//! hivectl clap command tree: the `Cli` root, the top-level `Cmd`
//! verb enum, and every subcommand enum + shared args struct.

use clap::{Args, Parser, Subcommand};
use std::path::PathBuf;

#[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.\
"
)]
pub 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)]
    pub(crate) socket: PathBuf,
    #[command(subcommand)]
    pub(crate) cmd: Cmd,
}

#[derive(Subcommand)]
pub enum Cmd {
    /// Forgejo user provisioning.
    ///
    /// Manual entry point to the same idempotent provisioning c0re runs at
    /// boot — for recovery, ad-hoc reprovisioning, or fixing one agent
    /// without bouncing the daemon.
    Forge {
        #[command(subcommand)]
        cmd: ForgeCmd,
    },
    /// matrix-tuwunel user provisioning.
    ///
    /// Manual entry point to the same idempotent provisioning c0re runs at
    /// boot — for re-registering an agent the boot sweep skipped, or after
    /// wiping a token file.
    Matrix {
        #[command(subcommand)]
        cmd: MatrixCmd,
    },
    /// GitHub account provisioning.
    ///
    /// Store an operator-supplied personal access token (PAT) for an agent
    /// so its `gh` and git can authenticate. No account is created — the
    /// PAT is for an existing GitHub account.
    Github {
        #[command(subcommand)]
        cmd: GithubCmd,
    },
    /// Gateway htpasswd user management.
    ///
    /// Add, remove, or list users for the gateway's HTTP Basic auth.
    Gateway {
        #[command(subcommand)]
        cmd: GatewayCmd,
    },
    /// Agent container management.
    ///
    /// Lifecycle actions on managed agent containers. Needs the hive-c0re
    /// daemon running.
    Agents {
        #[command(subcommand)]
        cmd: AgentsCmd,
    },
    /// Operator approval queue: list, approve, or deny pending requests.
    ///
    /// Needs the hive-c0re daemon running.
    Approvals {
        #[command(subcommand)]
        cmd: ApprovalsCmd,
    },
    /// WireGuard inter-hive mesh setup helpers.
    ///
    /// Generate this hive's mesh key and print the nix to enable the mesh,
    /// add a peer, or inspect live interface state.
    Wg {
        #[command(subcommand)]
        cmd: WgCmd,
    },
    /// Generate the federation peer-config block for THIS hive.
    ///
    /// Prints the nix a peer operator pastes into their swarm config to
    /// trust and reach this hive.
    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.
    ///
    /// A fresh session by default, or resume a prior one. Requires root
    /// and a running container.
    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; scope flags narrow it to
    /// specific sub-agents or infra containers.
    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 agents stopped by the last
    /// broad-scope `stop` (or starts everything if none); scope flags
    /// narrow it.
    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 one scope.
    ///
    /// Bare `hivectl restart` restarts everything; scope flags narrow it.
    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: enable qgroup accounting, then report per-agent usage or
    /// cap an agent. No-op on non-btrfs hosts.
    Quota {
        #[command(subcommand)]
        cmd: QuotaCmd,
    },
    /// btrfs subvolume management for agent state dirs.
    ///
    /// Upgrade an existing plain-dir agent's state into a btrfs subvolume
    /// so it gains snapshots and per-subvol usage/quota.
    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 so custom forge / matrix
    /// domains work. 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 used by the docs build to keep the published
    /// `hivectl` reference in lockstep with the code.
    #[command(hide = true)]
    MarkdownDocs,
    /// Generate a shell completion script for `hivectl` and print it to
    /// stdout.
    ///
    /// Supports bash, zsh, fish, elvish, and powershell. The NixOS module
    /// already installs the zsh script system-wide; this is for ad-hoc or
    /// other-shell use.
    Completions {
        /// Shell to emit completions for.
        shell: clap_complete::Shell,
    },
}

/// Which hive web surface `hivectl open` targets.
#[derive(Copy, Clone, Debug, clap::ValueEnum)]
pub 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_host_sock::LifecycleScope`).
#[allow(clippy::struct_excessive_bools)]
#[derive(Args)]
pub 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 {
    pub(crate) fn to_scope(&self) -> hive_host_sock::LifecycleScope {
        hive_host_sock::LifecycleScope {
            agents: self.agents,
            agent_names: self.agent.clone(),
            ci: self.ci,
            forge: self.forge,
            gateway: self.gateway,
            matrix: self.matrix,
        }
    }
}

#[derive(Subcommand)]
pub enum ForgeCmd {
    /// Create or refresh the Forgejo account + token for `<name>`.
    ///
    /// For an existing agent, persists the token to its state dir; for a
    /// human/other account, prints the token to stdout. Set a password to
    /// enable forge web-UI login (a random throwaway is used otherwise).
    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,
    },
    /// Show + reconcile the divergence between an agent's local applied
    /// config checkout and its forge `agent-configs/<agent>` main.
    ///
    /// Always prints the diff first. `--from forge` resets the local
    /// checkout to forge main (effective on the next deploy); `--from local`
    /// is not supported yet. With no `--from`, prompts for the direction.
    ReconcileConfig {
        /// Agent whose config branches to reconcile.
        agent: String,
        /// Which side to reconcile from. Omit to be prompted after the diff.
        #[arg(long, value_enum)]
        from: Option<ReconcileFrom>,
        /// Include the full diff (not just `--stat`) in the report.
        #[arg(long)]
        verbose: bool,
    },
}

/// Which side to reconcile config branches from (`hivectl forge
/// reconcile-config --from`). Maps to [`hive_host_sock::ReconcileDirection`].
#[derive(Clone, Copy, clap::ValueEnum)]
pub enum ReconcileFrom {
    /// Reset the local applied checkout to forge main.
    Forge,
    /// Advance forge main from local — not supported yet.
    Local,
}

impl From<ReconcileFrom> for hive_host_sock::ReconcileDirection {
    fn from(from: ReconcileFrom) -> Self {
        match from {
            ReconcileFrom::Forge => Self::Forge,
            ReconcileFrom::Local => Self::Local,
        }
    }
}

#[derive(Subcommand)]
pub enum MatrixCmd {
    /// Create or refresh the matrix account + access token for `<name>`.
    ///
    /// For an existing agent, persists the token to its state dir; for a
    /// human/other account, prints the access token to stdout. Set a
    /// password to enable matrix web-client login (a random throwaway is
    /// used otherwise).
    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.
    ///
    /// Runs automatically on startup; run manually to recover a missing
    /// admin token.
    SyncAdmin,
    /// Promote a matrix user to homeserver admin.
    PromoteUser {
        /// Matrix localpart of the user to promote (e.g. `argus`).
        name: String,
    },
    /// Reset a matrix user's password via the admin API.
    ///
    /// Persists the new password so a later `create-user` can re-login.
    ResetPassword {
        /// Matrix localpart of the account to reset (e.g. `argus`).
        name: String,
    },
    /// Invite a matrix user to the hive Space, or a specific room with
    /// `--room`. Idempotent.
    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>,
    },
}

#[derive(Subcommand)]
pub enum GithubCmd {
    /// Store a GitHub PAT for `<agent>` so its `gh` and git can
    /// authenticate.
    ///
    /// Prefer `--token-stdin` — an inline `--token` is visible in shell
    /// history.
    SetToken {
        /// Logical agent name (the container/agent name).
        agent: String,
        /// The PAT value inline. Mutually exclusive with `--token-stdin`.
        #[arg(long)]
        token: Option<String>,
        /// Read the PAT from stdin (trailing newline stripped). Mutually
        /// exclusive with `--token`.
        #[arg(long, conflicts_with = "token")]
        token_stdin: bool,
    },
}

#[derive(Subcommand)]
pub enum GatewayCmd {
    /// Add a user or update an existing user's password in the gateway
    /// htpasswd.
    ///
    /// Use `--password-stdin` to keep the password out of shell history.
    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,
    },
    /// Remove a user from the gateway htpasswd.
    DeleteUser {
        /// Username to remove.
        username: String,
    },
    /// List all gateway htpasswd usernames, one per line.
    ListUsers,
}

#[derive(Subcommand)]
pub enum WgCmd {
    /// Generate this hive's WireGuard key (if absent) and print its public
    /// key plus the nix to enable the mesh.
    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 to add a peer hive to the mesh.
    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.
    Status,
}

#[derive(Subcommand)]
pub enum QuotaCmd {
    /// Enable btrfs qgroup accounting on the agent-state filesystem.
    ///
    /// Run once before `show` / `limit`. No-op on non-btrfs hosts.
    Enable,
    /// Report per-agent disk usage from btrfs qgroups (all agents, or one
    /// by name).
    Show {
        /// Agent to show (omit for all agents with a state subvolume).
        name: Option<String>,
    },
    /// Set or clear an agent's disk-usage quota.
    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. Shared with `hive-c0re`'s `main.rs`
// default via `hive_host_sock::HOST_SOCKET` — the daemon binds there
// and `hivectl agents` connects to it.
pub(crate) use hive_host_sock::HOST_SOCKET as DEFAULT_HOST_SOCKET;

#[derive(Subcommand)]
pub enum AgentsCmd {
    /// Show all managed agents with their status and technical state.
    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.
    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.
    RestartAll {
        /// Return immediately after the restart DAGs are queued.
        #[arg(long)]
        no_wait: bool,
    },
    /// Park an agent's turn loop, leaving the container running.
    ///
    /// The harness stops driving turns but keeps serving its web UI and
    /// MCP daemons, so the container, its mounts and its warm caches stay
    /// up while it burns no tokens. Inbox messages queue unacked and the
    /// backlog drains on `resume`. Sticky: it survives a restart, and
    /// pausing a stopped agent makes it come up paused.
    Pause {
        /// Agent name.
        name: String,
    },
    /// Resume a paused agent — it drains whatever queued up while parked.
    Resume {
        /// Agent name.
        name: String,
    },
    /// Spawn a new agent container directly, bypassing the approval queue.
    ///
    /// Operator-on-the-host only; use `request-spawn` for an approval-gated
    /// spawn.
    Spawn {
        /// Agent name (e.g. `iris`).
        name: String,
    },
    /// Queue a spawn request for operator approval.
    RequestSpawn {
        /// Agent name.
        name: String,
    },
    /// Stop a managed container (graceful).
    Kill {
        /// Agent name.
        name: String,
    },
    /// Tear down a sub-agent container, keeping its state by default. No
    /// undo.
    Destroy {
        /// Agent name.
        name: String,
        /// Also wipe the agent's state dirs (config + creds + notes).
        #[arg(long)]
        purge: bool,
    },
    /// Apply pending config to a managed container.
    Rebuild {
        /// Agent name.
        name: String,
    },
    /// Move an agent in the topology tree — under a new parent, or to root.
    SetParent {
        /// Agent to move.
        child: String,
        /// New parent agent name. Mutually exclusive with `--root`.
        #[arg(long, conflicts_with = "root", required_unless_present = "root")]
        parent: Option<String>,
        /// Promote `child` to root (no parent).
        #[arg(long)]
        root: bool,
    },
    /// Declare an agent's CPU/memory limits, overriding the hive-wide defaults.
    ///
    /// Replaces the agent's whole override entry rather than merging into
    /// it: any limit you don't pass returns to the hive-wide default. To
    /// change one and keep the other, pass both.
    SetLimits {
        /// Agent name.
        name: String,
        /// systemd `CPUQuota=` value, e.g. `400%` (100% = one full core).
        #[arg(long, conflicts_with = "reset")]
        cpu_quota: Option<String>,
        /// systemd `MemoryMax=` value, e.g. `8G`, `50%`, or `infinity`.
        #[arg(long, conflicts_with = "reset")]
        memory_max: Option<String>,
        /// Drop all overrides — the agent returns to the hive-wide
        /// defaults. Required to clear limits, so that a `set-limits`
        /// with a forgotten value can't silently reset the agent.
        #[arg(
            long,
            conflicts_with_all = ["cpu_quota", "memory_max"],
            required_unless_present_any = ["cpu_quota", "memory_max"],
        )]
        reset: bool,
    },
}

/// Operator approval queue: list, approve, or deny pending requests.
#[derive(Subcommand)]
pub enum ApprovalsCmd {
    /// List pending approval requests submitted by agents.
    Pending,
    /// Approve a pending request by id; the action runs immediately.
    Approve {
        /// Approval id (from `hivectl approvals pending`).
        id: i64,
    },
    /// Deny a pending request by id.
    Deny {
        /// Approval id.
        id: i64,
    },
}

#[derive(Subcommand)]
pub enum SubvolCmd {
    /// Convert a plain-dir agent state root into a btrfs subvolume in
    /// place, so it gains snapshots and per-subvol usage/quota.
    ///
    /// Bounces the agent to migrate its state, so it requires `--yes`.
    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,
    },
    /// Read-only snapshots of an agent's state subvolume.
    Snapshot {
        #[command(subcommand)]
        cmd: SnapshotCmd,
    },
}

#[derive(Subcommand)]
pub enum SnapshotCmd {
    /// Create a read-only snapshot (agent must already be a subvolume).
    Create {
        /// Agent name (e.g. `damocles`, `iris`).
        name: String,
        /// Snapshot label. Mandatory, and must start with `hive-` — the
        /// prefix doubles as an allow-list hive-priv checks so only
        /// hivectl-issued snapshot names can reach the `btrfs subvolume
        /// snapshot` shellout.
        #[arg(long)]
        label: String,
    },
    /// Delete a snapshot created by `subvol snapshot create`.
    Delete {
        /// Agent name the snapshot belongs to.
        name: String,
        /// Snapshot label passed to `subvol snapshot create --label`.
        label: String,
    },
    /// Export a snapshot to a local file via `btrfs send` (the local-file
    /// half of inter-hive migration transport; the cross-hive `ssh ...
    /// btrfs receive` leg isn't wired up yet). Also useful standalone as a
    /// point-in-time backup: a full send with no `--parent` produces a
    /// self-contained archive of the snapshot.
    Send {
        /// Agent name the snapshot belongs to.
        name: String,
        /// Snapshot label passed to `subvol snapshot create --label`.
        label: String,
        /// Optional parent snapshot label for an incremental send
        /// (`btrfs send -p`) — must be an existing, older snapshot of the
        /// same agent. Omit for a full send.
        #[arg(long)]
        parent: Option<String>,
        /// Destination filename (not a path) under the migrate-staging
        /// dir. Refused if it already exists.
        #[arg(long)]
        dest: String,
    },
}