package com.hlab.yanalyst.domain.channel;

import com.hlab.yanalyst.global.common.ApiResponse;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.tags.Tag;
import lombok.RequiredArgsConstructor;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Map;

@RestController
@RequestMapping("/api/recommended-channels")
@RequiredArgsConstructor
@Tag(name = "Recommended Channel API", description = "자동 발굴된 추천 채널(떡상 Shorts)")
public class RecommendedChannelController {

    private final RecommendedChannelRepository repository;
    private final ChannelDiscoveryService discoveryService;
    private final ChannelService channelService;

    @GetMapping
    @Operation(summary = "추천 채널 목록", description = "status(NEW|EXCLUDED|REGISTERED, 기본 NEW)를 배율 내림차순으로 반환")
    public ApiResponse<List<RecommendedChannel>> list(@RequestParam(defaultValue = "NEW") String status) {
        return ApiResponse.ok(repository.findByStatusOrderByRatioDesc(status));
    }

    @PostMapping("/{id}/register")
    @Operation(summary = "내 채널 등록", description = "추천 채널을 내 채널로 등록하고 REGISTERED 처리")
    @Transactional
    public ApiResponse<Void> register(@PathVariable Long id) {
        RecommendedChannel rc = repository.findById(id)
                .orElseThrow(() -> new IllegalArgumentException("추천 채널을 찾을 수 없습니다: " + id));
        channelService.saveChannelFromUrl("https://www.youtube.com/channel/" + rc.getChannelId());
        rc.setStatus("REGISTERED");
        repository.save(rc);
        return ApiResponse.ok(null);
    }

    @PostMapping("/{id}/exclude")
    @Operation(summary = "추천 제외", description = "다음 발굴에서 다시 뜨지 않게 EXCLUDED 처리")
    @Transactional
    public ApiResponse<Void> exclude(@PathVariable Long id) {
        RecommendedChannel rc = repository.findById(id)
                .orElseThrow(() -> new IllegalArgumentException("추천 채널을 찾을 수 없습니다: " + id));
        rc.setStatus("EXCLUDED");
        repository.save(rc);
        return ApiResponse.ok(null);
    }

    @PostMapping("/{id}/restore")
    @Operation(summary = "제외 복원", description = "EXCLUDED 를 다시 NEW(추천 목록)로 되돌린다")
    @Transactional
    public ApiResponse<Void> restore(@PathVariable Long id) {
        RecommendedChannel rc = repository.findById(id)
                .orElseThrow(() -> new IllegalArgumentException("추천 채널을 찾을 수 없습니다: " + id));
        rc.setStatus("NEW");
        repository.save(rc);
        return ApiResponse.ok(null);
    }

    @PostMapping("/run")
    @Operation(summary = "수동 발굴 실행", description = "스케줄과 동일한 발굴을 즉시 1회 실행")
    public ApiResponse<Map<String, Object>> run() {
        return ApiResponse.ok(discoveryService.runDiscovery());
    }
}