<template>
  <!--
    AI 生成专属 Loading（对齐 PC PrescriptionLoading 视觉）
    仅用于真正调用 AI 生成接口时；历史加载请用普通文案/u-loading
    type: prescription=药丸 / medical_record=病历本
  -->
  <view class="ai-load">
    <view class="ai-load__stage">
      <view class="ai-load__ring" />
      <view class="ai-load__arc" />
      <view class="ai-load__cross ai-load__cross--1" />
      <view class="ai-load__cross ai-load__cross--2" />
      <view class="ai-load__cross ai-load__cross--3" />
      <!-- 中心图标：处方药丸 -->
      <view v-if="type !== 'medical_record'" class="ai-load__pill">
        <view class="ai-load__pill-left" />
        <view class="ai-load__pill-right" />
      </view>
      <!-- 中心图标：病历本 -->
      <view v-else class="ai-load__mr">
        <view class="ai-load__mr-spine" />
        <view class="ai-load__mr-title" />
        <view class="ai-load__mr-line" />
        <view class="ai-load__mr-line" />
        <view class="ai-load__mr-line" />
      </view>
    </view>
    <view class="ai-load__text-row">
      <text class="ai-load__text">{{ displayText }}</text>
      <view class="ai-load__dots">
        <view class="ai-load__dot ai-load__dot--1" />
        <view class="ai-load__dot ai-load__dot--2" />
        <view class="ai-load__dot ai-load__dot--3" />
      </view>
    </view>
  </view>
</template>

<script>
/**
 * AI 生成 Loading
 * 用 CSS 动画贴近 PC 端 canvas 效果，避免小程序 canvas 生命周期问题
 */
export default {
  name: 'AiGenerationLoading',
  props: {
    /** prescription | medical_record */
    type: {
      type: String,
      default: 'prescription',
    },
    /** 底部文案；空则按 type 给默认 */
    text: {
      type: String,
      default: '',
    },
  },
  computed: {
    displayText() {
      const t = String(this.text || '').trim()
      if (t) return t
      return this.type === 'medical_record' ? 'AI正在生成病历' : 'AI正在生成处方'
    },
  },
}
</script>

<style scoped>
.ai-load {
  width: 100%;
  min-height: 420rpx;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24rpx 0 40rpx;
  box-sizing: border-box;
}
.ai-load__stage {
  position: relative;
  width: 280rpx;
  height: 280rpx;
}
.ai-load__ring {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 220rpx;
  height: 220rpx;
  margin-left: -110rpx;
  margin-top: -110rpx;
  border-radius: 50%;
  border: 2rpx dashed rgba(180, 195, 200, 0.55);
  box-sizing: border-box;
  animation: ai-load-spin 12s linear infinite;
}
.ai-load__arc {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 220rpx;
  height: 220rpx;
  margin-left: -110rpx;
  margin-top: -110rpx;
  border-radius: 50%;
  border: 6rpx solid transparent;
  border-top-color: #3dd6d0;
  border-right-color: #3dd6d0;
  box-sizing: border-box;
  animation: ai-load-spin 1.4s linear infinite;
}
.ai-load__cross {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 16rpx;
  height: 16rpx;
  margin-left: -8rpx;
  margin-top: -8rpx;
}
.ai-load__cross::before,
.ai-load__cross::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  background: #3dd6d0;
  border-radius: 4rpx;
}
.ai-load__cross::before {
  width: 16rpx;
  height: 4rpx;
  margin-left: -8rpx;
  margin-top: -2rpx;
}
.ai-load__cross::after {
  width: 4rpx;
  height: 16rpx;
  margin-left: -2rpx;
  margin-top: -8rpx;
}
.ai-load__cross--1 {
  animation: ai-load-orbit 3.2s linear infinite;
}
.ai-load__cross--2 {
  animation: ai-load-orbit 3.2s linear infinite;
  animation-delay: -1.06s;
}
.ai-load__cross--3 {
  animation: ai-load-orbit 3.2s linear infinite;
  animation-delay: -2.13s;
}
.ai-load__pill {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 140rpx;
  height: 48rpx;
  margin-left: -70rpx;
  margin-top: -24rpx;
  border-radius: 24rpx;
  overflow: hidden;
  display: flex;
  flex-direction: row;
  box-shadow: 0 8rpx 20rpx rgba(0, 0, 0, 0.12);
  animation: ai-load-float 2.2s ease-in-out infinite;
}
.ai-load__pill-left {
  width: 50%;
  height: 100%;
  background: linear-gradient(90deg, #fdfbf7, #ede8df);
}
.ai-load__pill-right {
  width: 50%;
  height: 100%;
  background: linear-gradient(90deg, #5dd9d1, #2cb8b0);
}
.ai-load__mr {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 100rpx;
  height: 120rpx;
  margin-left: -50rpx;
  margin-top: -60rpx;
  background: #fff;
  border-radius: 10rpx;
  border: 2rpx solid rgba(180, 200, 200, 0.55);
  box-shadow: 0 8rpx 20rpx rgba(0, 0, 0, 0.12);
  box-sizing: border-box;
  padding: 18rpx 12rpx 12rpx 28rpx;
  display: flex;
  flex-direction: column;
  animation: ai-load-float 2.2s ease-in-out infinite;
}
.ai-load__mr-spine {
  position: absolute;
  left: 0;
  top: 6rpx;
  bottom: 6rpx;
  width: 16rpx;
  background: #3dd6d0;
  border-radius: 0 4rpx 4rpx 0;
}
.ai-load__mr-title {
  width: 60%;
  height: 12rpx;
  border-radius: 4rpx;
  background: rgba(61, 214, 208, 0.35);
  margin-bottom: 14rpx;
}
.ai-load__mr-line {
  width: 100%;
  height: 6rpx;
  border-radius: 3rpx;
  background: rgba(61, 214, 208, 0.3);
  margin-bottom: 12rpx;
}
.ai-load__text-row {
  margin-top: 28rpx;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
}
.ai-load__text {
  font-size: 28rpx;
  color: #4a5568;
  animation: ai-load-blink 1.6s ease-in-out infinite;
}
.ai-load__dots {
  display: flex;
  flex-direction: row;
  margin-left: 10rpx;
}
.ai-load__dot {
  width: 8rpx;
  height: 8rpx;
  border-radius: 50%;
  background: #3dd6d0;
  margin-left: 8rpx;
  opacity: 0.25;
}
.ai-load__dot--1 {
  animation: ai-load-dot 1.4s ease-in-out infinite;
}
.ai-load__dot--2 {
  animation: ai-load-dot 1.4s ease-in-out infinite;
  animation-delay: 0.2s;
}
.ai-load__dot--3 {
  animation: ai-load-dot 1.4s ease-in-out infinite;
  animation-delay: 0.4s;
}
@keyframes ai-load-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}
@keyframes ai-load-float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10rpx);
  }
}
@keyframes ai-load-blink {
  0%,
  100% {
    opacity: 0.55;
  }
  50% {
    opacity: 1;
  }
}
@keyframes ai-load-dot {
  0%,
  100% {
    opacity: 0.2;
    transform: scale(0.85);
  }
  50% {
    opacity: 1;
    transform: scale(1.15);
  }
}
@keyframes ai-load-orbit {
  from {
    transform: rotate(0deg) translateX(110rpx) rotate(0deg);
  }
  to {
    transform: rotate(360deg) translateX(110rpx) rotate(-360deg);
  }
}
</style>
