package com.sztzjy.linkCommerce.service.impl;

import com.sztzjy.linkCommerce.config.exception.handler.ServiceException;
import com.sztzjy.linkCommerce.config.security.JwtUser;
import com.sztzjy.linkCommerce.entity.dto.FeatureConversionStepOneValidationRequest;
import com.sztzjy.linkCommerce.entity.dto.FeatureConversionStepOneValidationResult;
import com.sztzjy.linkCommerce.service.FeatureConversionStepOneService;
import org.apache.commons.lang3.StringUtils;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class FeatureConversionStepOneServiceImpl implements FeatureConversionStepOneService {
    private static final int MIN_ROWS = 8;
    private static final int MAX_ROWS = 12;

    @Override
    public FeatureConversionStepOneValidationResult validate(FeatureConversionStepOneValidationRequest request, JwtUser user) {
        requireStudent(user);
        List<FeatureConversionStepOneValidationRequest.ConversionRow> rows = request == null ? null : request.getRows();
        if (rows == null || rows.size() < MIN_ROWS || rows.size() > MAX_ROWS || rows.stream().anyMatch(row -> row == null)) {
            throw badRequest("请填写 8 至 12 行需求转化信息");
        }
        if (rows.stream().anyMatch(row -> StringUtils.isBlank(row.getVoice())
                || StringUtils.isBlank(row.getInsight())
                || StringUtils.isBlank(row.getDefinition())
                || StringUtils.isBlank(row.getDescription())
                || StringUtils.isBlank(row.getAcceptance()))) {
            throw badRequest("请完整填写每行的用户原声、场景洞察、功能定义、功能描述和验收标准");
        }
        FeatureConversionStepOneValidationResult result = new FeatureConversionStepOneValidationResult();
        result.setValid(true);
        result.setMessage("需求转化表填写完整。");
        return result;
    }

    private void requireStudent(JwtUser user) {
        if (user == null || StringUtils.isBlank(user.getUserId())) {
            throw new ServiceException(HttpStatus.UNAUTHORIZED, "请先登录后再提交");
        }
        if (user.getRoleId() != 4) {
            throw new ServiceException(HttpStatus.FORBIDDEN, "仅学生可以提交实训答案");
        }
    }

    private ServiceException badRequest(String message) {
        return new ServiceException(HttpStatus.BAD_REQUEST, message);
    }
}