import { ref, computed } from "vue";
import { onLoad } from "@dcloudio/uni-app";
import peach from "@/peach";
import GoodsApi from "@/peach/api/trade/goods";
import { SPEC_TYPE, SKU_RULE_CONFIG } from "./config";

const pickerRef = ref(null);

// 多属性商品 sku 列表
const skus = ref([]);

const propertyList = ref([]);

const goodsPropertyList = ref([]);

const propertyListRef = ref(null);

const canEdit = computed(() => peach.$store("trade").canEdit);

const formData = ref({
  specType: true,
  specText: SPEC_TYPE[0].label,
});

async function showPropertyList() {
  await getGoodsProperty();
  propertyListRef.value.onOpen();
}

function onRDPickerConfirm(e) {
  formData.value.specType = SPEC_TYPE[e.value[0]].value;
  formData.value.specText = SPEC_TYPE[e.value[0]].label;

  // 如果商品规格不一致，则需要重新初始化 sku 列表
  initSku();

  peach.$store("trade").specType = SPEC_TYPE[e.value[0]].value;
}

function pickerProperty() {
  if (canEdit.value) {
    let index = formData.value.specType ? 1 : 0;

    console.log(index);

    pickerRef.value.onOpen([index]);
  }
}

async function onPropertyConfirm(e) {
  await getGoodsProperty();
  console.log(e);
}

function onConfirm() {
  console.log(skus.value);
}

async function getGoodsProperty() {
  let { data } = await GoodsApi.getHistoryProperty();

  // 把 propertyList 中 id 相同的属性合并，并去重
  propertyList.value = peach.$store("trade").selectedProperty;

  console.log(propertyList.value);

  if (propertyList.value) {
    // 根据已经选择数据，设置默认选中
    data.forEach((item) => {
      // 判断属性是否已经选中
      let propertyParent = propertyList.value.find(
        (sitem) => sitem?.id === item.id
      );

      item.checked = propertyParent ? true : false;

      // 如果属性已经选中，查询子类中是否有选中
      if (item.checked) {
        item.propertyValues.forEach((child) => {
          let childResult = propertyParent?.children.some(
            (schild) => schild === child.id
          );
          child.checked = childResult ? true : false;
        });
      }
    });

    goodsPropertyList.value = data;
  } else {
    goodsPropertyList.value = [];
  }

  console.log(goodsPropertyList.value);
}

function changeSubProperty() {
  // 修改子属性状态，需要同步更新 skus 的显示
  console.log(goodsPropertyList.value);
  // 过滤父属性 checked 选项，深拷贝避免后面循环改变元数据内容
  let temp = JSON.parse(
    JSON.stringify(goodsPropertyList.value.filter((item) => item.checked))
  );
  temp.forEach((item) => {
    item.propertyValues = item.propertyValues.filter((child) => child.checked);
  });

  let result = temp.map((item) => {
    return item.propertyValues.map((child) => ({
      propertyId: item.id,
      propertyName: item.name,
      valueId: child.id,
      valueName: child.name,
    }));
  });

  let tempSkus = [];

  for (let item of reduceArr(result)) {
    let obj = {
      picUrl: "",
      barCode: "",
      price: 0,
      marketPrice: 0,
      costPrice: 0,
      stock: 0,
      weight: 0,
      volume: 0,
      properties: item,
    };
    tempSkus.push(obj);
  }

  skus.value = tempSkus;
}

/**
 * @author Ankkaya
 * @description 新增商品初始化商品 sku
 * @param {Type}  -
 * @returns {Type}
 */
function initSku() {
  // 单规格
  if (!formData.value.specType) {
    let obj = {
      picUrl: "",
      barCode: "",
      price: 0,
      marketPrice: 0,
      costPrice: 0,
      stock: 0,
      weight: null,
      volume: null,
      properties: [
        {
          propertyId: 0,
          propertyName: "默认",
          valueId: 0,
          valueName: "默认",
        },
      ],
    };

    skus.value = [obj];
  } else {
    // 多规格
    skus.value = [];
  }
}

/**
 * @author Ankkaya
 * @description 确认属性
 * @param {Type}  -
 * @returns {Type}
 */
function submitProperty() {
  try {
    validateSku(skus.value);
    peach.$store("trade").skus = skus.value;
    peach.$router.back();
  } catch (e) {
    console.log(skus.value);
    console.log(e, "校验失败");
  }
}

function validateSku(skus) {
  let warningInfo = "请检查商品各行相关属性配置，";
  let validateStatue = true;
  let skusValue = skus ?? peach.$store("trade").skus;

  // 判断如果是多规格，并且 skusValue 为空 []，则提示
  if (formData.value.specType && skusValue.length < 1) {
    uni.showToast({
      title: "请选择商品规格",
      icon: "none",
      duration: 4000,
    });
    throw new Error("请选择商品规格");
  }
  for (const sku of skusValue) {
    for (const rule of SKU_RULE_CONFIG) {
      const arg = getValue(sku, rule.name);
      if (!rule.rule(arg)) {
        validateStatue = false;
        warningInfo += rule.message;
        break;
      }
    }
    if (!validateStatue) {
      uni.showToast({
        title: warningInfo,
        icon: "none",
        duration: 4000,
      });
      throw new Error(warningInfo);
    }
  }
}

function getValue(obj, arg) {
  const keys = arg.split(".");
  let value = obj;
  for (const key of keys) {
    if (value && typeof value === "object" && key in value) {
      value = value[key];
    } else {
      value = undefined;
      break;
    }
  }
  return value;
}

function reduceArr(arr) {
  return arr.reduce((acc, cur) => {
    let tempAcc = [];

    if (acc.length < 1) {
      cur.forEach((item, index) => {
        if (tempAcc[index]) {
          tempAcc[index].push(item);
        } else {
          tempAcc[index] = [item];
        }
      });
    } else {
      acc.forEach((item, index) => {
        cur.forEach((sitem, sindex) => {
          tempAcc.push([...item, sitem]);
        });
      });

      if (cur.length < 1) {
        tempAcc = acc;
      }
    }
    return tempAcc;
  }, []);
}

const specType = computed(
  () => peach.$store("trade").goodsInfo?.specType || false
);

function initial() {
  onLoad(() => {
    formData.value.specType = specType.value ? true : false;
    formData.value.specText = SPEC_TYPE[specType.value ? 1 : 0].label;
    skus.value = JSON.parse(JSON.stringify(peach.$store("trade").skus));
    // 如果新增商品 sku，并且是单规格，初始化 sku

    if (!skus.value) {
      initSku();
    }
    if (specType.value) {
      getGoodsProperty();
    }
  });
}

export {
  initial,
  canEdit,
  skus,
  pickerRef,
  pickerProperty,
  validateSku,
  onConfirm,
  submitProperty,
  propertyListRef,
  formData,
  onRDPickerConfirm,
  onPropertyConfirm,
  propertyList,
  showPropertyList,
  goodsPropertyList,
  changeSubProperty,
};