import {
  Controller,
  Get,
  Param,
  Query,
  Res,
  StreamableFile,
  UseGuards,
} from '@nestjs/common';
import type { Response } from 'express';
import {
  ApiBearerAuth,
  ApiOkResponse,
  ApiProduces,
  ApiTags,
} from '@nestjs/swagger';
import { createReadStream } from 'node:fs';
import { DeviceAuthGuard } from '../auth/device-auth.guard';
import { AssetDownloadQueryDto } from './assets.dto';
import { AssetsService } from './assets.service';

@ApiTags('assets')
@UseGuards(DeviceAuthGuard)
@ApiBearerAuth()
@Controller({
  path: 'assets',
  version: '1',
})
export class AssetsController {
  constructor(private readonly assetsService: AssetsService) {}

  @Get(':assetId/download')
  @ApiProduces('audio/mpeg')
  @ApiOkResponse({
    schema: {
      type: 'string',
      format: 'binary',
    },
  })
  async download(
    @Param('assetId') assetId: string,
    @Query() query: AssetDownloadQueryDto,
    @Res({ passthrough: true }) response: Response,
  ): Promise<StreamableFile> {
    const download = await this.assetsService.getOwnedAudioAssetDownload(
      assetId,
      query.deviceId,
    );

    response.setHeader('Content-Type', 'audio/mpeg');
    response.setHeader('Content-Length', String(download.contentLength));

    return new StreamableFile(createReadStream(download.filePath));
  }
}