import {
  Controller,
  Logger,
  Post,
  UseGuards,
  UseInterceptors,
  UploadedFile,
} from '@nestjs/common';
import { FileInterceptor } from '@nestjs/platform-express';
import { CombinedAuthGuard } from '../auth/combined-auth.guard';
import { OcrService } from './ocr.service';
import { I18nService } from '../i18n/i18n.service';

@Controller('ocr')
@UseGuards(CombinedAuthGuard)
@UseGuards(CombinedAuthGuard)
export class OcrController {
  private readonly logger = new Logger(OcrController.name);

  constructor(
    private readonly ocrService: OcrService,
    private readonly i18n: I18nService,
  ) {}

  @Post('recognize')
  @UseInterceptors(FileInterceptor('image'))
  async recognizeText(@UploadedFile() image: Express.Multer.File) {
    this.logger.log('OCR recognition endpoint called');
    if (!image) {
      this.logger.error('No image uploaded');
      throw new Error(this.i18n.getMessage('noImageUploaded'));
    }
    this.logger.log('Received image. Size: ' + image.size + ' bytes');
    const text = await this.ocrService.extractTextFromImage(image.buffer);
    this.logger.log('OCR extraction completed. Text length: ' + text.length);
    return { text };
  }
}