<template>
  <div class="go-tables-rank" :style="`color: ${textColor}`">
    <div v-for="(item, i) in status.rows" :key="item.toString() + item.scroll" class="row-item" :style="`height: ${status.heights[i]}px;`">
      <div class="ranking-info">
        <div class="rank" :style="`color: ${color};font-size: ${indexFontSize}px`">No.{{ item.ranking }}</div>
        <div class="info-name" :style="`font-size: ${leftFontSize}px`" v-html="item.name" />
        <div class="ranking-value" :style="`color: ${textColor};font-size: ${rightFontSize}px`">
          {{ status.mergedConfig.valueFormatter ? status.mergedConfig.valueFormatter(item) : item.value }}
          {{ unit }}
        </div>
      </div>
      <div class="ranking-column" :style="`border-color: ${borderColor}`">
        <div class="inside-column" :style="`width: ${item.percent}%;background-color: ${color}`">
          <div class="shine" />
        </div>
      </div>
    </div>
  </div>
</template>

<script setup name="custom-rank-list">
import { onUnmounted, reactive, toRefs, watch } from 'vue';

const props = defineProps({
  chartConfig: {
    type: Object,
    required: true,
  },
});
const { w, h } = toRefs(props.chartConfig.attr);
const { rowNum, unit, color, textColor, borderColor, indexFontSize, leftFontSize, rightFontSize } = toRefs(props.chartConfig.option);

const status = reactive({
  mergedConfig: props.chartConfig.option,
  rowsData: [],
  rows: [
    {
      scroll: 0,
      ranking: 1,
      name: '',
      value: '',
      percent: 0,
    },
  ],
  heights: [0],
  animationIndex: 0,
  animationHandler: 0,
  updater: 0,
  avgHeight: 0,
});

const calcRowsData = () => {
  let { dataset, rowNum, sort } = status.mergedConfig;
  // @ts-ignore
  sort &&
    dataset.sort(({ value: a }, { value: b }) => {
      if (a > b) return -1;
      if (a < b) return 1;
      if (a === b) return 0;
    });
  // @ts-ignore
  const value = dataset.map(({ value }) => value);
  const min = Math.min(...value) || 0;
  // abs of min
  const minAbs = Math.abs(min);
  const max = Math.max(...value) || 0;
  // abs of max
  const maxAbs = Math.abs(max);
  const total = max + minAbs;
  dataset = dataset.map((row, i) => ({
    ...row,
    ranking: i + 1,
    percent: ((row.value + minAbs) / total) * 100,
  }));
  const rowLength = dataset.length;
  if (rowLength > rowNum && rowLength < 2 * rowNum) {
    dataset = [...dataset, ...dataset];
  }
  dataset = dataset.map((d, i) => ({ ...d, scroll: i }));
  status.rowsData = dataset;
  status.rows = dataset;
};

const calcHeights = (onresize = false) => {
  const { rowNum, dataset } = status.mergedConfig;
  const avgHeight = h.value / rowNum;
  status.avgHeight = avgHeight;

  if (!onresize) status.heights = new Array(dataset.length).fill(avgHeight);
};

const animation = async (start = false) => {
  let { avgHeight, animationIndex, mergedConfig, rowsData, updater } = status;
  const { waitTime, carousel, rowNum } = mergedConfig;
  const rowLength = rowsData.length;
  if (rowNum >= rowLength) return;
  if (start) {
    await new Promise((resolve) => setTimeout(resolve, waitTime));
    if (updater !== status.updater) return;
  }
  const animationNum = carousel === 'single' ? 1 : rowNum;
  let rows = rowsData.slice(animationIndex);
  rows.push(...rowsData.slice(0, animationIndex));
  status.rows = rows.slice(0, rowNum + 1);
  status.heights = new Array(rowLength).fill(avgHeight);
  await new Promise((resolve) => setTimeout(resolve, 300));
  if (updater !== status.updater) return;
  status.heights.splice(0, animationNum, ...new Array(animationNum).fill(0));
  animationIndex += animationNum;
  const back = animationIndex - rowLength;
  if (back >= 0) animationIndex = back;

  status.animationIndex = animationIndex;
  status.animationHandler = setTimeout(animation, waitTime * 1000 - 300);
};

const stopAnimation = () => {
  status.updater = (status.updater + 1) % 999999;
  if (!status.animationHandler) return;
  clearTimeout(status.animationHandler);
};

const onRestart = async () => {
  try {
    if (!status.mergedConfig) return;
    let { dataset, rowNum, sort } = status.mergedConfig;
    stopAnimation();
    calcRowsData();
    let flag = true;
    if (dataset.length <= rowNum) {
      flag = false;
    }
    calcHeights(flag);
    animation(flag);
  } catch (error) {
    console.error(error);
  }
};

onRestart();

watch(
  () => w.value,
  () => {
    onRestart();
  }
);

watch(
  () => h.value,
  () => {
    onRestart();
  }
);

watch(
  () => rowNum.value,
  () => {
    onRestart();
  }
);

// 数据更新（配置时触发）
watch(
  () => props.chartConfig.option.dataset,
  () => {
    onRestart();
  },
  {
    deep: false,
  }
);

onUnmounted(() => {
  stopAnimation();
});
</script>

<style lang="scss" scoped>
.go-tables-rank {
  overflow: hidden;
  width: 100%;
  height: 100%;
  .row-item {
    display: flex;
    justify-content: center;
    overflow: hidden;
    transition: all 0.3s;
    flex-direction: column;
  }
  .ranking-info {
    display: flex;
    align-items: center;
    width: 100%;
    font-size: 13px;
    .rank {
      margin-right: 5px;
    }
    .info-name {
      flex: 1;
    }
  }
  .ranking-column {
    margin-top: 5px;
    border-bottom: 2px solid #1370fb80;
    .inside-column {
      position: relative;
      overflow: hidden;
      margin-bottom: 2px;
      height: 6px;
      border-radius: 1px;
    }
    .shine {
      position: absolute;
      top: 2px;
      left: 0%;
      width: 50px;
      height: 2px;
      background: radial-gradient(rgb(40 248 255) 5%, transparent 80%);
      transform: translateX(-100%);
      animation: shine 3s ease-in-out infinite alternate;
    }
  }
}

@keyframes shine {
  80% {
    left: 0;
    transform: translateX(-100%);
  }
  100% {
    left: 100%;
    transform: translateX(0%);
  }
}
</style>
