<!-- Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements.  See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License.  You may obtain a copy of the License at

  http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License. -->
<template>
  <div class="trace-tree-charts scroll_hide flex-v">
    <transition-group name="fade" tag="div" style="padding: 10px 30px;">
      <span class="time-charts-item mr-10" v-for="(i, index) in list" :key="i" :style="`color:${computedScale(index)}`">
        <svg class="icon vm mr-5 sm">
          <use xlink:href="#issue-open-m"></use>
        </svg>
        <span>{{ i }}</span>
      </span>
    </transition-group>
    <div style="padding: 0 30px;">
      <a class="trace-tree-btn mr-10" @click="tree.setDefault()">Default</a>
      <a class="trace-tree-btn mr-10" @click="tree.getTopSlow()">Top 5 of slow</a>
      <a class="trace-tree-btn mr-10" @click="tree.getTopChild()">Top 5 of children</a>
    </div>
    <rk-sidebox :width="'50%'" :show.sync="showDetail" :title="$t('spanInfo')">
      <TraceSpanLogs :currentSpan="currentSpan" />
    </rk-sidebox>
    <div class="trace-tree" style="height:100%">
      <div class="trace-tree-inner" ref="traceTree"></div>
    </div>
  </div>
</template>
<script lang="js">
  import copy from '@/utils/copy';
  import * as d3 from 'd3';
  import Tree from './d3-trace-tree';
  import _ from 'lodash';
  import TraceSpanLogs from './trace-span-logs.vue';
  /* eslint-disable */
  /* tslint:disable */
  export default {
    components: {TraceSpanLogs},
    props: ['data', 'traceId'],
    data(){
      return {
        segmentId:[],
        showDetail: false,
        list: [],
        currentSpan: [],
      };
    },
    watch: {
      data() {
        if(!this.data.length) {return;}
        d3.select('.trace-tree-inner').selectAll('svg').selectAll('svg').remove();
        this.changeTree();
        this.tree.init({label:`${this.traceId}`, children: this.segmentId}, this.data);
      }
    },
    mounted() {
      window.addEventListener('resize', this.resize);
      this.changeTree();
      this.tree = new Tree(this.$refs.traceTree, this);
      this.tree.init({label:`${this.traceId}`, children: this.segmentId}, this.data);
    },
    beforeDestroy() {
        window.removeEventListener('resize', this.resize);
    },
    methods: {
      copy,
      handleSelectSpan(i) {
        this.currentSpan = i.data;
        this.showDetail = true;
      },
      traverseTree(node, spanId, segmentId, data){
        if (!node || node.isBroken) return;
        if(node.spanId == spanId && node.segmentId == segmentId) {node.children.push(data);return;}
        if (node.children && node.children.length > 0) {
          for (let i = 0; i < node.children.length; i++) {
              this.traverseTree(node.children[i],spanId,segmentId,data);
          }
        }
      },
      computedScale(i) {
         // Rainbow map
        const sequentialScale = d3.scaleSequential()
        .domain([0, this.list.length + 1])
        .interpolator(d3.interpolateCool);
        return sequentialScale(i);
      },
      changeTree(){
        if (this.data.length === 0) return [];
        this.list = Array.from(new Set(this.data.map(i => i.serviceCode)));
        this.segmentId = [];
        const segmentGroup = {}
        const segmentIdGroup = []
        const fixSpans = [];
        const segmentHeaders = [];
          this.data.forEach((span) => {
            if (span.parentSpanId === -1) {
              segmentHeaders.push(span);
            } else {
              const index = this.data.findIndex(i => (i.segmentId === span.segmentId && i.spanId === (span.spanId - 1)));
              const fixSpanKeyContent = {
                traceId: span.traceId,
                segmentId: span.segmentId,
                spanId: span.spanId - 1,
                parentSpanId: span.spanId - 2,
              };
              if (index === -1 && !_.find(fixSpans, fixSpanKeyContent)) {
                fixSpans.push(
                  {
                    ...fixSpanKeyContent, refs: [], endpointName: `VNode: ${span.segmentId}`, serviceCode: 'VirtualNode', type: `[Broken] ${span.type}`, peer: '', component: `VirtualNode: #${span.spanId - 1}`, isError: true, isBroken: true, layer: 'Broken', tags: [], logs: [],
                  },
                );
              }
            }
          });
          segmentHeaders.forEach((span) => {
            if (span.refs.length) {
              span.refs.forEach((ref) => {
                const index = this.data.findIndex(i => (ref.parentSegmentId === i.segmentId && ref.parentSpanId === i.spanId));
                if (index === -1) {
                  // create a known broken node.
                  const i = ref.parentSpanId;
                  const fixSpanKeyContent = {
                    traceId: ref.traceId,
                    segmentId: ref.parentSegmentId,
                    spanId: i,
                    parentSpanId: i > -1 ? 0 : -1,
                  };
                  !_.find(fixSpans, fixSpanKeyContent) && fixSpans.push(
                    {
                      ...fixSpanKeyContent, refs: [], endpointName: `VNode: ${ref.parentSegmentId}`, serviceCode: 'VirtualNode', type: `[Broken] ${ref.type}`, peer: '', component: `VirtualNode: #${i}`, isError: true, isBroken: true, layer: 'Broken', tags: [], logs: [],
                    },
                  );
                  // if root broken node is not exist, create a root broken node.
                  if (fixSpanKeyContent.parentSpanId > -1) {
                    const fixRootSpanKeyContent = {
                      traceId: ref.traceId,
                      segmentId: ref.parentSegmentId,
                      spanId: 0,
                      parentSpanId: -1,
                    };
                    !_.find(fixSpans, fixRootSpanKeyContent) && fixSpans.push(
                      {
                        ...fixRootSpanKeyContent,
                        refs: [],
                        endpointName: `VNode: ${ref.parentSegmentId}`,
                        serviceCode: 'VirtualNode',
                        type: `[Broken] ${ref.type}`,
                        peer: '',
                        component: `VirtualNode: #0`,
                        isError: true,
                        isBroken: true,
                        layer: 'Broken',
                        tags: [],
                        logs: [],
                      },
                    );
                  }
                }
              });
            }
          });
          [...fixSpans, ...this.data].forEach(i => {
            i.label=i.endpointName || 'no operation name';
            i.children = [];
            if(segmentGroup[i.segmentId] === undefined){
              segmentIdGroup.push(i.segmentId);
              segmentGroup[i.segmentId] = [];
              segmentGroup[i.segmentId].push(i);
            }else{
              segmentGroup[i.segmentId].push(i);
            }
          });
          segmentIdGroup.forEach(id => {
            let currentSegment = segmentGroup[id].sort((a,b) => b.parentSpanId-a.parentSpanId);
            currentSegment.forEach(s =>{
              let index = currentSegment.findIndex(i => i.spanId === s.parentSpanId);
              if (index !== -1) {
                if ((currentSegment[index].isBroken && currentSegment[index].parentSpanId === -1) || !currentSegment[index].isBroken) {
                  currentSegment[index].children.push(s);
                  currentSegment[index].children.sort((a, b) => a.spanId - b.spanId);
                }
              }
              if (s.isBroken) {
                const children = _.filter(this.data, (span) => {
                  return _.find(span.refs, {traceId: s.traceId, parentSegmentId: s.segmentId, parentSpanId: s.spanId});
                });
                children.length > 0 && s.children.push(...children);
              }
            })
            segmentGroup[id] = currentSegment[currentSegment.length-1]
          })
          segmentIdGroup.forEach(id => {
            segmentGroup[id].refs.forEach(ref => {
              if(ref.traceId === this.traceId) {
                this.traverseTree(segmentGroup[ref.parentSegmentId],ref.parentSpanId,ref.parentSegmentId,segmentGroup[id])
              };
            })
            // if(segmentGroup[id].refs.length !==0 ) delete segmentGroup[id];
          })
        for (let i in segmentGroup) {
          if(segmentGroup[i].refs.length ===0 )
          this.segmentId.push(segmentGroup[i]);
        }
        this.segmentId.forEach((_, i) => {
          this.collapse(this.segmentId[i]);
        })
      },
      collapse(d) {
        if(d.children){
          let dur = d.endTime - d.startTime;
          d.children.forEach(i => {
            dur -= (i.endTime - i.startTime);
          })
          d.dur = dur < 0 ? 0 : dur;
          d.children.forEach((i) => this.collapse(i));
        }
      },
      resize() {
          this.tree.resize();
      },
      showCurrentSpanDetail(title, text) {
        const textLineNumber = text.split('\n').length;
        let textHeight = textLineNumber * 20.2 + 10;
        const tmpHeight = window.innerHeight * 0.9
        textHeight = textHeight >= tmpHeight ? tmpHeight : textHeight;
        this.$modal.show('dialog', {
          title,
          text: `<div style="height:${textHeight}px">${text}</div>`,
          buttons: [
            {
              title: 'Copy',
              handler: () => {
                this.copy(text);
              },
            },
            {
              title: 'Close',
            },
          ],
        })
      },
    }
  };
</script>
<style lang="scss">
  .trace-tree-btn {
    display: inline-block;
    border-radius: 4px;
    padding: 0px 7px;
    background-color: #40454e;
    color: #eee;
    font-size: 11px;
  }
  .trace-tree-charts {
    overflow: auto;
    flex-grow: 1;
    height: 100%;
  }
  .trace-node .group {
    cursor: pointer;
    fill-opacity: 0;
  }
  .trace-tree-inner {
    height: 100%;
  }
  .trace-node-container {
    fill: rgba(0, 0, 0, 0);
    stroke-width: 5px;
    cursor: pointer;
    &:hover {
      fill: rgba(0, 0, 0, 0.05);
    }
  }
  .trace-node .node-text {
    font: 12.5px sans-serif;
    pointer-events: none;
  }
  .domain {
    display: none;
  }
  .tree-link {
    fill: none;
    stroke: rgba(0, 0, 0, 0.1);
    stroke-width: 2px;
  }
  .time-charts-item {
    display: inline-block;
    padding: 2px 8px;
    border: 1px solid;
    font-size: 11px;
    border-radius: 4px;
  }
  .trace-tree {
    fill: rgba(0, 0, 0, 0);
    flex-grow: 1;
  }
  .trace-tree .trace-node rect {
    &:hover {
      fill: rgba(0, 0, 0, 0.05);
    }
  }
  .dialog-c-text {
    white-space: pre;
    overflow: auto;
    font-family: monospace;
  }
</style>