<template>
  <div class="component-container">
    <div class="component-container__main">
      <el-cascader-panel ref="categoryRef" :options="categoryOptions" v-model="goodsInfo.categoryId"
        :props="{ emitPath: false }" @change="handleCategoryChange" />
      <div style="margin-top: 20px">
        <el-link type="info" :underline="false" v-show="pathLabels.length > 0">您选择的商品分类:</el-link>
        <el-link type="danger" :underline="false" v-for="(item, index) in pathLabels" :key="index"
          style="margin-left: 5px">
          {{ item }}
          <CaretRight v-show="index < pathLabels.length - 1" style="width: 1em; height:1em;margin-left: 5px" />
        </el-link>
      </div>

    </div>
    <div class="component-container__footer">
      <el-button type="primary" @click="handleNext">下一步，填写商品信息</el-button>
    </div>
  </div>
</template>

<script setup lang="ts">
import { onMounted, nextTick, reactive, ref, toRefs } from "vue";
import { ElCascaderPanel, ElMessage } from "element-plus";
import { CaretRight } from '@element-plus/icons-vue';

// API 引用
import { listCascadeCategories } from "@/api/pms/category";
import { computed } from "@vue/reactivity";
import { GoodsDetail } from "@/types";

const emit = defineEmits(['next', "update:modelValue"])
const props = defineProps({
  modelValue: {
    type: Object,
    default: () => {   }
  }
})

const goodsInfo: any = computed({
  get: () => props.modelValue,
  set: (value) => {
    emit('update:modelValue', value)
  }
})

const state = reactive({
  categoryOptions: [],
  pathLabels: []
})

const { categoryOptions, pathLabels } = toRefs(state)

function loadData() {
  listCascadeCategories().then(response => {
    state.categoryOptions = response.data
    if (goodsInfo.value.id) {
      nextTick(() => {
        handleCategoryChange()
      })
    }
  })
}
const categoryRef = ref(ElCascaderPanel)

function handleCategoryChange() {
  const checkNode = categoryRef.value.getCheckedNodes()[0]
  state.pathLabels = checkNode.pathLabels // 商品分类选择层级提示
  goodsInfo.value.categoryId = checkNode.value
}

function handleNext() {
  if (!goodsInfo.value.categoryId) {
    ElMessage.warning('请选择商品分类')
    return false
  }
  emit('next')
}

onMounted(() => {
  loadData()
})

</script>

<style lang="scss" scoped>
.component-container {
  &__main {
    margin: 20px auto
  }

  &__footer {
    position: fixed;
    bottom: 20px;
    right: 20px;
  }
}
</style>
