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RamEx-Flow
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<template>
  <div class="loading-container" v-if="isLoading">
    <div class="loading-spinner">
      <div class="spinner-ring" ref="ring1"></div>
      <div class="spinner-ring" ref="ring2"></div>
      <div class="spinner-ring" ref="ring3"></div>
      <div class="spinner-dot" ref="dot"></div>
    </div>
    <p class="loading-text">{{ loadingText }}</p>
  </div>
</template>

<script setup lang="ts">
import { ref, onMounted, watch } from 'vue'
import { gsap } from 'gsap'

// 定义组件名称
defineOptions({
  name: 'LoadingSpinner'
})

interface Props {
  isLoading: boolean
  loadingText?: string
}

const props = withDefaults(defineProps<Props>(), {
  loadingText: '加载中...'
})

const ring1 = ref<HTMLElement>()
const ring2 = ref<HTMLElement>()
const ring3 = ref<HTMLElement>()
const dot = ref<HTMLElement>()

onMounted(() => {
  if (props.isLoading) {
    startAnimation()
  }
})

watch(() => props.isLoading, (newVal) => {
  if (newVal) {
    startAnimation()
  } else {
    stopAnimation()
  }
})

const startAnimation = () => {
  if (!ring1.value || !ring2.value || !ring3.value || !dot.value) return
  
  // 外环动画
  gsap.to(ring1.value, {
    rotation: 360,
    duration: 2,
    ease: "none",
    repeat: -1
  })
  
  // 中环动画
  gsap.to(ring2.value, {
    rotation: -360,
    duration: 1.5,
    ease: "none",
    repeat: -1
  })
  
  // 内环动画
  gsap.to(ring3.value, {
    rotation: 360,
    duration: 1,
    ease: "none",
    repeat: -1
  })
  
  // 中心点脉冲动画
  gsap.to(dot.value, {
    scale: 1.2,
    duration: 0.8,
    ease: "power2.inOut",
    repeat: -1,
    yoyo: true
  })
}

const stopAnimation = () => {
  gsap.killTweensOf([ring1.value, ring2.value, ring3.value, dot.value])
}
</script>

<style scoped>
.loading-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

.loading-spinner {
  position: relative;
  width: 80px;
  height: 80px;
  margin-bottom: 2rem;
}

.spinner-ring {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 3px solid transparent;
  border-radius: 50%;
}

.spinner-ring:nth-child(1) {
  border-top-color: var(--ramex-accent);
  border-right-color: var(--ramex-accent);
}

.spinner-ring:nth-child(2) {
  width: 60px;
  height: 60px;
  top: 10px;
  left: 10px;
  border-top-color: var(--ramex-text-secondary);
  border-left-color: var(--ramex-text-secondary);
}

.spinner-ring:nth-child(3) {
  width: 40px;
  height: 40px;
  top: 20px;
  left: 20px;
  border-top-color: var(--ramex-text-muted);
  border-right-color: var(--ramex-text-muted);
}

.spinner-dot {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 12px;
  height: 12px;
  background: var(--ramex-accent);
  border-radius: var(--ramex-radius);
  transform: translate(-50%, -50%);
}

.loading-text {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--ramex-text-secondary);
  margin: 0;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 0.6;
  }
  50% {
    opacity: 1;
  }
}
</style>