<template>
  <el-dialog v-model='dialogVisible' title='回退任务' width='500'>
    <el-form
        ref='formRef'
        v-loading='formLoading'
        :model='formData'
        :rules='formRules'
        label-width='110px'
    >
      <el-form-item label='退回节点' prop='targetTaskDefinitionKey'>
        <el-select v-model='formData.targetTaskDefinitionKey' clearable style='width: 100%' filterable>
          <el-option
              v-for='item in returnList'
              :key='item.taskDefinitionKey'
              :label='item.name'
              :value='item.taskDefinitionKey'
          />
        </el-select>
      </el-form-item>
      <el-form-item label='回退理由' prop='reason'>
        <el-input v-model='formData.reason' clearable placeholder='请输入回退理由' />
      </el-form-item>
    </el-form>
    <template #footer>
      <el-button :disabled='formLoading' type='primary' @click='submitForm'>确 定</el-button>
      <el-button @click='dialogVisible = false'>取 消</el-button>
    </template>
  </el-dialog>
</template>
<script lang='ts' name='TaskRollbackDialogForm' setup>
import { onMounted, provide, ref, getCurrentInstance, reactive, watch, unref, nextTick } from 'vue'
import { ElMessage } from 'element-plus'
import { getTaskListByReturn, returnTask } from '@/api/bpm-boot/task'

const dialogVisible = ref(false) // 弹窗的是否展示
const formLoading = ref(false) // 表单的加载中
const formData = ref({
  id: '',
  targetTaskDefinitionKey: undefined,
  reason: ''
})
const formRules = ref({
  targetTaskDefinitionKey: [{ required: true, message: '必须选择回退节点', trigger: 'change' }],
  reason: [{ required: true, message: '回退理由不能为空', trigger: 'blur' }]
})

const formRef = ref() // 表单 Ref
const returnList = ref([] as any)
/** 打开弹窗 */
const open = async (id: string) => {
  await getTaskListByReturn(id).then(res => {
    returnList.value = res.data
  })
  if (returnList.value.length === 0) {
    ElMessage.warning('当前没有可回退的节点')
    return false
  }
  dialogVisible.value = true
  resetForm()
  formData.value.id = id
}
defineExpose({ open }) // 提供 openModal 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 {
    await returnTask(formData.value)
    ElMessage.success('回退成功')
    dialogVisible.value = false
    // 发送操作成功的事件
    emit('success')
  } finally {
    formLoading.value = false
  }
}

/** 重置表单 */
const resetForm = () => {
  formData.value = {
    id: '',
    targetTaskDefinitionKey: undefined,
    reason: ''
  }
  formRef.value?.resetFields()
}
</script>
