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';

describe('server routes', () => {
  let cwd: string;
  let app: ReturnType<typeof buildApp>;

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

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

  it('creates a task via POST /tasks', async () => {
    const res = await app.inject({
      method: 'POST',
      url: '/tasks',
      payload: { title: 'API task', role: 'implementer' },
    });
    expect(res.statusCode).toBe(200);
    const task = JSON.parse(res.payload);
    expect(task.id).toBe('TSK-0001');
  });

  it('lists tasks via GET /tasks', async () => {
    await app.inject({ method: 'POST', url: '/tasks', payload: { title: 'A', role: 'implementer' } });
    const res = await app.inject({ method: 'GET', url: '/tasks' });
    expect(JSON.parse(res.payload)).toHaveLength(1);
  });

  it('returns 404 for unknown task', async () => {
    const res = await app.inject({ method: 'GET', url: '/tasks/TSK-9999' });
    expect(res.statusCode).toBe(404);
  });

  it('returns 400 for unsupported patch', async () => {
    await app.inject({ method: 'POST', url: '/tasks', payload: { title: 'A', role: 'implementer' } });
    const res = await app.inject({ method: 'PATCH', url: '/tasks/TSK-0001', payload: { status: 'unknown' } });
    expect(res.statusCode).toBe(400);
  });

  it('returns 400 when claiming without assignedTo', async () => {
    await app.inject({ method: 'POST', url: '/tasks', payload: { title: 'A', role: 'implementer' } });
    const res = await app.inject({ method: 'PATCH', url: '/tasks/TSK-0001', payload: { status: 'in_progress' } });
    expect(res.statusCode).toBe(400);
  });

  it('PATCH /tasks/:id → review', async () => {
    await app.inject({ method: 'POST', url: '/tasks', payload: { title: 'A', role: 'implementer' } });
    const res = await app.inject({ method: 'PATCH', url: '/tasks/TSK-0001', payload: { status: 'review' } });
    expect(res.statusCode).toBe(200);
    expect(JSON.parse(res.payload).status).toBe('review');
  });

  it('PATCH /tasks/:id → cancelled', async () => {
    await app.inject({ method: 'POST', url: '/tasks', payload: { title: 'A', role: 'implementer' } });
    const res = await app.inject({ method: 'PATCH', url: '/tasks/TSK-0001', payload: { status: 'cancelled' } });
    expect(res.statusCode).toBe(200);
    expect(JSON.parse(res.payload).status).toBe('cancelled');
  });

  it('PATCH /tasks/:id → open (reopen)', async () => {
    await app.inject({ method: 'POST', url: '/tasks', payload: { title: 'A', role: 'implementer' } });
    // First cancel it, then reopen
    await app.inject({ method: 'PATCH', url: '/tasks/TSK-0001', payload: { status: 'cancelled' } });
    const res = await app.inject({ method: 'PATCH', url: '/tasks/TSK-0001', payload: { status: 'open' } });
    expect(res.statusCode).toBe(200);
    expect(JSON.parse(res.payload).status).toBe('open');
  });

  it('review and cancelled tasks appear in GET /tasks list', async () => {
    await app.inject({ method: 'POST', url: '/tasks', payload: { title: 'A', role: 'implementer' } });
    await app.inject({ method: 'POST', url: '/tasks', payload: { title: 'B', role: 'implementer' } });
    await app.inject({ method: 'PATCH', url: '/tasks/TSK-0001', payload: { status: 'review' } });
    await app.inject({ method: 'PATCH', url: '/tasks/TSK-0002', payload: { status: 'cancelled' } });

    const allRes = await app.inject({ method: 'GET', url: '/tasks' });
    const all = JSON.parse(allRes.payload) as Array<{ status: string }>;
    const statuses = all.map((t) => t.status);
    expect(statuses).toContain('review');
    expect(statuses).toContain('cancelled');
  });

  it('updates status via POST /status/update', async () => {
    await app.inject({ method: 'POST', url: '/tasks', payload: { title: 'A', role: 'implementer' } });
    const res = await app.inject({ method: 'POST', url: '/status/update' });
    expect(res.statusCode).toBe(200);
    expect(JSON.parse(res.payload).body).toContain('Active tasks: 1');
  });

  it('searches memory via GET /memory/search', async () => {
    await app.inject({ method: 'POST', url: '/memory', payload: { title: 'DNS cache', category: 'technical', content: 'Use TTL' } });
    const res = await app.inject({ method: 'GET', url: '/memory/search?q=TTL' });
    expect(res.statusCode).toBe(200);
    expect(JSON.parse(res.payload)).toHaveLength(1);
  });

  it('serves the task board as HTML via GET /board', async () => {
    const res = await app.inject({ method: 'GET', url: '/board' });
    expect(res.statusCode).toBe(200);
    expect(res.headers['content-type']).toContain('text/html');

    const html = res.payload;
    expect(html).toContain('<title>AgentHub Board</title>');
    // All five status columns are present in the static markup.
    for (const col of ['open', 'in_progress', 'review', 'done', 'cancelled']) {
      expect(html).toContain(`data-column="${col}"`);
    }
    // Handoffs + decisions panels and the polling logic are wired in.
    expect(html).toContain('Handoffs');
    expect(html).toContain('Decisions');
    expect(html).toContain("getJSON('/tasks')");
    expect(html).toContain('setInterval(refresh');
  });

  // ── Activity timeline endpoint ─────────────────────────────────────────
  it('GET /tasks/:id/activity returns 404 for unknown task', async () => {
    const res = await app.inject({ method: 'GET', url: '/tasks/TSK-9999/activity' });
    expect(res.statusCode).toBe(404);
  });

  it('GET /tasks/:id/activity returns a created event', async () => {
    await app.inject({ method: 'POST', url: '/tasks', payload: { title: 'Auth', role: 'implementer' } });
    const res = await app.inject({ method: 'GET', url: '/tasks/TSK-0001/activity' });
    expect(res.statusCode).toBe(200);
    const items = JSON.parse(res.payload) as Array<{ kind: string; summary: string }>;
    expect(items.some((i) => i.kind === 'created')).toBe(true);
  });

  it('GET /tasks/:id/activity includes handoff events linked by taskId', async () => {
    await app.inject({ method: 'POST', url: '/tasks', payload: { title: 'Auth', role: 'implementer' } });
    await app.inject({
      method: 'POST',
      url: '/handoffs',
      payload: { fromRole: 'architect', toRole: 'implementer', taskId: 'TSK-0001', summary: 'Design done' },
    });
    const res = await app.inject({ method: 'GET', url: '/tasks/TSK-0001/activity' });
    const items = JSON.parse(res.payload) as Array<{ kind: string; summary: string }>;
    const handoff = items.find((i) => i.kind === 'handoff');
    expect(handoff).toBeDefined();
    expect(handoff!.summary).toBe('Design done');
  });

  it('GET /tasks/:id/activity includes memory result events linked by relatedTasks', async () => {
    await app.inject({ method: 'POST', url: '/tasks', payload: { title: 'DNS task', role: 'implementer' } });
    await app.inject({
      method: 'POST',
      url: '/memory',
      payload: { title: 'TTL insight', category: 'technical', content: 'Use 300s', relatedTasks: ['TSK-0001'] },
    });
    const res = await app.inject({ method: 'GET', url: '/tasks/TSK-0001/activity' });
    const items = JSON.parse(res.payload) as Array<{ kind: string; summary: string }>;
    const result = items.find((i) => i.kind === 'result');
    expect(result).toBeDefined();
    expect(result!.summary).toBe('TTL insight');
  });

  it('GET /tasks/:id/activity includes tokens/duration from done metadata', async () => {
    await app.inject({ method: 'POST', url: '/tasks', payload: { title: 'Work', role: 'implementer' } });
    await app.inject({
      method: 'PATCH',
      url: '/tasks/TSK-0001',
      payload: { status: 'done', doneTokens: 5000, doneDuration: 60000, doneBy: 'claude' },
    });
    const res = await app.inject({ method: 'GET', url: '/tasks/TSK-0001/activity' });
    const items = JSON.parse(res.payload) as Array<{ kind: string; meta?: Record<string, unknown> }>;
    const status = items.find((i) => i.kind === 'status');
    expect(status).toBeDefined();
    expect(status!.meta?.tokens).toBe(5000);
    expect(status!.meta?.duration).toBe(60000);
    expect(status!.meta?.by).toBe('claude');
  });

  it('board HTML contains the who-arrow rendering logic', async () => {
    const res = await app.inject({ method: 'GET', url: '/board' });
    const html = res.payload;
    // The handoffRoute helper and the &rarr; arrow must be present
    expect(html).toContain('handoffRoute');
    expect(html).toContain('&rarr;');
    // The who-cell class must be used in renderHandoffs
    expect(html).toContain('who-cell');
  });

  it('board HTML keeps cards slim and links to task detail pages', async () => {
    const res = await app.inject({ method: 'GET', url: '/board' });
    const html = res.payload;
    // Cards carry data-id for realtime refresh bookkeeping and link to detail pages.
    expect(html).toContain('data-id');
    expect(html).toContain('href="/tasks/');
    expect(html).not.toContain('class="timeline"');
    expect(html).not.toContain('expanded');
    expect(html).not.toContain("'/tasks/' + encodeURIComponent(id) + '/activity'");
  });

  it('task detail HTML shows activity metadata and linked decisions with reasoning', async () => {
    await app.inject({ method: 'POST', url: '/tasks', payload: { title: 'Detail transparency', role: 'implementer' } });
    await app.inject({
      method: 'POST',
      url: '/decisions',
      payload: {
        title: 'Keep cards slim',
        context: 'Transparency belongs on the task detail page.',
        decision: 'Task cards link to detail pages instead of expanding inline.',
      },
    });
    await app.inject({
      method: 'POST',
      url: '/handoffs',
      payload: {
        fromRole: 'architect',
        toRole: 'implementer',
        taskId: 'TSK-0001',
        summary: 'Implement detail view',
        decisions: ['DEC-0001'],
      },
    });
    await app.inject({
      method: 'PATCH',
      url: '/tasks/TSK-0001',
      payload: { status: 'done', doneTokens: 3210, doneDuration: 65000, doneBy: 'codex' },
    });

    const res = await app.inject({ method: 'GET', url: '/tasks/TSK-0001', headers: { accept: 'text/html' } });
    expect(res.statusCode).toBe(200);
    expect(res.headers['content-type']).toContain('text/html');
    expect(res.payload).toContain('Decisions &amp; Reasoning');
    expect(res.payload).toContain('Keep cards slim');
    expect(res.payload).toContain('Transparency belongs on the task detail page.');
    expect(res.payload).toContain('3210&thinsp;tok');
    expect(res.payload).toContain('1m');
  });

  it('serves the activity page with recent activity and done archive', async () => {
    await app.inject({ method: 'POST', url: '/tasks', payload: { title: 'Done item', role: 'implementer' } });
    await app.inject({
      method: 'PATCH',
      url: '/tasks/TSK-0001',
      payload: { status: 'done', doneBy: 'codex' },
    });
    await app.inject({
      method: 'POST',
      url: '/messages',
      payload: { from: 'claude', to: 'codex', text: 'Please check the board', taskId: 'TSK-0001' },
    });

    const res = await app.inject({ method: 'GET', url: '/activity' });
    expect(res.statusCode).toBe(200);
    expect(res.headers['content-type']).toContain('text/html');
    expect(res.payload).toContain('Recent Activity');
    expect(res.payload).toContain('Done Archive');
    expect(res.payload).toContain('MSG-0001');
    expect(res.payload).toContain('TSK-0001');
  });

  it('GET /handoffs returns fromRole and toRole fields', async () => {
    await app.inject({
      method: 'POST',
      url: '/handoffs',
      payload: {
        fromRole: 'architect',
        toRole: 'implementer',
        fromAgent: 'claude',
        toAgent: 'codex',
        summary: 'Design done',
        context: 'See decisions',
      },
    });
    const res = await app.inject({ method: 'GET', url: '/handoffs' });
    expect(res.statusCode).toBe(200);
    const items = JSON.parse(res.payload) as Array<Record<string, unknown>>;
    expect(items).toHaveLength(1);
    expect(items[0].fromRole).toBe('architect');
    expect(items[0].toRole).toBe('implementer');
    expect(items[0].fromAgent).toBe('claude');
    expect(items[0].toAgent).toBe('codex');
  });
});