const { config } = require('../../config/index');

/** 获取商品评论数 */
function mockFetchCommentsCount(ID = 0) {
  const { delay } = require('../_utils/delay');
  const { getGoodsCommentsCount } = require('../../model/comments');
  return delay().then(() => getGoodsCommentsCount(ID));
}

/** 获取商品评论数 */
function fetchCommentsCount(productId = 0) {
  console.log('[fetchCommentsCount] 接收到的productId:', productId, '类型:', typeof productId);
  
  // 验证productId参数
  if (productId === null || productId === undefined || productId === '' || productId === 'undefined' || productId === 'null') {
    console.error('[fetchCommentsCount] 商品ID为空或无效:', productId);
    return Promise.reject(new Error('商品ID不能为空'));
  }
  
  // 确保productId是数字
  const numericProductId = Number(productId);
  console.log('[fetchCommentsCount] 转换后的数字ID:', numericProductId);
  
  if (isNaN(numericProductId) || numericProductId <= 0) {
    console.error('[fetchCommentsCount] 商品ID不是有效的正整数:', productId, '->', numericProductId);
    return Promise.reject(new Error('商品ID必须是有效的正整数'));
  }
  
  if (config.useMock) {
    return mockFetchCommentsCount(numericProductId);
  }
  
  return new Promise((resolve, reject) => {
    wx.request({
      url: `${config.apiBase}/comments/products/${numericProductId}/stats`,
      method: 'GET',
      success: (res) => {
        if (res.statusCode === 200 && res.data.code === 200) {
          // 转换数据格式以匹配前端期望的结构
          const stats = res.data.data;
          const result = {
            // 原始数据保留
            total_count: stats.total_count || 0,
            average_rating: stats.average_rating || 0,
            rating_1_count: stats.rating_1_count || 0,
            rating_2_count: stats.rating_2_count || 0,
            rating_3_count: stats.rating_3_count || 0,
            rating_4_count: stats.rating_4_count || 0,
            rating_5_count: stats.rating_5_count || 0,
            good_count: (stats.rating_4_count || 0) + (stats.rating_5_count || 0),
            medium_count: stats.rating_3_count || 0,
            bad_count: (stats.rating_1_count || 0) + (stats.rating_2_count || 0),
            image_count: stats.has_images_count || stats.image_count || 0,
            
            // 页面期望的数据格式
            commentCount: String(stats.total_count || 0),
            goodCount: String((stats.rating_4_count || 0) + (stats.rating_5_count || 0)),
            middleCount: String(stats.rating_3_count || 0),
            badCount: String((stats.rating_1_count || 0) + (stats.rating_2_count || 0)),
            hasImageCount: String(stats.has_images_count || stats.image_count || 0),
            uidCount: '0', // 用户自己的评论数，需要单独获取
          };
          resolve(result);
        } else {
          reject(new Error(res.data.message || '获取评论统计失败'));
        }
      },
      fail: (err) => {
        reject(err);
      }
    });
  });
}

module.exports = { fetchCommentsCount };