import {
  BadRequestException,
  Body,
  Controller,
  Delete,
  Get,
  Param,
  Patch,
  Post,
  Query,
  Res,
  StreamableFile,
  UploadedFile,
  UseGuards,
  UseInterceptors,
} from '@nestjs/common';
import { FileInterceptor } from '@nestjs/platform-express';
import { memoryStorage } from 'multer';
import type { Response } from 'express';
import { JwtAuthGuard } from '../auth/jwt-auth.guard';
import { CurrentUser } from '../auth/current-user.decorator';
import type { Actor } from '../common/record-scope';
import { CompaniesService } from './companies.service';
import { CreateCompanyDto, ListQueryDto, UpdateCompanyDto } from './dto';
import { ContactsExcelService } from './contacts-excel.service';
import { brand } from '@mento/shared';

const excelUpload = FileInterceptor('file', {
  storage: memoryStorage(),
  limits: { fileSize: 15_000_000 },
});

@Controller('companies')
@UseGuards(JwtAuthGuard)
export class CompaniesController {
  constructor(
    private readonly companiesService: CompaniesService,
    private readonly excelService: ContactsExcelService,
  ) {}

  @Get()
  list(@CurrentUser() user: Actor, @Query() query: ListQueryDto) {
    return this.companiesService.list(
      user,
      query.q,
      query.page ?? 1,
      query.limit ?? 20,
    );
  }

  @Get('export')
  async export(
    @CurrentUser() user: Actor,
    @Query('q') q: string | undefined,
    @Res({ passthrough: true }) res: Response,
  ) {
    const buffer = await this.excelService.exportCompanies(user, q);
    res.set({
      'Content-Type':
        'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
      'Content-Disposition': `attachment; filename="${brand.filePrefix}-companies.xlsx"`,
    });
    return new StreamableFile(buffer);
  }

  @Post('import/preview')
  @UseInterceptors(excelUpload)
  previewImport(@UploadedFile() file?: Express.Multer.File) {
    if (!file?.buffer?.length) {
      throw new BadRequestException('فایل ارسال نشده');
    }
    return this.excelService.previewCompanies(file);
  }

  @Post('import')
  @UseInterceptors(excelUpload)
  import(
    @CurrentUser() user: Actor,
    @UploadedFile() file?: Express.Multer.File,
    @Body('mapping') mapping?: string,
    @Body('sessionId') sessionId?: string,
    @Body('offset') offset?: string,
    @Body('limit') limit?: string,
  ) {
    if (!file?.buffer?.length && !sessionId) {
      throw new BadRequestException('فایل ارسال نشده');
    }
    return this.excelService.importCompanies(user, file, mapping, {
      sessionId,
      offset,
      limit,
    });
  }

  @Get(':id')
  get(@CurrentUser() user: Actor, @Param('id') id: string) {
    return this.companiesService.get(user, id);
  }

  @Post()
  create(@CurrentUser() user: Actor, @Body() dto: CreateCompanyDto) {
    return this.companiesService.create(user, dto);
  }

  @Patch(':id')
  update(
    @CurrentUser() user: Actor,
    @Param('id') id: string,
    @Body() dto: UpdateCompanyDto,
  ) {
    return this.companiesService.update(user, id, dto);
  }

  @Delete(':id')
  async remove(@CurrentUser() user: Actor, @Param('id') id: string) {
    await this.companiesService.remove(user, id);
    return { ok: true };
  }
}