src/main/java/com/example/myproject/service/SeedRatingService.java

package com.example.myproject.service;

import com.example.myproject.entity.SeedRating;
import com.example.myproject.repository.SeedRatingRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;
import java.util.Optional;

@Service
public class SeedRatingService {

    @Autowired
    private SeedRatingRepository seedRatingRepository;

    public Map<String, Object> rateSeed(Long userId, Long seedId, Integer score) {
        validateScoreRange(score);

        Map<String, Object> response = new HashMap<>();

        try {
            Optional<SeedRating> existingRating = seedRatingRepository.findByUserIdAndSeedId(userId, seedId);

            SeedRating rating;
            if (existingRating.isPresent()) {
                rating = existingRating.get();
                rating.setScore(score);
                response.put("message", "评分更新成功");
            } else {
                rating = new SeedRating();
                rating.setUserId(userId);
                rating.setSeedId(seedId);
                rating.setScore(score);
                response.put("message", "新评分提交成功");
            }

            seedRatingRepository.save(rating);

            response.put("status", "success");
            response.put("rating_id", rating.getRatingId());
            response.put("score", rating.getScore());

        } catch (Exception e) {
            response.put("status", "error");
            response.put("message", "评分失败: " + e.getMessage());
        }

        return response;
    }

    private void validateScoreRange(Integer score) {
        if (score == null || score < 0 || score > 10) {
            throw new IllegalArgumentException("评分必须在0-10之间");
        }
    }
}