import { describe, it, expect, beforeEach, afterEach } from 'vitest';
import { mkdtempSync, rmSync } from 'fs';
import { tmpdir } from 'os';
import { join } from 'path';
import { buildApp } from '../src/server/index.js';
import { init } from '../src/cli/commands/init.js';
import { resetPresence } from '../src/core/services/presenceService.js';
import { VERSION } from '../src/version.js';

interface HealthBody {
  status: string;
  version: string;
  startedAt: string;
  uptimeSec: number;
  counts: { tasks: number; open: number; inProgress: number; review: number; unreadMessages: number };
  agents: Array<{ name: string; role: string; state: string; taskId?: string; lastSeen?: string; lastSeenAgoSec?: number }>;
}

describe('GET /health + lastSeen stamping (TSK-0226)', () => {
  let cwd: string;
  let app: ReturnType<typeof buildApp>;

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

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

  const getHealth = async (): Promise<HealthBody> => {
    const res = await app.inject({ method: 'GET', url: '/health' });
    expect(res.statusCode).toBe(200);
    return JSON.parse(res.payload) as HealthBody;
  };

  it('returns the compact hub health shape', async () => {
    const h = await getHealth();
    expect(h.status).toBe('ok');
    expect(h.version).toBe(VERSION);
    expect(typeof h.uptimeSec).toBe('number');
    expect(h.uptimeSec).toBeGreaterThanOrEqual(0);
    expect(typeof h.startedAt).toBe('string');
    expect(h.counts).toMatchObject({ tasks: 0, open: 0, inProgress: 0, review: 0, unreadMessages: 0 });
    expect(Array.isArray(h.agents)).toBe(true);
    // The init roster seeds the default preferred agents.
    expect(h.agents.map((a) => a.name)).toContain('claude');
  });

  it('stamps lastSeen on announce → agent shows active', async () => {
    await app.inject({ method: 'POST', url: '/announce', payload: { agent: 'kimi', role: 'implementer' } });
    const h = await getHealth();
    const kimi = h.agents.find((a) => a.name === 'kimi');
    expect(kimi).toBeDefined();
    expect(kimi!.state).toBe('active');
    expect(typeof kimi!.lastSeen).toBe('string');
    expect(kimi!.lastSeenAgoSec).toBeLessThan(120);
  });

  it('stamps lastSeen on message send and counts the unread message', async () => {
    await app.inject({ method: 'POST', url: '/messages', payload: { from: 'codex', to: 'claude', text: 'ping' } });
    const h = await getHealth();
    const codex = h.agents.find((a) => a.name === 'codex');
    expect(codex!.state).toBe('active');
    expect(h.counts.unreadMessages).toBe(1);
  });

  it('stamps lastSeen on claim → agent shows busy-on-TSK-X', async () => {
    await app.inject({ method: 'POST', url: '/tasks', payload: { title: 'Work', role: 'implementer', assignedTo: 'codex' } });
    await app.inject({ method: 'PATCH', url: '/tasks/TSK-0001', payload: { status: 'in_progress', assignedTo: 'codex' } });
    const h = await getHealth();
    const codex = h.agents.find((a) => a.name === 'codex');
    expect(codex!.state).toBe('busy');
    expect(codex!.taskId).toBe('TSK-0001');
    expect(h.counts.inProgress).toBe(1);
  });

  it('stamps lastSeen on task-log lines and review submissions', async () => {
    await app.inject({ method: 'POST', url: '/tasks', payload: { title: 'Work', role: 'implementer', assignedTo: 'kimi' } });
    await app.inject({ method: 'PATCH', url: '/tasks/TSK-0001', payload: { status: 'in_progress', assignedTo: 'kimi' } });
    await app.inject({ method: 'POST', url: '/tasks/TSK-0001/log', payload: { text: 'working', agent: 'kimi' } });
    await app.inject({ method: 'PATCH', url: '/tasks/TSK-0001', payload: { status: 'review' } });
    const h = await getHealth();
    const kimi = h.agents.find((a) => a.name === 'kimi');
    expect(kimi!.state).toBe('active');
    expect(kimi!.lastSeen).toBeDefined();
    expect(h.counts.review).toBe(1);
  });
});