import {
  Controller,
  Get,
  Post,
  Put,
  Delete,
  Body,
  Param,
  Query,
  UseGuards,
  Request,
  Res,
} from '@nestjs/common';
import type { Response } from 'express';
import { AttendanceService } from './attendance.service';
import {
  BatchCreateAttendanceDto,
  AttendanceSummaryQueryDto,
  AttendanceCalendarQueryDto,
  QueryAttendanceRecordsDto,
  QueryDingRawDto,
  MatchDingRecordDto,
  AttendanceReportQueryDto,
  UpdateAttendanceRecordDto,
} from './dto/attendance.dto';
import { JwtAuthGuard } from '../auth/guards/jwt-auth.guard';
import { OperationLogsService } from '../operation-logs/operation-logs.service';
import { extractRequestInfo } from '../common/request-utils';
import { RequirePermission } from '../auth/decorators/permission.decorator';
import * as ExcelJS from 'exceljs';

@UseGuards(JwtAuthGuard)
@Controller()
export class AttendanceController {
  constructor(
    private readonly service: AttendanceService,
    private readonly logService: OperationLogsService,
  ) {}

  // ── Batch create attendance records ──
  @Post('attendance-records/batch')
  @RequirePermission('attendance:create')
  async batchCreate(
    @Body() dto: BatchCreateAttendanceDto,
    @Request() req: any,
  ) {
    const { ipAddress, userAgent } = extractRequestInfo(req);
    const result = await this.service.batchCreate(dto);
    await this.logService.log({
      userId: req.user?.id,
      username: req.user?.username,
      module: '考勤管理',
      action: '批量录入考勤',
      detail: `共 ${result.count} 条`,
      ipAddress,
      userAgent,
    });
    return result;
  }

  // ── Export attendance records ──
  @Get('attendance-records/export')
  @RequirePermission('attendance:export')
  async exportRecords(
    @Query() query: QueryAttendanceRecordsDto,
    @Res() res: Response,
  ) {
    const records = await this.service.findAllForExport(query);

    const workbook = new ExcelJS.Workbook();
    const ws = workbook.addWorksheet('考勤统计报表');
    ws.columns = [
      { header: '姓名', key: 'studentName', width: 15 },
      { header: '班级', key: 'className', width: 20 },
      { header: '日期', key: 'attendanceDate', width: 15 },
      { header: '时段', key: 'session', width: 15 },
      { header: '状态', key: 'status', width: 10 },
      { header: '来源', key: 'source', width: 10 },
      { header: '备注', key: 'remark', width: 30 },
      { header: '打卡时间', key: 'createdAt', width: 20 },
    ];
    ws.getRow(1).font = { bold: true };
    ws.getRow(1).fill = { type: 'pattern', pattern: 'solid', fgColor: { argb: 'FFE0E0E0' } };

    for (const record of records) {
      ws.addRow({
        studentName: record.student?.name || '',
        className: record.class?.name || '',
        attendanceDate: record.attendanceDate || '',
        session: record.session || '',
        status: record.status || '',
        source: record.source || '',
        remark: record.remark || '',
        createdAt: record.createdAt
          ? record.createdAt.toISOString().replace('T', ' ').substring(0, 19)
          : '',
      });
    }

    const dateRange = [query.dateFrom, query.dateTo]
      .filter(Boolean)
      .join('-') || '全部';

    res.setHeader(
      'Content-Type',
      'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
    );
    res.setHeader(
      'Content-Disposition',
      `attachment; filename=${encodeURIComponent(`考勤统计报表-${dateRange}`)}.xlsx`,
    );
    await workbook.xlsx.write(res);
    res.end();
  }

  // ── List attendance records with filters ──
  @Get('attendance-records')
  @RequirePermission('attendance:view')
  findAll(@Query() query: QueryAttendanceRecordsDto) {
    return this.service.findAll(query);
  }

  // ── Update a single attendance record ──
  @Put('attendance-records/:id')
  @RequirePermission('attendance:edit')
  async update(
    @Param('id') id: string,
    @Body() dto: UpdateAttendanceRecordDto,
    @Request() req: any,
  ) {
    const { ipAddress, userAgent } = extractRequestInfo(req);
    const result = await this.service.update(+id, dto);
    await this.logService.log({
      userId: req.user?.id,
      username: req.user?.username,
      module: '考勤管理',
      action: '编辑考勤记录',
      targetId: +id,
      targetType: 'attendanceRecord',
      detail: `状态=${result.status}, 备注=${result.remark || ''}`,
      ipAddress,
      userAgent,
    });
    return result;
  }

  // ── Delete a single attendance record ──
  @Delete('attendance-records/:id')
  @RequirePermission('attendance:edit')
  async remove(
    @Param('id') id: string,
    @Request() req: any,
  ) {
    const { ipAddress, userAgent } = extractRequestInfo(req);
    const result = await this.service.remove(+id);
    await this.logService.log({
      userId: req.user?.id,
      username: req.user?.username,
      module: '考勤管理',
      action: '删除考勤记录',
      targetId: +id,
      targetType: 'attendanceRecord',
      detail: `删除考勤记录 ${id}`,
      ipAddress,
      userAgent,
    });
    return result;
  }

  // ── Get distinct classes with attendance records ──
  @Get('attendance-records/classes')
  @RequirePermission('attendance:view')
  getClasses() {
    return this.service.getClasses();
  }

  // ── Attendance summary ──
  @Get('attendance-records/summary')
  @RequirePermission('attendance:view')
  getSummary(@Query() query: AttendanceSummaryQueryDto) {
    return this.service.getSummary(query);
  }

  // ── Attendance calendar ──
  @Get('attendance-records/calendar')
  @RequirePermission('attendance:view')
  getCalendar(@Query() query: AttendanceCalendarQueryDto) {
    return this.service.getCalendar(query);
  }

  // ── DingAttendance raw records ──
  @Get('ding-attendance-raw')
  @RequirePermission('attendance:view')
  getDingRaw(@Query() query: QueryDingRawDto) {
    return this.service.getDingRaw(query);
  }

  // ── Match a dingtalk record to a student ──
  @Post('ding-attendance-raw/:id/match')
  @RequirePermission('attendance:edit')
  async matchDingRecord(
    @Param('id') id: string,
    @Body() dto: MatchDingRecordDto,
    @Request() req: any,
  ) {
    const { ipAddress, userAgent } = extractRequestInfo(req);
    const result = await this.service.matchDingRecord(+id, dto);
    await this.logService.log({
      userId: req.user?.id,
      username: req.user?.username,
      module: '考勤管理',
      action: '匹配考勤记录',
      targetId: +id,
      targetType: 'dingAttendanceRaw',
      detail: `匹配到学生 ${dto.studentId}`,
      ipAddress,
      userAgent,
    });
    return result;
  }

  // ── Attendance class-based report export ──
  @Get('attendance-records/report')
  @RequirePermission('attendance:export')
  async exportReport(
    @Query() query: AttendanceReportQueryDto,
    @Res() res: Response,
    @Request() req: any,
  ) {
    const reportData = await this.service.getReport(query);

    const workbook = new ExcelJS.Workbook();
    const ws = workbook.addWorksheet('考勤统计报表');
    ws.columns = [
      { header: '班级名称', key: 'className', width: 30 },
      { header: '总记录数', key: 'total', width: 12 },
      { header: '出勤', key: 'present', width: 10 },
      { header: '出勤率', key: 'presentRate', width: 10 },
      { header: '缺勤', key: 'absent', width: 10 },
      { header: '缺勤率', key: 'absentRate', width: 10 },
      { header: '迟到', key: 'late', width: 10 },
      { header: '迟到率', key: 'lateRate', width: 10 },
      { header: '请假', key: 'leave', width: 10 },
      { header: '请假率', key: 'leaveRate', width: 10 },
    ];
    ws.getRow(1).font = { bold: true };
    ws.getRow(1).fill = { type: 'pattern', pattern: 'solid', fgColor: { argb: 'FFE0E0E0' } };

    for (const row of reportData) {
      ws.addRow({
        className: row.className,
        total: row.total,
        present: row.present,
        presentRate: `${row.presentRate}%`,
        absent: row.absent,
        absentRate: `${row.absentRate}%`,
        late: row.late,
        lateRate: `${row.lateRate}%`,
        leave: row.leave,
        leaveRate: `${row.leaveRate}%`,
      });
    }

    // Audit log
    const { ipAddress, userAgent } = extractRequestInfo(req);
    await this.logService.log({
      userId: req.user?.id,
      username: req.user?.username,
      module: '考勤管理',
      action: '导出考勤报表',
      detail: `classId=${query.classId || '全部'} ${query.dateFrom || ''}~${query.dateTo || ''}`,
      ipAddress,
      userAgent,
    });

    res.setHeader('Content-Type', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
    res.setHeader('Content-Disposition', 'attachment; filename=attendance-report.xlsx');
    await workbook.xlsx.write(res);
    res.end();
  }

  // ── Abnormal attendance alerts ──
  @Get('attendance-records/alerts')
  @RequirePermission('attendance:view')
  getAlerts(
    @Query('days') days?: string,
    @Query('threshold') threshold?: string,
  ) {
    return this.service.getAlerts(
      days ? +days : 14,
      threshold ? +threshold : 3,
    );
  }

  @Post('ding-attendance-raw/auto-match')
  @RequirePermission('attendance:edit')
  async autoMatch() {
    return this.service.autoMatchDingRecords();
  }
 }