<!-- 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>
  <SelectorLegend
    :data="option.legend?.data"
    :show="legendSelector.isSelector"
    :isConfigPage="legendSelector.isConfigPage"
    :colors="option.color"
    @change="changeLegend"
  />
  <div class="chart" ref="chartRef" :style="`height:${height};width:${width};`">
    <div v-if="!available" class="no-data">No Data</div>
    <div
      class="menus"
      v-show="visMenus"
      :style="{
        top: menuPos.y + 'px',
        left: menuPos.x + 'px',
      }"
      @mouseenter="hideTooltips"
    >
      <div class="tools" @click="associateMetrics" v-if="associate.length">
        {{ t("associateMetrics") }}
      </div>
      <div class="tools" @click="viewTrace" v-if="relatedTrace && relatedTrace.enableRelate">
        {{ t("viewTrace") }}
      </div>
    </div>
    <el-drawer
      v-model="showTrace"
      size="100%"
      :destroy-on-close="true"
      :before-close="() => (showTrace = false)"
      :append-to-body="true"
      title="The Related Traces"
    >
      <Trace :data="traceOptions" />
    </el-drawer>
  </div>
</template>
<script lang="ts" setup>
  import { watch, ref, onMounted, onBeforeUnmount, unref, computed, reactive } from "vue";
  import type { PropType, Ref } from "vue";
  import { useI18n } from "vue-i18n";
  import type { EventParams } from "@/types/app";
  import type { Filters, RelatedTrace, AssociateProcessorProps } from "@/types/dashboard";
  import { useECharts } from "@/hooks/useEcharts";
  import { addResizeListener, removeResizeListener } from "@/utils/event";
  import Trace from "@/views/dashboard/related/trace/Index.vue";
  import useAssociateProcessor from "@/hooks/useAssociateProcessor";
  import { WidgetType } from "@/views/dashboard/data";
  import SelectorLegend from "./Legend.vue";

  /*global Nullable, defineProps, defineEmits, Indexable*/
  const emits = defineEmits(["select"]);
  const { t } = useI18n();
  const chartRef = ref<Nullable<HTMLDivElement>>(null);
  const visMenus = ref<boolean>(false);
  const { setOptions, resize, getInstance } = useECharts(chartRef as Ref<HTMLDivElement>);
  const currentParams = ref<Nullable<EventParams>>(null);
  const showTrace = ref<boolean>(false);
  const traceOptions = ref<{ type: string; filters?: unknown } | any>({
    type: WidgetType.Trace,
  });
  const menuPos = reactive<{ x: number; y: number }>({ x: NaN, y: NaN });
  const props = defineProps({
    height: { type: String, default: "100%" },
    width: { type: String, default: "100%" },
    option: {
      type: Object as PropType<Indexable>,
      default: () => ({}),
    },
    filters: {
      type: Object as PropType<Filters>,
    },
    relatedTrace: {
      type: Object as PropType<RelatedTrace>,
    },
    associate: {
      type: Array as PropType<{ widgetId: string }[]>,
      default: () => [],
    },
    legendSelector: {
      type: Object as PropType<Indexable>,
      default: () => ({ isConfigPage: false, isSelector: false }),
    },
  });
  const available = computed(
    () =>
      (Array.isArray(props.option.series) && props.option.series[0] && props.option.series[0].data) ||
      (Array.isArray(props.option.series.data) && props.option.series.data[0]),
  );
  onMounted(async () => {
    await setOptions(props.option);
    chartRef.value && addResizeListener(unref(chartRef), resize);
    instanceEvent();
  });

  function instanceEvent() {
    setTimeout(() => {
      const instance = getInstance();

      if (!instance) {
        return;
      }

      instance.on("click", (params: EventParams) => {
        currentParams.value = params;
        if (props.option.series.type === "sankey") {
          emits("select", currentParams.value);
          return;
        }
        instance.dispatchAction({
          type: "hideTip",
        });
        visMenus.value = true;
        if (!chartRef.value) {
          return;
        }
        const w = chartRef.value.getBoundingClientRect().width || 0;
        const h = chartRef.value.getBoundingClientRect().height || 0;
        if (w - params.event.offsetX > 120) {
          menuPos.x = params.event.offsetX;
        } else {
          menuPos.x = params.event.offsetX - 120;
        }
        if (h - params.event.offsetY < 50) {
          menuPos.y = params.event.offsetY - 40;
        } else {
          menuPos.y = params.event.offsetY;
        }
      });
      if (props.option.series.type === "sankey") {
        return;
      }
      instance.on("mouseover", () => {
        visMenus.value = false;
      });
      instance.on("mouseout", () => {
        instance.dispatchAction({
          type: "hideTip",
        });
      });
      document.addEventListener(
        "click",
        () => {
          if (instance.isDisposed()) {
            return;
          }
          visMenus.value = false;
          instance.dispatchAction({
            type: "hideTip",
          });
          instance.dispatchAction({
            type: "updateAxisPointer",
            currTrigger: "leave",
          });
        },
        true,
      );
    }, 1000);
  }

  function associateMetrics() {
    emits("select", currentParams.value);
    updateOptions(currentParams.value || undefined);
  }

  function updateOptions(params?: EventParams) {
    const instance = getInstance();
    if (!instance) {
      return;
    }
    if (!props.filters) {
      return;
    }
    if (props.filters.isRange) {
      const { eventAssociate } = useAssociateProcessor({
        filters: props.filters,
        option: props.option,
        relatedTrace: props.relatedTrace,
      } as AssociateProcessorProps);
      const options = eventAssociate();
      setOptions(options || props.option);
    } else {
      instance.dispatchAction({
        type: "showTip",
        dataIndex: params ? params.dataIndex : props.filters.dataIndex,
        seriesIndex: params ? params.seriesIndex : 0,
      });
    }
  }

  function viewTrace() {
    const item = useAssociateProcessor({
      filters: props.filters,
      option: props.option,
      relatedTrace: props.relatedTrace,
    } as AssociateProcessorProps).traceFilters(currentParams.value);

    traceOptions.value = {
      ...traceOptions.value,
      filters: item,
    };
    showTrace.value = true;
    visMenus.value = true;
  }

  function hideTooltips() {
    const instance = getInstance();
    instance.dispatchAction({
      type: "hideTip",
    });
  }

  function changeLegend(names: string[]) {
    const instance = getInstance();
    for (const item of props.option.legend.data) {
      if (names.includes(item.name)) {
        instance.dispatchAction({
          type: "legendSelect",
          name: item.name,
        });
      } else {
        instance.dispatchAction({
          type: "legendUnSelect",
          name: item.name,
        });
      }
    }
  }

  watch(
    () => props.option,
    (newVal, oldVal) => {
      if (!available.value) {
        return;
      }
      if (JSON.stringify(newVal) === JSON.stringify(oldVal)) {
        return;
      }
      let options;
      if (props.filters?.isRange) {
        const { eventAssociate } = useAssociateProcessor({
          filters: props.filters,
          option: props.option,
          relatedTrace: props.relatedTrace,
        } as AssociateProcessorProps);
        options = eventAssociate();
      }
      setOptions(options || props.option);
    },
  );
  watch(
    () => props.filters,
    () => {
      updateOptions();
    },
  );

  onBeforeUnmount(() => {
    removeResizeListener(unref(chartRef), resize);
  });
</script>
<style lang="scss" scoped>
  .no-data {
    font-size: $font-size-smaller;
    height: 100%;
    align-items: center;
    justify-content: center;
    display: flex;
    color: var(--text-color-placeholder);
  }

  .chart {
    overflow: hidden;
    flex: 1;
  }

  .menus {
    position: absolute;
    display: block;
    white-space: nowrap;
    z-index: 9999999;
    box-shadow: var(--sw-topology-box-shadow);
    transition: all cubic-bezier(0.075, 0.82, 0.165, 1) linear;
    background-color: var(--sw-bg-color-overlay);
    border-radius: 4px;
    color: $font-color;
    padding: 5px;
  }

  .tools {
    padding: 5px;
    color: #999;
    cursor: pointer;

    &:hover {
      color: $active-color;
      background-color: $popper-hover-bg-color;
    }
  }
</style>
