import {
  Controller,
  Get,
  Request,
  Post,
  UseInterceptors,
  UploadedFile,
  Param,
} from "@nestjs/common";
import { FileInterceptor } from "@nestjs/platform-express";
import { ApiBearerAuth, ApiBody, ApiConsumes } from "@nestjs/swagger";
import { AppService } from "./app.service";
import { MinioProvider } from "./providers/minio/minio.provider";

@ApiBearerAuth("access-token") // this appends authorization header for swagger UI
@Controller()
export class AppController {
  constructor(
    private readonly appService: AppService,
    private readonly storageProvider: MinioProvider,
  ) {}

  @Get()
  getHello(): string {
    return this.appService.getHello();
  }

  /**
   * Sample function for file upload
   * filename is expected to be absolute path wrt bucket
   * @returns
   */
  @Post("uploadFile/:filename")
  @UseInterceptors(FileInterceptor("file"))
  @ApiConsumes("multipart/form-data")
  @ApiBody({
    type: "multipart/form-data",
    required: true,
    schema: {
      type: "object",
      properties: {
        file: {
          type: "string",
          format: "binary",
        },
      },
    },
  })
  uploadFile(
    @UploadedFile("file") file: Express.Multer.File,
    @Param("filename") filename: string,
    @Param("bucketName") bucketName: string,
  ) {
    return this.storageProvider.uploadFile(bucketName, filename, file.buffer);
  }

  /**
   * Sample API to get temporary download URL
   * @returns
   */
  @Get("getDownloadURL")
  getDownloadURL(
    @Param("filename") filename: string,
    @Param("bucketName") bucketName: string,
  ) {
    return this.storageProvider.getTemporarySharedURL(bucketName, filename);
  }

  @Get("whoami")
  whoami(@Request() req) {
    // this function currently returns just logged in user emai
    // req.user object will contain entire decoded jwt
    // request will not reach here till it has passed AuthGuards
    return {
      id: req.user.id,
    };
  }
}