<template>
    <div class="hc-bar-chart-box">
        <div ref="echart" class="hc-bar-chart-echarts" :style="`width : ${chart?.clientWidth}px`"/>
    </div>
</template>

<script setup>
import * as echarts from 'echarts'
import { nextTick, onMounted, onUnmounted, ref, watch } from 'vue'
const props = defineProps({
    datas: {
        type: Array,
        default: () => ([])
    },
})

//初始变量
let chart = null;
const echart = ref(null)
const datas = ref(props.datas)

//监听
watch(() => [
    props.datas
], ([data]) => {
    datas.value = data
    setOptions(data)
})

//初始化图表
const initChart = () => {
    chart = echarts.init(echart.value)
    setOptions(props.datas)
}

//监听浏览器窗口变化
const windowResize = () => {
    window.addEventListener("resize", resizeEvent);
}

const resizeEvent = () => {
    window.requestAnimationFrame(() => {
        chart.resize();
    })
}

//设置图表
const setOptions = (AxisData) => {
    chart.setOption({
        tooltip: {
            trigger: 'item'
        },
        color: ['#5279AE','#F5CC71','#B8595A','#67B57E'],
        series: [
            {
                type: 'pie',
                radius: '80%',
                center: ["50%", "45%"],
                data: AxisData,
                emphasis: {
                    itemStyle: {
                        shadowBlur: 10,
                        shadowOffsetX: 0,
                        shadowColor: 'rgba(0, 0, 0, 0.4)'
                    }
                },
                label:{
                    formatter: '{b}\ {c}',
                }
            }
        ]
    })
}

//渲染完成
onMounted(() => {
    nextTick(() => {
        initChart()
        windowResize()
    })
})

//被卸载
onUnmounted(() => {
    window.removeEventListener("resize",resizeEvent);
    chart.dispose()
    chart = null
})

const onResize = () => {
    nextTick(() => {
        chart.resize();
    })
}

// 暴露出去
defineExpose({
    onResize
})
</script>

<style lang="scss" scoped>
.hc-bar-chart-box {
    height: 100%;
    overflow: hidden;
    position: relative;
    .hc-bar-chart-echarts {
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        z-index: 2;
        width: 100%;
        height: 100%;
    }
}
</style>
