const familyNames = ['赵', '冯', '钱', '刘', '孙', '李', '周', '吴', '郑', '王', '陈', '杨', '黄', '张', '林', '何', '高', '马', '罗', '梁'];
const givenNames = ['玉岚', '艺莲', '若蓉', '思钰', '婷雅', '恩铭', '浩然', '子涵', '欣怡', '梓萱', '宇轩', '雨桐', '佳琪', '思远', '天乐', '晓峰', '文博', '嘉欣', '雅静', '明辉'];
const colleges = ['电气化学院', '管理学院', '设计学院', '信息工程学院', '艺术学院', '外国语学院'];
const deptMap: Record<string, string[]> = {
  '电气化学院': ['电力工程系', '电气工程系', '自动化系'],
  '管理学院': ['工商管理系', '会计系', '人力资源系'],
  '设计学院': ['视觉传达设计系', '环境设计系'],
  '信息工程学院': ['计算机系', '电子信息系'],
  '艺术学院': ['音乐系', '美术系'],
  '外国语学院': ['英语系', '日语系'],
};
const majorMap: Record<string, string[]> = {
  '电力工程系': ['电气化', '电力工程'],
  '电气工程系': ['电气工程', '智能电网'],
  '自动化系': ['自动化', '机器人工程'],
  '工商管理系': ['工商管理', '市场营销'],
  '会计系': ['财务管理', '审计学'],
  '人力资源系': ['人力资源管理'],
  '视觉传达设计系': ['平面设计', '数字媒体设计'],
  '环境设计系': ['室内设计', '景观设计'],
  '计算机系': ['软件工程', '计算机科学与技术', '人工智能'],
  '电子信息系': ['通信工程', '电子信息'],
  '音乐系': ['声乐表演', '器乐演奏'],
  '美术系': ['国画', '油画'],
  '英语系': ['英语', '翻译'],
  '日语系': ['日语'],
};

const statuses: Array<'normal' | 'disabled'> = ['normal', 'normal', 'normal', 'normal', 'disabled'];
const roles = ['学生'];
const grades = ['2023级', '2024级', '2025级'];
const classes = ['1班', '2班', '3班', '4班', '5班'];

// 年级管理数据
const gradeList: any[] = [
  { id: '1', name: '2025级', createTime: '2025.09.01 16:01:30', graduated: false },
  { id: '2', name: '2026级', createTime: '2025.09.01 16:01:30', graduated: false },
  { id: '3', name: '2024级', createTime: '2025.09.01 16:01:30', graduated: false },
  { id: '4', name: '2023级', createTime: '2025.09.01 16:01:30', graduated: false },
  { id: '5', name: '2022级', createTime: '2025.09.01 16:01:30', graduated: false },
  { id: '6', name: '2021级', createTime: '2025.09.01 16:01:30', graduated: false },
  { id: '7', name: '2020级', createTime: '2025.09.01 16:01:30', graduated: false },
  { id: '8', name: '2025级', createTime: '2025.09.01 16:01:30', graduated: false },
  { id: '9', name: '2025级', createTime: '2025.09.01 16:01:30', graduated: false },
  { id: '10', name: '2025级', createTime: '2025.09.01 16:01:30', graduated: false },
];

// 设置一条数据为已毕业状态，用于"还原"操作演示
gradeList[1].graduated = true;

function randomPick<T>(arr: T[]): T {
  return arr[Math.floor(Math.random() * arr.length)];
}

function maskPhone(phone: string) {
  return phone.substring(0, 3) + '****' + phone.substring(7);
}

// 生成100条学生数据
const students: any[] = [];
for (let i = 0; i < 100; i++) {
  const college = randomPick(colleges);
  const depts = deptMap[college] || [];
  const dept = randomPick(depts);
  const majors = majorMap[dept] || [];
  const major = randomPick(majors);
  const status = randomPick(statuses);
  const phone = `1${randomPick(['39', '56', '78', '38', '59'])}${String(Math.floor(Math.random() * 100000000)).padStart(8, '0')}`;

  students.push({
    id: String(i + 1),
    name: randomPick(familyNames) + randomPick(givenNames),
    studentNo: String(178000 + Math.floor(Math.random() * 1000)),
    college,
    dept,
    major,
    className: `${Math.ceil(Math.random() * 3)}班`,
    grade: randomPick(grades),
    phone,
    maskedPhone: maskPhone(phone),
    role: randomPick(roles),
    updateDate: '2025.09.01',
    status,
    graduated: false,
  });
}

// 生成100条已毕业学生数据
const graduatedStudents: any[] = [];
for (let i = 0; i < 100; i++) {
  const college = randomPick(colleges);
  const depts = deptMap[college] || [];
  const dept = randomPick(depts);
  const majors = majorMap[dept] || [];
  const major = randomPick(majors);
  const status = randomPick(statuses);
  const phone = `1${randomPick(['39', '56', '78', '38', '59'])}${String(Math.floor(Math.random() * 100000000)).padStart(8, '0')}`;

  graduatedStudents.push({
    id: String(i + 2000),
    name: randomPick(familyNames) + randomPick(givenNames),
    studentNo: String(178000 + Math.floor(Math.random() * 1000)),
    college,
    dept,
    major,
    className: `${Math.ceil(Math.random() * 3)}班`,
    grade: randomPick(grades),
    phone,
    maskedPhone: maskPhone(phone),
    role: randomPick(roles),
    updateDate: '2025.09.01',
    status,
    graduated: true,
  });
}

export default {
  'GET /api/admin/student': (req: any, res: any) => {
    const {
      page = '1',
      pageSize = '10',
      graduated,
      studentNo,
      name,
      college,
      dept,
      major,
      className,
      status,
    } = req.query;

    const source = graduated === 'true' ? graduatedStudents : students;
    let filtered = [...source];

    if (studentNo) {
      filtered = filtered.filter((s) => s.studentNo.includes(studentNo));
    }
    if (name) {
      filtered = filtered.filter((s) => s.name.includes(name));
    }
    if (college) {
      filtered = filtered.filter((s) => s.college === college);
    }
    if (dept) {
      filtered = filtered.filter((s) => s.dept === dept);
    }
    if (major) {
      filtered = filtered.filter((s) => s.major === major);
    }
    if (className) {
      filtered = filtered.filter((s) => s.className === className);
    }
    if (status) {
      filtered = filtered.filter((s) => s.status === status);
    }

    const p = Number(page);
    const ps = Number(pageSize);
    const start = (p - 1) * ps;
    const list = filtered.slice(start, start + ps);

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

  'POST /api/admin/student/toggle-status': (req: any, res: any) => {
    const { id } = req.body;
    const student = students.find((s) => s.id === id) || graduatedStudents.find((s) => s.id === id);
    if (student) {
      student.status = student.status === 'normal' ? 'disabled' : 'normal';
      res.json({ code: 0, data: null, message: '操作成功' });
    } else {
      res.json({ code: 40000, data: null, message: '学生不存在' });
    }
  },

  'POST /api/admin/student/delete': (req: any, res: any) => {
    const { id } = req.body;
    let idx = students.findIndex((s) => s.id === id);
    if (idx > -1) {
      students.splice(idx, 1);
      res.json({ code: 0, data: null, message: '删除成功' });
      return;
    }
    idx = graduatedStudents.findIndex((s) => s.id === id);
    if (idx > -1) {
      graduatedStudents.splice(idx, 1);
      res.json({ code: 0, data: null, message: '删除成功' });
      return;
    }
    res.json({ code: 40000, data: null, message: '学生不存在' });
  },

  'POST /api/admin/student/batch-delete': (req: any, res: any) => {
    const { ids, graduated } = req.body;
    if (!ids || !Array.isArray(ids) || ids.length === 0) {
      res.json({ code: 40000, data: null, message: '请选择要删除的学生' });
      return;
    }
    const source = graduated ? graduatedStudents : students;
    let count = 0;
    for (let i = source.length - 1; i >= 0; i--) {
      if (ids.includes(source[i].id)) {
        source.splice(i, 1);
        count++;
      }
    }
    res.json({ code: 0, data: { count }, message: `成功删除${count}名学生` });
  },

  'POST /api/admin/student/batch-import': (req: any, res: any) => {
    // 模拟批量导入5名学生
    const imported: any[] = [];
    for (let i = 0; i < 5; i++) {
      const college = randomPick(colleges);
      const depts = deptMap[college] || [];
      const dept = randomPick(depts);
      const majors = majorMap[dept] || [];
      const major = randomPick(majors);
      const phone = `1${randomPick(['39', '56', '78', '38', '59'])}${String(Math.floor(Math.random() * 100000000)).padStart(8, '0')}`;
      const newStudent = {
        id: String(Date.now() + i),
        name: randomPick(familyNames) + randomPick(givenNames),
        studentNo: String(178000 + Math.floor(Math.random() * 1000)),
        college,
        dept,
        major,
        className: `${Math.ceil(Math.random() * 3)}班`,
        grade: randomPick(grades),
        phone,
        maskedPhone: maskPhone(phone),
        role: '学生',
        updateDate: new Date().toISOString().slice(0, 10).replace(/-/g, '.'),
        status: 'normal' as const,
        graduated: false,
      };
      students.unshift(newStudent);
      imported.push(newStudent);
    }
    res.json({ code: 0, data: { count: imported.length }, message: `成功导入${imported.length}名学生` });
  },

  'POST /api/admin/student/reset-password': (req: any, res: any) => {
    const { id } = req.body;
    const student = students.find((s) => s.id === id) || graduatedStudents.find((s) => s.id === id);
    if (student) {
      console.log(`[Mock] 重置学生 ${student.name} 密码`);
      res.json({ code: 0, data: null, message: '密码已重置为 123456' });
    } else {
      res.json({ code: 40000, data: null, message: '学生不存在' });
    }
  },

  'POST /api/admin/student/edit': (req: any, res: any) => {
    const { id, name, studentNo, role, college, dept, major, className, grade, phone } = req.body;
    const student = students.find((s) => s.id === id) || graduatedStudents.find((s) => s.id === id);
    if (!student) {
      res.json({ code: 40000, data: null, message: '学生不存在' });
      return;
    }
    if (!name || !studentNo || !role || !college || !dept || !major || !className || !grade) {
      res.json({ code: 40000, data: null, message: '请填写完整信息' });
      return;
    }
    Object.assign(student, {
      name, studentNo, role, college, dept, major, className, grade,
      phone: phone || '',
      maskedPhone: phone ? phone.substring(0, 3) + '****' + phone.substring(7) : '',
      updateDate: new Date().toISOString().slice(0, 10).replace(/-/g, '.'),
    });
    res.json({ code: 0, data: student, message: '编辑成功' });
  },

  'POST /api/admin/student/add': (req: any, res: any) => {
    const { name, studentNo, role, college, dept, major, className, grade, phone } = req.body;
    if (!name || !studentNo || !role || !college || !dept || !major || !className || !grade) {
      res.json({ code: 40000, data: null, message: '请填写完整信息' });
      return;
    }
    const newStudent = {
      id: String(students.length + 1000),
      name,
      studentNo,
      college,
      dept,
      major,
      className,
      grade,
      phone: phone || '',
      maskedPhone: phone ? phone.substring(0, 3) + '****' + phone.substring(7) : '',
      role,
      updateDate: new Date().toISOString().slice(0, 10).replace(/-/g, '.'),
      status: 'normal' as const,
    };
    students.unshift(newStudent);
    res.json({ code: 0, data: newStudent, message: '新增成功' });
  },

  'GET /api/admin/student/colleges': (_req: any, res: any) => {
    res.json({
      code: 0,
      data: {
        colleges,
        deptMap,
        majorMap,
        classes,
        grades,
        roles,
      },
      message: 'ok',
    });
  },

  // 年级管理接口
  'GET /api/admin/grade': (req: any, res: any) => {
    const { page = '1', pageSize = '10', name } = req.query;
    let filtered = [...gradeList];
    if (name) {
      filtered = filtered.filter((g: any) => g.name.includes(name));
    }
    const p = Number(page);
    const ps = Number(pageSize);
    const start = (p - 1) * ps;
    const list = filtered.slice(start, start + ps);
    res.json({ code: 0, data: { list, total: filtered.length, page: p, pageSize: ps }, message: 'ok' });
  },

  'POST /api/admin/grade/add': (req: any, res: any) => {
    const { name } = req.body;
    const newGrade = {
      id: String(gradeList.length + 1),
      name,
      createTime: new Date().toISOString().replace('T', ' ').slice(0, 19),
    };
    gradeList.unshift(newGrade);
    res.json({ code: 0, data: newGrade, message: '新增成功' });
  },

  'POST /api/admin/grade/edit': (req: any, res: any) => {
    const { id, name } = req.body;
    const item = gradeList.find((g: any) => g.id === id);
    if (item) {
      item.name = name;
      res.json({ code: 0, data: item, message: '编辑成功' });
    } else {
      res.json({ code: 1, message: '未找到该年级' });
    }
  },

  'POST /api/admin/grade/graduate': (req: any, res: any) => {
    const { id } = req.body;
    const idx = gradeList.findIndex((g: any) => g.id === id);
    if (idx >= 0) {
      gradeList[idx].graduated = true;
      res.json({ code: 0, message: '转毕业成功' });
    } else {
      res.json({ code: 1, message: '未找到该年级' });
    }
  },

  'POST /api/admin/grade/restore': (req: any, res: any) => {
    const { id } = req.body;
    const idx = gradeList.findIndex((g: any) => g.id === id);
    if (idx >= 0) {
      gradeList[idx].graduated = false;
      res.json({ code: 0, message: '还原成功' });
    } else {
      res.json({ code: 1, message: '未找到该年级' });
    }
  },
};