import { Body, Controller, Delete, Get, Header, Param, ParseBoolPipe, ParseIntPipe, Patch, Put, Query, } from "@nestjs/common";
import { RolesAllowed } from "src/common/decorators/roles.decorators";
import { Roles as RoleEnum } from '.prisma/client';
import { ApiBearerAuth, ApiTags } from "@nestjs/swagger";
import { ShiftsCommandService } from "../services/shifts-command.service";
import { ShiftsQueryService } from "../services/shifts-query.service";
import { GetShiftsOverviewDto } from "../dtos/get-shift-overview.dto";
import { ShiftPayloadDto, UpsertShiftDto } from "../dtos/upsert-shift.dto";
import { OverviewRow } from "../types-and-interfaces/shifts-overview-row.interface";
import { UpsertAction } from "src/modules/shared/types/upsert-actions.types";

@ApiTags('Shifts')
@ApiBearerAuth('access-token')
// @UseGuards()
@Controller('shifts')
export class ShiftsController {
  constructor(
    private readonly shiftsService: ShiftsQueryService,
    private readonly shiftsCommandService: ShiftsCommandService,
  ){}

  @Put('upsert/:email')
  async upsert_by_date(
    @Param('email') email_param: string,
    @Query('action') action: UpsertAction,
    @Body() payload: UpsertShiftDto,
  ) {
    return this.shiftsCommandService.upsertShifts(email_param, action, payload);
  }

  @Delete('delete/:email/:date')
  async remove(
    @Param('email') email: string,
    @Param('date') date: string,
    @Body() payload: UpsertShiftDto,
  ) {
    return this.shiftsCommandService.deleteShift(email, date, payload);
  }

  @Patch('approval/:id')
  //@RolesAllowed(RoleEnum.ACCOUNTING, RoleEnum.ADMIN, RoleEnum.HR, RoleEnum.SUPERVISOR)
  async approve(@Param('id', ParseIntPipe) id: number, @Body('is_approved', ParseBoolPipe) isApproved: boolean) {
    return this.shiftsCommandService.updateApproval(id, isApproved);
  }

  @Get('summary')
  async getSummary( @Query() query: GetShiftsOverviewDto): Promise<OverviewRow[]> {
      return this.shiftsService.getSummary(query.period_id);
  }

  @Get('export.csv')
  @Header('Content-Type', 'text/csv; charset=utf-8')
  @Header('Content-Disposition', 'attachment; filename="shifts-validation.csv"')
  async exportCsv(@Query() query: GetShiftsOverviewDto): Promise<Buffer>{
      const rows = await this.shiftsService.getSummary(query.period_id);
      //CSV Headers
      const header = [
                      'full_name',
                      'supervisor',
                      'total_regular_hrs',
                      'total_evening_hrs',
                      'total_overtime_hrs',
                      'total_expenses',
                      'total_mileage',
                      'is_validated'
                  ].join(',') + '\n';

      //CSV rows
      const body = rows.map(r => {
          const esc = (str: string) => `"${str.replace(/"/g, '""')}"`;

          return [
              esc(r.full_name),
              esc(r.supervisor),
              r.total_regular_hrs.toFixed(2),
              r.total_evening_hrs.toFixed(2),
              r.total_overtime_hrs.toFixed(2),
              r.total_expenses.toFixed(2),
              r.total_mileage.toFixed(2),
              r.is_approved,
          ].join(',');
      }).join('\n');

      return Buffer.from('\uFEFF' + header + body, 'utf8');
  }

}