<template>
  <div class="panel-tab__content">
    <el-form label-width="70px" @submit.native.prevent>
      <el-form-item label="参数说明">
        <el-button type="primary" @click="dialogVisible = true">查看</el-button>
      </el-form-item>
      <el-form-item label="回路特性">
        <el-select v-model="loopCharacteristics" @change="changeLoopCharacteristicsType">
          <!--bpmn:MultiInstanceLoopCharacteristics-->
          <el-option label="并行多重事件" value="ParallelMultiInstance" />
          <el-option label="时序多重事件" value="SequentialMultiInstance" />
          <!--bpmn:StandardLoopCharacteristics-->
          <el-option label="循环事件" value="StandardLoop" />
          <el-option label="无" value="Null" />
        </el-select>
      </el-form-item>
      <template v-if="loopCharacteristics === 'ParallelMultiInstance' || loopCharacteristics === 'SequentialMultiInstance'">
        <el-form-item label="循环基数" key="loopCardinality">
          <el-input v-model="loopInstanceForm.loopCardinality" clearable @change="updateLoopCardinality" />
        </el-form-item>
        <el-form-item label="集合" key="collection">
          <el-input v-model="loopInstanceForm.collection" clearable @change="updateLoopBase" />
        </el-form-item>
        <el-form-item label="元素变量" key="elementVariable">
          <el-input v-model="loopInstanceForm.elementVariable" clearable @change="updateLoopBase" />
        </el-form-item>
        <el-form-item label="完成条件" key="completionCondition">
          <el-input v-model="loopInstanceForm.completionCondition" clearable @change="updateLoopCondition" />
        </el-form-item>
        <el-form-item label="异步状态" key="async">
          <el-checkbox v-model="loopInstanceForm.asyncBefore" label="异步前" @change="updateLoopAsync('asyncBefore')" />
          <el-checkbox v-model="loopInstanceForm.asyncAfter" label="异步后" @change="updateLoopAsync('asyncAfter')" />
          <el-checkbox
              v-model="loopInstanceForm.exclusive"
              v-if="loopInstanceForm.asyncAfter || loopInstanceForm.asyncBefore"
              label="排除"
              @change="updateLoopAsync('exclusive')"
          />
        </el-form-item>
        <el-form-item label="重试周期" prop="timeCycle" v-if="loopInstanceForm.asyncAfter || loopInstanceForm.asyncBefore" key="timeCycle">
          <el-input v-model="loopInstanceForm.timeCycle" clearable @change="updateLoopTimeCycle" />
        </el-form-item>
      </template>
    </el-form>
  </div>

  <!-- 参数说明 -->
  <el-dialog  title="多实例参数" v-model="dialogVisible" width="680px" @closed="$emit('close')" :draggable="true">
    <el-descriptions :column="1" border>
      <el-descriptions-item label="使用说明">按照BPMN2.0规范的要求，用于为每个实例创建执行的父执行，会提供下列变量:</el-descriptions-item>
      <el-descriptions-item label="collection(集合变量)">传入List参数, 一般为用户ID集合</el-descriptions-item>
      <el-descriptions-item label="elementVariable(元素变量)">List中单个参数的名称</el-descriptions-item>
      <el-descriptions-item label="loopCardinality(基数)">List循环次数</el-descriptions-item>
      <el-descriptions-item label="isSequential(串并行)">Parallel: 并行多实例，Sequential: 串行多实例</el-descriptions-item>
      <el-descriptions-item label="completionCondition(完成条件)">任务出口条件</el-descriptions-item>
      <el-descriptions-item label="nrOfInstances(实例总数)">实例总数</el-descriptions-item>
      <el-descriptions-item label="nrOfActiveInstances(未完成数)">当前活动的（即未完成的），实例数量。对于顺序多实例，这个值总为1</el-descriptions-item>
      <el-descriptions-item label="nrOfCompletedInstances(已完成数)">已完成的实例数量</el-descriptions-item>
      <el-descriptions-item label="loopCounter">给定实例在for-each循环中的index</el-descriptions-item>
    </el-descriptions>
  </el-dialog>
</template>
<script setup name="MultiInstance">
import {StrUtil} from '@/utils/StrUtil'
import useModelerStore from '@/store/modules/modeler'
const modelerStore = useModelerStore()
const { proxy } = getCurrentInstance();

const dialogVisible = ref(false);
const loopCharacteristics = ref("");
const loopInstanceForm = ref({});
const multiLoopInstance = ref({});

/** 组件传值  */
const props = defineProps({
  id: {
    type: String,
    required: true
  },
});

const data = reactive({
  defaultLoopInstanceForm: {
    completionCondition: "",
    loopCardinality: "",
    extensionElements: [],
    asyncAfter: false,
    asyncBefore: false,
    exclusive: false
  },
});

const { defaultLoopInstanceForm } = toRefs(data);

/** 传值监听 */
watch(() => props.id, newVal => {
      if (newVal) {
        getElementLoop(modelerStore.getBpmnElement.businessObject);
      }
    },
    {immediate: true}
)

// 方法区
function getElementLoop(businessObject) {
  if (!businessObject.loopCharacteristics) {
    loopCharacteristics.value = "Null";
    loopInstanceForm.value = {};
    return;
  }
  if (businessObject.loopCharacteristics.$type === "bpmn:StandardLoopCharacteristics") {
    loopCharacteristics.value = "StandardLoop";
    loopInstanceForm.value = {};
    return;
  }
  if (businessObject.loopCharacteristics.isSequential) {
    loopCharacteristics.value = "SequentialMultiInstance";
  } else {
    loopCharacteristics.value = "ParallelMultiInstance";
  }
  // 合并配置
  loopInstanceForm.value = {
    ...defaultLoopInstanceForm.value,
    ...businessObject.loopCharacteristics,
    completionCondition: businessObject.loopCharacteristics?.completionCondition?.body ?? "",
    loopCardinality: businessObject.loopCharacteristics?.loopCardinality?.body ?? ""
  };
  // 保留当前元素 businessObject 上的 loopCharacteristics 实例
  multiLoopInstance.value = modelerStore.getBpmnElement.businessObject.loopCharacteristics;
  // 更新表单
  if (
      businessObject.loopCharacteristics.extensionElements &&
      businessObject.loopCharacteristics.extensionElements.values &&
      businessObject.loopCharacteristics.extensionElements.values.length
  ) {
    Reflect.set(loopInstanceForm.value, "timeCycle", businessObject.loopCharacteristics.extensionElements.values[0].body);
  }
}

function changeLoopCharacteristicsType(type) {
  // 切换类型取消原表单配置
   loopInstanceForm.value = { ...defaultLoopInstanceForm.value };
  // 取消多实例配置
  if (type === "Null") {
    modelerStore.getModeling.updateProperties(modelerStore.getBpmnElement, {loopCharacteristics: null});
    return;
  }
  // 配置循环
  if (type === "StandardLoop") {
    const loopCharacteristicsObject = modelerStore.getModdle.create("bpmn:StandardLoopCharacteristics");
    modelerStore.getModeling.updateProperties(modelerStore.getBpmnElement, {
      loopCharacteristics: loopCharacteristicsObject
    });
    multiLoopInstance.value = null;
    return;
  }
  // 时序
  if (type === "SequentialMultiInstance") {
    multiLoopInstance.value = modelerStore.getModdle.create("bpmn:MultiInstanceLoopCharacteristics", {
      isSequential: true
    });
  } else {
    multiLoopInstance.value = modelerStore.getModdle.create("bpmn:MultiInstanceLoopCharacteristics");
  }
  modelerStore.getModeling.updateProperties(modelerStore.getBpmnElement, {
    loopCharacteristics: multiLoopInstance.value
  });
}

// 循环基数
function updateLoopCardinality(cardinality) {
  let loopCardinality = null;
  if (cardinality && cardinality.length) {
    loopCardinality = modelerStore.getModdle.create("bpmn:FormalExpression", {body: cardinality});
  }
  modelerStore.getModeling.updateModdleProperties(modelerStore.getBpmnElement, multiLoopInstance.value, {
    loopCardinality
  });
}

// 完成条件
function updateLoopCondition(condition) {
  let completionCondition = null;
  if (condition && condition.length) {
    completionCondition = modelerStore.getModdle.create("bpmn:FormalExpression", {body: condition});
  }
    modelerStore.getModeling.updateModdleProperties(modelerStore.getBpmnElement, multiLoopInstance.value, {
    completionCondition
  });
}

// 重试周期
function updateLoopTimeCycle(timeCycle) {
  const extensionElements = modelerStore.getModdle.create("bpmn:ExtensionElements", {
    values: [
      modelerStore.getModdle.create(`flowable:FailedJobRetryTimeCycle`, {
        body: timeCycle
      })
    ]
  });
  modelerStore.getModeling.updateModdleProperties(modelerStore.getBpmnElement, multiLoopInstance.value, {
    extensionElements
  });
}

// 直接更新的基础信息
function updateLoopBase() {
  modelerStore.getModeling.updateModdleProperties(modelerStore.getBpmnElement, multiLoopInstance.value, {
    collection: loopInstanceForm.value.collection || null,
    elementVariable: loopInstanceForm.value.elementVariable || null
  });
}

// 各异步状态
function updateLoopAsync(key) {
  const {asyncBefore, asyncAfter} = loopInstanceForm.value;
  let asyncAttr = Object.create(null);
  if (!asyncBefore && !asyncAfter) {
    Reflect.set(loopInstanceForm.value, "exclusive", false);
    asyncAttr = {asyncBefore: false, asyncAfter: false, exclusive: false, extensionElements: null};
  } else {
    asyncAttr[key] = loopInstanceForm.value[key];
  }
  modelerStore.getModeling.updateModdleProperties(modelerStore.getBpmnElement, multiLoopInstance.value, asyncAttr);
}

</script>
<style lang="scss">
@import '../style/process-panel';
</style>

