//! 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 matrix container, plus future \
recovery / debugging verbs.\
"
)]
pub struct Cli {
    /// Path to the hive-c0re host admin socket, used by the daemon-assisted
    /// verbs (`agent`, `list-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 {
    /// Reconcile an agent's config between this hive and the forge.
    ///
    /// A human's first SSO login to the forge makes their forge
    /// account.
    Forge {
        #[command(subcommand)]
        cmd: ForgeCmd,
    },
    /// matrix-tuwunel invites.
    ///
    /// Manual invites into the hive Space and its rooms; c0re's periodic
    /// matrix sweep provisions the Space, the chat room and the agents'
    /// invites on its own.
    Matrix {
        #[command(subcommand)]
        cmd: MatrixCmd,
    },
    /// Lifecycle actions on ONE managed agent container. Needs the
    /// hive-c0re daemon running.
    ///
    /// Everything here targets a single named agent (`hivectl agent foo
    /// restart`, `hivectl agent foo choom`, …) — anything that acts
    /// hive-wide lives at the top level instead (`list-agents`,
    /// `restart`/`stop`/`start` with a scope, `quota-enable`).
    Agent {
        /// Agent name (for example `damocles`, `iris`).
        name: String,
        #[command(subcommand)]
        cmd: AgentCmd,
    },
    /// Show all managed agents with their status and technical state.
    ///
    /// Global — not scoped to one agent, so it lives at the top level
    /// rather than under `hivectl agent <name>`. Needs the hive-c0re
    /// daemon running.
    ListAgents {
        /// Emit the raw JSON rows instead of the padded table (for
        /// scripting). The table is the default human-readable shape.
        #[arg(long)]
        json: bool,
    },
    /// Enable btrfs qgroup accounting on the agent-state filesystem.
    ///
    /// Global one-shot toggle (not per-agent), hence top-level rather than
    /// under `hivectl agent <name>`. Idempotent — safe to re-run. Once
    /// enabled, `hivectl agent <name> quota show`/`quota set` work.
    QuotaEnable,
    /// 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 (for example `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>,
    },
    /// Stop containers hive-wide in one operator action.
    ///
    /// Bare `hivectl stop` stops every agent and the gateway; scope flags
    /// narrow it to specific sub-agents or the gateway. The swarm's forge
    /// and matrix are never in scope: systemd on the services host runs
    /// them.
    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: it signals the harness, which runs one stop-checkpoint
        /// turn to flush durable `/state` and drains, then the DAG stops
        /// the container (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 hivectl queues the stop DAGs 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. The swarm's forge and matrix are never in scope.
    Start {
        #[command(flatten)]
        scope: ScopeArgs,
        /// Return immediately after hivectl queues the start DAGs 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.
    /// The swarm's forge and matrix are never in scope.
    Restart {
        #[command(flatten)]
        scope: ScopeArgs,
        /// Gracefully quiesce each agent on the stop half (see
        /// `stop --graceful`). Applies to agents only.
        #[arg(long)]
        graceful: bool,
    },
    /// 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://<hive>.hives.<swarm domain>/`).
    Home,
    /// The forge (Forgejo) web UI.
    Forge,
    /// The matrix GUI (fluffychat).
    Matrix,
}

/// Shared scope flags for `hivectl stop` / `start` / `restart`. With no
/// flag set the verb targets **everything** (all sub-agents + the
/// gateway). Setting any flag restricts to the selected classes,
/// additively.
#[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 gateway (`hive-gateway`) — nginx on the host, not a container.
    #[arg(long)]
    gateway: 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(),
            gateway: self.gateway,
        }
    }
}

#[derive(Subcommand)]
pub enum ForgeCmd {
    /// 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`
    /// isn't supported yet. With no `--from`, prompts for the direction.
    ReconcileConfig {
        /// Agent whose config branches to reconcile.
        agent: String,
        /// Which side to reconcile from. Omit it and hivectl prompts you 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 {
    /// 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 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 (for example `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 (its `swarm.hives` entry's `domain`)
        domain: String,
        /// Peer's WireGuard public key (from its `hivectl wg init`).
        #[arg(long)]
        pubkey: String,
        /// Peer's mesh address (for example `10.42.0.2/32`).
        #[arg(long)]
        address: String,
        /// Peer's `host:port` endpoint (omit for a peer that only dials out,
        /// for example one behind NAT — it must set an endpoint pointing back here).
        #[arg(long)]
        endpoint: Option<String>,
    },
    /// Show the live mesh interface state.
    Status,
}

// 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` connects to it.
pub(crate) use hive_host_sock::HOST_SOCKET as DEFAULT_HOST_SOCKET;

/// Verbs under `hivectl agent <name> <verb>` — every one of these targets
/// the single agent named on the parent command, so none of them carry
/// their own `name` field.
#[derive(Subcommand)]
pub enum AgentCmd {
    /// Stop and start this agent container without rebuilding config.
    Restart {
        /// Return immediately after hivectl queues the restart DAG.
        #[arg(long)]
        no_wait: bool,
    },
    /// Park this 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 {
        /// Return immediately after hivectl queues the pause DAG instead of
        /// waiting for the harness to acknowledge it.
        #[arg(long)]
        no_wait: bool,
    },
    /// Resume this paused agent — it drains whatever queued up while parked.
    Resume,
    /// Start this EXISTING agent container. Fails immediately if `name`
    /// has no config/topology entry at all — it never attempts
    /// first-time creation, which is swarm-level (`swarmctl agent create`).
    Start {
        /// Start (or leave) the agent paused: if it's currently down, hivectl
        /// writes the pause marker before the container boots, so it comes
        /// up paused instead of driving turns immediately. If it's already
        /// running, this pauses it in place and doesn't attempt a
        /// (re)start.
        #[arg(long)]
        paused: bool,
    },
    /// Gracefully stop this agent container: signal → drain → reconcile.
    /// Never escalates to a hard kill — use `kill` for that.
    Stop,
    /// Hard-stop this managed container.
    Kill,
    /// Tear down this sub-agent container, keeping its state by default.
    /// No undo.
    Destroy {
        /// Also wipe the agent's state dirs (config + creds + notes).
        #[arg(long)]
        purge: bool,
    },
    /// Apply pending config to this managed container.
    Rebuild,
    /// Open an interactive Claude session inside this agent's container.
    ///
    /// A fresh session by default, or resume a prior one. Requires root
    /// or `hive-admin` group membership, plus a running container.
    Choom {
        /// 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.
        /// Requires a value.
        #[arg(long = "resume", value_name = "SESSION")]
        resume_session: Option<String>,
    },
    /// Follow this agent's live turn/tool-call event stream from the CLI.
    ///
    /// Prints one compact line per event as they happen. `Ctrl-C` to stop.
    /// Requires the agent to be running.
    Watch,
    /// This agent's disk accounting + optional quota via btrfs qgroups.
    ///
    /// Needs `hivectl quota-enable` run once hive-wide first. No-op on
    /// non-btrfs hosts.
    Quota {
        #[command(subcommand)]
        cmd: AgentQuotaCmd,
    },
    /// btrfs subvolume management for this agent's state dir.
    ///
    /// 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,
    },
}

#[derive(Subcommand)]
pub enum AgentQuotaCmd {
    /// Report this agent's disk usage from btrfs qgroups.
    Show,
    /// Set or clear this agent's disk-usage quota.
    Set {
        /// Size cap (`5G`, `500M`, `1073741824`) or `none` to clear.
        size: String,
    },
}

#[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 {
        /// 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 this 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 {
        /// 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 {
        /// 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 the inter-hive migration transport (`push`
    /// is the network half). Also useful standalone as a point-in-time
    /// backup: a full send with no `--parent` produces a
    /// self-contained archive of the snapshot.
    Send {
        /// 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,
    },
    /// Stream a snapshot to the swarm's snapshot store over the
    /// WireGuard mesh — the network half of the migration transport.
    ///
    /// Stages nothing locally: `btrfs send` writes straight into the
    /// connection, so a multi-gigabyte agent needs no scratch space on
    /// this host. The mesh is the authentication (cryptokey routing
    /// binds the sender's address to its key), so there is no credential
    /// to pass here.
    ///
    /// No destination argument exists: a swarm has one store, read
    /// from `services.hyperhive.swarm.snapshotStore`.
    Push {
        /// 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, and must already be present on the receiver.
        /// Omit for a full send.
        #[arg(long)]
        parent: Option<String>,
    },
}