOPES`).
    ///
    /// When `<name>` is **not** an agent (a human or any other
    /// non-container account), creates the forgejo user and prints the
    /// freshly-minted token to stdout — no `/var/lib/hyperhive/agents/`
    /// directory is created for the user.
    ///
    /// Without `--password` / `--password-stdin` a random throwaway is
    /// used (fine for agents — they auth by token via tea / hive-forge).
    /// Set a password to log into the forge web UI afterwards.
    /// `--password` is idempotent: re-running with the same value sets
    /// the same password (covers password resets on already-created
    /// accounts since `forgejo admin user create` silently no-ops once
    /// the user exists).
    CreateUser {
        /// Forgejo username. For agents: the container/agent name
        /// (`<n>` in `h-<n>`; manager uses the literal `manager`).
        /// For humans: any forgejo username — `mara`, `damocles`, etc.
        name: String,
        /// Set the account password to this string instead of a random
        /// throwaway. Use this for operator accounts that need to log
        /// into the forge web UI. Mutually exclusive with
        /// `--password-stdin`. WARNING: the password is visible in
        /// shell history + process listings; prefer `--password-stdin`
        /// for anything sensitive.
        #[arg(long)]
        password: Option<String>,
        /// Read the password from stdin (single line, trailing newline
        /// stripped) instead of an inline flag. Mutually exclusive with
        /// `--password`.
        #[arg(long, conflicts_with = "password")]
        password_stdin: bool,
    },
}

#[derive(Subcommand)]
enum MatrixCmd {
    /// Create or refresh the matrix account + access token for `<name>`.
    ///
    /// When `<name>` matches an existing agent (i.e. it has a state
    /// dir under `/var/lib/hyperhive/agents/`), persists the token to
    /// `<state>/matrix-token`. Skips registration when the file is
    /// already populated; delete it to force re-registration.
    ///
    /// When `<name>` is **not** an agent (a human or any other
    /// non-container account), registers the matrix user and prints
    /// the freshly-minted access token to stdout — no
    /// `/var/lib/hyperhive/agents/` directory is created for the user.
    ///
    /// Without `--password` / `--password-stdin` a random throwaway is
    /// used (fine for agents — they auth by `access_token`, never by
    /// password). Set a password to log into a matrix web client
    /// afterwards.
    CreateUser {
        /// Matrix localpart. For agents: the container/agent name.
        /// For humans: any matrix localpart — `mara`, `damocles`, etc.
        name: String,
        /// Set the account password to this string instead of a random
        /// throwaway. Use this for operator accounts that need to log
        /// into matrix web clients via `m.login.password`. Mutually
        /// exclusive with `--password-stdin`. WARNING: the
        /// password is visible in shell history + process listings;
        /// prefer `--password-stdin` for anything sensitive.
        #[arg(long)]
        password: Option<String>,
        /// Read the password from stdin (single line, trailing newline
        /// stripped) instead of an inline flag. Mutually exclusive with
        /// `--password`.
        #[arg(long, conflicts_with = "password")]
        password_stdin: bool,
    },
    /// Provision (or re-provision) the hive system admin matrix account
    /// (`@hive:<server>`). hive-c0re runs this automatically on startup
    /// before the agent sweep so the account is the first registered
    /// user — Conduit/tuwunel grants admin rights to the first user.
    /// Run manually to recover a missing admin token file.
    SyncAdmin,
    /// Promote a matrix user to homeserver admin via the admin API.
    /// Uses the hive system admin token at
    /// `/var/lib/hyperhive/matrix/admin-token`. The `server_name` is
    /// discovered automatically from the running homeserver.
    PromoteUser {
        /// Matrix localpart of the user to promote (e.g. `argus`).
        name: String,
    },
    /// Reset a matrix user's password via the admin API and persist the
    /// new password to `/var/lib/hyperhive/matrix/creds/<name>-password`
    /// so the next `ensure_user_for` (or `create-user`) can re-login.
    ///
    /// After this command succeeds, run `hivectl matrix create-user
    /// <name>` to mint a fresh access token for the agent.
    ResetPassword {
        /// Matrix localpart of the account to reset (e.g. `argus`).
        name: String,
    },
    /// Invite a matrix user to the hive Space (default) or a specific
    /// room. Uses the hive admin token; the admin account must be a
    /// member of the target room with invite power (it owns the hive
    /// Space). Idempotent — already-member / already-invited is a no-op.
    Invite {
        /// User to invite: a full id (`@mara:server`) or a bare
        /// localpart (qualified with the homeserver's `server_name`).
        user: String,
        /// Target room id (`!abc:server`) or alias (`#name:server`).
        /// Omit to invite to the hive Space.
        #[arg(long)]
        room: Option<String>,
    },
}

/// Default htpasswd file path — the host-side location of the gateway's
/// credential store, pre-created by a tmpfiles rule when
/// `services.hyperhive.gateway.auth.enable = true`.
const DEFAULT_HTPASSWD_FILE: &str = "/var/lib/hyperhive/gateway/gateway.htpasswd";

#[derive(Subcommand)]
enum GatewayCmd {
    /// Add a new user or update the password of an existing user in the
    /// gateway htpasswd file. The password is hashed with `BCrypt` (cost 12).
    ///
    /// Pass `--password-stdin` when scripting or when you don't want the
    /// password visible in shell history. The file is created if it does
    /// not exist; its parent directory must already exist.
    CreateUser {
        /// Username to add or update.
        username: String,
        /// Set the password inline. WARNING: visible in shell history and
        /// process listings — prefer `--password-stdin` for sensitive input.
        /// Mutually exclusive with `--password-stdin`.
        #[arg(long, conflicts_with = "password_stdin")]
        password: Option<String>,
        /// Read the password from stdin (single line, trailing newline
        /// stripped). Mutually exclusive with `--password`.
        #[arg(long)]
        password_stdin: bool,
        /// Path to the htpasswd file. Defaults to the standard gateway
        /// credential store at `/var/lib/hyperhive/gateway/gateway.htpasswd`.
        #[arg(long, short = 'f', default_value = DEFAULT_HTPASSWD_FILE)]
        file: PathBuf,
    },
    /// Remove a user from the gateway htpasswd file. Exits with an error
    /// when the user is not found so callers can detect the no-op case.
    DeleteUser {
        /// Username to remove.
        username: String,
        /// Path to the htpasswd file. Defaults to the standard gateway
        /// credential store.
        #[arg(long, short = 'f', default_value = DEFAULT_HTPASSWD_FILE)]
        file: PathBuf,
    },
    /// List all usernames in the gateway htpasswd file, one per line.
    ListUsers {
        /// Path to the htpasswd file. Defaults to the standard gateway
        /// credential store.
        #[arg(long, short = 'f', default_value = DEFAULT_HTPASSWD_FILE)]
        file: PathBuf,
    },
}

#[derive(Subcommand)]
enum WgCmd {
    /// Generate (if absent) this hive's WireGuard private key, print its
    /// public key, and print the nix snippet to enable the mesh. Idempotent:
    /// an existing key is reused, never clobbered (clobbering would break a
    /// live mesh). Share the printed public key with peer hives.
    Init {
        /// This hive's mesh address (e.g. `10.42.0.1/32`) to bake into the
        /// printed snippet. Omit to get a placeholder you fill in.
        #[arg(long)]
        address: Option<String>,
    },
    /// Print the nix snippet to add a peer hive to the mesh. Pure output —
    /// paste it into this hive's config. Get `<pubkey>` from the peer's
    /// `hivectl wg init`.
    Peer {
        /// Peer hive's DNS domain (the `swarm.peers` attrset key).
        domain: String,
        /// Peer's WireGuard public key (from its `hivectl wg init`).
        #[arg(long)]
        pubkey: String,
        /// Peer's mesh address (e.g. `10.42.0.2/32`).
        #[arg(long)]
        address: String,
        /// Peer's `host:port` endpoint (omit for a peer that only dials out,
        /// e.g. one behind NAT — it must set an endpoint pointing back here).
        #[arg(long)]
        endpoint: Option<String>,
    },
    /// Show the live mesh interface state (`wg show wg-hive`). Requires the
    /// mesh to be enabled + up.
    Status,
}

#[derive(Subcommand)]
enum QuotaCmd {
    /// Enable btrfs qgroup accounting on the agent-state filesystem. Run
    /// once before `show` / `limit`. Triggers a full btrfs rescan (I/O
    /// heavy on a large filesystem), so it's a deliberate opt-in.
    /// Idempotent; a no-op on non-btrfs hosts.
    Enable,
    /// Report per-agent disk usage (referenced + exclusive bytes) from
    /// btrfs qgroups. With no name, shows every agent that has a state
    /// subvolume; pass a name to show just that one. Requires `enable`
    /// first.
    Show {
        /// Agent to show (omit for all agents with a state subvolume).
        name: Option<String>,
    },
    /// Set or clear an agent's disk quota (a referenced-usage cap). `size`
    /// accepts a byte count or a `K`/`M`/`G`/`T` suffix (e.g. `5G`), or
    /// `none` to clear the limit. Requires `enable` first.
    Limit {
        /// Agent whose state subvolume to limit.
        name: String,
        /// Size cap (`5G`, `500M`, `1073741824`) or `none` to clear.
        size: String,
    },
}

/// Default host admin socket path. Must match `hive-c0re`'s default in
/// `main.rs` (`/run/hyperhive/host.sock`) — the daemon binds there and
/// `hivectl agents` connects to it.
const DEFAULT_HOST_SOCKET: &str = "/run/hyperhive/host.sock";

#[derive(Subcommand)]
enum AgentsCmd {
    /// Show all managed agents with their status (running / needs-login /
    /// needs-update) and technical state (deployed sha, parent, pending
    /// reminders). The host roster overview; reuses the dashboard's
    /// per-agent aggregation. Requires the daemon running.
    List {
        /// Emit the raw JSON rows instead of the padded table (for
        /// scripting). The table is the default human-readable shape.
        #[arg(long)]
        json: bool,
    },
    /// Stop and start a single agent container without rebuilding config.
    /// Useful for "kick the container" when the process is stuck or the
    /// container needs a clean restart without changing the NixOS config.
    /// Rides the job queue (serialized against in-flight rebuilds for
    /// the same agent); waits with live progress unless `--no-wait`.
    Restart {
        /// Agent name (e.g. `damocles`, `ruth`).
        name: String,
        /// Return immediately after the restart DAG is queued.
        #[arg(long)]
        no_wait: bool,
    },
    /// Restart ALL managed agent containers via one restart DAG each —
    /// unrelated agents overlap, each serializes on its own lease.
    /// Waits for the whole set with live progress unless `--no-wait`.
    RestartAll {
        /// Return immediately after the restart DAGs are queued.
        #[arg(long)]
        no_wait: bool,
    },
}

#[derive(Subcommand)]
enum SubvolCmd {
    /// Convert an existing plain-dir agent state root into a btrfs subvolume
    /// in place. Stops the agent (so its state bind-mount is released),
    /// migrates `…/agents/<name>/` to a subvolume preserving
    /// ownership/permissions/xattrs, then restarts it. Idempotent (no-op if
    /// already a subvolume) and safe (the original dir is left untouched on
    /// any failure before the final swap). Requires `--yes` since it bounces
    /// the agent and moves its state.
    Upgrade {
        /// Agent name (e.g. `damocles`, `iris`).
        name: String,
        /// Confirm: this stops the agent, migrates its state dir, and
        /// restarts it. Required — the command refuses without it.
        #[arg(long)]
        yes: bool,
    },
}

#[tokio::main]
async fn main() -> Result<()> {
    tracing_subscriber::fmt()
        .with_env_filter(
            tracing_subscriber::EnvFilter::try_from_default_env()
                .unwrap_or_else(|_| tracing_subscriber::EnvFilter::new("info")),
        )
        .init();
    let cli = Cli::parse();
    let socket = cli.socket;
    match cli.cmd {
        Cmd::Forge { cmd } => match cmd {
            ForgeCmd::CreateUser {
                name,
                password,
                password_stdin,
            } => forge_create_user(&name, password.as_deref(), password_stdin).await,
        },
        Cmd::Matrix { cmd } => match cmd {
            MatrixCmd::CreateUser {
                name,
                password,
                password_stdin,
            } => matrix_create_user(&name, password.as_deref(), password_stdin).await,
            MatrixCmd::SyncAdmin => matrix_sync_admin().await,
            MatrixCmd::PromoteUser { name } => matrix_promote_user(&name).await,
            MatrixCmd::ResetPassword { name } => matrix_reset_password(&name).await,
            MatrixCmd::Invite { user, room } => matrix_invite(&user, room.as_deref()).await,
        },
        Cmd::Gateway { cmd } => match cmd {
            GatewayCmd::CreateUser {
                file,
                username,
                password,
                password_stdin,
            } => gateway_create_user(&file, &username, password.as_deref(), password_stdin),
            GatewayCmd::DeleteUser { file, username } => gateway_delete_user(&file, &username),
            GatewayCmd::ListUsers { file } => gateway_list_users(&file),
        },
        Cmd::Agents { cmd } => match cmd {
            AgentsCmd::List { json } => agents_list(&socket, json).await,
            AgentsCmd::Restart { name, no_wait } => agents_restart(&socket, &name, no_wait).await,
            AgentsCmd::RestartAll { no_wait } => agents_restart_all(&socket, no_wait).await,
        },
        Cmd::Wg { cmd } => match cmd {
            WgCmd::Init { address } => wg_init(&socket, address.as_deref()).await,
            WgCmd::Peer {
                domain,
                pubkey,
                address,
                endpoint,
            } => {
                wg_peer(&domain, &pubkey, &address, endpoint.as_deref());
                Ok(())
            }
            WgCmd::Status => wg_status(),
        },
        Cmd::PeerConfig {
            wg_address,
            wg_endpoint,
        } => {
            let domain = require_hive_domain(&socket).await?;
            peer_config(&domain, wg_address.as_deref(), wg_endpoint.as_deref());
            Ok(())
        }
        Cmd::Stop {
            scope,
            graceful,
            no_wait,
        } => stop(&socket, scope.to_scope(), graceful, no_wait).await,
        Cmd::Start { scope, no_wait } => start(&socket, scope.to_scope(), no_wait).await,
        Cmd::Restart { scope, graceful } => restart(&socket, scope.to_scope(), graceful).await,
        Cmd::Subvol { cmd } => match cmd {
            SubvolCmd::Upgrade { name, yes } => subvol_upgrade(&socket, &name, yes).await,
        },
        Cmd::Choom {
            name,
            resume_session,
        } => choom(&name, resume_session.as_deref()),
        Cmd::Quota { cmd } => match cmd {
            QuotaCmd::Enable => quota_enable().await,
            QuotaCmd::Show { name } => quota_show(name.as_deref()).await,
            QuotaCmd::Limit { name, size } => quota_limit(&name, &size).await,
        },
        Cmd::MarkdownDocs => {
            print!("{}", clap_markdown::help_markdown::<Cli>());
            Ok(())
        }
        Cmd::Open { target } => open_url(&socket, target).await,
        Cmd::Completions { shell } => {
            generate_completions(shell);
            Ok(())
        }
    }
}

/// `open <home|forge|matrix>` — resolve the surface URL from the daemon,
/// print it, then best-effort `xdg-open` it. Printing is the reliable
/// core (headless / SSH hosts where no browser opener exists); the open
/// is convenience on top, so a missing/failed `xdg-open` is not an error.
async fn open_url(socket: &Path, target: OpenTarget) -> Result<()> {
    let urls = query_hive_urls(socket).await.context(
        "could not reach the hive-c0re daemon for URLs — is hive-c0re running? \
         (the socket is at /run/hyperhive/host.sock)",
    )?;
    let (url, hint) = match target {
        OpenTarget::Home => (
            urls.home,
            "the dashboard URL needs `services.hyperhive.domain` to be set",
        ),
        OpenTarget::Forge => (
            urls.forge,
            "the public forge URL needs `services.hyperhive.forge.behindGateway = true`",
        ),
        OpenTarget::Matrix => (
            urls.matrix,
            "the matrix GUI URL needs `services.hyperhive.matrix.gui.enable = true`",
        ),
    };
    let url = url.with_context(|| format!("no URL available for this surface — {hint}"))?;
    println!("{url}");
    // Best-effort: many hosts are headless, so a missing opener or a
    // non-zero exit is fine — the URL is already printed.
    match std::process::Command::new("xdg-open").arg(&url).status() {
        Ok(status) if status.success() => {}
        Ok(status) => eprintln!("note: xdg-open exited with {status} (URL printed above)"),
        Err(e) => eprintln!("note: could not run xdg-open ({e}) (URL printed above)"),
    }
    Ok(())
}

/// Emit a shell completion script for `hivectl` to stdout. Walks the clap
/// command tree (the single source of truth — same tree `markdown-docs`
/// renders) so completions never drift from the actual verbs/flags.
fn generate_completions(shell: clap_complete::Shell) {
    use clap::CommandFactory as _;
    let mut cmd = Cli::command();
    clap_complete::generate(shell, &mut cmd, "hivectl", &mut std::io::stdout());
}

/// Host path of this hive's WireGuard private key (matches the
/// `privateKeyFile` example in the swarm.wireguard nix options).
const WG_KEY_PATH: &str = "/etc/wireguard/hive.key";
/// The mesh interface name hive-c0re's nix module brings up.
const WG_INTERFACE: &str = "wg-hive";

/// Host path of this hive's self-signed CA cert (matches the
/// `services.hyperhive.tls.stateDir` default in hive-tls.nix). Its
/// existence means the gateway serves a self-signed, hive-CA-signed leaf,
/// so a federating peer needs this CA via `swarm.peers.<d>.caCert`. Absent
/// = ACME / operator cert (trusted by the default CA bundle, no `caCert`).
const HIVE_TLS_CA_PATH: &str = "/var/lib/hive-tls/ca.pem";

/// Best-effort query for this hive's domain from the running daemon
/// (`HostRequest::Urls`, which reads `HYPERHIVE_HIVE_DOMAIN` from c0re's
/// service env). `None` when the daemon is unreachable or the domain is
/// unset — callers decide whether that's fatal.
async fn query_hive_domain(socket: &Path) -> Option<String> {
    query_hive_urls(socket).await.and_then(|u| u.domain)
}

/// Best-effort query for this hive's domain + browser-facing web URLs
/// (`HostRequest::Urls`). `None` when the daemon is unreachable.
async fn query_hive_urls(socket: &Path) -> Option<hive_sh4re::HiveUrls> {
    hive_c0re::client::request(socket, hive_sh4re::HostRequest::Urls)
        .await
        .ok()
        .and_then(|r| r.urls)
}

/// Require this hive's domain from the daemon for snippet generation.
/// Errors with a clear hint when it can't be resolved, so `peer-config`
/// never silently emits a wrong key.
async fn require_hive_domain(socket: &Path) -> Result<String> {
    query_hive_domain(socket).await.context(
        "could not determine this hive's domain from the daemon — is hive-c0re running \
         and `services.hyperhive.domain` set?",
    )
}

/// `wg init` — generate (if absent) the hive's WireGuard key, print its
/// public key + the nix snippet to enable the mesh, then (best-effort)
/// the `peer-config` block peers paste to federate with this hive, so a
/// fresh setup is one command. The domain comes from the daemon; if it
/// can't be resolved, the peer block is skipped (init still succeeds —
/// its core job is enabling the mesh locally).
async fn wg_init(socket: &Path, address: Option<&str>) -> Result<()> {
    use std::os::unix::fs::PermissionsExt as _;
    let key_path = Path::new(WG_KEY_PATH);
    if key_path.exists() {
        println!(
            "WireGuard private key already present at {WG_KEY_PATH} — reusing (not regenerating)."
        );
    } else {
        if let Some(parent) = key_path.parent() {
            std::fs::create_dir_all(parent)
                .with_context(|| format!("create {}", parent.display()))?;
            std::fs::set_permissions(parent, std::fs::Permissions::from_mode(0o700)).ok();
        }
        let out = std::process::Command::new("wg")
            .arg("genkey")
            .output()
            .context("run `wg genkey` (is wireguard-tools installed?)")?;
        if !out.status.success() {
            bail!(
                "wg genkey failed: {}",
                String::from_utf8_lossy(&out.stderr).trim()
            );
        }
        std::fs::write(key_path, &out.stdout)
            .with_context(|| format!("write {}", key_path.display()))?;
        std::fs::set_permissions(key_path, std::fs::Permissions::from_mode(0o400))
            .with_context(|| format!("chmod 400 {}", key_path.display()))?;
        println!("Generated WireGuard private key at {WG_KEY_PATH} (0400).");
    }

    let privkey =
        std::fs::read(key_path).with_context(|| format!("read {}", key_path.display()))?;
    let pubkey = wg_pubkey(&privkey)?;
    let addr = address.unwrap_or("<MESH_ADDRESS e.g. 10.42.0.1/32>");
    println!("\nPublic key (share this with peer hives — they pass it to `hivectl wg peer`):");
    println!("  {pubkey}");
    println!("\nAdd to this hive's NixOS config:");
    println!("  services.hyperhive.swarm.wireguard = {{");
    println!("    enable = true;");
    println!("    privateKeyFile = \"{WG_KEY_PATH}\";");
    println!("    address = \"{addr}\";");
    println!("    # listenPort = 51820;  # default");
    println!("  }};");

    // Also print the block a peer pastes to federate with us (CA + this
    // mesh key) — one-stop setup. Domain comes from the daemon;
    // best-effort, so init still succeeds when it can't be resolved.
    if let Some(d) = query_hive_domain(socket).await {
        println!();
        peer_config(&d, address, None);
    }
    Ok(())
}

/// Derive a WireGuard public key from a private key by piping it through
/// `wg pubkey`.
fn wg_pubkey(privkey: &[u8]) -> Result<String> {
    use std::io::Write as _;
    use std::process::{Command, Stdio};
    let mut child = Command::new("wg")
        .arg("pubkey")
        .stdin(Stdio::piped())
        .stdout(Stdio::piped())
        .stderr(Stdio::piped())
        .spawn()
        .context("run `wg pubkey` (is wireguard-tools installed?)")?;
    child
        .stdin
        .take()
        .context("wg pubkey: stdin unavailable")?
        .write_all(privkey)
        .context("write private key to `wg pubkey`")?;
    let out = child.wait_with_output().context("wait for `wg pubkey`")?;
    if !out.status.success() {
        bail!(
            "wg pubkey failed: {}",
            String::from_utf8_lossy(&out.stderr).trim()
        );
    }
    Ok(String::from_utf8_lossy(&out.stdout).trim().to_owned())
}

/// `wg peer` — print the nix snippet to add a peer hive to the mesh.
/// Pure output (no fallible work), so it returns `()`; the dispatch arm
/// wraps it in `Ok` to match the sibling verbs.
fn wg_peer(domain: &str, pubkey: &str, address: &str, endpoint: Option<&str>) {
    println!("Add to this hive's NixOS config:");
    println!("  services.hyperhive.swarm.peers.\"{domain}\" = {{");
    println!("    wireguardPublicKey = \"{pubkey}\";");
    println!("    wireguardAddress = \"{address}\";");
    if let Some(ep) = endpoint {
        println!("    wireguardEndpoint = \"{ep}\";");
    }
    println!("  }};");
}

/// `peer-config` — print the `swarm.peers."<domain>"` block a peer
/// operator pastes to federate with THIS hive, plus a `cp` line for the
/// CA when this hive is self-signed. Reads local state only (the TLS CA
/// cert presence + the wg key); prints, never mutates.
fn peer_config(domain: &str, wg_address: Option<&str>, wg_endpoint: Option<&str>) {
    let self_signed = Path::new(HIVE_TLS_CA_PATH).exists();
    // CA filename derived from the first DNS label so multiple peers'
    // certs don't collide in the operator's config dir.
    let ca_file = format!("{}-ca.pem", domain.split('.').next().unwrap_or("peer"));
    // WireGuard public key, when this hive has a mesh key. Best-effort:
    // a missing key or absent `wg` binary just omits the mesh lines.
    let wg_pub = std::fs::read(WG_KEY_PATH)
        .ok()
        .and_then(|k| wg_pubkey(&k).ok());

    if self_signed {
        println!("# 1. copy this hive's CA cert next to the peer's config:");
        println!("cp {HIVE_TLS_CA_PATH} ./{ca_file}");
        println!();
        println!("# 2. paste into the peer hive's NixOS config:");
    } else {
        println!("# paste into the peer hive's NixOS config:");
    }
    println!("services.hyperhive.swarm.peers.\"{domain}\" = {{");
    if self_signed {
        println!("  caCert = ./{ca_file};");
    }
    if let Some(pk) = &wg_pub {
        println!("  wireguardPublicKey = \"{pk}\";");
    }
    if let Some(addr) = wg_address {
        println!("  wireguardAddress = \"{addr}\";");
    }
    if let Some(ep) = wg_endpoint {
        println!("  wireguardEndpoint = \"{ep}\";");
    }
    println!("}};");
    if !self_signed {
        println!(
            "# (this hive's cert chains to a public CA — no `caCert` needed; \
             it's trusted by the default bundle.)"
        );
    }
}

/// `wg status` — show the live mesh interface (`wg show wg-hive`),
/// inheriting stdout so the operator sees it directly.
fn wg_status() -> Result<()> {
    let status = std::process::Command::new("wg")
        .args(["show", WG_INTERFACE])
        .status()
        .context("run `wg show` (is wireguard-tools installed?)")?;
    if !status.success() {
        bail!(
            "`wg show {WG_INTERFACE}` failed — is the mesh enabled + up? \
             (services.hyperhive.swarm.wireguard.enable = true, then deploy)"
        );
    }
    Ok(())
}

/// `quota enable` — turn on btrfs qgroup accounting (operator opt-in).
async fn quota_enable() -> Result<()> {
    hive_c0re::priv_client::ensure_btrfs_quota()
        .await
        .context("enable btrfs qgroup accounting")?;
    println!("btrfs qgroup accounting enabled on the agent-state filesystem.");
    println!("(usage may read 0 until btrfs finishes its background rescan)");
    Ok(())
}

/// `quota show [name]` — report per-agent disk usage from btrfs qgroups.
async fn quota_show(name: Option<&str>) -> Result<()> {
    let agents: Vec<String> = match name {
        Some(n) => vec![n.to_owned()],
        None => Coordinator::kept_state_names(),
    };
    if agents.is_empty() {
        println!("no agents with a state dir found");
        return Ok(());
    }
    for agent in &agents {
        match hive_c0re::priv_client::read_subvolume_usage(agent).await {
            Ok((rfer, excl)) => {
                println!(
                    "{agent:<12} referenced {:>10}   exclusive {:>10}",
                    human_bytes(rfer),
                    human_bytes(excl)
                );
            }
            Err(e) => {
                let msg = format!("{e:#}");
                // btrfs-progs prints "ERROR: ... quota not enabled" to stderr
                // when qgroups are off; match the stable fragment case-
                // insensitively rather than an exact line (the surrounding
                // wording varies across btrfs-progs versions).
                if msg.to_ascii_lowercase().contains("quota not enabled") {
                    bail!("btrfs quota not enabled — run `hivectl quota enable` first");
                }
                // A plain-dir agent (no subvolume) has no qgroup; report it
                // inline and keep going rather than aborting the whole sweep.
                println!("{agent:<12} (no qgroup data — plain dir or: {msg})");
            }
        }
    }
    Ok(())
}

/// `quota limit <name> <size>` — set or clear an agent's disk quota.
async fn quota_limit(name: &str, size: &str) -> Result<()> {
    let limit = parse_quota_size(size)?;
    hive_c0re::priv_client::set_subvolume_quota(name, limit)
        .await
        .with_context(|| format!("set quota for {name}"))?;
    match limit {
        Some(n) => println!("set {name} quota to {} ({n} bytes)", human_bytes(n)),
        None => println!("cleared {name} quota"),
    }
    Ok(())
}

/// Parse a quota size: a byte count, a `K`/`M`/`G`/`T`-suffixed value
/// (powers of 1024), or `none` to clear. Rejects overflow + bad input.
fn parse_quota_size(s: &str) -> Result<Option<u64>> {
    let t = s.trim();
    if t.eq_ignore_ascii_case("none") {
        return Ok(None);
    }
    let (num, mult) = match t.chars().last() {
        Some('K' | 'k') => (&t[..t.len() - 1], 1024u64),
        Some('M' | 'm') => (&t[..t.len() - 1], 1024 * 1024),
        Some('G' | 'g') => (&t[..t.len() - 1], 1024 * 1024 * 1024),
        Some('T' | 't') => (&t[..t.len() - 1], 1024u64 * 1024 * 1024 * 1024),
        _ => (t, 1),
    };
    let n: u64 = num.trim().parse().with_context(|| {
        format!("invalid size {s:?} — use a byte count, a K/M/G/T suffix (e.g. 5G), or `none`")
    })?;
    n.checked_mul(mult)
        .map(Some)
        .with_context(|| format!("size {s:?} overflows u64"))
}

/// Format a byte count as a human-friendly KiB/MiB/GiB/TiB string.
#[allow(clippy::cast_precision_loss)] // display-only; precision loss is cosmetic
fn human_bytes(n: u64) -> String {
    const UNITS: [&str; 5] = ["B", "KiB", "MiB", "GiB", "TiB"];
    if n < 1024 {
        return format!("{n} B");
    }
    let mut v = n as f64;
    let mut i = 0;
    while v >= 1024.0 && i < UNITS.len() - 1 {
        v /= 1024.0;
        i += 1;
    }
    format!("{v:.1} {}", UNITS[i])
}

/// True when `name` matches an existing hyperhive agent — i.e. it has a
/// persistent state dir under `/var/lib/hyperhive/agents/`. We use the
/// state dir (not the live container list) so kept-state tombstones
/// still resolve as agents — re-provisioning a destroyed-but-kept agent
/// should still drop its token in the existing state tree.
///
/// Uses `try_exists()` rather than `Path::exists()` so a permission
/// error reaching the agents root is surfaced, not collapsed into
/// `false`. The agents root is `0700 hive-core`, so running hivectl
/// without root yields EACCES on traversal — `Path::exists()` would
/// silently report `false`, which callers turn into a misleading "no
/// such agent" (or, for the create-user paths, a silent misclassify of
/// a real agent as a non-agent account). Mapping EACCES to an explicit
/// "needs root" error fixes that first-run footgun, where running a
/// privileged verb without sudo reported as a missing agent.
fn agent_exists(name: &str) -> Result<bool> {
    let root = Coordinator::agent_state_root(name);
    match root.try_exists() {
        Ok(found) => Ok(found),
        Err(e) if e.kind() == std::io::ErrorKind::PermissionDenied => bail!(
            "cannot read the agents root {} (permission denied) - this command needs root; \
             re-run with sudo",
            root.parent().unwrap_or(&root).display()
        ),
        Err(e) => Err(e).with_context(|| format!("check agent state dir {}", root.display())),
    }
}

/// Drop into an interactive Claude session in the agent container.
///
/// Execs `machinectl shell <name>@h-<name>` running claude as the agent
/// user from its state dir, reproducing the harness's per-turn claude
/// invocation (flags, session selection, why it never collides with the
/// live harness session). See `docs/tools/hivectl.md` (Choom) for the
/// full rationale. Inherits the caller's PTY; requires root + a running
/// container.
fn choom(name: &str, resume_session: Option<&str>) -> Result<()> {
    if !agent_exists(name)? {
        bail!("no such agent: '{name}' (no state dir under /var/lib/hyperhive/agents/)");
    }
    let container = hive_c0re::lifecycle::container_name(name);
    // Enter as the agent's unix user (== agent name) so claude reads the
    // right `$HOME/.claude`.
    let target = format!("{name}@{container}");
    let claude = "/run/current-system/sw/bin/claude";
    // Bind-mounted state dir; matches `hive-ag3nt::paths::state_dir()`.
    let state_dir = format!("/agents/{name}/state");
    // Per-turn config the harness writes; matches `paths::config_dir()`.
    let cfg = "/run/hive-config";
    // `--resume <value>` passes through as `claude --resume <value>` —
    // the rejoin-by-id surface. (claude's `--continue` is a bare flag
    // that resumes the cwd's latest session — the harness's — and would
    // consume a trailing value as the first PROMPT; choom never uses
    // it.) The value is single-quoted into the shell script, so reject
    // an embedded single quote (the only char that breaks
    // single-quoting) to rule out injection — session ids never
    // contain one.
    let session_arg = match resume_session {
        Some(val) => {
            if val.contains('\'') {
                bail!("invalid --resume value '{val}': must not contain a single quote");
            }
            format!("set -- --resume '{val}';")
        }
        None => "set --;".to_string(),
    };
    // Build claude's argv as the harness does, each flag included only
    // when its file is present so a half-up container degrades to a bare
    // session. `name` is `[a-z0-9._-]` so there's nothing to quote.
    let inner = format!(
        "cd {state_dir} || exit 1; {session_arg} \
         [ -f {cfg}/claude-settings.json ] && set -- \"$@\" --settings {cfg}/claude-settings.json; \
         [ -f {cfg}/claude-mcp-config.json ] && set -- \"$@\" --mcp-config {cfg}/claude-mcp-config.json; \
         [ -f {cfg}/claude-system-prompt.md ] && set -- \"$@\" --system-prompt-file {cfg}/claude-system-prompt.md; \
         exec {claude} \"$@\""
    );
    let mut cmd = std::process::Command::new("machinectl");
    cmd.arg("shell")
        .arg(&target)
        .arg("/bin/sh")
        .arg("-lc")
        .arg(&inner);
    // exec() replaces the current process — we inherit stdin/stdout/stderr
    // (the caller's PTY) so the Claude session is fully interactive.
    // This call only returns on error.
    let err = cmd.exec();
    Err(anyhow::anyhow!("exec machinectl: {err}"))
}

async fn forge_create_user(name: &str, password: Option<&str>, password_stdin: bool) -> Result<()> {
    if !hive_c0re::forge::is_present().await {
        bail!(
            "hive-forge container not running — wait for hive-c0re to start it before provisioning forge users"
        );
    }
    let user_password = resolve_password(password, password_stdin)?;
    if agent_exists(name)? {
        if user_password.is_some() {
            bail!(
                "forge create-user: --password / --password-stdin is for non-agent (operator) accounts only; '{name}' is an agent which authenticates via API token"
            );
        }
        hive_c0re::forge::ensure_user_for(name)
            .await
            .with_context(|| format!("forge create-user {name}"))?;
        let path = Coordinator::agent_notes_dir(name).join("forge-token");
        println!("forge: provisioned agent user '{name}'");
        println!("token persisted at: {}", path.display());
    } else {
        let token = hive_c0re::forge::provision_user_token(name, user_password.as_deref())
            .await
            .with_context(|| format!("forge create-user {name}"))?;
        println!("forge: provisioned user '{name}' (not an agent — token not persisted)");
        println!("token: {token}");
        if password.is_some() || password_stdin {
            println!("password: set as supplied — use it to log into the forge web UI");
        } else {
            println!(
                "password: random throwaway (not surfaced — pass --password or --password-stdin to set one you can use)"
            );
        }
    }
    Ok(())
}

/// Resolve the password the caller asked for, or return `None` to fall
/// back to a random throwaway. `--password <PW>` wins outright;
/// `--password-stdin` reads one line off stdin (trailing newline
/// stripped). Empty stdin is treated as an error so the caller doesn't
/// silently provision an empty-password account.
fn resolve_password(password: Option<&str>, password_stdin: bool) -> Result<Option<String>> {
    if let Some(p) = password {
        return Ok(Some(p.to_owned()));
    }
    if password_stdin {
        use std::io::BufRead as _;
        let stdin = std::io::stdin();
        let mut line = String::new();
        stdin
            .lock()
            .read_line(&mut line)
            .context("read password from stdin")?;
        let trimmed = line.trim_end_matches(['\r', '\n']).to_owned();
        if trimmed.is_empty() {
            bail!("--password-stdin: empty input");
        }
        return Ok(Some(trimmed));
    }
    Ok(None)
}

async fn matrix_create_user(
    name: &str,
    password: Option<&str>,
    password_stdin: bool,
) -> Result<()> {
    if !hive_c0re::matrix::is_present().await {
        bail!(
            "hive-matrix container not running — start it (services.hyperhive.matrix.enable = true) before provisioning matrix users"
        );
    }
    let register_token =
        hive_c0re::matrix::ensure_register_token().context("read matrix register token")?;
    let client = reqwest::Client::builder()
        .timeout(std::time::Duration::from_secs(30))
        .build()
        .context("build reqwest client")?;
    let user_password = resolve_password(password, password_stdin)?;
    if agent_exists(name)? {
        if user_password.is_some() {
            // The boot-sweep / approval-time agent provisioning path
            // doesn't accept a password — agents auth by access_token,
            // never by password. Refuse rather than silently dropping it.
            bail!(
                "matrix create-user: --password / --password-stdin is for non-agent (operator) accounts only; '{name}' is an agent which authenticates via access_token"
            );
        }
        hive_c0re::matrix::ensure_user_for(&client, name, &register_token)
            .await
            .with_context(|| format!("matrix create-user {name}"))?;
        let path = Coordinator::agent_notes_dir(name).join("matrix-token");
        println!("matrix: provisioned agent user '{name}'");
        println!("token persisted at: {}", path.display());
    } else {
        let effective_password = match user_password {
            Some(p) => p,
            None => {
                hive_c0re::matrix::random_password().context("generate random matrix password")?
            }
        };
        let token = hive_c0re::matrix::provision_user_token(
            &client,
            name,
            &register_token,
            &effective_password,
        )
        .await
        .with_context(|| format!("matrix create-user {name}"))?;
        println!("matrix: provisioned user '{name}' (not an agent — token not persisted)");
        println!("token: {token}");
        if password.is_some() || password_stdin {
            println!("password: set as supplied — use it to log into a matrix web client");
        } else {
            println!(
                "password: random throwaway (not surfaced — pass --password or --password-stdin to set one you can use)"
            );
        }
    }
    Ok(())
}

async fn matrix_sync_admin() -> Result<()> {
    if !hive_c0re::matrix::is_present().await {
        bail!(
            "hive-matrix container not running — start it (services.hyperhive.matrix.enable = true) first"
        );
    }
    let register_token =
        hive_c0re::matrix::ensure_register_token().context("read matrix register token")?;
    let client = reqwest::Client::builder()
        .timeout(std::time::Duration::from_secs(30))
        .build()
        .context("build reqwest client")?;
    hive_c0re::matrix::ensure_admin_user(&client, &register_token)
        .await
        .context("matrix sync-admin")?;
    let path = hive_c0re::matrix::admin_token_path();
    println!(
        "matrix: hive admin user '@{}' provisioned",
        hive_c0re::matrix::HIVE_ADMIN_LOCALPART
    );
    println!("token persisted at: {}", path.display());
    Ok(())
}

async fn matrix_promote_user(name: &str) -> Result<()> {
    if !hive_c0re::matrix::is_present().await {
        bail!(
            "hive-matrix container not running — start it (services.hyperhive.matrix.enable = true) first"
        );
    }
    let admin_token = hive_c0re::matrix::read_admin_token()?;
    let client = reqwest::Client::builder()
        .timeout(std::time::Duration::from_secs(30))
        .build()
        .context("build reqwest client")?;
    let server_name = hive_c0re::matrix::discover_server_name(&client)
        .await
        .context("discover matrix server_name")?;
    hive_c0re::matrix::promote_user_to_admin(&client, &admin_token, name, &server_name)
        .await
        .with_context(|| format!("matrix promote-user {name}"))?;
    println!("matrix: promoted @{name}:{server_name} to admin");
    Ok(())
}

async fn matrix_invite(user: &str, room: Option<&str>) -> Result<()> {
    if !hive_c0re::matrix::is_present().await {
        bail!(
            "hive-matrix container not running — start it (services.hyperhive.matrix.enable = true) first"
        );
    }
    let admin_token = hive_c0re::matrix::read_admin_token()?;
    let client = reqwest::Client::builder()
        .timeout(std::time::Duration::from_secs(30))
        .build()
        .context("build reqwest client")?;
    let server_name = hive_c0re::matrix::discover_server_name(&client)
        .await
        .context("discover matrix server_name")?;
    let room_id = hive_c0re::matrix::invite_user(&client, &admin_token, user, room, &server_name)
        .await
        .with_context(|| format!("matrix invite {user}"))?;
    let target = if user.starts_with('@') {
        user.to_owned()
    } else {
        format!("@{user}:{server_name}")
    };
    println!("matrix: invited {target} to {room_id}");
    Ok(())
}

async fn matrix_reset_password(name: &str) -> Result<()> {
    if !hive_c0re::matrix::is_present().await {
        bail!(
            "hive-matrix container not running — start it (services.hyperhive.matrix.enable = true) first"
        );
    }
    let admin_token = hive_c0re::matrix::read_admin_token()?;
    let client = reqwest::Client::builder()
        .timeout(std::time::Duration::from_secs(30))
        .build()
        .context("build reqwest client")?;
    let server_name = hive_c0re::matrix::discover_server_name(&client)
        .await
        .context("discover matrix server_name")?;
    hive_c0re::matrix::reset_user_password(&client, &admin_token, name, &server_name)
        .await
        .with_context(|| format!("matrix reset-password {name}"))?;
    // Password is persisted by reset_user_password.
    let pw_path = hive_c0re::paths::matrix_creds_dir().join(format!("{name}-password"));
    println!("matrix: password for @{name}:{server_name} reset");
    println!("password persisted at: {}", pw_path.display());
    println!("next: hivectl matrix create-user {name}   # mints a fresh access token");
    Ok(())
}

// ---------------------------------------------------------------------------
// Gateway htpasswd helpers
// ---------------------------------------------------------------------------

/// Read an htpasswd file into a list of lines, or return an empty list
/// if the file does not exist yet.
fn htpasswd_read(path: &Path) -> Result<Vec<String>> {
    if !path.exists() {
        return Ok(vec![]);
    }
    let content = std::fs::read_to_string(path)
        .with_context(|| format!("read htpasswd file {}", path.display()))?;
    Ok(content.lines().map(str::to_owned).collect())
}

/// Write lines back to `path` atomically (write to `<path>.tmp`, then
/// rename). A trailing newline is always appended to the last line.
fn htpasswd_write(path: &Path, lines: &[String]) -> Result<()> {
    let tmp = path.with_extension("htpasswd.tmp");
    let content = if lines.is_empty() {
        String::new()
    } else {
        let mut s = lines.join("\n");
        s.push('\n');
        s
    };
    std::fs::write(&tmp, &content)
        .with_context(|| format!("write htpasswd tmp {}", tmp.display()))?;
    std::fs::rename(&tmp, path)
        .with_context(|| format!("rename {} → {}", tmp.display(), path.display()))?;
    Ok(())
}

/// Add or update `username` in the htpasswd file at `file`, hashing
/// `password` with `BCrypt` (cost 12). Creates the file when absent.
fn gateway_create_user(
    file: &Path,
    username: &str,
    password: Option<&str>,
    password_stdin: bool,
) -> Result<()> {
    let pw = resolve_password(password, password_stdin)?.ok_or_else(|| {
        anyhow::anyhow!("a password is required — pass --password or --password-stdin")
    })?;
    validate_htpasswd_username(username)?;
    let raw_hash = bcrypt::hash(&pw, 12).context("bcrypt hash")?;
    // nginx auth_basic only recognises $2a$/$2x$/$2y$ — not $2b$. The two
    // prefixes are algorithmically identical; remap so nginx accepts the hash.
    let hash = raw_hash.replacen("$2b$", "$2y$", 1);
    let entry = format!("{username}:{hash}");
    let mut lines = htpasswd_read(file)?;
    let prefix = format!("{username}:");
    if let Some(pos) = lines.iter().position(|l| l.starts_with(&prefix)) {
        lines[pos] = entry;
        htpasswd_write(file, &lines)?;
        println!(
            "gateway: updated password for '{username}' in {}",
            file.display()
        );
    } else {
        lines.push(entry);
        htpasswd_write(file, &lines)?;
        println!("gateway: added user '{username}' to {}", file.display());
    }
    Ok(())
}

/// Remove `username` from the htpasswd file. Errors when the user is
/// not present so callers can detect the no-op case.
fn gateway_delete_user(file: &Path, username: &str) -> Result<()> {
    let mut lines = htpasswd_read(file)?;
    let prefix = format!("{username}:");
    let before = lines.len();
    lines.retain(|l| !l.starts_with(&prefix));
    if lines.len() == before {
        bail!("gateway: user '{username}' not found in {}", file.display());
    }
    htpasswd_write(file, &lines)?;
    println!("gateway: removed user '{username}' from {}", file.display());
    Ok(())
}

/// Print one username per line from the htpasswd file.
fn gateway_list_users(file: &Path) -> Result<()> {
    let lines = htpasswd_read(file)?;
    for line in &lines {
        // Skip blank lines and comments.
        if line.is_empty() || line.starts_with('#') {
            continue;
        }
        if let Some((name, _)) = line.split_once(':') {
            println!("{name}");
        }
    }
    Ok(())
}

// ---------------------------------------------------------------------------
// Agent management helpers (require daemon via host admin socket)
// ---------------------------------------------------------------------------

async fn agents_restart(socket: &Path, name: &str, no_wait: bool) -> Result<()> {
    let resp = hive_c0re::client::request(
        socket,
        hive_sh4re::HostRequest::Restart {
            name: name.to_owned(),
        },
    )
    .await
    .with_context(|| format!("connect to daemon socket {}", socket.display()))?;
    if resp.ok {
        println!("restart queued: {name}");
        wait_for_dags(socket, resp.queued_dags.unwrap_or_default(), no_wait).await
    } else {
        bail!(
            "restart {name}: {}",
            resp.error.as_deref().unwrap_or("unknown error")
        )
    }
}

// ---------------------------------------------------------------------------
// Job-queue wait/progress loop — shared by every verb that submits DAGs
// ---------------------------------------------------------------------------

/// Poll the submitted DAG ids (`HostRequest::QueueDag`, ~1s interval)
/// and print a progress line whenever a DAG's rendered state changes —
/// including fan-out children that appear under a polled parent. Exits
/// non-zero when any DAG (or child) ends `failed`; a `cancelled` DAG
/// terminates the wait but is an operator action, not an error.
async fn wait_for_dags(socket: &Path, ids: Vec<u64>, no_wait: bool) -> Result<()> {
    use std::io::IsTerminal as _;
    if no_wait || ids.is_empty() {
        return Ok(());
    }
    // Animate only on a real terminal. Piped / CI output falls back to the
    // plain line-on-change stream so logs stay free of spinner redraw noise.
    if std::io::stderr().is_terminal() {
        wait_for_dags_animated(socket, ids).await
    } else {
        wait_for_dags_plain(socket, ids).await
    }
}

/// Non-TTY progress: print a fresh line whenever a DAG's rendered state
/// changes. No cursor tricks, so it's clean in pipes and CI logs.
async fn wait_for_dags_plain(socket: &Path, ids: Vec<u64>) -> Result<()> {
    let mut pending: std::collections::BTreeSet<u64> = ids.into_iter().collect();
    let mut last: std::collections::HashMap<u64, String> = std::collections::HashMap::new();
    let mut failed: Vec<String> = Vec::new();
    while !pending.is_empty() {
        for id in pending.clone() {
            let resp = hive_c0re::client::request(socket, hive_sh4re::HostRequest::QueueDag { id })
                .await
                .with_context(|| format!("connect to daemon socket {}", socket.display()))?;
            let dags = resp.dags.unwrap_or_default();
            if dags.is_empty() {
                // Evicted from the queue's history tail — it finished a
                // while ago; nothing left to report on.
                println!("job #{id}: gone from queue history");
                pending.remove(&id);
                continue;
            }
            let mut all_terminal = true;
            for d in &dags {
                let line = render_dag_line(d);
                if last.get(&d.id) != Some(&line) {
                    println!("{line}");
                    last.insert(d.id, line);
                }
                // Node-level terminality, not the roll-up: a DAG rolls
                // up `failed` the moment one node fails while its
                // after-any recovery node (rebuild's tail Reconcile)
                // may still be running — keep watching so the operator
                // sees whether the agent came back.
                if d.nodes.iter().all(|n| n.state.is_terminal()) {
                    if d.state == hive_sh4re::jobs::State::Failed {
                        failed.push(format!("{} {}", d.kind.as_str(), d.agent));
                    }
                } else {
                    all_terminal = false;
                }
            }
            if all_terminal {
                pending.remove(&id);
            }
        }
        if !pending.is_empty() {
            tokio::time::sleep(std::time::Duration::from_secs(1)).await;
        }
    }
    finish_wait(failed)
}

/// TTY progress: a live `indicatif` render — one braille-spinner line per
/// DAG node (grouped under a per-DAG header), each with its own elapsed
/// timer, plus an overall-elapsed footer. A node with more than one
/// dependency (fan-in) gets its own row with an `(after …)` marker rather
/// than being crammed onto a chain line.
async fn wait_for_dags_animated(socket: &Path, ids: Vec<u64>) -> Result<()> {
    use indicatif::{MultiProgress, ProgressBar, ProgressStyle};

    let spinner = ProgressStyle::with_template("  {spinner} {msg}")
        .unwrap_or_else(|_| ProgressStyle::default_spinner())
        .tick_strings(&["⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏", "·"]);
    let plain =
        ProgressStyle::with_template("{msg}").unwrap_or_else(|_| ProgressStyle::default_bar());

    let mp = MultiProgress::new();
    let started = std::time::Instant::now();
    // Per-DAG header bars + per-node bars, keyed so we update in place. The
    // insertion order groups a DAG's nodes right under its header.
    let mut dag_bars: std::collections::HashMap<u64, ProgressBar> =
        std::collections::HashMap::new();
    let mut node_bars: std::collections::HashMap<(u64, hive_sh4re::jobs::NodeId), ProgressBar> =
        std::collections::HashMap::new();
    let mut node_done: std::collections::HashSet<(u64, hive_sh4re::jobs::NodeId)> =
        std::collections::HashSet::new();

    let mut pending: std::collections::BTreeSet<u64> = ids.into_iter().collect();
    let mut failed: Vec<String> = Vec::new();

    while !pending.is_empty() {
        let now = now_unix();
        for id in pending.clone() {
            let resp = hive_c0re::client::request(socket, hive_sh4re::HostRequest::QueueDag { id })
                .await
                .with_context(|| format!("connect to daemon socket {}", socket.display()))?;
            let dags = resp.dags.unwrap_or_default();
            if dags.is_empty() {
                mp.println(format!("job #{id}: gone from queue history"))
                    .ok();
                pending.remove(&id);
                continue;
            }
            let mut all_terminal = true;
            for d in &dags {
                let hdr = dag_bars.entry(d.id).or_insert_with(|| {
                    let b = mp.add(ProgressBar::new_spinner());
                    b.set_style(plain.clone());
                    b
                });
                hdr.set_message(format!(
                    "{} {} {} · {}",
                    state_glyph(d.state),
                    d.kind.as_str(),
                    d.agent,
                    fmt_dur(dag_elapsed(d, now)),
                ));
                for n in &d.nodes {
                    let key = (d.id, n.id);
                    if node_done.contains(&key) {
                        continue;
                    }
                    let bar = node_bars.entry(key).or_insert_with(|| {
                        let b = mp.add(ProgressBar::new_spinner());
                        b.set_style(spinner.clone());
                        b.enable_steady_tick(std::time::Duration::from_millis(120));
                        b
                    });
                    if n.state.is_terminal() {
                        bar.set_style(plain.clone());
                        bar.finish_with_message(format!(
                            "  {} {}",
                            state_glyph(n.state),
                            node_line(d, n, now)
                        ));
                        node_done.insert(key);
                    } else {
                        bar.set_message(node_line(d, n, now));
                    }
                }
                if d.nodes.iter().all(|n| n.state.is_terminal()) {
                    if d.state == hive_sh4re::jobs::State::Failed {
                        failed.push(format!("{} {}", d.kind.as_str(), d.agent));
                    }
                } else {
                    all_terminal = false;
                }
            }
            if all_terminal {
                pending.remove(&id);
            }
        }
        if !pending.is_empty() {
            tokio::time::sleep(std::time::Duration::from_secs(1)).await;
        }
    }
    // Leave the final node lines on screen; drop the still-spinning headers
    // into their terminal state and print an overall-elapsed footer.
    for hdr in dag_bars.values() {
        hdr.finish();
    }
    mp.println(format!(
        "done · {} elapsed",
        fmt_dur(started.elapsed().as_secs().try_into().unwrap_or(0))
    ))
    .ok();
    finish_wait(failed)
}

/// Shared tail: succeed when nothing failed, else bail listing the failures.
fn finish_wait(mut failed: Vec<String>) -> Result<()> {
    if failed.is_empty() {
        Ok(())
    } else {
        failed.sort();
        failed.dedup();
        bail!("queued job(s) failed: {}", failed.join(", "))
    }
}

/// Current unix time in seconds (0 on the impossible pre-epoch error).
fn now_unix() -> i64 {
    std::time::SystemTime::now()
        .duration_since(std::time::UNIX_EPOCH)
        .ok()
        .and_then(|d| i64::try_from(d.as_secs()).ok())
        .unwrap_or(0)
}

/// Elapsed seconds for a DAG: `started_at` (falling back to `enqueued_at`)
/// through `finished_at` or `now`.
fn dag_elapsed(d: &hive_sh4re::jobs::DagView, now: i64) -> i64 {
    let start = d.started_at.unwrap_or(d.enqueued_at);
    (d.finished_at.unwrap_or(now) - start).max(0)
}

/// Elapsed seconds for a node: `started_at` → `finished_at`/`now`, or 0
/// when it hasn't started.
fn node_elapsed(n: &hive_sh4re::jobs::NodeView, now: i64) -> i64 {
    match n.started_at {
        Some(start) => (n.finished_at.unwrap_or(now) - start).max(0),
        None => 0,
    }
}

/// Compact duration: `45s` under a minute, else `1m03s`.
fn fmt_dur(secs: i64) -> String {
    let s = secs.max(0);
    if s < 60 {
        format!("{s}s")
    } else {
        format!("{}m{:02}s", s / 60, s % 60)
    }
}

/// One animated node line: kind, live step, an `(after …)` marker for a
/// fan-in node (>1 dep), its elapsed timer, and a truncated error tail.
fn node_line(d: &hive_sh4re::jobs::DagView, n: &hive_sh4re::jobs::NodeView, now: i64) -> String {
    use std::fmt::Write as _;
    let mut s = n.kind.clone();
    if n.state == hive_sh4re::jobs::State::Running
        && let Some(step) = &n.step
    {
        let _ = write!(s, " ({step})");
    }
    if n.deps.len() > 1 {
        let after: Vec<&str> = n
            .deps
            .iter()
            .filter_map(|dep| d.nodes.iter().find(|m| m.id == *dep))
            .map(|m| m.kind.as_str())
            .collect();
        if !after.is_empty() {
            let _ = write!(s, " (after {})", after.join(", "));
        }
    }
    let el = node_elapsed(n, now);
    if el > 0 {
        let _ = write!(s, " · {}", fmt_dur(el));
    }
    if let Some(err) = &n.error {
        let short: String = err.chars().take(100).collect();
        let _ = write!(s, " — {short}");
    }
    s
}

fn state_glyph(state: hive_sh4re::jobs::State) -> &'static str {
    match state {
        hive_sh4re::jobs::State::Queued => "⏸",
        hive_sh4re::jobs::State::Running => "▶",
        hive_sh4re::jobs::State::Done => "✔",
        hive_sh4re::jobs::State::Failed => "✖",
        hive_sh4re::jobs::State::Cancelled => "⊘",
    }
}

/// One progress line for a DAG: roll-up glyph, template, agent, then
/// the node chain with the running node's live step label — the CLI
/// twin of the dashboard's queue card.
fn render_dag_line(d: &hive_sh4re::jobs::DagView) -> String {
    use std::fmt::Write as _;
    let mut out = format!(
        "{} {} {:<12}",
        state_glyph(d.state),
        d.kind.as_str(),
        d.agent
    );
    for (i, n) in d.nodes.iter().enumerate() {
        let sep = if i == 0 { "  " } else { " → " };
        let _ = write!(out, "{sep}{} {}", state_glyph(n.state), n.kind);
        if n.state == hive_sh4re::jobs::State::Running
            && let Some(step) = &n.step
        {
            let _ = write!(out, " ({step})");
        }
    }
    if let Some(err) = d.nodes.iter().find_map(|n| n.error.as_deref()) {
        let short: String = err.chars().take(120).collect();
        let _ = write!(out, "  — {short}");
    }
    out
}

/// `hivectl agents list` — fetch the per-agent status roster from the
/// daemon (`HostRequest::AgentStatus`) and render it as a padded table,
/// or the raw JSON rows with `--json`. Reuses the dashboard's
/// `ContainerView` aggregation, so the CLI and the web UI never drift.
async fn agents_list(socket: &Path, json: bool) -> Result<()> {
    let resp = hive_c0re::client::request(socket, hive_sh4re::HostRequest::AgentStatus)
        .await
        .with_context(|| format!("connect to daemon socket {}", socket.display()))?;
    if !resp.ok {
        bail!(
            "agents list: {}",
            resp.error.as_deref().unwrap_or("unknown error")
        );
    }
    let rows = resp.agent_statuses.unwrap_or_default();
    if json {
        println!("{}", serde_json::to_string_pretty(&rows)?);
        return Ok(());
    }
    if rows.is_empty() {
        println!("no managed agents found");
        return Ok(());
    }
    // STATUS collapses the health flags into one space-separated token so
    // the common case (`running`) stays short and anomalies stand out.
    let status_of = |r: &hive_sh4re::AgentStatusRow| -> String {
        let mut s = if r.running { "running" } else { "stopped" }.to_owned();
        if r.needs_login {
            s.push_str(" needs-login");
        }
        if r.needs_update {
            s.push_str(" needs-update");
        }
        s
    };
    let headers = ["NAME", "STATUS", "REV", "PARENT", "REMIND"];
    let table: Vec<[String; 5]> = rows
        .iter()
        .map(|r| {
            [
                r.name.clone(),
                status_of(r),
                r.deployed_sha.clone().unwrap_or_else(|| "-".to_owned()),
                r.parent.clone().unwrap_or_else(|| "-".to_owned()),
                if r.pending_reminders > 0 {
                    r.pending_reminders.to_string()
                } else {
                    "-".to_owned()
                },
            ]
        })
        .collect();
    let mut widths = headers.map(str::len);
    for row in &table {
        for (i, cell) in row.iter().enumerate() {
            widths[i] = widths[i].max(cell.len());
        }
    }
    let fmt_row = |cells: &[String]| -> String {
        cells
            .iter()
            .enumerate()
            .map(|(i, c)| format!("{c:<w$}", w = widths[i]))
            .collect::<Vec<_>>()
            .join("  ")
            .trim_end()
            .to_owned()
    };
    let header_cells: Vec<String> = headers.iter().map(|h| (*h).to_owned()).collect();
    println!("{}", fmt_row(&header_cells));
    for row in &table {
        println!("{}", fmt_row(row));
    }
    Ok(())
}

async fn agents_restart_all(socket: &Path, no_wait: bool) -> Result<()> {
    let resp = hive_c0re::client::request(socket, hive_sh4re::HostRequest::RestartAll)
        .await
        .with_context(|| format!("connect to daemon socket {}", socket.display()))?;
    let agents = resp.agents.as_deref().unwrap_or(&[]);
    if agents.is_empty() {
        println!("restart-all: no managed containers found");
    } else {
        for a in agents {
            println!("restart queued: {a}");
        }
    }
    if !resp.ok {
        bail!(
            "restart-all: {}",
            resp.error.as_deref().unwrap_or("unknown error")
        );
    }
    wait_for_dags(socket, resp.queued_dags.unwrap_or_default(), no_wait).await
}

async fn stop(
    socket: &Path,
    scope: hive_sh4re::LifecycleScope,
    graceful: bool,
    no_wait: bool,
) -> Result<()> {
    let resp =
        hive_c0re::client::request(socket, hive_sh4re::HostRequest::Stop { scope, graceful })
            .await
            .with_context(|| format!("connect to daemon socket {}", socket.display()))?;
    // Render first, but even when an infra failure makes it bail,
    // watch the already-queued agent DAGs before surfacing the error —
    // they run regardless.
    let rendered = render_lifecycle(&resp, "stop queued");
    wait_for_dags(socket, resp.queued_dags.unwrap_or_default(), no_wait).await?;
    rendered
}

async fn start(socket: &Path, scope: hive_sh4re::LifecycleScope, no_wait: bool) -> Result<()> {
    let resp = hive_c0re::client::request(socket, hive_sh4re::HostRequest::Start { scope })
        .await
        .with_context(|| format!("connect to daemon socket {}", socket.display()))?;
    let rendered = render_lifecycle(&resp, "start queued");
    wait_for_dags(socket, resp.queued_dags.unwrap_or_default(), no_wait).await?;
    rendered
}

/// Restart = `stop` then `start` over the same scope, composed client-side
/// from the two daemon ops (no dedicated wire op). The stop phase honours
/// `--graceful`; if it reports a failure (`stop` returns `Err`) the `?`
/// short-circuits before the start phase, so a half-stopped hive isn't
/// blindly started over — the operator sees the stop errors and can recover.
///
/// No `--no-wait` here on purpose: the stop DAGs must complete before
/// the start submits, otherwise the start's `wanted = Up` write would
/// land before the queued stops execute and turn them into noops.
async fn restart(socket: &Path, scope: hive_sh4re::LifecycleScope, graceful: bool) -> Result<()> {
    stop(socket, scope.clone(), graceful, false).await?;
    start(socket, scope, false).await
}

/// A [`LifecycleScope`](hive_sh4re::LifecycleScope) targeting exactly one
/// agent by name (no infra containers, no all-agents flag).
fn single_agent_scope(name: &str) -> hive_sh4re::LifecycleScope {
    hive_sh4re::LifecycleScope {
        agents: false,
        agent_names: vec![name.to_owned()],
        ci: false,
        forge: false,
        gateway: false,
        matrix: false,
    }
}

/// `subvol upgrade <agent>` — migrate an existing plain-dir agent state root
/// to a btrfs subvolume. Composed client-side (like `restart`): stop the
/// agent so its state bind-mount is released, run the privileged in-place
/// migration via hive-priv, then restart it. The restart is attempted
/// regardless of the migration outcome so a failed migration never leaves
/// the agent down; the migration error (if any) is surfaced afterwards.
async fn subvol_upgrade(socket: &Path, name: &str, yes: bool) -> Result<()> {
    if !agent_exists(name)? {
        bail!("no agent named {name:?} (no state dir under the agents root)");
    }
    if !yes {
        bail!(
            "`subvol upgrade {name}` stops the agent, migrates its state dir to a btrfs \
             subvolume, then restarts it. Re-run with --yes to proceed."
        );
    }

    println!("stopping {name} (releasing its state bind-mount)…");
    let stop_resp = hive_c0re::client::request(
        socket,
        hive_sh4re::HostRequest::Stop {
            scope: single_agent_scope(name),
            graceful: false,
        },
    )
    .await
    .with_context(|| format!("connect to daemon socket {}", socket.display()))?;
    if !stop_resp.ok {
        bail!(
            "stop {name}: {}",
            stop_resp.error.as_deref().unwrap_or("unknown error")
        );
    }
    // The stop is a queued DAG now — the migration below snapshots +
    // swaps the state dir and MUST NOT run under a live bind mount, so
    // wait for the stop to actually execute before touching anything.
    wait_for_dags(socket, stop_resp.queued_dags.unwrap_or_default(), false)
        .await
        .with_context(|| format!("waiting for {name} to stop before the migration"))?;

    println!("migrating {name} state dir to a btrfs subvolume…");
    let upgrade = hive_c0re::priv_client::upgrade_agent_subvolume(name).await;

    // Always attempt the restart, even if the migration failed — don't leave
    // the agent down. Capture the result rather than `?`-ing it so a
    // start-side failure (incl. the IPC call itself erroring) can't mask the
    // migration outcome below.
    println!("starting {name}…");
    let start_result = hive_c0re::client::request(
        socket,
        hive_sh4re::HostRequest::Start {
            scope: single_agent_scope(name),
        },
    )
    .await;

    // Surface the migration outcome FIRST — it's the meaningful result and
    // must not be shadowed by a restart-side failure. On migration failure the
    // original state dir is untouched (the priv op rolls back before the swap).
    upgrade.with_context(|| format!("upgrade {name} state subvolume"))?;

    // Migration succeeded; now surface any restart problem — either the IPC
    // call erroring, or the daemon reporting a failed start. The migration is
    // done regardless, so point at the manual recovery.
    let start_resp = start_result.with_context(|| {
        format!(
            "{name} migrated to a btrfs subvolume, but the restart request to the daemon \
             socket {} failed — run `hivectl start --agent {name}` to bring it back up",
            socket.display()
        )
    })?;
    if !start_resp.ok {
        bail!(
            "{name} migrated to a btrfs subvolume, but restarting it failed: {} — run \
             `hivectl start --agent {name}` to retry",
            start_resp.error.as_deref().unwrap_or("unknown error")
        );
    }
    wait_for_dags(socket, start_resp.queued_dags.unwrap_or_default(), false)
        .await
        .with_context(|| {
            format!(
                "{name} migrated to a btrfs subvolume, but its restart job failed — run \
                 `hivectl start --agent {name}` to retry"
            )
        })?;
    println!("upgraded {name} to a btrfs subvolume and restarted it");
    Ok(())
}

/// Render a hive-wide stop/start response: one `<verb>: <name>` line per
/// touched container, then surface any aggregated per-target failure as a
/// non-zero exit. `verb` is the past-tense word printed per item
/// (`stopped` / `started`).
fn render_lifecycle(resp: &hive_sh4re::HostResponse, verb: &str) -> Result<()> {
    let items = resp.agents.as_deref().unwrap_or(&[]);
    if items.is_empty() {
        println!("{verb}: nothing matched the requested scope");
    } else {
        for item in items {
            println!("{verb}: {item}");
        }
    }
    if !resp.ok {
        bail!(
            "{verb}: {}",
            resp.error.as_deref().unwrap_or("unknown error")
        );
    }
    Ok(())
}

/// Reject usernames containing `:` (field separator) or control chars
/// that would corrupt the htpasswd file format.
fn validate_htpasswd_username(username: &str) -> Result<()> {
    if username.is_empty() {
        bail!("username must not be empty");
    }
    if username.contains(':') {
        bail!("username must not contain ':' (htpasswd field separator)");
    }
    if username.chars().any(char::is_control) {
        bail!("username must not contain control characters");
    }
    Ok(())
}

#[cfg(test)]
mod tests {
    use hive_sh4re::jobs::{DagView, NodeView, Source, State, Template};

    use super::render_dag_line;

    fn node(id: u32, kind: &str, state: State, step: Option<&str>) -> NodeView {
        NodeView {
            id,
            kind: kind.to_owned(),
            deps: if id == 0 { vec![] } else { vec![id - 1] },
            state,
            step: step.map(str::to_owned),
            build_log_id: None,
            started_at: None,
            finished_at: None,
            error: None,
        }
    }

    #[test]
    fn render_dag_line_shows_chain_and_running_step() {
        let dag = DagView {
            id: 7,
            agent: "alice".to_owned(),
            kind: Template::Rebuild,
            state: State::Running,
            source: Source::Manual,
            parent_id: None,
            reason: "manual".to_owned(),
            enqueued_at: 0,
            started_at: Some(1),
            finished_at: None,
            inputs: vec![],
            approval_id: None,
            perm_payload: None,
            nodes: vec![
                node(0, "prebuild", State::Done, None),
                node(1, "stop_for_update", State::Done, None),
                node(2, "swap", State::Running, Some("nixos-container update")),
                node(3, "reconcile", State::Queued, None),
            ],
        };
        let line = render_dag_line(&dag);
        assert!(line.starts_with("▶ rebuild alice"), "{line}");
        assert!(
            line.contains(
                "✔ prebuild → ✔ stop_for_update → ▶ swap (nixos-container update) → ⏸ reconcile"
            ),
            "{line}"
        );
    }

    #[test]
    fn render_dag_line_surfaces_first_node_error() {
        let mut failed = node(0, "prebuild", State::Failed, None);
        failed.error = Some("nix build exploded".to_owned());
        let dag = DagView {
            id: 8,
            agent: "bob".to_owned(),
            kind: Template::Rebuild,
            state: State::Failed,
            source: Source::Manual,
            parent_id: None,
            reason: "manual".to_owned(),
            enqueued_at: 0,
            started_at: Some(1),
            finished_at: Some(2),
            inputs: vec![],
            approval_id: None,
            perm_payload: None,
            nodes: vec![failed],
        };
        let line = render_dag_line(&dag);
        assert!(line.contains("✖ rebuild"), "{line}");
        assert!(line.contains("— nix build exploded"), "{line}");
    }
}