// pages/goods/detail.js
const app = getApp()

Page({
  data: {
    id: null,
    goods: {
      title: '',
      price: '0.00',
      marketPrice: '0.00',
      commission: '0.00',
      commission_rate: 0,
      sales: 0,
      shares: 0,
      images: [],
      tags: [],
      detailImages: []
    },
    current: 0,
    cartCount: 0,
    isFavorite: false,
    showShare: false,
    showPoster: false,
    posterUrl: '',
    loading: true,
    hotRecommendations: [],
    posterTemplates: [
      {
        id: 1,
        name: '简约风格',
        desc: '清新简约，突出商品主图',
        preview: '/static/images/poster/template1.png'
      },
      {
        id: 2,
        name: '活力主题',
        desc: '色彩明快，突出价格优势',
        preview: '/static/images/poster/template2.png'
      },
      {
        id: 3,
        name: '高级黑金',
        desc: '高端大气，突出品质感',
        preview: '/static/images/poster/template3.png'
      }
    ],
    currentTemplate: 1,
    showPosterModal: false,
    showBackToTop: false
  },

  onLoad(options) {
    const { id } = options
    this.setData({ id })
    this.loadGoodsDetail()
    this.getCartCount()
    this.checkFavorite()
    this.loadHotRecommendations()
  },

  onPageScroll(e) {
    // 页面滚动超过一屏时显示返回顶部按钮
    const showBackToTop = e.scrollTop > wx.getSystemInfoSync().windowHeight
    if (showBackToTop !== this.data.showBackToTop) {
      this.setData({
        showBackToTop
      })
    }
  },

  onShow() {
    this.getCartCount()
  },

  // 加载商品详情
  async loadGoodsDetail() {
    wx.showLoading({ title: '加载中' })
    try {
      // TODO: 替换为实际的API调用
      // 模拟数据
      const goods = {
        title: 'iPhone 14 Pro Max',
        price: '9299.00',
        marketPrice: '9999.00',
        commission: '186.00',
        commission_rate: 2,
        sales: 8526,
        shares: 1253,
        images: [
          '/static/images/goods/iphone-1.png',
          '/static/images/goods/iphone-2.png',
          '/static/images/goods/iphone-3.png'
        ],
        tags: ['官方正品', '全网最低价', '24期免息', '顺丰包邮'],
        detailImages: [
          '/static/images/goods/detail-1.png',
          '/static/images/goods/detail-2.png',
          '/static/images/goods/detail-3.png'
        ]
      }
      
      this.setData({
        goods,
        loading: false
      })
      wx.hideLoading()
    } catch (error) {
      console.error('加载商品详情失败:', error)
      wx.hideLoading()
      wx.showToast({
        title: '加载失败',
        icon: 'none'
      })
    }
  },

  // 轮播图切换
  onSwiperChange(e) {
    this.setData({
      current: e.detail.current
    })
  },

  // 预览图片
  previewImage(e) {
    const { current } = e.currentTarget.dataset
    const { images } = this.data.goods
    wx.previewImage({
      current,
      urls: images
    })
  },

  // 预览详情图片
  previewDetailImage(e) {
    const { current } = e.currentTarget.dataset
    const { detailImages } = this.data.goods
    wx.previewImage({
      current,
      urls: detailImages
    })
  },

  // 获取购物车数量
  async getCartCount() {
    try {
      const cartList = wx.getStorageSync('cart') || []
      const cartCount = cartList.reduce((sum, item) => sum + item.quantity, 0)
      this.setData({ cartCount })
    } catch (error) {
      console.error('获取购物车数量失败:', error)
    }
  },

  // 检查是否已收藏
  checkFavorite() {
    try {
      const favorites = wx.getStorageSync('favorites') || []
      const isFavorite = favorites.includes(this.data.id)
      this.setData({ isFavorite })
    } catch (error) {
      console.error('检查收藏状态失败:', error)
    }
  },

  // 切换收藏状态
  async toggleFavorite() {
    try {
      if (checkNeedLogin()) {
        try {
          await doLogin()
        } catch (err) {
          console.error('登录失败:', err)
          wx.showToast({
            title: '登录失败',
            icon: 'none'
          })
          return
        }
      }
      
      const { id, isFavorite } = this.data
      let favorites = wx.getStorageSync('favorites') || []
      
      if (isFavorite) {
        favorites = favorites.filter(item => item !== id)
      } else {
        favorites.push(id)
      }
      
      wx.setStorageSync('favorites', favorites)
      this.setData({ isFavorite: !isFavorite })
      
      wx.showToast({
        title: isFavorite ? '已取消收藏' : '已收藏',
        icon: 'success'
      })
    } catch (error) {
      console.error('收藏操作失败:', error)
      wx.showToast({
        title: '操作失败',
        icon: 'none'
      })
    }
  },

  // 加入购物车
  addToCart() {
    try {
      const { id, goods } = this.data
      let cartList = wx.getStorageSync('cart') || []
      const existItem = cartList.find(item => item.id === id)
      
      if (existItem) {
        existItem.quantity += 1
      } else {
        cartList.push({
          id,
          title: goods.title,
          price: goods.price,
          image: goods.images[0],
          quantity: 1
        })
      }
      
      wx.setStorageSync('cart', cartList)
      this.getCartCount()
      
      wx.showToast({
        title: '已加入购物车',
        icon: 'success'
      })
    } catch (error) {
      console.error('加入购物车失败:', error)
      wx.showToast({
        title: '操作失败',
        icon: 'none'
      })
    }
  },

  // 立即购买
  buyNow() {
    const { id } = this.data
    wx.navigateTo({
      url: `/pages/order/confirm?goods_id=${id}&quantity=1`
    })
  },

  // 检查推客身份
  checkPromoterStatus() {
    const userData = wx.getStorageSync('user_data')
    return userData && userData.is_promoter === 1
  },

  // 显示非推客提示弹窗
  showPromoterTips() {
    return new Promise((resolve) => {
      wx.showModal({
        title: '温馨提示',
        content: '您还不是推客，购买/分享商品将无法获得收益',
        confirmText: '去授权',
        cancelText: '暂不收益',
        success(res) {
          if (res.confirm) {
            // 跳转到推客授权页面
            wx.navigateTo({
              url: '/pages/promoter/auth'
            })
            resolve(false)
          } else {
            resolve(true)
          }
        },
        fail() {
          resolve(false)
        }
      })
    })
  },

  // 显示分享面板
  async showSharePanel() {
    if (!this.checkPromoterStatus()) {
      const continue_share = await this.showPromoterTips()
      if (!continue_share) return
    }
    this.setData({
      showShare: true
    })
  },

  // 隐藏分享面板
  hideSharePanel() {
    this.setData({ showShare: false })
  },

  // 加载热门推荐
  async loadHotRecommendations() {
    try {
      // TODO: 替换为实际的API调用
      const recommendations = [
        {
          id: 1,
          title: '2023新款时尚潮流女装连衣裙',
          price: '299.00',
          sales: 1234,
          tag: '新品',
          image: '/static/images/goods/recommend1.png'
        },
        {
          id: 2,
          title: '夏季薄款防晒衣女士外套',
          price: '199.00',
          sales: 856,
          tag: '热销',
          image: '/static/images/goods/recommend2.png'
        },
        {
          id: 3,
          title: '高腰显瘦牛仔裤女装新款',
          price: '258.00',
          sales: 2341,
          tag: '爆款',
          image: '/static/images/goods/recommend3.png'
        },
        {
          id: 4,
          title: '轻奢小香风名媛气质套装',
          price: '458.00',
          sales: 1567,
          tag: '推荐',
          image: '/static/images/goods/recommend4.png'
        },
        {
          id: 5,
          title: '夏季新款韩版休闲运动套装',
          price: '228.00',
          sales: 987,
          tag: '特惠',
          image: '/static/images/goods/recommend5.png'
        },
        {
          id: 6,
          title: '法式复古碎花连衣裙',
          price: '328.00',
          sales: 1876,
          tag: '流行',
          image: '/static/images/goods/recommend6.png'
        },
        {
          id: 7,
          title: '时尚百搭小黑裙',
          price: '269.00',
          sales: 2156,
          tag: '经典',
          image: '/static/images/goods/recommend7.png'
        },
        {
          id: 8,
          title: '轻薄透气运动鞋',
          price: '399.00',
          sales: 1432,
          tag: '新款',
          image: '/static/images/goods/recommend8.png'
        },
        {
          id: 9,
          title: '高档真丝阔腿裤套装',
          price: '599.00',
          sales: 876,
          tag: '精选',
          image: '/static/images/goods/recommend9.png'
        }
      ]
      
      this.setData({
        hotRecommendations: recommendations
      })
    } catch (error) {
      console.error('加载推荐商品失败:', error)
    }
  },

  // 跳转到商品详情
  navigateToGoods(e) {
    const { id } = e.currentTarget.dataset
    wx.navigateTo({
      url: `/pages/goods/detail?id=${id}`
    })
  },

  // 生成分享海报
  async generatePoster() {
    if (!this.checkPromoterStatus()) {
      const continue_share = await this.showPromoterTips()
      if (!continue_share) return
    }
    this.setData({
      showPosterModal: true
    })
  },

  // 切换海报模板
  switchTemplate(e) {
    const { templateId } = e.currentTarget.dataset
    this.setData({
      currentTemplate: templateId
    })
  },

  // 确认生成海报
  async confirmGeneratePoster() {
    wx.showLoading({ title: '生成中' })
    try {
      const { goods, currentTemplate } = this.data
      // TODO: 替换为实际的海报生成API调用
      const posterConfig = {
        template: currentTemplate,
        goods: {
          title: goods.title,
          price: goods.price,
          image: goods.images[0]
        }
      }
      
      // 模拟API调用
      setTimeout(() => {
        this.setData({
          posterUrl: '/static/images/poster/sample.png',
          showPosterModal: false,
          showPoster: true
        })
        wx.hideLoading()
      }, 1000)
    } catch (error) {
      console.error('生成海报失败:', error)
      wx.hideLoading()
      wx.showToast({
        title: '生成失败',
        icon: 'none'
      })
    }
  },

  // 关闭海报模态框
  closePosterModal() {
    this.setData({
      showPosterModal: false
    })
  },

  // 关闭海报预览
  closePosterPreview() {
    this.setData({
      showPoster: false,
      posterUrl: ''
    })
  },

  // 保存海报
  async savePoster() {
    try {
      await wx.saveImageToPhotosAlbum({
        filePath: this.data.posterUrl
      })
      wx.showToast({
        title: '保存成功',
        icon: 'success'
      })
      this.hidePoster()
    } catch (error) {
      console.error('保存海报失败:', error)
      if (error.errMsg.includes('auth deny')) {
        wx.showModal({
          title: '提示',
          content: '需要您授权保存图片到相册',
          success: (res) => {
            if (res.confirm) {
              wx.openSetting()
            }
          }
        })
      } else {
        wx.showToast({
          title: '保存失败',
          icon: 'none'
        })
      }
    }
  },

  // 分享给好友
  onShareAppMessage() {
    const { goods } = this.data
    return {
      title: goods.title,
      imageUrl: goods.images[0],
      path: `/pages/goods/detail?id=${this.data.id}`
    }
  },

  // 分享到朋友圈
  onShareTimeline() {
    const { goods } = this.data
    return {
      title: goods.title,
      imageUrl: goods.images[0],
      query: `id=${this.data.id}`
    }
  },

  // 返回顶部
  scrollToTop() {
    wx.pageScrollTo({
      scrollTop: 0,
      duration: 300
    })
  },
})