<template>
  <div class="panel chemicals-stats">
    <div class="border-beam"></div>
    <svg class="pc tl" viewBox="0 0 14 14"><path d="M0 14 V0 H14" fill="none" stroke="rgba(30,144,255,0.85)" stroke-width="1.5"/></svg>
    <svg class="pc tr" viewBox="0 0 14 14"><path d="M0 14 V0 H14" fill="none" stroke="rgba(30,144,255,0.85)" stroke-width="1.5"/></svg>
    <svg class="pc bl" viewBox="0 0 14 14"><path d="M0 14 V0 H14" fill="none" stroke="rgba(30,144,255,0.85)" stroke-width="1.5"/></svg>
    <svg class="pc br" viewBox="0 0 14 14"><path d="M0 14 V0 H14" fill="none" stroke="rgba(30,144,255,0.85)" stroke-width="1.5"/></svg>

    <div class="panel-header">
      <div class="panel-header-icon">⚗️</div>
      <span class="panel-title">化学品库存动态统计</span>
    </div>

    <div style="padding:12px 20px 15px;display:flex;gap:15px;height:calc(100% - 82px)">
      <!-- 左侧: 饼图 -->
      <div style="flex:1;min-width:0;display:flex;flex-direction:column">
        <div ref="chemPieChart" style="flex:1;min-height:0"></div>
      </div>
      <!-- 右侧: 存量统计 -->
      <div style="flex:0 0 380px;display:flex;flex-direction:column;gap:14px;justify-content:center">
        <!-- 总量 -->
        <div class="chem-stat-card total">
          <div class="csc-label-a">存量化学品总量</div>
          <div class="csc-value-a">{{ totalAmount.toLocaleString() }}<span class="csc-unit">L</span></div>
        </div>
        <!-- 管控 -->
        <div class="chem-stat-card ctrl">
          <div style="display:flex;justify-content:space-between;align-items:flex-start">
            <div>
              <div class="csc-label">管控类化学品</div>
              <div class="csc-value">{{ ctrlAmount }}<span class="csc-unit">L</span></div>
            </div>
            <div class="csc-pct-ring">
              <svg viewBox="0 0 60 60" width="80" height="80">
                <circle cx="30" cy="30" r="24" fill="none" stroke="rgba(239,68,68,0.12)" stroke-width="6"/>
                <circle cx="30" cy="30" r="24" fill="none" stroke="#ef4444" stroke-width="6"
                  :stroke-dasharray="ctrlDash"
                  stroke-linecap="round" transform="rotate(-90 30 30)"
                  style="filter:drop-shadow(0 0 4px rgba(239,68,68,0.7))"/>
                <text x="30" y="35" text-anchor="middle" fill="#ef4444" font-size="11" font-weight="700" font-family="Arial">{{ ctrlPct }}%</text>
              </svg>
            </div>
          </div>
          <div class="csc-sub">占总量 {{ ctrlPct }}% · 共 {{ ctrlCategories }} 类目</div>
        </div>
        <!-- 非管控 -->
        <div class="chem-stat-card free">
          <div style="display:flex;justify-content:space-between;align-items:flex-start">
            <div>
              <div class="csc-label">非管控类化学品</div>
              <div class="csc-value" style="color:#00d8ff">{{ freeAmount }}<span class="csc-unit">L</span></div>
            </div>
            <div>
              <svg viewBox="0 0 60 60" width="80" height="80">
                <circle cx="30" cy="30" r="24" fill="none" stroke="rgba(0,216,255,0.12)" stroke-width="6"/>
                <circle cx="30" cy="30" r="24" fill="none" stroke="#00d8ff" stroke-width="6"
                  :stroke-dasharray="freeDash"
                  stroke-linecap="round" transform="rotate(-90 30 30)"
                  style="filter:drop-shadow(0 0 4px rgba(0,216,255,0.7))"/>
                <text x="30" y="35" text-anchor="middle" fill="#00d8ff" font-size="11" font-weight="700" font-family="Arial">{{ freePct }}%</text>
              </svg>
            </div>
          </div>
          <div class="csc-sub" style="color:rgba(0,216,255,0.55)">占总量 {{ freePct }}% · 共 {{ freeCategories }} 类目</div>
        </div>
        <!-- 类目总数 -->
        <div class="chem-stat-card cat">
          <div class="csc-label">存量化学品总类目数</div>
          <div style="display:flex;align-items:baseline;gap:12px;margin-top:8px">
            <div class="csc-value" style="color:#ffd740">{{ ctrlCategories + freeCategories }}<span class="csc-unit">类</span></div>
            <div style="display:flex;gap:6px;align-items:center">
              <span style="font-size:22px;color:rgba(239,68,68,0.8)">管控 {{ ctrlCategories }}类</span>
              <span style="font-size:20px;color:rgba(168,204,232,0.3)">|</span>
              <span style="font-size:22px;color:rgba(0,216,255,0.8)">非管控 {{ freeCategories }}类</span>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import * as echarts from 'echarts'

const C = 2 * Math.PI * 24 // circumference r=24 ~150.8

export default {
  name: 'ChemicalsStats',
  data() {
    return {
      totalAmount: 1229,
      ctrlAmount: 269,
      freeAmount: 960,
      ctrlCategories: 5,
      freeCategories: 5,
      chart: null
    }
  },
  computed: {
    ctrlPct() {
      return Math.round(this.ctrlAmount / (this.totalAmount || 1) * 1000) / 10
    },
    freePct() {
      return Math.round(this.freeAmount / (this.totalAmount || 1) * 1000) / 10
    },
    ctrlDash() {
      const arc = Math.round(this.ctrlPct / 100 * C * 10) / 10
      return `${arc} ${C}`
    },
    freeDash() {
      const arc = Math.round(this.freePct / 100 * C * 10) / 10
      return `${arc} ${C}`
    }
  },
  mounted() {
    this.$nextTick(() => this.initChart())
  },
  beforeDestroy() {
    if (this.chart) this.chart.dispose()
    window.removeEventListener('resize', this.handleResize)
  },
  methods: {
    initChart() {
      this.chart = echarts.init(this.$refs.chemPieChart, null, { renderer: 'canvas', devicePixelRatio: 2 })
      this.chart.setOption({
        backgroundColor: 'transparent',
        tooltip: {
          trigger: 'item',
          formatter: '{b}: {c}L ({d}%)',
          backgroundColor: 'rgba(3,14,42,0.92)',
          borderColor: 'rgba(30,144,255,0.3)',
          textStyle: { color: '#a8cce8', fontSize: 22 }
        },
        graphic: [
          // { type: 'text', left: 'center', top: '36%', style: { text: String(this.totalAmount), fill: '#ffd740', font: 'bold 44px Arial', textAlign: 'center' } },
          // { type: 'text', left: 'center', top: '55%', style: { text: '化学品总量（L）', fill: 'rgba(168,204,232,0.65)', font: '20px Arial', textAlign: 'center' } }
        ],
        legend: {
          show:false,
          orient: 'horizontal', bottom: '2%', icon: 'circle',
          itemWidth: 24, itemHeight: 24, itemGap: 30,
          textStyle: { color: '#a8cce8', fontSize: 22 }
        },
        series: [{
          type: 'pie', radius: ['32%', '62%'], center: ['50%', '52%'],
          avoidLabelOverlap: true,
          label: {
            show: true, position: 'outside',
            formatter: params => `{name|${params.name}}\n{val|${params.value}L  ${params.percent}%}`,
            rich: {
              name: { fontSize: 24, color: '#a8cce8', lineHeight: 30 },
              val:  { fontSize: 22, color: '#ffd740', lineHeight: 26 }
            },
            distanceToLabelLine: 10
          },
          labelLine: { show: true, length: 25, length2: 35, lineStyle: { color: 'rgba(168,204,232,0.5)' } },
          data: [
            { value: this.ctrlAmount,  name: '管控类',   itemStyle: { color: '#ef4444', shadowBlur: 10, shadowColor: 'rgba(239,68,68,0.6)' } },
            { value: this.freeAmount,  name: '非管控类', itemStyle: { color: '#00d8ff', shadowBlur: 10, shadowColor: 'rgba(0,216,255,0.6)' } }
          ],
          emphasis: { label: { fontSize: 26, fontWeight: 'bold' }, scale: true, scaleSize: 8 }
        }]
      })
      window.addEventListener('resize', this.handleResize)
    },
    handleResize() {
      if (this.chart) this.chart.resize()
    }
  }
}
</script>

<style lang="scss" scoped>
.chemicals-stats {
  position: relative;
  display: flex;
  flex-direction: column;
  border-radius: 15px;
  overflow: hidden;
  background: $bg-panel;
  border: 1px solid $border;
}

/* ---- Border beam ---- */
.border-beam {
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  overflow: hidden;
  z-index: 2;

  &::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 40%; height: 3px;
    background: linear-gradient(90deg, transparent, rgba(30,144,255,0.9), rgba(0,216,255,0.7), transparent);
    animation: beamTop 5s linear infinite;
  }

  &::after {
    content: '';
    position: absolute;
    bottom: 0; right: -100%;
    width: 40%; height: 3px;
    background: linear-gradient(90deg, transparent, rgba(0,216,255,0.7), rgba(30,144,255,0.9), transparent);
    animation: beamBottom 5s linear infinite 2.5s;
  }
}

@keyframes beamTop    { from { left: -40%; }  to { left: 100%; } }
@keyframes beamBottom { from { right: -40%; } to { right: 100%; } }

/* ---- Corner ornaments ---- */
.pc {
  position: absolute;
  width: 35px; height: 35px;
  z-index: 3; pointer-events: none;
  &.tl { top: 0; left: 0; }
  &.tr { top: 0; right: 0; transform: scaleX(-1); }
  &.bl { bottom: 0; left: 0; transform: scaleY(-1); }
  &.br { bottom: 0; right: 0; transform: scale(-1); }
}

/* ---- Panel header ---- */
.panel-header {
  display: flex;
  align-items: center;
  gap: 25px;
  padding: 20px 30px 18px;
  border-bottom: 1px solid $border;
  background: linear-gradient(90deg, rgba(0,60,160,0.18), transparent);
  flex-shrink: 0;
}

.panel-header-icon {
  width: 65px; height: 65px;
  border-radius: 12px;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 32px;
  background: linear-gradient(135deg, rgba(30,144,255,0.25), rgba(0,216,255,0.15));
  border: 1px solid rgba(30,144,255,0.35);
  animation: iconGlow 3s ease-in-out infinite;
}

@keyframes iconGlow {
  0%, 100% { box-shadow: 0 0 15px rgba(30,144,255,0.3); }
  50%       { box-shadow: 0 0 35px rgba(30,144,255,0.7), 0 0 12px rgba(0,216,255,0.3); }
}

.panel-title {
  font-size: 30px;
  font-weight: 600;
  letter-spacing: 2px;
  color: $cyan;
}

/* ---- Stat cards ---- */
.chem-stat-card {
  border-radius: 10px;
  padding: 16px 20px;
  border: 1px solid $border;
  background: $bg-card;

  &.total { border-color: rgba(0,216,255,0.3);  background: rgba(0,216,255,0.05); }
  &.ctrl  { border-color: rgba(239,68,68,0.3);  background: rgba(239,68,68,0.05); }
  &.free  { border-color: rgba(0,216,255,0.3);  background: rgba(0,216,255,0.05); }
  &.cat   { border-color: rgba(255,215,64,0.2); background: rgba(255,215,64,0.04); }
}

.csc-label {
  font-size: 24px;
  color: $text-dim;
  margin-bottom: 6px;
  letter-spacing: 1px;
}
.csc-label-a{
  font-size: 24px;
  color: $text-dim;
  margin-bottom: 6px;
  letter-spacing: 1px;
  text-align: center;
}

.csc-value {
  font-size: 44px;
  font-weight: 700;
  color: #ef4444;
  line-height: 1.1;
}
.csc-value-a{
  font-size: 44px;
  font-weight: 700;
  color: #fff;
  line-height: 1.1;
  text-align: center;
}

.csc-unit {
  font-size: 24px;
  font-weight: 400;
  color: $text-dim;
  margin-left: 4px;
}

.csc-sub {
  font-size: 22px;
  color: rgba(239,68,68,0.55);
  margin-top: 8px;
}

.csc-pct-ring { flex-shrink: 0; }
</style>
