<template>
  <!-- 移动端布局 -->
  <el-form v-if="isMobile" ref="formRef" :model="formData" :rules="formRules" v-loading="formLoading" label-position="top" :inline-message="true" :disabled="disabled">
    <div class="mobile-item-list">
      <div
        v-for="(row, $index) in formData"
        :key="$index"
        class="mobile-item-card"
      >
        <div class="mobile-item-card__header">
          <span class="mobile-item-card__index">#{{ $index + 1 }}</span>
          <span class="mobile-item-card__name">{{ row.productName || '未选择产品' }}</span>
          <el-button
            :disabled="disabled || formData.length === 1"
            @click="handleDelete($index)"
            link
            type="danger"
            size="small"
          >
            删除
          </el-button>
        </div>
        <div class="mobile-item-card__body">
          <el-form-item
            label="产品"
            :prop="`${$index}.productId`"
            :rules="formRules.productId"
          >
            <el-select
              v-model="row.productId"
              clearable
              filterable
              @change="onChangeProduct($event, row)"
              placeholder="请选择产品"
              style="width: 100%"
            >
              <el-option
                v-for="item in productList"
                :key="item.id"
                :label="item.name"
                :value="item.id"
              />
            </el-select>
          </el-form-item>
          <div class="mobile-item-card__info-row">
            <span class="mobile-item-card__info-label">单位</span>
            <span class="mobile-item-card__info-value">{{ row.productUnitName || '-' }}</span>
          </div>
          <div class="mobile-item-card__input-group">
            <el-form-item label="计划销量" :prop="`${$index}.planCount`" :rules="formRules.planCount">
              <el-input-number
                v-model="row.planCount"
                controls-position="right"
                :min="0"
                :precision="4"
                style="width: 100%"
              />
            </el-form-item>
            <el-form-item label="单价" :prop="`${$index}.productPrice`" :rules="formRules.productPrice">
              <el-input-number
                v-model="row.productPrice"
                controls-position="right"
                :min="0"
                :precision="4"
                style="width: 100%"
              />
            </el-form-item>
          </div>
          <div class="mobile-item-card__info-row">
            <span class="mobile-item-card__info-label">金额</span>
            <span class="mobile-item-card__info-value">{{ erpPriceInputFormatter(row.totalPrice) }}</span>
          </div>
          <el-form-item label="备注" :prop="`${$index}.remark`">
            <el-input v-model="row.remark" placeholder="请输入备注" />
          </el-form-item>
        </div>
      </div>

      <!-- 合计 -->
      <div class="mobile-item-summary" v-if="formData.length > 0">
        <div class="mobile-item-summary__row">
          <span>合计数量</span>
          <span>{{ erpPriceInputFormatter(summaryData.planCount) }}</span>
        </div>
        <div class="mobile-item-summary__row mobile-item-summary__row--total">
          <span>合计金额</span>
          <span>{{ erpPriceInputFormatter(summaryData.totalPrice) }}</span>
        </div>
      </div>

      <div class="mobile-item-add" v-if="!disabled">
        <el-button @click="handleAdd" round>+ 添加计划产品</el-button>
      </div>
    </div>
  </el-form>

  <!-- PC端布局 -->
  <el-form v-if="!isMobile" ref="formRef" :model="formData" :rules="formRules" v-loading="formLoading" label-width="0px" :inline-message="true" :disabled="disabled">
    <el-table :data="formData" show-summary :summary-method="getSummaries" class="-mt-10px">
      <el-table-column label="序号" type="index" align="center" width="60" />
      <el-table-column label="产品名称" min-width="180"><template #default="{ row, $index }"><el-form-item :prop="`${$index}.productId`" :rules="formRules.productId" class="mb-0px!"><el-select v-model="row.productId" clearable filterable @change="onChangeProduct($event, row)" placeholder="请选择产品"><el-option v-for="item in productList" :key="item.id" :label="item.name" :value="item.id" /></el-select></el-form-item></template></el-table-column>
      <el-table-column label="单位" min-width="80"><template #default="{ row }"><el-form-item class="mb-0px!"><el-input disabled v-model="row.productUnitName" /></el-form-item></template></el-table-column>
      <el-table-column label="计划销量" prop="planCount" fixed="right" min-width="140"><template #default="{ row, $index }"><el-form-item :prop="`${$index}.planCount`" :rules="formRules.planCount" class="mb-0px!"><el-input-number v-model="row.planCount" controls-position="right" :min="0" :precision="4" class="!w-100%" /></el-form-item></template></el-table-column>
      <el-table-column label="单价" fixed="right" min-width="120"><template #default="{ row, $index }"><el-form-item :prop="`${$index}.productPrice`" :rules="formRules.productPrice" class="mb-0px!"><el-input-number v-model="row.productPrice" controls-position="right" :min="0" :precision="4" class="!w-100%" /></el-form-item></template></el-table-column>
      <el-table-column label="金额" prop="totalPrice" fixed="right" min-width="120"><template #default="{ row, $index }"><el-form-item :prop="`${$index}.totalPrice`" class="mb-0px!"><el-input disabled v-model="row.totalPrice" :formatter="erpPriceInputFormatter" /></el-form-item></template></el-table-column>
      <el-table-column label="备注" min-width="150"><template #default="{ row, $index }"><el-form-item :prop="`${$index}.remark`" class="mb-0px!"><el-input v-model="row.remark" placeholder="请输入备注" /></el-form-item></template></el-table-column>
      <el-table-column align="center" fixed="right" label="操作" width="60"><template #default="{ $index }"><el-button @click="handleDelete($index)" link>—</el-button></template></el-table-column>
    </el-table>
  </el-form>
  <el-row v-if="!isMobile && !disabled" justify="center" class="mt-3"><el-button @click="handleAdd" round>+ 添加计划产品</el-button></el-row>
</template>
<script setup lang="ts">
import { ref, reactive, computed, watch, onMounted } from 'vue'
import { ProductApi, ProductVO } from '@/api/erp/product/product'
import { erpPriceInputFormatter, erpPriceMultiply, getSumValue } from '@/utils'
import { useWindowSize } from '@vueuse/core'

const { width } = useWindowSize()
const isMobile = computed(() => width.value < 768)

const props = defineProps<{
  items: undefined
  disabled: false
}>()
const formLoading = ref(false) // 表单的加载中
const formData = ref([])
const formRules = reactive({
  productId: [{ required: true, message: '产品不能为空', trigger: 'blur' }],
  planCount: [{ required: true, message: '计划销量不能为空', trigger: 'blur' }],
  productPrice: [{ required: true, message: '单价不能为空', trigger: 'blur' }]
})
const formRef = ref([]) // 表单 Ref
const productList = ref<ProductVO[]>([]) // 产品列表

/** 初始化设置计划项 */
watch(
  () => props.items,
  async (val) => {
    formData.value = val
  },
  { immediate: true }
)

/** 监听计划产品变化，计算金额 */
watch(
  () => formData.value,
  (val) => {
    if (!val || val.length === 0) {
      return
    }
    // 循环处理
    val.forEach((item) => {
      item.totalPrice = erpPriceMultiply(item.productPrice, item.planCount)
    })
  },
  { deep: true }
)

/** 合计 - 移动端 */
const summaryData = computed(() => {
  return {
    planCount: getSumValue(formData.value.map((item) => Number(item.planCount))),
    totalPrice: getSumValue(formData.value.map((item) => Number(item.totalPrice)))
  }
})

/** 合计 - PC端 */
const getSummaries = (param: SummaryMethodProps) => {
  const { columns, data } = param
  const sums: string[] = []
  columns.forEach((column, index: number) => {
    if (index === 0) { sums[index] = '合计'; return }
    if (['planCount', 'totalPrice'].includes(column.property)) {
      const sum = getSumValue(data.map((item) => Number(item[column.property])))
      sums[index] = erpPriceInputFormatter(sum)
    } else { sums[index] = '' }
  })
  return sums
}

/** 新增按钮操作 */
const handleAdd = () => {
  const row = {
    id: undefined,
    productId: undefined,
    productUnitName: undefined, // 产品单位
    planCount: 0,
    productPrice: undefined,
    totalPrice: undefined,
    remark: undefined
  }
  formData.value.push(row)
}

/** 删除按钮操作 */
const handleDelete = (index: number) => {
  formData.value.splice(index, 1)
}

/** 处理产品变更 */
const onChangeProduct = (productId, row) => {
  const product = productList.value.find((item) => item.id === productId)
  if (product) {
    row.productName = product.name
    row.productUnitName = product.unitName
    row.productPrice = product.salePrice
  }
}

/** 表单校验 */
const validate = () => {
  return formRef.value.validate()
}
defineExpose({ validate })

/** 初始化 */
onMounted(async () => {
  productList.value = await ProductApi.getProductSimpleList()
  // 默认添加一个
  if (formData.value.length === 0) {
    handleAdd()
  }
})
</script>

<style lang="scss" scoped>
.mobile-item-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.mobile-item-card {
  background: #f9fafb;
  border-radius: 8px;
  border: 1px solid #ebeef5;
  overflow: hidden;
  &__header {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    background: #f0f2f5;
    gap: 8px;
  }
  &__index {
    font-size: 13px;
    font-weight: 600;
    color: #409eff;
    flex-shrink: 0;
  }
  &__name {
    flex: 1;
    font-size: 14px;
    font-weight: 500;
    color: #303133;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  &__body {
    padding: 10px 12px;
  }
  &__info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4px 0;
    font-size: 13px;
  }
  &__info-label {
    color: #909399;
    flex-shrink: 0;
  }
  &__info-value {
    color: #606266;
    text-align: right;
  }
  &__input-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }
}
.mobile-item-summary {
  background: #fff;
  border-radius: 8px;
  border: 1px solid #ebeef5;
  padding: 10px 12px;
  &__row {
    display: flex;
    justify-content: space-between;
    padding: 4px 0;
    font-size: 13px;
    color: #606266;
    &--total {
      font-weight: 600;
      color: #303133;
      border-top: 1px solid #ebeef5;
      padding-top: 8px;
      margin-top: 4px;
    }
  }
}
.mobile-item-add {
  text-align: center;
  padding: 8px 0;
}
</style>
