<template>
  <div class="scroll-progress">
    <div class="progress-bar" :style="{ width: `${scrollProgress}%` }"></div>
  </div>
</template>

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

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

const scrollProgress = ref(0)

const updateScrollProgress = () => {
  const scrollTop = window.pageYOffset || document.documentElement.scrollTop
  const scrollHeight = document.documentElement.scrollHeight - document.documentElement.clientHeight
  const progress = (scrollTop / scrollHeight) * 100
  scrollProgress.value = Math.min(100, Math.max(0, progress))
}

onMounted(() => {
  window.addEventListener('scroll', updateScrollProgress)
  updateScrollProgress()
})

onUnmounted(() => {
  window.removeEventListener('scroll', updateScrollProgress)
})
</script>

<style scoped>
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: rgba(0, 0, 0, 0.1);
  z-index: 9999;
}

.progress-bar {
  height: 100%;
  background: var(--ramex-accent);
  transition: width 0.1s ease;
  box-shadow: 0 0 10px rgba(102, 126, 234, 0.5);
}
</style>
