<template>
  <div class="my-process-designer">
    <div class="my-process-designer__container">
      <div class="my-process-designer__canvas" ref="canvas"></div>
    </div>
  </div>
</template>

<script>
import BpmnViewer from "bpmn-js/lib/Viewer";
import DefaultEmptyXML from "./plugins/defaultEmpty";

export default {
  name: "MyProcessViewer",
  componentName: "MyProcessViewer",
  props: {
    value: String, // xml 字符串
    prefix: {
      type: String,
      default: "camunda"
    },
    taskData: {
      type: Array,
      default: () => []
    }
  },
  data() {
    return {
      xml: '',
      tasks: [],
    };
  },
  mounted() {
    this.xml = this.value;
    this.tasks = this.taskData;
    // 初始化
    this.initBpmnModeler();
    this.createNewDiagram(this.xml);
    this.$once("hook:beforeDestroy", () => {
      if (this.bpmnModeler) this.bpmnModeler.destroy();
      this.$emit("destroy", this.bpmnModeler);
      this.bpmnModeler = null;
    });
  },
  watch: {
    value: function (newValue) { // 在 xmlString 发生变化时，重新创建，从而绘制流程图
      this.xml = newValue;
      this.createNewDiagram(this.xml);
    },
    taskData: function (newTaskData) {
      this.tasks = newTaskData;
      this.createNewDiagram(this.xml);
    }
  },
  methods: {
    initBpmnModeler() {
      if (this.bpmnModeler) return;
      this.bpmnModeler = new BpmnViewer({
        container: this.$refs["canvas"],
        bpmnRenderer: {
        }
      })
    },
    /* 创建新的流程图 */
    async createNewDiagram(xml) {
      // 将字符串转换成图显示出来
      let newId = `Process_${new Date().getTime()}`;
      let newName = `业务流程_${new Date().getTime()}`;
      let xmlString = xml || DefaultEmptyXML(newId, newName, this.prefix);
      try {
        // console.log(this.bpmnModeler.importXML);
        let { warnings } = await this.bpmnModeler.importXML(xmlString);
        if (warnings && warnings.length) {
          warnings.forEach(warn => console.warn(warn));
        }
        // 高亮流程图
        await this.highlightDiagram();
      } catch (e) {
        console.error(e);
        // console.error(`[Process Designer Warn]: ${e?.message || e}`);
      }
    },
    /* 高亮流程图 */
    async highlightDiagram() {
      if (this.tasks.length === 0) {
        return;
      }
      if (!this.bpmnModeler.getDefinitions().rootElements[0].flowElements) {
        return;
      }
      let canvas = this.bpmnModeler.get('canvas');
      this.bpmnModeler.getDefinitions().rootElements[0].flowElements.forEach(n => {
        if (n.$type === 'bpmn:UserTask') {
          let completeTask = this.tasks.find(m => m.definitionKey === n.id)
          let todoTask = this.tasks.find(m => !m.endTime)
          let endTask = this.tasks[this.tasks.length - 1]
          if (completeTask) {
            canvas.addMarker(n.id, completeTask.endTime ? 'highlight' : 'highlight-todo');
            console.log(n.id + ' : ' + (completeTask.endTime ? 'highlight' : 'highlight-todo'));
            // n.outgoing.forEach(nn => {
            //   let targetTask = this.tasks.find(m => m.definitionKey === nn.targetRef.id)
            //   if (targetTask) {
            //     canvas.addMarker(nn.id, targetTask.endTime ? 'highlight' : 'highlight-todo');
            //   } else if (nn.targetRef.$type === 'bpmn:ExclusiveGateway') {
            //     // canvas.addMarker(nn.id, 'highlight');
            //     canvas.addMarker(nn.id, completeTask.endTime ? 'highlight' : 'highlight-todo');
            //     canvas.addMarker(nn.targetRef.id, completeTask.endTime ? 'highlight' : 'highlight-todo');
            //   } else if (nn.targetRef.$type === 'bpmn:EndEvent') {
            //     if (!todoTask && endTask.definitionKey === n.id) {
            //       canvas.addMarker(nn.id, 'highlight');
            //       canvas.addMarker(nn.targetRef.id, 'highlight');
            //     }
            //     if (!completeTask.endTime) {
            //       canvas.addMarker(nn.id, 'highlight-todo');
            //       canvas.addMarker(nn.targetRef.id, 'highlight-todo');
            //     }
            //   }
            // });
          }
        } else if (n.$type === 'bpmn:ExclusiveGateway') {
          // n.outgoing.forEach(nn => {
          //   let targetTask = this.tasks.find(m => m.definitionKey === nn.targetRef.id)
          //   if (targetTask) {
          //     canvas.addMarker(nn.id, targetTask.endTime ? 'highlight' : 'highlight-todo');
          //   }
          // })
        }
        if (n.$type === 'bpmn:StartEvent') {
          canvas.addMarker(n.id, 'highlight-todo');

          // n.outgoing.forEach(nn => {
          //   let completeTask = this.tasks.find(m => m.definitionKey === nn.targetRef.id)
          //   if (completeTask) {
          //     canvas.addMarker(nn.id, 'highlight');
          //     canvas.addMarker(n.id, 'highlight');
          //     return
          //   }
          // });
        }
      })
    }
  }
};
</script>

<style>
.containers {
  position: absolute;
  background-color: #ffffff;
  top:0;
  left: 0;
  width: 100%;
  height: 100%;
}
.canvas {
  width: 100%;
  height: 100%;
}

/*/deep/.highlight-todo {*/
/*  background-color: red;*/
/*  fill: green !important;*/
/*  stroke: green !important;*/
/*}*/

/deep/.highlight.djs-shape .djs-visual > :nth-child(1) {
  fill: green !important;
  stroke: green !important;
  fill-opacity: 0.2 !important;
}
/deep/.highlight.djs-shape .djs-visual > :nth-child(2) {
  fill: green !important;
}
/deep/.highlight.djs-shape .djs-visual > path {
  fill: green !important;
  fill-opacity: 0.2 !important;
  stroke: green !important;
}
/deep/.highlight.djs-connection > .djs-visual > path {
  stroke: green !important;
}
/deep/.highlight-todo.djs-connection > .djs-visual > path {
  stroke: orange !important;
  stroke-dasharray: 4px !important;
  fill-opacity: 0.2 !important;
  marker-end: url(#sequenceflow-end-_E7DFDF-_E7DFDF-803g1kf6zwzmcig1y2ulm5egr);
}
/deep/.highlight-todo.djs-shape .djs-visual > :nth-child(1) {
  fill: orange !important;
  stroke: orange !important;
  stroke-dasharray: 4px !important;
  fill-opacity: 0.2 !important;
}
/deep/.overlays-div {
  font-size: 10px;
  color: red;
  width: 100px;
  top: -20px !important;
}
</style>
