<template>
  <div style="margin-top: 16px">
    <el-form-item label="脚本格式">
      <el-input v-model="scriptTaskForm.scriptFormat" clearable @input="updateElementTask()" @change="updateElementTask()" />
    </el-form-item>
    <el-form-item label="脚本类型">
      <el-select v-model="scriptTaskForm.scriptType">
        <el-option label="内联脚本" value="inline" />
        <el-option label="外部资源" value="external" />
      </el-select>
    </el-form-item>
    <el-form-item label="脚本" v-show="scriptTaskForm.scriptType === 'inline'">
      <el-input
        v-model="scriptTaskForm.script"
        type="textarea"
        resize="vertical"
        :autosize="{ minRows: 2, maxRows: 4 }"
        clearable
        @input="updateElementTask()"
        @change="updateElementTask()"
      />
    </el-form-item>
    <el-form-item label="资源地址" v-show="scriptTaskForm.scriptType === 'external'">
      <el-input v-model="scriptTaskForm.resource" clearable @input="updateElementTask()" @change="updateElementTask()" />
    </el-form-item>
    <el-form-item label="结果变量">
      <el-input v-model="scriptTaskForm.resultVariable" clearable @input="updateElementTask()" @change="updateElementTask()" />
    </el-form-item>
  </div>
</template>

<script>
export default {
  name: "ScriptTask",
  props: {
    id: String,
    type: String
  },
  data() {
    return {
      defaultTaskForm: {
        scriptFormat: "",
        script: "",
        resource: "",
        resultVariable: ""
      },
      scriptTaskForm: {}
    };
  },
  watch: {
    id: {
      immediate: true,
      handler() {
        this.bpmnElement = window.bpmnInstances.bpmnElement;
        this.$nextTick(() => this.resetTaskForm());
      }
    }
  },
  methods: {
    resetTaskForm() {
      for (let key in this.defaultTaskForm) {
        let value = this.bpmnElement?.businessObject[key] || this.defaultTaskForm[key];
        this.scriptTaskForm[key] = value
      }
      this.scriptTaskForm["scriptType"] = this.scriptTaskForm.script ? "inline" : "external"
    },
    updateElementTask() {
      let taskAttr = Object.create(null);
      taskAttr.scriptFormat = this.scriptTaskForm.scriptFormat || null;
      taskAttr.resultVariable = this.scriptTaskForm.resultVariable || null;
      if (this.scriptTaskForm.scriptType === "inline") {
        taskAttr.script = this.scriptTaskForm.script || null;
        taskAttr.resource = null;
      } else {
        taskAttr.resource = this.scriptTaskForm.resource || null;
        taskAttr.script = null;
      }
      window.bpmnInstances.modeling.updateProperties(this.bpmnElement, taskAttr);
    }
  },
  beforeUnmount() {
    this.bpmnElement = null;
  }
};
</script>
