<template>
  <Dialog v-model="dialogVisible" :title="dialogTitle">
    <el-form
      ref="formRef"
      v-loading="formLoading"
      :model="formData"
      :rules="formRules"
      label-width="100px"
    >
      <el-form-item label="上级物料组" prop="parentId">
        <el-tree-select
          ref="treeSelectRef"
          filterable
          v-model="formData.parentId"
          :data="materialGroupTree"
          :props="defaultProps"
          :default-expanded-keys="firstLevelKeys"
          check-strictly
          clearable
          placeholder="请选择上级物料组"
          value-key="id"
          @filter="handleFilter"
        />
      </el-form-item>
      <el-form-item label="物料组名称" prop="name">
        <el-input v-model="formData.name" placeholder="请输入物料组名称" />
      </el-form-item>
      <el-form-item label="显示排序" prop="sort">
        <el-input-number v-model="formData.sort" :min="0" controls-position="right" />
      </el-form-item>
      <el-form-item label="状态" prop="status">
        <el-select v-model="formData.status" clearable placeholder="请选择状态">
          <el-option
            v-for="dict in getIntDictOptions(DICT_TYPE.COMMON_STATUS)"
            :key="dict.value"
            :label="dict.label"
            :value="dict.value"
          />
        </el-select>
      </el-form-item>
    </el-form>
    <template #footer>
      <el-button type="primary" @click="submitForm">确 定</el-button>
      <el-button @click="dialogVisible = false">取 消</el-button>
    </template>
  </Dialog>
</template>
<script lang="ts" setup>
import { DICT_TYPE, getIntDictOptions } from '@/utils/dict'
import { defaultProps, handleTree } from '@/utils/tree'
import * as MaterialGroupApi from '@/api/pms/materialgroup'
import { CommonStatusEnum } from '@/utils/constants'
import { FormRules } from 'element-plus'

defineOptions({ name: 'MaterialGroupForm' })

const { t } = useI18n() // 国际化
const message = useMessage() // 消息弹窗

const dialogVisible = ref(false) // 弹窗的是否展示
const dialogTitle = ref('') // 弹窗的标题
const formLoading = ref(false) // 表单的加载中：1）修改时的数据加载；2）提交的按钮禁用
const formType = ref('') // 表单的类型：create - 新增；update - 修改
const formData = ref({
  id: undefined,
  title: '',
  parentId: undefined,
  name: undefined,
  sort: undefined,
  status: CommonStatusEnum.ENABLE
})
const formRules = reactive<FormRules>({
  parentId: [{ required: true, message: '上级物料组不能为空', trigger: 'blur' }],
  name: [{ required: true, message: '物料组名称不能为空', trigger: 'blur' }],
  sort: [{ required: true, message: '显示排序不能为空', trigger: 'blur' }],
  status: [{ required: true, message: '状态不能为空', trigger: 'blur' }]
})
const formRef = ref() // 表单 Ref
const materialGroupTree = ref<Tree[]>([]) // 树形结构
const firstLevelKeys = ref<Tree[]>([])

const treeSelectRef = ref()

/** 打开弹窗 */
const open = async (type: string, id?: number, parentId: number) => {
  dialogVisible.value = true
  dialogTitle.value = t('action.' + type)
  formType.value = type
  resetForm()
  formData.value.parentId = parentId
  // 修改时，设置数据
  if (id) {
    formLoading.value = true
    try {
      formData.value = await MaterialGroupApi.getMaterialGroup(id)
    } finally {
      formLoading.value = false
    }
  }
  // 获得部门树
  await getTree()
}
defineExpose({ open }) // 提供 open 方法，用于打开弹窗

/** 提交表单 */
const emit = defineEmits(['success']) // 定义 success 事件，用于操作成功后的回调
const submitForm = async () => {
  // 校验表单
  if (!formRef) return
  const valid = await formRef.value.validate()
  if (!valid) return
  // 提交请求
  formLoading.value = true
  try {
    const data = formData.value as unknown as MaterialGroupApi.MaterialGroupVO
    if (formType.value === 'create') {
      await MaterialGroupApi.createMaterialGroup(data)
      message.success(t('common.createSuccess'))
    } else {
      await MaterialGroupApi.updateMaterialGroup(data)
      message.success(t('common.updateSuccess'))
    }
    dialogVisible.value = false
    // 发送操作成功的事件
    emit('success')
  } finally {
    formLoading.value = false
  }
}

const handleFilter = (val: string) => {
  // 当筛选值清空时重置展开状态
  if (val === '') {
    nextTick(() => {
      const treeComponent = treeSelectRef.value?.treeRef
      if (treeComponent) {
        // 重置到初始展开状态
        treeComponent.setExpandedKeys(firstLevelKeys.value)
        // 滚动到顶部确保可视区域正确
        treeComponent.scrollTo({ top: 0 })
      }
    })
  }
}

/** 重置表单 */
const resetForm = () => {
  formData.value = {
    id: undefined,
    title: '',
    parentId: undefined,
    name: undefined,
    sort: undefined,
    status: CommonStatusEnum.ENABLE
  }
  formRef.value?.resetFields()
}

/** 获得物料组树 */
const getTree = async () => {
  materialGroupTree.value = []
  const data = await MaterialGroupApi.getSimpleMaterialGroupList()
  // let materialGroup: Tree = { id: 0, name: '顶级物料组', children: [] }
  // materialGroup.children = handleTree(data)
  // materialGroupTree.value.push(materialGroup)
  // firstLevelKeys.value = materialGroupTree.value.map(node => node.id);

  // 构建稳定的顶级节点
  const rootNode = {
    id: 0,
    name: '物料组分类',
    children: handleTree(data)
  }
  materialGroupTree.value = [rootNode]
  firstLevelKeys.value = [rootNode.id]
}
</script>
