//! Host admin socket wire types (`/run/hyperhive/host.sock`).
//!
//! The host-control protocol spoken between `hivectl` and the `hive-c0re`
//! daemon. Re-homed out of `hive-sh4re` so a standalone `hivectl` can depend
//! on just this protocol crate instead of the whole daemon crate. The shared
//! payload types it references (`Approval`, `AgentStatusRow`, `jobs::DagView`)
//! stay in `hive-sh4re`.

use hive_sh4re::{AgentStatusRow, Approval, jobs};
use serde::{Deserialize, Serialize};

/// Requests on the host admin socket.
///
/// Wire format: one JSON object per line.
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(tag = "cmd", rename_all = "snake_case")]
pub enum HostRequest {
    /// Create and start a sub-agent container directly, bypassing the
    /// approval queue. Privileged-context only. See
    /// `docs/approvals.md::Approval kinds (wire shapes)`.
    Spawn { name: String },
    /// Submit a spawn request for the operator to approve. See
    /// `docs/approvals.md::Approval kinds (wire shapes)` (`Spawn`).
    RequestSpawn { name: String },
    /// Stop a managed container (graceful).
    Kill { name: String },
    /// Tear down a sub-agent container, optionally purging state.
    /// See `docs/approvals.md::Destroy semantics`.
    Destroy {
        name: String,
        #[serde(default)]
        purge: bool,
    },
    /// Stop and start a managed container without rebuilding config.
    /// For "kick the container" operations that don't touch the flake or
    /// nspawn flags. Mirrors `lifecycle::restart` (kill + start).
    Restart { name: String },
    /// Stop and restart all managed containers in sequence. Convenience
    /// wrapper for `hivectl agents restart-all`; iterates the live
    /// container list and restarts each one.
    RestartAll,
    /// Restart containers hive-wide (`hivectl restart`), scoped like
    /// `Stop`/`Start`. Each targeted agent rides exactly one DAG server-side
    /// (the `Restart` template, hard stop + reconcile — or, when `graceful`
    /// is set, a submitted graceful-stop DAG the server itself waits out
    /// before submitting the start DAG) rather than the old client-side
    /// stop-then-start composition: a dropped `hivectl` connection mid-way
    /// used to leave the agent stopped with no automatic follow-up, since
    /// nothing durable remembered "finish the restart" once the CLI process
    /// was gone. Infra containers have no lease/DAG and restart
    /// synchronously (stop then start), same as before. Scope semantics
    /// match `Stop`/`Start` (all-false = everything).
    RestartScoped {
        #[serde(default)]
        scope: LifecycleScope,
        #[serde(default)]
        graceful: bool,
    },
    /// Apply pending config to a managed container.
    Rebuild { name: String },
    /// List managed containers.
    List,
    /// List managed agents with their full status + technical state
    /// (running / needs-login / needs-update / deployed sha / parent /
    /// pending reminders) — the `hivectl agents list` roster view.
    /// Reuses the dashboard's per-agent `ContainerView` aggregation.
    AgentStatus,
    /// Report this hive's canonical DNS domain
    /// (`services.hyperhive.domain`) plus the browser-facing home /
    /// forge / matrix URLs, daemon-sourced so custom forge/matrix
    /// domains resolve correctly. Each URL is `None` when its subsystem
    /// is unreachable from a browser (e.g. forge not behind the gateway,
    /// matrix GUI disabled). Backs `hivectl open` + the federation
    /// peer-config block (which reads the bare `domain`).
    Urls,
    /// Fetch one job-queue DAG (plus its live fan-out children, linked
    /// via `parent_id`) by id — the polling surface behind `hivectl`'s
    /// wait/progress loop. Result: [`HostResponse::dags`].
    QueueDag { id: u64 },
    /// List pending approval requests.
    Pending,
    /// Approve a pending request by id; the action runs immediately.
    Approve { id: i64 },
    /// Deny a pending request by id.
    Deny { id: i64 },
    /// Move an agent in the topology tree. `new_parent = None`
    /// promotes the agent to root, `Some(name)` sets a new parent.
    /// Validation rules + bind-mount caveat documented in
    /// `docs/agent-hierarchy.md::Current state`.
    SetParent {
        child: String,
        new_parent: Option<String>,
    },
    /// Stop managed containers hive-wide in one operator action
    /// (`hivectl stop`): agents plus the selected infra containers. `scope`
    /// selects which classes; an all-false scope means **everything** (the
    /// bare `hivectl stop`). `graceful` runs the per-agent quiesce (graceful
    /// agent stop, issue tracker `graceful agent stop`) instead of a hard
    /// stop. Agents stop via the lifecycle path; infra containers via the
    /// host `container@<name>` units.
    Stop {
        #[serde(default)]
        scope: LifecycleScope,
        #[serde(default)]
        graceful: bool,
    },
    /// Start managed containers hive-wide — the inverse of `Stop`
    /// (`hivectl start`). Same `scope` semantics (all-false = everything);
    /// no graceful flag (start is unconditional).
    Start {
        #[serde(default)]
        scope: LifecycleScope,
    },
    /// Create or refresh a matrix account + access token for `name`.
    /// The daemon runs the provisioning (it holds the register + admin
    /// tokens and the matrix creds dir) and returns the operator-facing
    /// results (persisted-token path for agents, or the freshly-minted
    /// token + password for non-agent accounts) in
    /// [`HostResponse::messages`]. `password` is resolved by the client
    /// (inline flag or stdin) and `None` requests a random throwaway.
    MatrixCreateUser {
        name: String,
        #[serde(default)]
        password: Option<String>,
    },
    /// Provision (or re-provision) the hive system admin matrix account.
    /// Daemon-side equivalent of `hivectl matrix sync-admin`.
    MatrixSyncAdmin,
    /// Promote a matrix user to homeserver admin via the admin API.
    /// Uses the daemon's system admin token; `server_name` is discovered
    /// from the running homeserver.
    MatrixPromoteUser { name: String },
    /// Reset a matrix user's password via the admin API and persist the
    /// new password to the matrix creds dir so a later token mint can
    /// re-login. Returns the outcome in [`HostResponse::messages`].
    MatrixResetPassword { name: String },
    /// Invite a matrix user to the hive Space (default) or a specific
    /// `room`. Uses the daemon's admin token; idempotent
    /// (already-member / already-invited is a no-op).
    MatrixInvite {
        user: String,
        #[serde(default)]
        room: Option<String>,
    },
}

/// Selects which container classes a hive-wide [`HostRequest::Stop`] /
/// [`HostRequest::Start`] touches. An all-false scope means **everything**
/// (the bare `hivectl stop` / `start`); set individual fields to restrict
/// (e.g. only `agents` → just the sub-agent containers). `agents` covers
/// every managed sub-agent container; the rest are the named infra
/// containers (`hive-ci`, `hive-forge`, `hive-gateway`, `hive-matrix`).
//
// A flat bag of independent flag toggles — one bool per selectable
// container class — is exactly the right shape here: each maps 1:1 to a
// `hivectl` `--ci` / `--forge` / `--gateway` / `--matrix` flag, and they're
// orthogonal (any subset is valid), so a state machine or two-variant enums
// would only obscure the mapping. Hence the `struct_excessive_bools` allow.
#[allow(clippy::struct_excessive_bools)]
#[derive(Debug, Clone, Default, Serialize, Deserialize)]
pub struct LifecycleScope {
    /// All sub-agent containers (`--agents`).
    #[serde(default)]
    pub agents: bool,
    /// Specific sub-agents by logical name (`--agent <name>`, repeatable).
    /// Additive with the rest of the scope; redundant when `agents` is set
    /// (which already covers every sub-agent).
    #[serde(default)]
    pub agent_names: Vec<String>,
    #[serde(default)]
    pub ci: bool,
    #[serde(default)]
    pub forge: bool,
    #[serde(default)]
    pub gateway: bool,
    #[serde(default)]
    pub matrix: bool,
}

impl LifecycleScope {
    /// True when nothing is explicitly selected — interpreted as "all
    /// classes" (the bare `hivectl stop` / `start` with no scope flags).
    pub fn is_everything(&self) -> bool {
        !(self.agents || self.ci || self.forge || self.gateway || self.matrix)
            && self.agent_names.is_empty()
    }
}

/// This hive's canonical domain plus the browser-facing URLs for its
/// web surfaces — the `Urls` request result. Every field is `None` when
/// the corresponding surface can't be reached from a browser (domain
/// unset, forge not behind the gateway, matrix GUI disabled), so the CLI
/// can give a precise hint instead of opening a dead link.
#[derive(Debug, Clone, Default, Serialize, Deserialize)]
pub struct HiveUrls {
    /// Canonical hive domain (`services.hyperhive.domain`).
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub domain: Option<String>,
    /// Operator dashboard root (`https://<domain>/`).
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub home: Option<String>,
    /// Forge browser URL (`HIVE_FORGE_PUBLIC_URL`) — only the
    /// behind-gateway public URL; `None` on direct-port forge deploys.
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub forge: Option<String>,
    /// Matrix GUI (fluffychat) browser URL — `None` when the matrix GUI
    /// is disabled.
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub matrix: Option<String>,
}

#[derive(Debug, Clone, Default, Serialize, Deserialize)]
pub struct HostResponse {
    pub ok: bool,
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub error: Option<String>,
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub agents: Option<Vec<String>>,
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub approvals: Option<Vec<Approval>>,
    /// `Urls` result — this hive's domain plus the browser-facing
    /// home / forge / matrix URLs. `None` for every other request kind.
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub urls: Option<HiveUrls>,
    /// `AgentStatus` result — one row per managed agent with its
    /// running/health flags + technical state. `None` for every other
    /// request kind.
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub agent_statuses: Option<Vec<AgentStatusRow>>,
    /// Ids of the job-queue DAGs this request submitted (rebuild /
    /// restart / power ops). Clients poll them via
    /// [`HostRequest::QueueDag`]; `None` for non-submitting requests.
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub queued_dags: Option<Vec<u64>>,
    /// `QueueDag` result — the requested DAG followed by its live
    /// fan-out children ([`jobs::DagView`]). Empty when the DAG has
    /// been evicted from the queue's history tail.
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub dags: Option<Vec<jobs::DagView>>,
    /// Free-form operator-facing output lines the client prints verbatim
    /// (one per line). Carries results a request produced daemon-side that
    /// have no structured home — e.g. a freshly-minted matrix token, a
    /// reset password, or an invited room id from the `Matrix*` requests.
    /// Empty for requests that produce no such output.
    #[serde(default, skip_serializing_if = "Vec::is_empty")]
    pub messages: Vec<String>,
}

impl HostResponse {
    #[must_use]
    pub fn success() -> Self {
        Self {
            ok: true,
            ..Self::default()
        }
    }

    #[must_use]
    pub fn error(message: impl Into<String>) -> Self {
        Self {
            ok: false,
            error: Some(message.into()),
            ..Self::default()
        }
    }

    #[must_use]
    pub fn list(agents: Vec<String>) -> Self {
        Self {
            ok: true,
            agents: Some(agents),
            ..Self::default()
        }
    }

    #[must_use]
    pub fn pending(approvals: Vec<Approval>) -> Self {
        Self {
            ok: true,
            approvals: Some(approvals),
            ..Self::default()
        }
    }

    /// `Urls` result — this hive's domain + browser-facing web URLs.
    #[must_use]
    pub fn urls(urls: HiveUrls) -> Self {
        Self {
            ok: true,
            urls: Some(urls),
            ..Self::default()
        }
    }

    /// `AgentStatus` result — one row per managed agent.
    #[must_use]
    pub fn agent_statuses(rows: Vec<AgentStatusRow>) -> Self {
        Self {
            ok: true,
            agent_statuses: Some(rows),
            ..Self::default()
        }
    }

    /// A request that submitted job-queue DAGs — carries their ids for
    /// the client's wait/progress loop.
    #[must_use]
    pub fn queued(ids: Vec<u64>) -> Self {
        Self {
            ok: true,
            queued_dags: Some(ids),
            ..Self::default()
        }
    }

    /// `QueueDag` result — the polled DAG + its live children.
    #[must_use]
    pub fn dags(dags: Vec<jobs::DagView>) -> Self {
        Self {
            ok: true,
            dags: Some(dags),
            ..Self::default()
        }
    }

    /// A success carrying operator-facing output lines the client prints
    /// verbatim — the result shape for the `Matrix*` provisioning requests.
    #[must_use]
    pub fn messages(messages: Vec<String>) -> Self {
        Self {
            ok: true,
            messages,
            ..Self::default()
        }
    }
}