import { randomUUID } from "node:crypto";
import os from "node:os";
import path from "node:path";
import { afterAll, beforeAll, describe, expect, test } from "vitest";
import { WebSocket } from "ws";
import { emitAgentEvent } from "../infra/agent-events.js";
import {
  loadOrCreateDeviceIdentity,
  publicKeyRawBase64UrlFromPem,
  signDevicePayload,
} from "../infra/device-identity.js";
import { emitHeartbeatEvent } from "../infra/heartbeat-events.js";
import { GATEWAY_CLIENT_MODES, GATEWAY_CLIENT_NAMES } from "../utils/message-channel.js";
import {
  connectOk,
  getFreePort,
  installGatewayTestHooks,
  onceMessage,
  startGatewayServer,
  startServerWithClient,
} from "./test-helpers.js";
import { buildDeviceAuthPayload } from "./device-auth.js";

installGatewayTestHooks({ scope: "suite" });

let server: Awaited<ReturnType<typeof startGatewayServer>>;
let port = 0;
let previousToken: string | undefined;

beforeAll(async () => {
  previousToken = process.env.CLAWDBOT_GATEWAY_TOKEN;
  delete process.env.CLAWDBOT_GATEWAY_TOKEN;
  port = await getFreePort();
  server = await startGatewayServer(port);
});

afterAll(async () => {
  await server.close();
  if (previousToken === undefined) delete process.env.CLAWDBOT_GATEWAY_TOKEN;
  else process.env.CLAWDBOT_GATEWAY_TOKEN = previousToken;
});

const openClient = async (opts?: Parameters<typeof connectOk>[1]) => {
  const ws = new WebSocket(`ws://127.0.0.1:${port}`);
  await new Promise<void>((resolve) => ws.once("open", resolve));
  await connectOk(ws, opts);
  return ws;
};

describe("gateway server health/presence", () => {
  test("connect + health + presence + status succeed", { timeout: 60_000 }, async () => {
    const ws = await openClient();

    const healthP = onceMessage(ws, (o) => o.type === "res" && o.id === "health1");
    const statusP = onceMessage(ws, (o) => o.type === "res" && o.id === "status1");
    const presenceP = onceMessage(ws, (o) => o.type === "res" && o.id === "presence1");
    const channelsP = onceMessage(ws, (o) => o.type === "res" && o.id === "channels1");

    const sendReq = (id: string, method: string) =>
      ws.send(JSON.stringify({ type: "req", id, method }));
    sendReq("health1", "health");
    sendReq("status1", "status");
    sendReq("presence1", "system-presence");
    sendReq("channels1", "channels.status");

    const health = await healthP;
    const status = await statusP;
    const presence = await presenceP;
    const channels = await channelsP;
    expect(health.ok).toBe(true);
    expect(status.ok).toBe(true);
    expect(presence.ok).toBe(true);
    expect(channels.ok).toBe(true);
    expect(Array.isArray(presence.payload)).toBe(true);

    ws.close();
  });

  test("broadcasts heartbeat events and serves last-heartbeat", async () => {
    type HeartbeatPayload = {
      ts: number;
      status: string;
      to?: string;
      preview?: string;
      durationMs?: number;
      hasMedia?: boolean;
      reason?: string;
    };
    type EventFrame = {
      type: "event";
      event: string;
      payload?: HeartbeatPayload | null;
    };
    type ResFrame = {
      type: "res";
      id: string;
      ok: boolean;
      payload?: unknown;
    };

    const ws = await openClient();

    const waitHeartbeat = onceMessage<EventFrame>(
      ws,
      (o) => o.type === "event" && o.event === "heartbeat",
    );
    emitHeartbeatEvent({ status: "sent", to: "+123", preview: "ping" });
    const evt = await waitHeartbeat;
    expect(evt.payload?.status).toBe("sent");
    expect(typeof evt.payload?.ts).toBe("number");

    ws.send(
      JSON.stringify({
        type: "req",
        id: "hb-last",
        method: "last-heartbeat",
      }),
    );
    const last = await onceMessage<ResFrame>(ws, (o) => o.type === "res" && o.id === "hb-last");
    expect(last.ok).toBe(true);
    const lastPayload = last.payload as HeartbeatPayload | null | undefined;
    expect(lastPayload?.status).toBe("sent");
    expect(lastPayload?.ts).toBe(evt.payload?.ts);

    ws.send(
      JSON.stringify({
        type: "req",
        id: "hb-toggle-off",
        method: "set-heartbeats",
        params: { enabled: false },
      }),
    );
    const toggle = await onceMessage<ResFrame>(
      ws,
      (o) => o.type === "res" && o.id === "hb-toggle-off",
    );
    expect(toggle.ok).toBe(true);
    expect((toggle.payload as { enabled?: boolean } | undefined)?.enabled).toBe(false);

    ws.close();
  });

  test("presence events carry seq + stateVersion", { timeout: 8000 }, async () => {
    const ws = await openClient();

    const presenceEventP = onceMessage(ws, (o) => o.type === "event" && o.event === "presence");
    ws.send(
      JSON.stringify({
        type: "req",
        id: "evt-1",
        method: "system-event",
        params: { text: "note from test" },
      }),
    );

    const evt = await presenceEventP;
    expect(typeof evt.seq).toBe("number");
    expect(evt.stateVersion?.presence).toBeGreaterThan(0);
    expect(Array.isArray(evt.payload?.presence)).toBe(true);

    ws.close();
  });

  test("agent events stream with seq", { timeout: 8000 }, async () => {
    const ws = await openClient();

    const runId = randomUUID();
    const evtPromise = onceMessage(
      ws,
      (o) =>
        o.type === "event" &&
        o.event === "agent" &&
        o.payload?.runId === runId &&
        o.payload?.stream === "lifecycle",
    );
    emitAgentEvent({ runId, stream: "lifecycle", data: { msg: "hi" } });
    const evt = await evtPromise;
    expect(evt.payload.runId).toBe(runId);
    expect(typeof evt.seq).toBe("number");
    expect(evt.payload.data.msg).toBe("hi");

    ws.close();
  });

  test("shutdown event is broadcast on close", { timeout: 8000 }, async () => {
    const { server, ws } = await startServerWithClient();
    await connectOk(ws);

    const shutdownP = onceMessage(ws, (o) => o.type === "event" && o.event === "shutdown", 5000);
    await server.close();
    const evt = await shutdownP;
    expect(evt.payload?.reason).toBeDefined();
  });

  test("presence broadcast reaches multiple clients", { timeout: 8000 }, async () => {
    const clients = await Promise.all([openClient(), openClient(), openClient()]);
    const waits = clients.map((c) =>
      onceMessage(c, (o) => o.type === "event" && o.event === "presence"),
    );
    clients[0].send(
      JSON.stringify({
        type: "req",
        id: "broadcast",
        method: "system-event",
        params: { text: "fanout" },
      }),
    );
    const events = await Promise.all(waits);
    for (const evt of events) {
      expect(evt.payload?.presence?.length).toBeGreaterThan(0);
      expect(typeof evt.seq).toBe("number");
    }
    for (const c of clients) c.close();
  });

  test("presence includes client fingerprint", async () => {
    const identityPath = path.join(os.tmpdir(), `clawdbot-device-${randomUUID()}.json`);
    const identity = loadOrCreateDeviceIdentity(identityPath);
    const role = "operator";
    const scopes: string[] = [];
    const signedAtMs = Date.now();
    const payload = buildDeviceAuthPayload({
      deviceId: identity.deviceId,
      clientId: GATEWAY_CLIENT_NAMES.FINGERPRINT,
      clientMode: GATEWAY_CLIENT_MODES.UI,
      role,
      scopes,
      signedAtMs,
      token: null,
    });
    const ws = await openClient({
      role,
      scopes,
      client: {
        id: GATEWAY_CLIENT_NAMES.FINGERPRINT,
        version: "9.9.9",
        platform: "test",
        deviceFamily: "iPad",
        modelIdentifier: "iPad16,6",
        mode: GATEWAY_CLIENT_MODES.UI,
        instanceId: "abc",
      },
      device: {
        id: identity.deviceId,
        publicKey: publicKeyRawBase64UrlFromPem(identity.publicKeyPem),
        signature: signDevicePayload(identity.privateKeyPem, payload),
        signedAt: signedAtMs,
      },
    });

    const presenceP = onceMessage(ws, (o) => o.type === "res" && o.id === "fingerprint", 4000);
    ws.send(
      JSON.stringify({
        type: "req",
        id: "fingerprint",
        method: "system-presence",
      }),
    );

    const presenceRes = await presenceP;
    const entries = presenceRes.payload as Array<Record<string, unknown>>;
    const clientEntry = entries.find(
      (e) => e.host === GATEWAY_CLIENT_NAMES.FINGERPRINT && e.version === "9.9.9",
    );
    expect(clientEntry?.host).toBe(GATEWAY_CLIENT_NAMES.FINGERPRINT);
    expect(clientEntry?.version).toBe("9.9.9");
    expect(clientEntry?.mode).toBe("ui");
    expect(clientEntry?.deviceFamily).toBe("iPad");
    expect(clientEntry?.modelIdentifier).toBe("iPad16,6");

    ws.close();
  });

  test("cli connections are not tracked as instances", async () => {
    const cliId = `cli-${randomUUID()}`;
    const ws = await openClient({
      client: {
        id: GATEWAY_CLIENT_NAMES.CLI,
        version: "dev",
        platform: "test",
        mode: GATEWAY_CLIENT_MODES.CLI,
        instanceId: cliId,
      },
    });

    const presenceP = onceMessage(ws, (o) => o.type === "res" && o.id === "cli-presence", 4000);
    ws.send(
      JSON.stringify({
        type: "req",
        id: "cli-presence",
        method: "system-presence",
      }),
    );

    const presenceRes = await presenceP;
    const entries = presenceRes.payload as Array<Record<string, unknown>>;
    expect(entries.some((e) => e.instanceId === cliId)).toBe(false);

    ws.close();
  });
});