/**
* @file index.vue
* @description: 下拉表格选择
* @author: w
* @since: 2026-06-18
*/
<template>
  <div class="dropdown-table-select" :style="{ width: inputWidth }">
    <el-dropdown ref="dropdownRef" trigger="manual" placement="bottom-start" style="width:100%">
      <div class="input-wrap" style="width:100%">
        <el-input v-model="inputText" :placeholder="placeholder" @keydown.enter.prevent="handleInputEnter" />
        <span class="arrow-icon" @click.stop="toggleDropdown">
          <el-icon>
            <ArrowDown />
          </el-icon>
        </span>
      </div>
      <template #dropdown>
        <div class="table-panel" :style="{ width: panelWidth }">
          <el-table :data="tableData" border :height="tableHeight" @row-click="handleRowClick" v-loading="tableLoading">
            <el-table-column v-for="col in columnList" :key="col.prop" :label="col.label" :prop="col.prop"
              :width="col.width" :align="col.align || 'center'" />
          </el-table>
        </div>
      </template>
    </el-dropdown>
  </div>
</template>
<script setup lang="ts">

export interface TableColumnItem {
  label: string
  prop: string
  width?: string
  align?: 'left' | 'center' | 'right'
}
export type TableRowItem = Record<string, any>
const props = defineProps({
  // 绑定值
  modelValue: {
    type: String,
    default: ''
  },
  // 占位符
  placeholder: {
    type: String,
    default: ''
  },
  // 绑定值字段  
  labelField: {
    type: String,
    default: 'billNo'
  },
  // 输入框宽度  
  inputWidth: {
    type: String,
    default: '100%'
  },
  // 下拉面板宽度 
  panelWidth: {
    type: String,
    default: '700px'
  },
  //表格高度  
  tableHeight: {
    type: String,
    default: '150px'
  },
  // 表格列 父必传，无默认值
  columnList: {
    type: Array as () => TableColumnItem[],
    required: true
  },
  // 表格数据 父必传
  tableData: {
    type: Array as () => TableRowItem[],
    required: true
  }
})
const emit = defineEmits<{
  'update:modelValue': [val: string]
  change: [row: TableRowItem]
  open: []
  search: [val: string]
}>()
const bindField = props.labelField ?? 'billNo'
const dropdownRef = useTemplateRef('dropdownRef')
const showPanel = ref(false)
const inputText = ref('')
const tableLoading = ref(false)
watch(
  () => props.modelValue,
  (val) => {
    inputText.value = val ?? ''
  },
  { immediate: true }
)
watch(inputText, (val) => {
  emit('update:modelValue', val)
})

// 回车处理
const handleInputEnter = (e: KeyboardEvent) => {
  e.stopPropagation();
  emit('search', inputText.value)
}

// 仅点击箭头才切换下拉
const toggleDropdown = () => {
  if (!dropdownRef.value) return
  showPanel.value = !showPanel.value
  if (showPanel.value) {
    dropdownRef.value.handleOpen()
    tableLoading.value = true
    emit('open')
    setTimeout(() => {
      tableLoading.value = false
    }, 300)
  } else {
    dropdownRef.value.handleClose()
  }
}

// 行点击选中
const handleRowClick = (row: TableRowItem) => {
  const text = row[bindField] ?? ''
  inputText.value = text
  emit('update:modelValue', text)
  emit('change', row)
  dropdownRef.value?.handleClose()
  showPanel.value = false
}
</script>
<style scoped lang="scss">
.dropdown-table-select {
  .input-wrap {
    position: relative;
  }

  .arrow-icon {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    color: #909399;
    z-index: 999 !important;
    pointer-events: auto !important;
    font-size: 16px;
    transition: transform 0.2s;
  }

  .table-panel {
    padding: 12px;
  }
}
</style>