// src/excel/excel.controller.ts
import {
  Controller,
  Post,
  UploadedFile,
  UseInterceptors,
  BadRequestException,
} from '@nestjs/common';
import { FileInterceptor } from '@nestjs/platform-express';
import { ExcelService } from './excel.service';
import { ExcelDocumentation } from './excel.documentation';

@Controller('excel')
export class ExcelController {
  constructor(private readonly excelService: ExcelService) {}

  @Post('verify')
  @UseInterceptors(FileInterceptor('file'))
  @ExcelDocumentation.verifyExcel()
  async verifyExcel(@UploadedFile() file: Express.Multer.File) {
    if (!file) throw new BadRequestException('Se requiere un archivo .xlsx');
    const errors = await this.excelService.validateFile(file.buffer);
    return { valid: errors.length === 0, errors };
  }

  @Post('load')
  @UseInterceptors(FileInterceptor('file'))
  @ExcelDocumentation.loadExcel()
  async loadExcel(@UploadedFile() file: Express.Multer.File) {
    if (!file) throw new BadRequestException('Se requiere un archivo .xlsx');
    const result = await this.excelService.loadFile(file.buffer);
    return result; // { inserted: X }
  }
}