const allAppointments = [
  // 已预约
  { id: 1, name: '能力提升面试', category: '模拟面试', time: '2025.08.10', session: '14:00:00-16:00:00', teacher: '李老师', location: '教室1', status: 'booked' },
  { id: 2, name: '能力提升面试', category: '模拟面试', time: '2025.08.10', session: '14:00:00-16:00:00', teacher: '李老师', location: '教室1', status: 'booked' },
  { id: 3, name: '能力提升面试', category: '模拟面试', time: '2025.08.10', session: '14:00:00-16:00:00', teacher: '李老师', location: '教室1', status: 'booked' },
  { id: 4, name: '职业规划咨询', category: '职业咨询', time: '2025.08.12', session: '09:00:00-11:00:00', teacher: '王老师', location: '会议室A', status: 'booked' },
  { id: 5, name: '简历修改指导', category: '简历指导', time: '2025.08.15', session: '10:00:00-12:00:00', teacher: '张老师', location: '教室3', status: 'booked' },
  // 预约待确认
  { id: 6, name: '模拟群面练习', category: '模拟面试', time: '2025.08.18', session: '14:00:00-16:00:00', teacher: '赵老师', location: '教室2', status: 'pending' },
  { id: 7, name: '行业分析讲座', category: '讲座', time: '2025.08.20', session: '09:00:00-11:00:00', teacher: '刘老师', location: '报告厅', status: 'pending' },
  { id: 8, name: '职业规划咨询', category: '职业咨询', time: '2025.08.22', session: '14:00:00-16:00:00', teacher: '王老师', location: '会议室A', status: 'pending' },
  // 已完成
  { id: 9, name: '能力提升面试', category: '模拟面试', time: '2025.07.20', session: '14:00:00-16:00:00', teacher: '李老师', location: '教室1', status: 'completed' },
  { id: 10, name: '简历修改指导', category: '简历指导', time: '2025.07.15', session: '10:00:00-12:00:00', teacher: '张老师', location: '教室3', status: 'completed' },
  { id: 11, name: '职业规划咨询', category: '职业咨询', time: '2025.07.10', session: '09:00:00-11:00:00', teacher: '王老师', location: '会议室A', status: 'completed' },
  { id: 12, name: '模拟群面练习', category: '模拟面试', time: '2025.07.05', session: '14:00:00-16:00:00', teacher: '赵老师', location: '教室2', status: 'completed' },
  // 已取消
  { id: 13, name: '行业分析讲座', category: '讲座', time: '2025.07.25', session: '09:00:00-11:00:00', teacher: '刘老师', location: '报告厅', status: 'cancelled' },
  { id: 14, name: '能力提升面试', category: '模拟面试', time: '2025.07.22', session: '14:00:00-16:00:00', teacher: '李老师', location: '教室1', status: 'cancelled' },
];

// 预约管理数据
const specialManage = [
  { id: 101, name: '能力提升面试', category: '模拟面试', startTime: '2025.09.01', endTime: '2026.10.01', remaining: 20, total: 300, sessions: 20, teacher: '李老师', status: 'ongoing' },
  { id: 102, name: '能力提升面试', category: '模拟面试', startTime: '2025.09.01', endTime: '2026.10.01', remaining: 20, total: 300, sessions: 20, teacher: '李老师', status: 'ended' },
  { id: 103, name: '能力提升面试', category: '模拟面试', startTime: '2025.09.01', endTime: '2026.10.01', remaining: 0, total: 300, sessions: 20, teacher: '李老师', status: 'ongoing' },
];
const categories = ['模拟面试', '职业咨询', '简历指导'];
const teachers = ['李老师', '王老师', '张老师', '赵老师', '刘老师', '陈老师', '周老师', '吴老师'];
const statuses = ['ongoing', 'notStarted', 'ongoing', 'ongoing', 'ongoing', 'ongoing', 'ended', 'ongoing'];
const names = ['能力提升面试', '职业规划咨询', '简历修改指导', '模拟群面练习', '行业分析讲座', '求职技巧培训'];
const manageAppointments = [
  ...specialManage,
  ...Array.from({ length: 97 }, (_, i) => ({
    id: 104 + i,
    name: names[i % names.length],
    category: categories[i % categories.length],
    startTime: '2025.09.01',
    endTime: '2026.10.01',
    remaining: 20 + (i % 50),
    total: 300,
    sessions: 10 + (i % 20),
    teacher: teachers[i % teachers.length],
    status: statuses[i % statuses.length],
  })),
];

// 用户映射：userId=2 的用户没有任何预约数据
const userAppointments: Record<number, number[]> = {
  1: allAppointments.map((a) => a.id), // 默认用户有所有数据
  2: [], // 空白用户
};

export default {
  // 获取预约列表
  'GET /api/appointment/list': (req: any, res: any) => {
    const { status, name, student, date, page = 1, pageSize = 10, userId = 1 } = req.query;
    const uid = Number(userId);
    const userIds = userAppointments[uid] ?? userAppointments[1];

    let filtered = allAppointments.filter((item) => userIds.includes(item.id));

    // 按状态筛选
    if (status) {
      filtered = filtered.filter((item) => item.status === status);
    }

    // 按预约名称模糊搜索
    if (name) {
      filtered = filtered.filter((item) => item.name.includes(name));
    }

    // 按日期筛选
    if (date) {
      filtered = filtered.filter((item) => item.time === date);
    }

    const total = filtered.length;
    const start = (Number(page) - 1) * Number(pageSize);
    const end = start + Number(pageSize);
    const list = filtered.slice(start, end);

    res.json({
      code: 0,
      data: {
        list,
        total,
        page: Number(page),
        pageSize: Number(pageSize),
      },
      message: 'ok',
    });
  },

  // 预约管理列表
  'GET /api/appointment/manage': (req: any, res: any) => {
    const { name, category, teacher, status, page = 1, pageSize = 10 } = req.query;

    let filtered = [...manageAppointments];

    if (name) {
      filtered = filtered.filter((item) => item.name.includes(name));
    }
    if (category) {
      filtered = filtered.filter((item) => item.category === category);
    }
    if (teacher) {
      filtered = filtered.filter((item) => item.teacher.includes(teacher));
    }
    if (status) {
      filtered = filtered.filter((item) => item.status === status);
    }

    const total = filtered.length;
    const start = (Number(page) - 1) * Number(pageSize);
    const end = start + Number(pageSize);
    const list = filtered.slice(start, end);

    res.json({
      code: 0,
      data: { list, total, page: Number(page), pageSize: Number(pageSize) },
      message: 'ok',
    });
  },

  // 预约操作
  'POST /api/appointment/book': (req: any, res: any) => {
    const { id } = req.body;
    const item = manageAppointments.find((a) => a.id === Number(id));

    if (!item) {
      res.json({ code: 404, message: '预约项目不存在' });
      return;
    }
    if (item.status === 'ended') {
      res.json({ code: 400, message: '该项目已结束，不可预约' });
      return;
    }
    if (item.remaining <= 0) {
      res.json({ code: 400, message: '名额已满，不可预约' });
      return;
    }

    item.remaining -= 1;
    res.json({ code: 0, message: '预约成功' });
  },

  // 取消预约
  'POST /api/appointment/cancel': (req: any, res: any) => {
    const { id } = req.body;
    const appointment = allAppointments.find((a) => a.id === Number(id));

    if (!appointment) {
      res.json({ code: 404, message: '预约不存在' });
      return;
    }

    // 已完成的不能取消
    if (appointment.status === 'completed') {
      res.json({ code: 400, message: '已结束的预约不能取消' });
      return;
    }

    // 已取消的不能重复取消
    if (appointment.status === 'cancelled') {
      res.json({ code: 400, message: '该预约已取消' });
      return;
    }

    // 只有 booked 和 pending 可以取消
    appointment.status = 'cancelled';
    res.json({ code: 0, message: '取消成功' });
  },
};