/**
 * Tests for `agenthub work` — the auto-claim primitive (TSK-0018).
 *   - immediate: claims an already-open addressed task without waiting (local).
 *   - wait: blocks on SSE until a matching task is created, then claims it.
 */
import { describe, it, expect, beforeEach, afterEach } from 'vitest';
import { mkdtempSync, rmSync } from 'fs';
import { tmpdir } from 'os';
import { join } from 'path';
import { init } from '../src/cli/commands/init.js';
import { workAgent } from '../src/cli/commands/work.js';
import { startServer } from '../src/server/index.js';
import { createTask, getTask } from '../src/core/services/taskService.js';
import type { Task } from '../src/core/schema.js';

describe('agenthub work — immediate claim (local)', () => {
  let cwd: string;

  beforeEach(() => {
    cwd = mkdtempSync(join(tmpdir(), 'ah-work-'));
    init(cwd, { projectName: 'work-test', yes: true });
  });

  afterEach(() => {
    rmSync(cwd, { recursive: true, force: true });
  });

  it('claims an already-open addressed task without waiting', async () => {
    const mine = createTask(cwd, { title: 'kimi: already open', role: 'implementer' });

    await workAgent({ projectCwd: cwd, agent: 'kimi', role: 'implementer', timeoutSec: 2 });

    const { task } = getTask(cwd, mine.id);
    expect(task.status).toBe('in_progress');
    expect(task.assignedTo).toBe('kimi');
  }, 4000);
});

describe('agenthub work — wait then auto-claim (server SSE)', () => {
  let cwd: string;
  let server: Awaited<ReturnType<typeof startServer>>;
  let nextServer: Awaited<ReturnType<typeof startServer>> | undefined;

  beforeEach(async () => {
    cwd = mkdtempSync(join(tmpdir(), 'ah-work-wait-'));
    init(cwd, { projectName: 'work-wait', yes: true });
    server = await startServer(cwd, { host: '127.0.0.1', port: 0 });
  });

  afterEach(async () => {
    await server.app.close().catch(() => undefined);
    await nextServer?.app.close().catch(() => undefined);
    rmSync(cwd, { recursive: true, force: true });
  });

  it('claims a task created AFTER work starts waiting', async () => {
    // Start waiting; do NOT await yet — no task is addressed to kimi initially.
    const workDone = workAgent({
      serverUrl: server.url,
      projectCwd: cwd,
      agent: 'kimi',
      role: 'implementer',
      timeoutSec: 3,
    });

    // Give work a moment to reach the SSE wait, then delegate a task to kimi.
    await new Promise((r) => setTimeout(r, 200));
    await fetch(`${server.url}/tasks`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ title: 'kimi: delegated after wait', role: 'implementer' }),
    });

    await workDone; // resolves once work has claimed the task (or on timeout)

    const tasks = (await fetch(`${server.url}/tasks`).then((r) => r.json())) as Task[];
    const mine = tasks.find((t) => (t.title ?? '').startsWith('kimi:'));
    expect(mine).toBeDefined();
    expect(mine?.status).toBe('in_progress');
    expect(mine?.assignedTo).toBe('kimi');
  }, 6000);

  it('reconnects after the SSE server moves and claims a later task', async () => {
    const workDone = workAgent({
      serverUrl: server.url,
      projectCwd: cwd,
      agent: 'kimi',
      role: 'implementer',
      timeoutSec: 6,
      reconnectBackoffMs: [50, 100],
      discoverServer: async () => nextServer?.url,
    });

    await new Promise((r) => setTimeout(r, 200));
    server.app.server.closeAllConnections?.();
    await server.app.close();
    nextServer = await startServer(cwd, { host: '127.0.0.1', port: 0 });

    await fetch(`${nextServer.url}/tasks`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ title: 'kimi: delegated after reconnect', role: 'implementer' }),
    });

    await workDone;

    const tasks = (await fetch(`${nextServer.url}/tasks`).then((r) => r.json())) as Task[];
    const mine = tasks.find((t) => (t.title ?? '').startsWith('kimi: delegated after reconnect'));
    expect(mine).toBeDefined();
    expect(mine?.status).toBe('in_progress');
    expect(mine?.assignedTo).toBe('kimi');
  }, 8000);

  // ── TSK-0119: after a review submit the re-armed work loop must stay reachable ──
  it('wakes on an architect follow-up message instead of going dormant', async () => {
    // The implementer re-armed `work` after submitting; no task is addressed yet.
    const workDone = workAgent({
      serverUrl: server.url,
      projectCwd: cwd,
      agent: 'kimi',
      role: 'implementer',
      timeoutSec: 4,
    });

    await new Promise((r) => setTimeout(r, 200));
    await fetch(`${server.url}/messages`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ from: 'claude', to: 'kimi', text: 'quick question about your submission' }),
    });

    await workDone; // resolves because the message woke the loop (not on timeout)

    // The loop drained + marked the message read — proving it woke on the message,
    // not that it merely timed out (a timeout would leave it delivered/unread).
    const inbox = (await fetch(`${server.url}/messages?agent=kimi`).then((r) => r.json())) as Array<{ text: string; status: string }>;
    const m = inbox.find((x) => x.text.includes('quick question'));
    expect(m).toBeDefined();
    expect(m?.status).toBe('read');
  }, 7000);

  it('wakes and re-claims when a submitted task is reopened', async () => {
    // Seed a task addressed to kimi, claim it, submit for review.
    await fetch(`${server.url}/tasks`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ title: 'kimi: build the widget', role: 'implementer' }),
    });
    await fetch(`${server.url}/tasks/TSK-0001`, {
      method: 'PATCH',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ status: 'in_progress', assignedTo: 'kimi' }),
    });
    await fetch(`${server.url}/tasks/TSK-0001`, {
      method: 'PATCH',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ status: 'review' }),
    });

    // Re-armed work loop: the task is in review, so nothing is addressed/open yet.
    const workDone = workAgent({
      serverUrl: server.url,
      projectCwd: cwd,
      agent: 'kimi',
      role: 'implementer',
      timeoutSec: 4,
    });

    await new Promise((r) => setTimeout(r, 200));
    // Architect reopens (send back to implementer).
    await fetch(`${server.url}/tasks/TSK-0001`, {
      method: 'PATCH',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ status: 'open' }),
    });

    await workDone;

    const { task } = getTask(cwd, 'TSK-0001');
    expect(task.status).toBe('in_progress');
    expect(task.assignedTo).toBe('kimi');
  }, 7000);
});