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contributor license agreements.  See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
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(the "License"); you may not use this file except in compliance with
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  http://www.apache.org/licenses/LICENSE-2.0

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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 id="graph-stack" ref="graph">
    <span class="tip" v-show="(ebpfStore as any).ebpfTips">{{ (ebpfStore as any).ebpfTips }}</span>
  </div>
</template>
<script lang="ts" setup>
  import { ref, watch } from "vue";
  import * as d3 from "d3";
  import d3tip from "d3-tip";
  import { flamegraph } from "d3-flame-graph";
  import { useEbpfStore } from "@/store/modules/ebpf";
  import { useAsyncProfilingStore } from "@/store/modules/async-profiling";
  import type { StackElement } from "@/types/ebpf";
  import type { StackElement as AsyncProfilingStackElement } from "@/types/async-profiling";
  import { AggregateTypes } from "./data";
  import { JFREventType, ComponentType } from "@/views/dashboard/related/async-profiling/components/data";
  import "d3-flame-graph/dist/d3-flamegraph.css";
  import { treeForeach } from "@/utils/flameGraph";

  /*global Nullable, defineProps*/
  const props = defineProps({
    type: {
      type: String,
      default: "",
    },
  });
  const ebpfStore: ReturnType<typeof useAsyncProfilingStore | typeof useEbpfStore> =
    props.type === ComponentType ? useAsyncProfilingStore() : useEbpfStore();
  const stackTree = ref<Nullable<StackElement>>(null);
  const selectStack = ref<Nullable<StackElement>>(null);
  const graph = ref<Nullable<HTMLDivElement>>(null);
  const flameChart = ref<any>(null);
  const min = ref<number>(1);
  const max = ref<number>(1);

  function drawGraph() {
    if (flameChart.value) {
      flameChart.value.destroy();
    }
    if (!ebpfStore.analyzeTrees.length) {
      return (stackTree.value = null);
    }
    let root: StackElement = {
      parentId: "0",
      originId: "1",
      name: "Virtual Root",
      children: [],
      value: 0,
      id: "1",
      symbol: "Virtual Root",
      dumpCount: 0,
      stackType: "",
      rateOfRoot: "",
      rateOfParent: "",
    };
    countRange();
    if (props.type === ComponentType) {
      const elements = processTree(
        ((ebpfStore as ReturnType<typeof useAsyncProfilingStore>).analyzeTrees[0].elements ||
          []) as AsyncProfilingStackElement[],
      );
      stackTree.value = elements;
      root = { ...root, ...elements };
    } else {
      for (const tree of (ebpfStore as ReturnType<typeof useEbpfStore>).analyzeTrees) {
        const ele = processTree(tree.elements as StackElement[]);
        root.children && root.children.push(ele);
      }
      const param = (root.children || []).reduce(
        (prev: number[], curr: StackElement) => {
          prev[0] += curr.value;
          prev[1] += curr.dumpCount;
          return prev;
        },
        [0, 0],
      );
      root.value = param[0];
      root.dumpCount = param[1];
      stackTree.value = root;
    }

    const width = (graph.value && graph.value.getBoundingClientRect().width) || 0;
    const w = width < 800 ? 802 : width;
    flameChart.value = flamegraph()
      .width(w - 15)
      .cellHeight(18)
      .transitionDuration(750)
      .minFrameSize(1)
      .transitionEase(d3.easeCubic as any)
      .sort(true)
      .title("")
      .selfValue(false)
      .inverted(true)
      .onClick((d: { data: StackElement }) => {
        selectStack.value = d.data;
      })
      .setColorMapper((d, originalColor) => (d.highlight ? "#6aff8f" : originalColor));
    const tip = (d3tip as any)()
      .attr("class", "d3-tip")
      .direction("s")
      .html((d: { data: StackElement } & { parent: { data: StackElement } }) => {
        const name = d.data.name.replace("<", "&lt;").replace(">", "&gt;");
        const valStr = tooltipContent(d.data);
        const rateOfParent =
          (d.parent &&
            `<div class="mb-5">Percentage Of Selected: ${
              (
                (d.data.dumpCount / ((selectStack.value && selectStack.value.dumpCount) || root.dumpCount)) *
                100
              ).toFixed(3) + "%"
            }</div>`) ||
          "";
        const rateOfRoot = `<div class="mb-5">Percentage Of Root: ${
          ((d.data.dumpCount / root.dumpCount) * 100).toFixed(3) + "%"
        }</div>`;
        return `<div class="mb-5 name">Symbol: ${name}</div>${valStr}${rateOfParent}${rateOfRoot}`;
      })
      .style("max-width", "400px");
    flameChart.value.tooltip(tip);
    d3.select("#graph-stack").datum(stackTree.value).call(flameChart.value);
  }

  function tooltipContent(item: StackElement) {
    if (props.type === ComponentType) {
      if (!ebpfStore.analyzeTrees.length) {
        return;
      }
      const { type } = ebpfStore.analyzeTrees[0] as any;
      if ([JFREventType.LOCK].includes(type)) {
        return `<div class="mb-5">Duration: ${item.dumpCount} ns</div>`;
      }
      if (type === JFREventType.EXECUTION_SAMPLE) {
        return `<div class="mb-5">Count: ${item.dumpCount}</div>`;
      }
      return `<div class="mb-5">Memory: ${item.dumpCount} byte</div>`;
    }

    (ebpfStore as ReturnType<typeof useEbpfStore>).aggregateType === AggregateTypes[0].value
      ? `<div class="mb-5">Dump Count: ${item.dumpCount}</div>`
      : `<div class="mb-5">Duration: ${item.dumpCount} ns</div>`;
  }

  function countRange() {
    const list = [];
    for (const tree of (ebpfStore as ReturnType<typeof useEbpfStore>).analyzeTrees) {
      for (const ele of tree.elements || []) {
        list.push(ele.dumpCount);
      }
    }
    max.value = Math.max(...list);
    min.value = Math.min(...list);
  }

  function processTree(arr: StackElement[] | AsyncProfilingStackElement[]) {
    const copyArr = JSON.parse(JSON.stringify(arr));
    const obj: any = {};
    let res = null;
    for (const item of copyArr) {
      item.parentId = String(Number(item.parentId) + 1);
      item.originId = String(Number(item.id) + 1);
      item.name = item.symbol;
      delete item.id;
      obj[item.originId] = item;
    }
    const scale = d3.scaleLinear().domain([min.value, max.value]).range([1, 200]);
    const condition = props.type === ComponentType ? "0" : "1";
    for (const item of copyArr) {
      if (item.parentId === condition) {
        const val = Number(scale(item.dumpCount).toFixed(4));
        res = item;
        res.value = val;
      }
      for (const key in obj) {
        if (item.originId === obj[key].parentId) {
          const val = Number(scale(obj[key].dumpCount).toFixed(4));

          obj[key].value = val;
          if (item.children) {
            item.children.push(obj[key]);
          } else {
            item.children = [obj[key]];
          }
        }
      }
    }
    treeForeach([res], (node: StackElement) => {
      if (node.children) {
        let val = 0;
        for (const child of node.children) {
          val = child.value + val;
        }
        node.value = node.value < val ? val : node.value;
      }
    });

    return res;
  }

  watch(
    () => ebpfStore.analyzeTrees,
    () => {
      drawGraph();
    },
  );
</script>
<style>
  #graph-stack {
    width: 100%;
    height: 100%;
    cursor: pointer;
  }

  .tip {
    display: inline-block;
    width: 100%;
    text-align: center;
    color: red;
    margin-top: 20px;
  }

  .name {
    word-wrap: break-word;
  }
</style>
