<template>
  <view class="goods-sku-popup popup" catchtouchmove="true" :class="(value && complete) ? 'show' : 'none'"
    @touchmove.stop.prevent="moveHandle">
    <!-- 页面内容开始 -->
    <view class="mask" @click="close('mask')"></view>
    <!-- 页面开始 -->
    <view class="layer attr-content" :style="'border-radius: '+borderRadius+'rpx '+borderRadius+'rpx 0 0;'">
      <view class="specification-wrapper">
        <scroll-view class="specification-wrapper-content" scroll-y="true">
          <view class="specification-header">
            <view class="specification-left">
              <image class="product-img" :src="selectShop.image ? selectShop.image : goodsInfo[goodsThumbName]"
                mode="aspectFill"></image>
            </view>
            <view class="specification-right">
              <view class="price-content" :style="'color: '+priceColor+' ;'">
                <text class="sign">¥</text>
                <text class="price">{{ (selectShop.price || defaultPrice) | priceFilter }}</text>
              </view>
              <view class="inventory">{{ stockText }}：{{ selectShop[stockName] || defaultStock }}</view>
              <view class="choose" v-show="goodsInfo[specListName] && goodsInfo[specListName][0].name !== defaultSingleSkuName">
                <text v-if="!selectArr.every(val => val == '')">已选：{{ selectArr.join(' ') }}</text>
              </view>
            </view>
          </view>

          <view class="specification-content">
            <view v-show="goodsInfo[specListName][0].name !== defaultSingleSkuName" class="specification-item" v-for="(item, index1) in goodsInfo[specListName]" :key="index1">
              <view class="item-title">{{ item.name }}</view>
              <view class="item-wrapper">
                <view class="item-content" @tap="skuClick(item_value, index1, $event, index2)" v-for="(item_value, index2) in item.list"
                  :key="index2" :class="[item_value.ishow ? '' : 'noactived', subIndex[index1] == index2 ? 'actived' : '']"
                  :style="[item_value.ishow ? '' : disableStyle,
                                                    item_value.ishow ? btnStyle :'',
                                                    subIndex[index1] == index2 ? activedStyle : ''
                                    ]">
                  {{ item_value.name }}
                </view>
              </view>
            </view>
            <view style="display: flex;">
              <view style="flex: 1;">
                <text style="font-size: 26rpx; color: #333; line-height: 50rpx;">数量</text>
              </view>
              <view style="flex: 4;text-align: right;">
                <number-box :min="minBuyNum" :max="maxBuyNum" :step="stepBuyNum" v-model="selectNum"
                  :positive-integer="true">
                </number-box>
              </view>
            </view>

          </view>
        </scroll-view>
        <view class="close" @click="close('close')" v-if="showClose">
          <image class="close-item" :src="closeImage"></image>
        </view>
      </view>
      <view class="btn-option">
          <view class="btn-wrapper" v-if="outFoStock || mode == 4">
            <view class="sure" style="color:#ffffff;background-color:#cccccc">{{ noStockText }}</view>
          </view>
          <view class="btn-wrapper" v-else-if="mode == 1">
            <view class="sure add-cart" style="border-radius:38rpx 0rpx 0rpx 38rpx;" @click="addCart" :style="'color:'+addCartColor+';background:'+addCartBackgroundColor">{{ addCartText }}</view>
            <view class="sure" style="border-radius:0rpx 38rpx 38rpx 0rpx;" @click="buyNow" :style="'color:'+buyNowColor+';background-color:'+buyNowBackgroundColor">{{ buyNowText }}</view>
          </view>
          <view class="btn-wrapper" v-else-if="mode == 2">
            <view class="sure add-cart" @click="addCart" :style="'color:'+addCartColor+';background:'+addCartBackgroundColor">{{ addCartText }}</view>
          </view>
          <view class="btn-wrapper" v-else-if="mode == 3">
            <view class="sure" @click="buyNow" :style="'color:'+buyNowColor+';background:'+buyNowBackgroundColor">{{ buyNowText }}</view>
          </view>
      </view>
      <!-- 页面结束 -->
    </view>
    <!-- 页面内容结束 -->
  </view>
</template>

<script>
  import NumberBox from './number-box'

  var that; // 当前页面对象
  var vk; // 自定义函数集
  export default {
    name: 'GoodsSkuPopup',
    components: {
      NumberBox
    },
    props: {
      // true 组件显示 false 组件隐藏
      value: {
        Type: Boolean,
        default: false
      },
      // vk云函数路由模式参数开始-----------------------------------------------------------
      // 商品id
      goodsId: {
        Type: String,
        default: ""
      },
      // vk路由模式框架下的云函数地址
      action: {
        Type: String,
        default: ""
      },
      // vk云函数路由模式参数结束-----------------------------------------------------------
      // 该商品已抢完时的按钮文字
      noStockText: {
        Type: String,
        default: "该商品已抢完"
      },
      // 库存文字
      stockText: {
        Type: String,
        default: "库存"
      },
      // 商品表id的字段名
      goodsIdName: {
        Type: String,
        default: "_id"
      },
      // sku表id的字段名
      skuIdName: {
        Type: String,
        default: "_id"
      },
      // sku_list的字段名
      skuListName: {
        Type: String,
        default: "sku_list"
      },
      // spec_list的字段名
      specListName: {
        Type: String,
        default: "spec_list"
      },
      // stock的字段名
      stockName: {
        Type: String,
        default: "stock"
      },
      // sku_name的字段名
      skuName: {
        Type: String,
        default: "sku_name"
      },
      // sku组合路径的字段名
      skuArrName: {
        Type: String,
        default: "sku_name_arr"
      },
      // 默认单规格时的规格组名称
      defaultSingleSkuName: {
        Type: String,
        default: "默认"
      },
      // 模式 1:都显示  2:只显示购物车 3:只显示立即购买 4:显示缺货按钮 默认 1
      mode: {
        Type: Number,
        default: 1
      },
      // 点击遮罩是否关闭组件 true 关闭 false 不关闭 默认true
      maskCloseAble: {
        Type: Boolean,
        default: true
      },
      // 顶部圆角值
      borderRadius: {
        Type: [String, Number],
        default: 0
      },
      // 商品缩略图字段名(未选择sku时)
      goodsThumbName: {
        Type: [String],
        default: "goods_thumb"
      },
      // 最小购买数量
      minBuyNum: {
        Type: Number,
        default: 1
      },
      // 最大购买数量
      maxBuyNum: {
        Type: Number,
        default: 100000
      },
      // 每次点击后的数量
      stepBuyNum: {
        Type: Number,
        default: 1
      },
      // 自定义获取商品信息的函数
      customAction: {
        Type: [Function],
        default: null
      },
      // 价格的字体颜色
      priceColor: {
        Type: String,
        default: "#fe560a"
      },
      // 立即购买按钮的文字
      buyNowText: {
        Type: String,
        default: "立即购买"
      },
      // 立即购买按钮的字体颜色
      buyNowColor: {
        Type: String,
        default: "#ffffff"
      },
      // 立即购买按钮的背景颜色
      buyNowBackgroundColor: {
        Type: String,
       default: "linear-gradient(to right, $fuint-theme, $fuint-theme)"
      },
      // 加入购物车按钮的文字
      addCartText: {
        Type: String,
        default: "加入购物车"
      },
      // 加入购物车按钮的字体颜色
      addCartColor: {
        Type: String,
        default: "#ffffff"
      },
      // 加入购物车按钮的背景颜色
      addCartBackgroundColor: {
        Type: String,
        default: "linear-gradient(to right, $fuint-theme, $fuint-theme)"
      },
      // 不可点击时,按钮的样式
      disableStyle: {
        Type: Object,
        default: null
      },
      // 按钮点击时的样式
      activedStyle: {
        Type: Object,
        default: null
      },
      // 按钮常态的样式
      btnStyle: {
        Type: Object,
        default: null
      },
      // 是否显示右上角关闭按钮
      showClose: {
        Type: Boolean,
        default: true
      },
      // 关闭按钮的图片地址
      closeImage: {
        Type: String,
        default: "https://img.alicdn.com/imgextra/i1/121022687/O1CN01ImN0O11VigqwzpLiK_!!121022687.png"
      },
      // 默认库存数量 (未选择sku时)
      defaultStock: {
        Type: Number,
        default: 0
      },
      // 默认显示的价格 (未选择sku时)
      defaultPrice: {
        Type: Number,
        default: 0
      },
    },
    data() {
      return {
        complete: false, // 组件是否加载完成
        goodsInfo: {}, // 商品信息
        isShow: false, // true 显示 false 隐藏
        initKey: true, // 是否已初始化
        shopItemInfo: {}, // 存放要和选中的值进行匹配的数据
        selectArr: [], // 存放被选中的值
        subIndex: [], // 是否选中 因为不确定是多规格还是单规格，所以这里定义数组来判断
        selectShop: {}, // 存放最后选中的商品
        selectNum: this.minBuyNum, // 选中数量
        outFoStock: false, // 是否全部sku都缺货
      };
    },
    mounted() {
      that = this;
      vk = that.vk;
      if (that.value) {
          that.open();
      }
    },
    methods: {
      // 初始化
      init() {
        // 清空之前的数据
        that.selectArr = [];
        that.subIndex = [];
        that.selectShop = {};
        that.selectNum = that.minBuyNum;
        that.outFoStock = false;
        that.shopItemInfo = {};

        let specListName = that.specListName;
        that.goodsInfo[specListName].map(item => {
             that.selectArr.push('');
             that.subIndex.push(-1);
        });

        that.checkItem(); // 计算sku里面规格形成路径
        that.checkInpath(-1); // 传-1是为了不跳过循环
        that.autoClickSku(); // 自动选择sku策略
      },
      // 使用vk路由模式框架获取商品信息
      findGoodsInfo() {
        if (typeof vk == "undefined") {
            that.toast("custom-action必须是function");
            return false;
        }
        vk.callFunction({
          url: that.action,
          title: '请求中...',
          data: {
            goods_id: that.goodsId
          },
          success(data) {
            that.updateGoodsInfo(data.goodsInfo);
          }
        });
      },
      // 更新商品信息(库存、名称、图片)
      updateGoodsInfo(goodsInfo) {
        let skuListName = that.skuListName;
        if (JSON.stringify(that.goodsInfo) === "{}" || that.goodsInfo[that.goodsIdName] !== goodsInfo[that.goodsIdName]) {
            that.goodsInfo = goodsInfo;
            that.initKey = true;
        } else {
            that.goodsInfo[skuListName] = goodsInfo[skuListName];
        }
        if (that.initKey) {
            that.initKey = false;
            that.init();
        }
        // 更新选中sku的库存信息
        let select_sku_info = that.getListItem(that.goodsInfo[skuListName], that.skuIdName, that.selectShop[that.skuIdName]);
        Object.assign(that.selectShop, select_sku_info);
        that.complete = true;
        that.$emit("open", true);
        that.$emit("input", true);
      },
      async open() {
        let findGoodsInfoRun = true;
        let skuListName = that.skuListName;
        if (that.customAction && typeof(that.customAction) === 'function') {
          let goodsInfo = await that.customAction();
          if (goodsInfo && typeof goodsInfo == "object" && JSON.stringify(goodsInfo) != "{}") {
              findGoodsInfoRun = false;
              that.updateGoodsInfo(goodsInfo);
          } else {
              that.toast("无法获取到商品信息");
              that.$emit("input", false);
              return false;
          }
        } else {
          if (findGoodsInfoRun) {
              that.findGoodsInfo();
          }
        }
      },
      // 监听 - 弹出层收起
      close(s) {
        if (s == "close") {
          that.$emit("input", false);
          that.$emit("close", "close");
        } else if (s == "mask") {
          if (that.maskCloseAble) {
            that.$emit("input", false);
            that.$emit("close", "mask");
          }
        }
      },
      moveHandle() {
        //禁止父元素滑动
      },
      // sku按钮的点击事件
      skuClick(value, index1, event, index2) {
        if (value.ishow) {
          if (that.selectArr[index1] != value.name) {
              that.$set(that.selectArr, index1, value.name);
              that.$set(that.subIndex, index1, index2);
          } else {
              that.$set(that.selectArr, index1, '');
              that.$set(that.subIndex, index1, -1);
          }
          that.checkInpath(index1);
          // 如果全部选完
          that.checkSelectShop();
        }
      },
      // 检测是否已经选完sku
      checkSelectShop() {
        // 如果全部选完
        if (that.selectArr.every(item => item != '')) {
            that.selectShop = that.shopItemInfo[that.selectArr];
            that.selectNum = that.minBuyNum;
        } else {
            that.selectShop = {};
        }
      },
      // 检查路径
      checkInpath(clickIndex) {
        let specListName = that.specListName;
        //循环所有属性判断哪些属性可选
        //当前选中的兄弟节点和已选中属性不需要循环
        let specList = that.goodsInfo[specListName];
        for (let i = 0, len = specList.length; i < len; i++) {
          if (i == clickIndex) {
              continue;
          }
          let len2 = specList[i].list.length;
          for (let j = 0; j < len2; j++) {
            if (that.subIndex[i] != -1 && j == that.subIndex[i]) {
                continue;
            }
            let choosed_copy = [...that.selectArr];
            that.$set(choosed_copy, i, specList[i].list[j].name);
            let choosed_copy2 = choosed_copy.filter(item => item !== '' && typeof item !== 'undefined');
            if (that.shopItemInfo.hasOwnProperty(choosed_copy2)) {
                specList[i].list[j].ishow = true;
            } else {
                specList[i].list[j].ishow = false;
            }
          }
        }
        that.$set(that.goodsInfo, specListName, specList);
      },
      // 计算sku里面规格形成路径
      checkItem() {
        let skuListName = that.skuListName;
        // console.time('计算有多小种可选路径需要的时间是');
        // 去除库存小于等于0的商品sku
        let skuList = that.goodsInfo[skuListName];
        let stockNum = 0;
        for (let i = 0; i < skuList.length; i++) {
          if (skuList[i][that.stockName] <= 0) {
              skuList.splice(i, 1);
              i--;
          } else {
              stockNum += skuList[i][that.stockName];
          }
        }
        if (stockNum <= 0) {
            that.outFoStock = true;
        }
        // 计算有多小种可选路径
        let result = skuList.reduce(
          (arrs, items) => {
            return arrs.concat(
              items[that.skuArrName].reduce(
                (arr, item) => {
                  return arr.concat(
                    arr.map(item2 => {
                      // 利用对象属性的唯一性实现二维数组去重
                      if (!that.shopItemInfo.hasOwnProperty([...item2, item])) {
                          that.shopItemInfo[[...item2, item]] = items;
                      }
                      return [...item2, item];
                    })
                  );
                },
                [
                  []
                ]
              )
            );
          },
          [
            []
          ]
        );
      },
      // 检测sku选项是否已全部选完,且有库存
      checkSelectComplete(obj = {}) {
        let selectShop = that.selectShop;
        if (selectShop && selectShop[that.skuIdName] !== undefined) {
          // 判断库存
          if (that.selectNum <= selectShop[that.stockName]) {
            if (typeof obj.success == "function") obj.success(selectShop);
          } else {
            that.toast(that.stockText + "不足", "none")
          }
        } else {
          that.toast("请先选择对应规格", "none");
        }
      },
      // 加入购物车
      addCart() {
        that.checkSelectComplete({
          success: function(selectShop) {
            selectShop.buy_num = that.selectNum;
            that.$emit("add-cart", selectShop);
          }
        });
      },
      // 立即购买
      buyNow() {
        that.checkSelectComplete({
          success: function(selectShop) {
            selectShop.buy_num = that.selectNum;
            that.$emit("buy-now", selectShop);
          }
        });
      },
      // 弹窗
      toast(title, icon) {
        uni.showToast({
          title: title,
          icon: icon
        });
      },
      // 获取对象数组中的某一个item,根据指定的键值
      getListItem(list, key, value) {
        let item;
        for (let i in list) {
          if (typeof value == "object") {
            if (JSON.stringify(list[i][key]) === JSON.stringify(value)) {
                item = list[i];
                break;
            }
          } else {
            if (list[i][key] === value) {
                item = list[i];
                break;
            }
          }
        }
        return item;
      },
      // 自动选择sku前提是只有一组sku,默认自动选择最前面的有库存的sku
      autoClickSku() {
        let skuList = that.goodsInfo[that.skuListName];
        let specListArr = that.goodsInfo[that.specListName];
        
        if (specListArr.length == 1) {
          let specList = specListArr[0].list;
        
          for (let i = 0; i < specList.length; i++) {
            let sku = that.getListItem(skuList, that.skuArrName, [specList[i].name]);
            if (sku) {
                that.skuClick(specList[i], 0, {}, i);
                break;
            }
          }
        }
      }
    },
    // 过滤器
    filters: {
      // 金额显示过滤器
      priceFilter(n = 0) {
        if (typeof n == "string") {
            n = parseFloat(n)
        }
        return n ? n.toFixed(2) : n
      }
    },
    // 计算属性
    computed: {

    },
    watch: {
      value: function(val) {
        if (val) {
            that.open();
        }
      },
    }
  };
</script>

<style lang="scss" scoped>
  /*  sku弹出层 */
  .goods-sku-popup {
    position: fixed;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 999999999999;
    overflow: hidden;
    &.show {
      display: block;

      .mask {
        animation: showPopup 0.2s linear both;
      }

      .layer {
        animation: showLayer 0.2s linear both;
      }
    }

    &.hide {
      .mask {
        animation: hidePopup 0.2s linear both;
      }

      .layer {
        animation: hideLayer 0.2s linear both;
      }
    }

    &.none {
      display: none;
    }

    .mask {
      position: fixed;
      top: 0;
      width: 100%;
      height: 100%;
      z-index: 1;
      background-color: rgba(0, 0, 0, 0.65);
    }

    .layer {
      display: flex;
      width: 100%;
      max-height: 1200rpx;
      flex-direction: column;
      position: fixed;
      z-index: 999999;
      bottom: 0;
      border-radius: 10rpx 10rpx 0 0;
      background-color: #ffffff;
      margin-top: 10rpx;
      overflow-y: scroll;
      .btn-option {
          padding: 1rpx;
          display: block;
          clear: both;
          margin-bottom: 60rpx;
      }
      .specification-wrapper {
        width: 100%;
        margin-top: 20rpx;
        padding: 30rpx 25rpx;
        box-sizing: border-box;
        .specification-wrapper-content {
          width: 100%;
          min-height: 300rpx;

          &::-webkit-scrollbar {
            /*隐藏滚轮*/
            display: none;
          }

          .specification-header {
            width: 100%;
            display: flex;
            flex-direction: row;
            position: relative;
            margin-bottom: 40rpx;

            .specification-left {
              width: 180rpx;
              height: 180rpx;
              flex: 0 0 180rpx;

              .product-img {
                width: 180rpx;
                height: 180rpx;
                background-color: #999999;
              }
            }

            .specification-right {
              flex: 1;
              padding: 0 35rpx 10rpx 28rpx;
              box-sizing: border-box;
              display: flex;
              flex-direction: column;
              justify-content: flex-end;
              font-weight: 500;

              .price-content {
                color: #fe560a;
                margin-bottom: 10rpx;

                .sign {
                  font-size: 28rpx;
                  margin-right: 4rpx;
                }

                .price {
                  font-size: 44rpx;
                }
              }

              .inventory {
                font-size: 24rpx;
                color: #525252;
                margin-bottom: 14rpx;
              }

              .choose {
                font-size: 24rpx;
                color: #525252;
                min-height: 32rpx;
              }
            }
          }

          .specification-content {
            font-weight: 500;
            .specification-item {
              margin-bottom: 40rpx;

              &:last-child {
                margin-bottom: 0;
              }

              .item-title {
                margin-bottom: 15rpx;
                font-size: 32rpx;
                font-weight: bold;
                color: #000000;
              }

              .item-wrapper {
                display: flex;
                flex-direction: row;
                flex-flow: wrap;
                margin-bottom: -20rpx;

                .item-content {
                  display: block;
                  padding: 10rpx 20rpx;
                  min-width: 110rpx;
                  text-align: center;
                  font-size: 24rpx;
                  border-radius: 30rpx;
                  background-color: #ffffff;
                  color: #333333;
                  margin-right: 20rpx;
                  margin-bottom: 20rpx;
                  border: 2rpx solid #cccccc;
                  box-sizing: border-box;

                  &.actived {
                    border-color: #fe560a;
                    color: #fe560a;
                  }

                  &.noactived {
                    // background-color: #e4e4e4;
                    // border-color: #e4e4e4;
                    // color: #9e9e9e;
                    // text-decoration: line-through;
                    color: #c8c9cc;
                    background: #f2f3f5;
                    border-color: #f2f3f5;
                  }
                }
              }
            }
          }
        }

        .close {
          position: absolute;
          top: 30rpx;
          right: 25rpx;
          width: 50rpx;
          height: 50rpx;
          text-align: center;
          line-height: 50rpx;

          .close-item {
            width: 40rpx;
            height: 40rpx;
          }
        }
      }

      .btn-wrapper {
        display: flex;
        width: 100%;
        height: 120rpx;
        flex: 0 0 120rpx;
        align-items: center;
        justify-content: space-between;
        padding: 0 26rpx;
        box-sizing: border-box;

        .layer-btn {
          width: 335rpx;
          height: 80rpx;
          border-radius: 40rpx;
          color: #fff;
          line-height: 80rpx;
          text-align: center;
          font-weight: 500;
          font-size: 28rpx;

          &.add-cart {
            background: #ffbe46;
          }

          &.buy {
            background: #fe560a;
          }
        }

        .sure {
          width: 698rpx;
          height: 80rpx;
          border-radius: 38rpx;
          color: #fff;
          line-height: 80rpx;
          text-align: center;
          font-weight: 500;
          font-size: 28rpx;
          background: #fe560a;
        }

        .sure.add-cart {
          background: #ff9402;
        }
      }
    }

    @keyframes showPopup {
      0% {
        opacity: 0;
      }

      100% {
        opacity: 1;
      }
    }

    @keyframes hidePopup {
      0% {
        opacity: 1;
      }

      100% {
        opacity: 0;
      }
    }

    @keyframes showLayer {
      0% {
        transform: translateY(120%);
      }

      100% {
        transform: translateY(0%);
      }
    }

    @keyframes hideLayer {
      0% {
        transform: translateY(0);
      }

      100% {
        transform: translateY(120%);
      }
    }
  }
</style>