// Mock data for college management
const collegeTree = [
  {
    id: '1',
    name: '设计学院',
    depts: [
      {
        id: '1-1',
        name: '视觉传达设计系',
        majors: [
          {
            id: '1-1-1',
            name: '平面设计',
            classes: [
              { id: '1-1-1-1', name: '平面设计1班' },
              { id: '1-1-1-2', name: '平面设计2班' },
            ],
          },
          {
            id: '1-1-2',
            name: '数字媒体设计',
            classes: [
              { id: '1-1-2-1', name: '数字媒体1班' },
            ],
          },
        ],
      },
      {
        id: '1-2',
        name: '环境设计系',
        majors: [
          {
            id: '1-2-1',
            name: '室内设计',
            classes: [
              { id: '1-2-1-1', name: '室内设计1班' },
              { id: '1-2-1-2', name: '室内设计2班' },
              { id: '1-2-1-3', name: '室内设计3班' },
            ],
          },
        ],
      },
    ],
  },
  {
    id: '2',
    name: '管理学院',
    depts: [
      {
        id: '2-1',
        name: '工商管理系',
        majors: [
          {
            id: '2-1-1',
            name: '工商管理',
            classes: [
              { id: '2-1-1-1', name: '工商管理1班' },
              { id: '2-1-1-2', name: '工商管理2班' },
            ],
          },
          {
            id: '2-1-2',
            name: '市场营销',
            classes: [
              { id: '2-1-2-1', name: '市场营销1班' },
            ],
          },
        ],
      },
      {
        id: '2-2',
        name: '会计系',
        majors: [
          {
            id: '2-2-1',
            name: '财务管理',
            classes: [
              { id: '2-2-1-1', name: '财务管理1班' },
              { id: '2-2-1-2', name: '财务管理2班' },
            ],
          },
          {
            id: '2-2-2',
            name: '审计学',
            classes: [],
          },
        ],
      },
    ],
  },
  {
    id: '3',
    name: '艺术学院',
    depts: [
      {
        id: '3-1',
        name: '音乐系',
        majors: [
          {
            id: '3-1-1',
            name: '声乐表演',
            classes: [
              { id: '3-1-1-1', name: '声乐表演1班' },
            ],
          },
        ],
      },
    ],
  },
  {
    id: '4',
    name: '信息工程学院',
    depts: [
      {
        id: '4-1',
        name: '计算机系',
        majors: [
          {
            id: '4-1-1',
            name: '软件工程',
            classes: [
              { id: '4-1-1-1', name: '软件工程1班' },
              { id: '4-1-1-2', name: '软件工程2班' },
              { id: '4-1-1-3', name: '软件工程3班' },
            ],
          },
          {
            id: '4-1-2',
            name: '计算机科学与技术',
            classes: [
              { id: '4-1-2-1', name: '计科1班' },
              { id: '4-1-2-2', name: '计科2班' },
            ],
          },
          {
            id: '4-1-3',
            name: '人工智能',
            classes: [
              { id: '4-1-3-1', name: 'AI1班' },
            ],
          },
        ],
      },
      {
        id: '4-2',
        name: '电子信息系',
        majors: [
          {
            id: '4-2-1',
            name: '通信工程',
            classes: [
              { id: '4-2-1-1', name: '通信工程1班' },
            ],
          },
        ],
      },
    ],
  },
  {
    id: '5',
    name: '外国语学院',
    depts: [],
  },
];

export default {
  'GET /api/admin/college': (_req: any, res: any) => {
    res.json({
      code: 0,
      data: collegeTree,
      message: 'ok',
    });
  },

  'POST /api/admin/college': (req: any, res: any) => {
    const { data } = req.body;
    if (!data || !Array.isArray(data)) {
      return res.json({ code: 40000, data: null, message: '参数错误' });
    }

    // Validate: all names must be non-empty
    const validate = (items: any[], level: string): string | null => {
      for (const item of items) {
        if (!item.name || !item.name.trim()) {
          return `${level}名称不能为空`;
        }
        if (item.depts) {
          const err = validate(item.depts, '系');
          if (err) return err;
        }
        if (item.majors) {
          const err = validate(item.majors, '专业');
          if (err) return err;
        }
        if (item.classes) {
          const err = validate(item.classes, '班级');
          if (err) return err;
        }
      }
      return null;
    };

    const err = validate(data, '学院');
    if (err) {
      return res.json({ code: 40001, data: null, message: err });
    }

    console.log('[Mock] 保存学校管理数据, 学院数量:', data.length);
    res.json({
      code: 0,
      data: null,
      message: '保存成功',
    });
  },
};