import test from 'node:test';
import assert from 'node:assert/strict';
import { randomUUID } from 'node:crypto';

process.env.NODE_ENV = 'test';
process.env.DB_PATH = ':memory:';

const jsonFetch = async (
  baseUrl: string,
  path: string,
  options?: { method?: string; body?: unknown },
) => {
  const res = await fetch(`${baseUrl}${path}`, {
    method: options?.method ?? 'GET',
    headers: options?.body ? { 'Content-Type': 'application/json' } : undefined,
    body: options?.body ? JSON.stringify(options.body) : undefined,
  });

  const text = await res.text();
  let json: any = null;
  try {
    json = text ? JSON.parse(text) : null;
  } catch {
    json = null;
  }
  return { status: res.status, json, text };
};

test('管理员任务分页统计接口返回结构正确', async () => {
  const { initDatabase, run } = await import('../api/database');
  await initDatabase();

  const { app } = await import('../api/server');
  const server = app.listen(0);

  try {
    const addr = server.address();
    assert.ok(addr && typeof addr === 'object');
    const baseUrl = `http://127.0.0.1:${addr.port}`;

    const now = Date.now();
    const userA = { id: randomUUID(), name: '测试甲', phone: '13800138001', password: '' };
    const userB = { id: randomUUID(), name: '测试乙', phone: '13800138002', password: '' };
    const subjectId = randomUUID();
    const historyTaskId = randomUUID();
    const upcomingTaskId = randomUUID();
    const activeTaskId = randomUUID();

    await run(`INSERT INTO users (id, name, phone, password) VALUES (?, ?, ?, ?)`, [
      userA.id,
      userA.name,
      userA.phone,
      userA.password,
    ]);
    await run(`INSERT INTO users (id, name, phone, password) VALUES (?, ?, ?, ?)`, [
      userB.id,
      userB.name,
      userB.phone,
      userB.password,
    ]);

    await run(
      `INSERT INTO exam_subjects (id, name, type_ratios, category_ratios, total_score, duration_minutes)
       VALUES (?, ?, ?, ?, ?, ?)`,
      [
        subjectId,
        '测试科目',
        JSON.stringify({ single: 100 }),
        JSON.stringify({ 通用: 100 }),
        100,
        60,
      ],
    );

    await run(
      `INSERT INTO questions (id, content, type, options, answer, score, category)
       VALUES (?, ?, ?, ?, ?, ?, ?)`,
      [randomUUID(), '题目1', 'single', JSON.stringify(['A', 'B']), 'A', 5, '通用'],
    );
    await run(
      `INSERT INTO questions (id, content, type, options, answer, score, category)
       VALUES (?, ?, ?, ?, ?, ?, ?)`,
      [randomUUID(), '题目2', 'single', JSON.stringify(['A', 'B']), 'B', 5, '数学'],
    );

    const historyStartAt = new Date(now - 3 * 24 * 60 * 60 * 1000).toISOString();
    const historyEndAt = new Date(now - 2 * 24 * 60 * 60 * 1000).toISOString();
    const upcomingStartAt = new Date(now + 2 * 24 * 60 * 60 * 1000).toISOString();
    const upcomingEndAt = new Date(now + 3 * 24 * 60 * 60 * 1000).toISOString();
    const activeStartAt = new Date(now - 1 * 24 * 60 * 60 * 1000).toISOString();
    const activeEndAt = new Date(now + 1 * 24 * 60 * 60 * 1000).toISOString();

    await run(
      `INSERT INTO exam_tasks (id, name, subject_id, start_at, end_at, selection_config)
       VALUES (?, ?, ?, ?, ?, ?)`,
      [historyTaskId, '历史任务', subjectId, historyStartAt, historyEndAt, null],
    );
    await run(
      `INSERT INTO exam_tasks (id, name, subject_id, start_at, end_at, selection_config)
       VALUES (?, ?, ?, ?, ?, ?)`,
      [upcomingTaskId, '未开始任务', subjectId, upcomingStartAt, upcomingEndAt, null],
    );
    await run(
      `INSERT INTO exam_tasks (id, name, subject_id, start_at, end_at, selection_config)
       VALUES (?, ?, ?, ?, ?, ?)`,
      [activeTaskId, '进行中任务', subjectId, activeStartAt, activeEndAt, null],
    );

    const linkUserToTask = async (taskId: string, userId: string) => {
      await run(`INSERT INTO exam_task_users (id, task_id, user_id) VALUES (?, ?, ?)`, [
        randomUUID(),
        taskId,
        userId,
      ]);
    };

    await linkUserToTask(historyTaskId, userA.id);
    await linkUserToTask(historyTaskId, userB.id);
    await linkUserToTask(upcomingTaskId, userA.id);
    await linkUserToTask(activeTaskId, userA.id);

    await run(
      `INSERT INTO quiz_records (id, user_id, subject_id, task_id, total_score, correct_count, total_count, created_at)
       VALUES (?, ?, ?, ?, ?, ?, ?, ?)`,
      [randomUUID(), userA.id, subjectId, historyTaskId, 90, 18, 20, new Date(now - 2.5 * 24 * 60 * 60 * 1000).toISOString()],
    );

    const overview = await jsonFetch(baseUrl, '/api/admin/dashboard/overview');
    assert.equal(overview.status, 200);
    assert.equal(overview.json?.success, true);
    assert.equal(typeof overview.json?.data?.totalUsers, 'number');
    assert.equal(typeof overview.json?.data?.activeSubjectCount, 'number');
    assert.ok(Array.isArray(overview.json?.data?.questionCategoryStats));
    assert.equal(typeof overview.json?.data?.taskStatusDistribution?.completed, 'number');
    assert.equal(typeof overview.json?.data?.taskStatusDistribution?.ongoing, 'number');
    assert.equal(typeof overview.json?.data?.taskStatusDistribution?.notStarted, 'number');

    const history = await jsonFetch(baseUrl, '/api/admin/tasks/history-stats?page=1&limit=5');
    assert.equal(history.status, 200);
    assert.equal(history.json?.success, true);
    assert.ok(Array.isArray(history.json?.data));
    assert.equal(history.json?.pagination?.page, 1);
    assert.equal(history.json?.pagination?.limit, 5);
    assert.equal(history.json?.pagination?.total, 1);
    assert.equal(history.json?.pagination?.pages, 1);
    assert.equal(history.json?.data?.[0]?.taskName, '历史任务');

    const upcoming = await jsonFetch(baseUrl, '/api/admin/tasks/upcoming-stats?page=1&limit=5');
    assert.equal(upcoming.status, 200);
    assert.equal(upcoming.json?.success, true);
    assert.ok(Array.isArray(upcoming.json?.data));
    assert.equal(upcoming.json?.pagination?.page, 1);
    assert.equal(upcoming.json?.pagination?.limit, 5);
    assert.equal(upcoming.json?.pagination?.total, 1);
    assert.equal(upcoming.json?.pagination?.pages, 1);
    assert.equal(upcoming.json?.data?.[0]?.taskName, '未开始任务');

    const invalidPageFallback = await jsonFetch(baseUrl, '/api/admin/tasks/history-stats?page=0&limit=0');
    assert.equal(invalidPageFallback.status, 200);
    assert.equal(invalidPageFallback.json?.pagination?.page, 1);
    assert.equal(invalidPageFallback.json?.pagination?.limit, 5);
  } finally {
    await new Promise<void>((resolve) => server.close(() => resolve()));
  }
});