<template>
  <div class="dv-running-circle-value" :ref="ref">
    <svg :width="`${svgSize[0]}px`"
         :height="`${svgSize[1]}px`"
         :style="`transform:scale(${svgScale[0]},${svgScale[1]});`">
      <defs>
        <polygon :id="polygonId" points="15, 46.5, 21, 47.5, 21, 52.5, 15, 53.5" />
      </defs>

      <circle
              cx="50"
              cy="50"
              r="45"
              fill="transparent"
              :stroke="mergedColor[1]"
              stroke-width="10"
              stroke-dasharray="80, 100, 30, 100">
        <animateTransform
                attributeName="transform"
                type="rotate"
                values="0 50 50;360 50 50"
                :dur="`${duration}s`"
                repeatCount="indefinite"/>
      </circle>

      <circle
              cx="50"
              cy="50"
              r="45"
              fill="transparent"
              :stroke="mergedColor[0]"
              stroke-width="6"
              stroke-dasharray="50, 66, 100, 66">
        <animateTransform
                attributeName="transform"
                type="rotate"
                values="0 50 50;-360 50 50"
                :dur="`${duration}s`"
                repeatCount="indefinite"/>
      </circle>

      <circle
              cx="50"
              cy="50"
              r="38"
              fill="transparent"
              :stroke="fade(mergedColor[1] || defaultColor[1], 30)"
              stroke-width="1"
              stroke-dasharray="5, 1"/>

      <use
              v-for="(foo, i) in new Array(20).fill(0)"
              :key="i"
              :xlink:href="`#${polygonId}`"
              :stroke="mergedColor[1]"
              :fill="Math.random() > 0.4 ? 'transparent' : mergedColor[0]">
        <animateTransform
                attributeName="transform"
                type="rotate"
                values="0 50 50;360 50 50"
                :dur="`${duration}s`"
                :begin="`${i * duration / 20}s`"
                repeatCount="indefinite"/>
      </use>

      <circle
              cx="50"
              cy="50"
              r="26"
              fill="transparent"
              :stroke="fade(mergedColor[1] || defaultColor[1], 30)"
              stroke-width="1"
              stroke-dasharray="5, 1"/>
    </svg>
    <slot></slot>
  </div>
</template>

<script>
  import {uuid} from "../../../utils/utils";
  import { deepClone } from 'canknow-core/src/libs/object';
  import { merge } from 'canknow-core/src/libs/object';
  import AutoResize from "../../../mixins/AutoResize";
  import { fade } from '@jiaminghi/color';

  export default {
    name: 'DvRunningCircleValue',
    mixins: [AutoResize],
    props: {
      color: {
        type: Array,
        default: () => ([])
      },
      duration: {
        type: Number,
        default: 3
      }
    },
    data () {
      const id = uuid()
      return {
        ref: 'runningCircleValue',
        polygonId: `runningCircleValue-polygon-${id}`,
        svgSize: [100, 100],
        svgScale: [1, 1],
        defaultColor: ['rgba(3, 166, 224, 0.8)', 'rgba(3, 166, 224, 0.5)'],
        mergedColor: []
      }
    },
    watch: {
      color () {
        const { mergeColor } = this;
        mergeColor();
      }
    },
    methods: {
      afterAutoResizeMixinInitialize () {
        const { calcScale } = this;
        calcScale();
      },
      calcScale () {
        const { width, height, svgSize } = this;
        const [w, h] = svgSize;
        this.svgScale = [width / w, height / h];
      },
      onResize () {
        const { calcScale } = this;
        calcScale();
      },
      mergeColor () {
        const { color, defaultColor } = this;
        this.mergedColor = merge(deepClone(defaultColor, true), color || []);
      },
      fade
    },
    mounted () {
      const { mergeColor } = this;
      mergeColor();
    }
  };
</script>
