//! Remaining single-endpoint dashboard handlers: the operator inbox
//! (`Y3R C4LL`) + mark-all-read, operator compose (`op-send`),
//! spawn-request, hive-wide turn stats, container resources, and the
//! audit log.

use axum::{
    extract::{Form, Path as AxumPath, State},
    http::StatusCode,
    response::{IntoResponse, Response},
};
use serde::Deserialize;
use utoipa::{IntoParams, ToSchema};

use super::{AppState, Ident, error_response, scan_validated_paths};
use crate::container_stats::ContainerResource;
use crate::hive_stats::HiveStats;

/// Unread operator-directed messages for the dashboard's Y3R C4LL inbox.
/// Returns messages addressed to `"operator"` that haven't been
/// acked yet (the operator clears them via the existing
/// `POST /api/agent/operator/mark-all-read`). Newest-first; path-shaped
/// tokens are validated so the client renders file links like the
/// terminal does. Shape: `{ "messages": [{ id, from, body, at,
/// in_reply_to, file_refs }] }`.
#[utoipa::path(
    get,
    path = "/api/operator-inbox",
    responses(
        (status = 200, description = "unread operator-directed messages", body = serde_json::Value),
        (status = 500, description = "broker read failed"),
    ),
    tag = "misc_api"
)]
pub(super) async fn api_operator_inbox(State(state): State<AppState>) -> Response {
    const INBOX_LIMIT: u64 = 100;
    match state
        .coord
        .broker
        .unread_for_recipient("operator", INBOX_LIMIT)
    {
        Ok(messages) => {
            let items: Vec<serde_json::Value> = messages
                .into_iter()
                .filter_map(|m| {
                    let crate::broker::MessageEvent::Sent {
                        id,
                        from,
                        body,
                        at,
                        in_reply_to,
                        ..
                    } = m
                    else {
                        return None;
                    };
                    let file_refs = scan_validated_paths(&body);
                    Some(serde_json::json!({
                        "id": id,
                        "from": from,
                        "body": body,
                        "at": hive_sh4re::wire_time::from_secs(at),
                        "in_reply_to": in_reply_to,
                        "file_refs": file_refs,
                    }))
                })
                .collect();
            axum::Json(serde_json::json!({ "messages": items })).into_response()
        }
        Err(e) => error_response(&format!("operator-inbox failed: {e:#}")),
    }
}

#[derive(Deserialize, IntoParams)]
pub(super) struct StatsHiveQuery {
    window: Option<String>,
}

/// Hive-wide turn-stats rollup for the dashboard swarm-stats view.
/// Aggregates every agent's `hyperhive-turn-stats.sqlite` read-only
/// (skips missing/unreadable ones). Window defaults to `24h`.
#[utoipa::path(
    get,
    path = "/api/stats-hive",
    params(StatsHiveQuery),
    responses((status = 200, description = "hive-wide turn-stats rollup", body = HiveStats)),
    tag = "misc_api"
)]
pub(super) async fn api_stats_hive(
    State(state): State<AppState>,
    axum::extract::Query(q): axum::extract::Query<StatsHiveQuery>,
) -> Response {
    let window = crate::hive_stats::Window::parse(q.window.as_deref().unwrap_or("24h"));
    axum::Json(crate::hive_stats::hive_snapshot(
        window,
        &state.coord.model_prices,
    ))
    .into_response()
}

/// Live per-agent-container CPU + memory load from cgroup v2. Samples
/// CPU over a short interval (~200 ms), so this call briefly awaits.
#[utoipa::path(
    get,
    path = "/api/container-resources",
    responses((status = 200, description = "live per-container CPU + memory load", body = Vec<ContainerResource>)),
    tag = "misc_api"
)]
pub(super) async fn api_container_resources() -> Response {
    axum::Json(crate::container_stats::gather().await).into_response()
}

/// `GET /api/audit-log` — most-recent agent-initiated privileged-action
/// audit entries, newest first (server-clamped to 500). Backs the
/// operator dashboard's audit view. Returns
/// `{ "entries": [AuditEntry…], "total": N }` so the UI can show
/// "latest 500 of N" rather than silently capping. `ts_unix` is in
/// **seconds**.
#[utoipa::path(
    get,
    path = "/api/audit-log",
    responses(
        (status = 200, description = "recent audit entries + total count", body = serde_json::Value),
        (status = 500, description = "sqlite read failed"),
    ),
    tag = "misc_api"
)]
pub(super) async fn api_audit_log(State(state): State<AppState>) -> Response {
    const LIMIT: usize = 500;
    let entries = match state.coord.audit_log.list_recent(LIMIT) {
        Ok(rows) => rows,
        Err(e) => return error_response(&format!("audit-log: {e:#}")),
    };
    let total = match state.coord.audit_log.count_total() {
        Ok(n) => n,
        Err(e) => return error_response(&format!("audit-log count: {e:#}")),
    };
    axum::Json(serde_json::json!({ "entries": entries, "total": total })).into_response()
}

/// Operator-driven "clear this agent's inbox" — backs the side-panel
/// "mark all read" button. Marks every message addressed to the
/// agent as acked (backfilling `delivered_at` for any still-pending
/// rows so vacuum can collect them). Returns `{ "marked": N }` so the
/// frontend can show "cleared N messages" feedback without an extra
/// fetch.
#[utoipa::path(
    post,
    path = "/api/agent/{name}/mark-all-read",
    params(("name" = String, Path, description = "agent name")),
    responses(
        (status = 200, description = "count of messages marked read", body = serde_json::Value),
        (status = 400, description = "bad agent name"),
        (status = 500, description = "broker write failed"),
    ),
    tag = "misc_api"
)]
pub(super) async fn post_mark_all_read(
    State(state): State<AppState>,
    AxumPath(name): AxumPath<String>,
) -> Response {
    let name = match Ident::parse(&name) {
        Ok(n) => n,
        Err(reason) => {
            return (StatusCode::BAD_REQUEST, format!("bad agent name: {reason}")).into_response();
        }
    };
    match state.coord.broker.mark_all_read(name.as_str()) {
        Ok(n) => {
            tracing::info!(%name, marked = n, "operator marked all messages read");
            axum::Json(serde_json::json!({ "marked": n })).into_response()
        }
        Err(e) => error_response(&format!("mark-all-read {name} failed: {e:#}")),
    }
}

/// Operator-side compose form on the dashboard terminal. Drops a
/// message into the broker as `{from: "operator", to, body}`. Same
/// shape that per-agent web UIs use via `OperatorMsg`, but here the
/// operator picks the recipient explicitly with `@name`. No
/// validation that `to` resolves to a known agent — broker accepts
/// arbitrary recipients (and the agent's inbox grows whether or not
/// they exist, which is fine for spawn-then-greet flows).
#[derive(Deserialize, ToSchema)]
pub(super) struct OpSendForm {
    to: String,
    body: String,
}

/// `POST /api/op-send` — operator compose: drop a message into the
/// broker addressed to `to` (or `*` to broadcast).
#[utoipa::path(
    post,
    path = "/api/op-send",
    request_body(content = OpSendForm, content_type = "application/x-www-form-urlencoded"),
    responses(
        (status = 200, description = "message sent", body = String),
        (status = 500, description = "missing to/body, or the broker send failed"),
    ),
    tag = "misc_api"
)]
pub(super) async fn post_op_send(
    State(state): State<AppState>,
    Form(form): Form<OpSendForm>,
) -> Response {
    let to = form.to.trim().to_owned();
    let body = form.body.trim().to_owned();
    if to.is_empty() {
        return error_response("op-send: `to` required");
    }
    if body.is_empty() {
        return error_response("op-send: `body` required");
    }
    if to == "*" {
        let errors = state
            .coord
            .broadcast_send(hive_sh4re::OPERATOR_RECIPIENT, &body);
        if !errors.is_empty() {
            return error_response(&format!(
                "op-send broadcast partial fail: {}",
                errors.join("; ")
            ));
        }
    } else if let Err(e) = state.coord.broker.send(&hive_sh4re::Message {
        from: hive_sh4re::trusted_sender(hive_sh4re::OPERATOR_RECIPIENT),
        to: to.clone(),
        body,
        in_reply_to: None,
    }) {
        return error_response(&format!("op-send to {to} failed: {e:#}"));
    }
    // 200 instead of 303 → the client doesn't refetch /api/state. The
    // broker `send` already emitted a `MessageEvent` which the
    // dashboard channel forwarder mirrors as `DashboardEvent::Sent`,
    // and the page's terminal + inbox derive from that stream — so the
    // operator's send shows up the same way an agent's send does, with
    // no full-state refresh in between.
    (axum::http::StatusCode::OK, "ok").into_response()
}

#[derive(Deserialize, ToSchema)]
pub(super) struct RequestSpawnForm {
    name: String,
}

/// `POST /api/request-spawn` — queue a spawn approval for `name`.
#[utoipa::path(
    post,
    path = "/api/request-spawn",
    request_body(content = RequestSpawnForm, content_type = "application/x-www-form-urlencoded"),
    responses(
        (status = 200, description = "spawn approval queued", body = String),
        (status = 500, description = "missing name, or the approval submit failed"),
    ),
    tag = "misc_api"
)]
pub(super) async fn post_request_spawn(
    State(state): State<AppState>,
    Form(form): Form<RequestSpawnForm>,
) -> Response {
    let name = form.name.trim().to_owned();
    if name.is_empty() {
        return error_response("spawn: `name` required");
    }
    match state.coord.approvals.submit_kind(
        &name,
        hive_sh4re::ApprovalKind::Spawn,
        "",
        None,
        "operator",
        None,
    ) {
        Ok(id) => {
            tracing::info!(%id, %name, "operator: spawn approval queued via dashboard");
            // Phase 5b: notify the dashboard event channel so live
            // subscribers can append the row without a snapshot
            // refetch. Spawn approvals carry no sha.
            state
                .coord
                .emit_approval_added(crate::coordinator::ApprovalAdded {
                    id,
                    agent: &name,
                    approval_kind: "spawn",
                    sha_short: None,
                    description: None,
                    pr_number: None,
                });
            (StatusCode::OK, "ok").into_response()
        }
        Err(e) => error_response(&format!("request-spawn {name} failed: {e:#}")),
    }
}