import {
  mapGetters
} from "vuex"
import {
  cartList
} from "@/api/goods/cart"
export default {
  data: () => {
    return {
      cartList: [], // 购物车
      checkAll: false,
      totalPrice: "0.00",
      totalCount: 0,
      invalidGoods: [], // 失效商品集合
      loading: true,
      modifyNum: 1, // 防止数量跳动
    }
  },
  created() {
    this.getCartList()
  },
  computed: {
    ...mapGetters(["defaultGoodsImage"])
  },
  middleware: 'auth',
  methods: {
    // 获取购物车数据
    getCartList() {
      cartList({})
        .then(res => {
          if (res.code >= 0 && res.data.length) {
            this.handleCartList(res.data)
          }
          this.loading = false
        })
        .catch(res => {
          this.loading = false
        })
    },
    // 处理购物车数据结构
    handleCartList(data) {
      this.invalidGoods = []
      this.cartList = []
      var temp = {}
      data.forEach((item, index) => {
        if (item.goods_state == 1) {
          item.checked = true
          if (temp["site_" + item.site_id] != undefined) {
            temp["site_" + item.site_id].cartList.push(item)
          } else {
            temp["site_" + item.site_id] = {
              siteId: item.site_id,
              siteName: item.site_name,
              checked: true,
              cartList: [item]
            }
          }
        } else {
          this.invalidGoods.push(item)
        }
      })


      this.invalidGoods.forEach(v => {
        if (v.sku_spec_format) {
          v.sku_spec_format = JSON.parse(v.sku_spec_format)
        } else {
          v.sku_spec_format = []
        }
      })
      Object.keys(temp).forEach(key => {
        this.cartList.push(temp[key])
      })
      this.calculationTotalPrice()
      this.cartList.forEach(v => {
        v.cartList.forEach(k => {
          if (k.sku_spec_format) {
            k.sku_spec_format = JSON.parse(k.sku_spec_format)
          } else {
            k.sku_spec_format = []
          }
        })
      })
    },
    // 单选
    singleElection(siteIndex, index) {
      this.calculationTotalPrice()
    },
    // 店铺全选
    siteAllElection(index) {
      this.cartList[index].cartList.forEach(item => {
        item.checked = this.cartList[index].checked
      })
      this.calculationTotalPrice()
    },
    // 全选
    allElection() {
      if (this.cartList.length) {
        this.cartList.forEach(siteItem => {
          siteItem.checked = this.checkAll
          siteItem.cartList.forEach(item => {
            item.checked = this.checkAll
          })
        })
      }
      this.calculationTotalPrice()
    },
    // 计算购物车总价
    calculationTotalPrice() {
      if (this.cartList.length) {
        let totalPrice = 0,
          totalCount = 0,
          siteAllElectionCount = 0

        this.cartList.forEach(siteItem => {
          let siteGoodsCount = 0
          siteItem.cartList.forEach(item => {
            if (item.checked) {
              siteGoodsCount += 1
              totalCount += 1
              totalPrice += item.discount_price * item.num
            }
          })
          if (siteItem.cartList.length == siteGoodsCount) {
            siteItem.checked = true
            siteAllElectionCount += 1
          } else {
            siteItem.checked = false
          }
        })
        this.totalPrice = totalPrice.toFixed(2)
        this.totalCount = totalCount
        this.checkAll = this.cartList.length == siteAllElectionCount
      } else {
        this.totalPrice = "0.00"
        this.totalCount = 0
      }
      this.modifyNum = 1;
    },
    // 删除单个
    deleteCart(siteIndex, cartIndex) {
      this.$confirm("确定要删除该商品吗？", "提示信息", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
      }).then(() => {
        this.$store
          .dispatch("cart/delete_cart", {
            cart_id: this.cartList[siteIndex].cartList[cartIndex].cart_id.toString()
          })
          .then(res => {
            if (res.code >= 0) {
              this.cartList[siteIndex].cartList.splice(cartIndex, 1)
              if (this.cartList[siteIndex].cartList.length == 0) this.cartList.splice(siteIndex, 1)
              this.calculationTotalPrice()
              this.$message({
                type: "success",
                message: "删除成功"
              })
            } else {
              this.$message({
                message: res.message,
                type: "warning"
              })
            }
          })
          .catch(err => {
            this.$message.error(err.message)
          })
      })
    },
    // 删除选择的购物车
    deleteCartSelected() {
      var cartIds = []
      var selectedItem = []
      this.cartList.forEach((siteItem, siteIndex) => {
        siteItem.cartList.forEach((item, cartIndex) => {
          if (item.checked) {
            cartIds.push(item.cart_id)
            selectedItem.push({
              siteIndex: siteIndex,
              cartIndex: cartIndex,
              siteId: siteItem.siteId,
              cartId: item.cart_id
            })
          }
        })
      })

      if (cartIds.length == 0) {
        this.$message({
          message: "请选择要删除的商品",
          type: "warning"
        })
        return
      }

      this.$confirm("确定要删除选择的商品吗？", "提示信息", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
      }).then(() => {
        this.$store
          .dispatch("cart/delete_cart", {
            cart_id: cartIds.toString()
          })
          .then(res => {
            if (res.code >= 0) {
              selectedItem.forEach(selectedItem => {
                this.cartList.forEach((siteItem, siteIndex) => {
                  siteItem.cartList.forEach((item, cartIndex) => {
                    if (selectedItem.cartId == item.cart_id) {
                      siteItem.cartList.splice(cartIndex, 1)
                    }
                    if (siteItem.cartList.length == 0) {
                      this.cartList.splice(siteIndex, 1)
                    }
                  })
                })
              })
              this.calculationTotalPrice()
              this.$message({
                type: "success",
                message: "删除成功"
              })
            } else {
              this.$message({
                message: res.message,
                type: "warning"
              })
            }
          })
          .catch(err => {
            this.$message.error(err.message)
          })
      })
    },
    // 清空失效商品
    clearInvalidGoods() {
      this.$confirm("确认要清空这些商品吗？", "提示信息", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
      }).then(() => {
        var cartIds = []
        this.invalidGoods.forEach(goodsItem => {
          cartIds.push(goodsItem.cart_id)
        })
        if (cartIds.length) {
          this.$store
            .dispatch("cart/delete_cart", {
              cart_id: cartIds.toString()
            })
            .then(res => {
              if (res.code >= 0) {
                this.invalidGoods = []
                this.$message({
                  type: "success",
                  message: "删除成功"
                })
              } else {
                this.$message({
                  message: res.message,
                  type: "warning"
                })
              }
            })
            .catch(err => {
              this.$message.error(err.message)
            })
        }
      })
    },
    // 变更购物车数量
    cartNumChange(num, params) {
      if (num < 1 || !num) num = 1;
      // 防止数量跳动
      this.modifyNum = 0;
      this.$store
        .dispatch("cart/edit_cart_num", {
          num,
          cart_id: this.cartList[params.siteIndex].cartList[params.cartIndex].cart_id
        })
        .then(res => {
          if (res.code >= 0) {
            this.cartList[params.siteIndex].cartList[params.cartIndex].num = num;
            this.calculationTotalPrice();
          } else {
            this.$message({
              message: res.message,
              type: "warning"
            });
            this.modifyNum = 1;
          }
        })
        .catch(err => {
          this.$message.error(err.message);
          this.modifyNum = 1;
        })
    },
    // 结算
    settlement() {
      if (this.totalCount > 0) {
        let cart_ids = []
        this.cartList.forEach(siteItem => {
          siteItem.cartList.forEach(item => {
            if (item.checked) {
              cart_ids.push(item.cart_id)
            }
          })
        })

        if (cart_ids.length > 20) {
          this.$message({
            message: '购物车最多支持20个商品一起购买',
            type: "warning"
          });
          return;
        }

        var data = {
          cart_ids: cart_ids.toString()
        }
        this.$store.dispatch("order/setOrderCreateData", data)
        this.$router.push({
          path: "/order/payment"
        })
      }
    },
    imageError(siteIndex, cartIndex) {
      this.cartList[siteIndex].cartList[cartIndex].sku_image = this.defaultGoodsImage
    },
    imageErrorInvalid(index) {
      this.invalidGoods[index].sku_image = this.defaultGoodsImage
    }
  }
}