package com.tcm.training.admin.system.service;

import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.tcm.training.admin.common.PageResponse;
import com.tcm.training.admin.member.entity.AppUser;
import com.tcm.training.admin.member.mapper.UserMapper;
import com.tcm.training.admin.system.dto.UserFeedbackSubmitRequest;
import com.tcm.training.admin.system.entity.UserFeedback;
import com.tcm.training.admin.system.mapper.UserFeedbackMapper;
import com.tcm.training.admin.system.mapper.UserFeedbackQueryMapper;
import com.tcm.training.admin.system.vo.UserFeedbackListItemVO;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.regex.Pattern;

@Service
public class UserFeedbackAppService {

    private static final Pattern PHONE_PATTERN = Pattern.compile("^1\\d{10}$");
    private static final Pattern EMAIL_PATTERN = Pattern.compile("^[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,}$");

    private final UserFeedbackMapper userFeedbackMapper;
    private final UserFeedbackQueryMapper userFeedbackQueryMapper;
    private final UserMapper userMapper;

    public UserFeedbackAppService(UserFeedbackMapper userFeedbackMapper,
                                  UserFeedbackQueryMapper userFeedbackQueryMapper,
                                  UserMapper userMapper) {
        this.userFeedbackMapper = userFeedbackMapper;
        this.userFeedbackQueryMapper = userFeedbackQueryMapper;
        this.userMapper = userMapper;
    }

    public PageResponse<UserFeedbackListItemVO> page(int page, int pageSize, String content) {
        IPage<UserFeedbackListItemVO> result = userFeedbackQueryMapper.selectUserFeedbackPage(
                new Page<UserFeedbackListItemVO>(page, pageSize),
                trimToNull(content)
        );
        return PageResponse.of(result.getRecords(), result.getTotal(), result.getCurrent(), result.getSize());
    }

    @Transactional
    public void submit(Long appUserId, UserFeedbackSubmitRequest request) {
        requireAppUser(appUserId);

        UserFeedback item = new UserFeedback();
        item.setAppUserId(appUserId);
        item.setContent(normalizeContent(request.getContent()));
        item.setContact(normalizeContact(request.getContact()));
        item.setDeleted(0);
        userFeedbackMapper.insert(item);
    }

    private void requireAppUser(Long appUserId) {
        AppUser user = userMapper.selectById(appUserId);
        if (user == null || (user.getDeleted() != null && user.getDeleted() == 1)) {
            throw new IllegalArgumentException("用户不存在");
        }
    }

    private String normalizeContent(String content) {
        String trimmed = trimToNull(content);
        if (trimmed == null) {
            throw new IllegalArgumentException("请输入问题和意见");
        }
        return trimmed;
    }

    private String normalizeContact(String contact) {
        String trimmed = trimToNull(contact);
        if (trimmed == null) {
            return null;
        }
        if (!PHONE_PATTERN.matcher(trimmed).matches() && !EMAIL_PATTERN.matcher(trimmed).matches()) {
            throw new IllegalArgumentException("请输入正确的手机号或邮箱");
        }
        return trimmed;
    }

    private String trimToNull(String value) {
        if (value == null) {
            return null;
        }
        String trimmed = value.trim();
        return trimmed.isEmpty() ? null : trimmed;
    }
}