import { Controller, Get, Logger, Param, Query } from '@nestjs/common';
import {
  ApiOperation,
  ApiResponse,
  ApiTags,
  ApiParam,
  ApiQuery,
} from '@nestjs/swagger';
import { RecommendationService } from './recommendation.service';
import {
  YouMayAlsoLikeVideoResponseDto,
  YouMayAlsoLikeAdResponseDto,
} from './dto/enriched-recommendation.dto';
import { AdType as PrismaAdType } from '@prisma/mongo/client';

@ApiTags('推荐')
@Controller('recommend')
export class RecommendPublicController {
  private readonly logger = new Logger(RecommendPublicController.name);

  constructor(private readonly recommendationService: RecommendationService) {}

  @Get('video/:videoId')
  @ApiOperation({
    summary: '获取视频推荐 - 猜你喜欢',
    description:
      '基于当前视频的标签和Redis分数，返回带有完整元数据的相似视频推荐列表。仅返回上架状态的视频。',
  })
  @ApiParam({
    name: 'videoId',
    description: '当前视频ID',
    example: '6756abc123def',
  })
  @ApiQuery({
    name: 'limit',
    required: false,
    description: '返回推荐数量（默认6）',
    example: 6,
  })
  @ApiResponse({
    status: 200,
    description: '成功返回推荐列表',
    type: YouMayAlsoLikeVideoResponseDto,
  })
  async getVideoRecommendations(
    @Param('videoId') videoId: string,
    @Query('limit') limit?: string,
  ): Promise<YouMayAlsoLikeVideoResponseDto> {
    const limitNum = limit ? parseInt(limit, 10) : 6;

    this.logger.debug(
      `GET /api/v1/recommend/video/${videoId}?limit=${limitNum}`,
    );

    const recommendations =
      await this.recommendationService.getEnrichedVideoRecommendations(
        videoId,
        limitNum,
      );

    return {
      currentVideoId: videoId,
      recommendations,
      count: recommendations.length,
    };
  }

  @Get('ad/:adId')
  @ApiOperation({
    summary: '获取广告推荐 - 猜你喜欢',
    description:
      '基于渠道和广告模块过滤，返回带有完整元数据的相似广告推荐列表。仅返回同渠道、同模块、状态启用且在有效期内的广告。',
  })
  @ApiParam({
    name: 'adId',
    description: '当前广告ID',
    example: '6756def456ghi',
  })
  // @ApiQuery({
  //   name: 'channelId',
  //   required: true,
  //   description: '渠道ID（必须匹配）',
  //   example: '6756channel123',
  // })
  @ApiQuery({
    name: 'adType',
    required: true,
    enum: PrismaAdType,
    description: '广告类型/模块 (AdType enum)',
  })
  @ApiQuery({
    name: 'limit',
    required: false,
    description: '返回推荐数量（默认3）',
    example: 3,
  })
  @ApiResponse({
    status: 200,
    description: '成功返回推荐列表',
    type: YouMayAlsoLikeAdResponseDto,
  })
  async getAdRecommendations(
    @Param('adId') adId: string,
    @Query('adType') adType: PrismaAdType,
    @Query('limit') limit?: string,
  ): Promise<YouMayAlsoLikeAdResponseDto> {
    const limitNum = limit ? parseInt(limit, 10) : 3;

    this.logger.debug(
      `GET /api/v1/recommend/ad/${adId}?adType=${adType}&limit=${limitNum}`,
    );

    const recommendations =
      await this.recommendationService.getEnrichedAdRecommendations(adId, {
        adType,
        limit: limitNum,
      });

    return {
      currentAdId: adId,
      recommendations,
      count: recommendations.length,
    };
  }
}