<template>
  <div class="home-container">

    <!-- 左下角背景装饰图 - bg@2x.png -->
    <div class="bottom-left-decoration"></div>

    <!-- 主要内容区域 -->
    <div class="main-content">
      <!-- 顶部Banner图片 -->
      <div class="banner-section">
        <img
          src="@/assets/images/02 西园戒幢律寺三坛大戒法会/banner@2x.png"
          alt="三坛大戒法会Banner"
          class="banner-image"
        />
      </div>

      <!-- 视频播放器区域 -->
      <div class="video-section">
        <VideoPlayer
          :video-url="videoUrl"
          video-id="home-video"
          :autoplay="false"
          :options="videoOptions"
        />
      </div>

      <!-- 法会流程容器 -->
      <div class="ceremony-wrapper">
        <!-- 法会流程 -->
        <div class="ceremony-process">
          <!-- 标题 -->
          <div class="ceremony-title">
            <img src="/src/assets/images/02 西园戒幢律寺三坛大戒法会/法會流程@2x.png" alt="法会流程" />
          </div>

          <!-- 流程步骤 -->
          <div class="process-container">
            <!-- 麻绳背景 -->
            <div class="rope-background"></div>

            <!-- 流程步骤 -->
            <div class="process-steps">
              <div
              v-for="(step, index) in processSteps"
              :key="index"
              class="process-step"
              :class="{ active: step.active }"
              @click="selectStep(index)"
            >
                <!-- 顶部白色圆形占位（选中状态） -->
                <div class="top-circle"></div>

                <!-- 步骤内容 -->
                <div class="step-content">
                  <span class="step-text">{{ step.name }}</span>
                </div>

                <!-- 底部箭头（选中状态） -->
                <div v-if="step.active" class="bottom-arrow">
                  <img src="/src/assets/images/02 西园戒幢律寺三坛大戒法会/点@2x.png" alt="选中" />
                </div>
              </div>
            </div>
          </div>
        </div>

        <!-- 法会流程内容 -->
        <div class="ceremony-intro">
          <div class="intro-container">
            <!-- 背景图片 -->
            <div class="intro-background"></div>

            <!-- 步骤标题 -->
            <div class="step-title" ref="stepTitleRef">
              <span class="step-title-text">{{ currentStep.name }}</span>
            </div>

            <!-- 装饰线 -->
            <div class="decorative-line" :style="decorativeLineStyle"></div>

            <!-- 查看更多按钮 -->
            <div class="more-button" @click="viewMore">
              <span class="more-text">查看更多</span>
            </div>

            <!-- 步骤描述（可选显示） -->
            <div class="step-description">
              <p>{{ currentStep.description }}</p>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script setup>
import { ref, computed, nextTick, onMounted, watch } from 'vue'
import VideoPlayer from '@/components/VideoPlayer.vue'

// 视频配置
const videoUrl = ref('/src/assets/images/02 西园戒幢律寺三坛大戒法会/sample-10s.mp4')

const videoOptions = ref({
  fluid: true,
  responsive: true,
  aspectRatio: '16:9',
  controls: true,
  preload: 'metadata',
  poster: '',
  playbackRates: [0.5, 1, 1.25, 1.5, 2],
  sources: [{
    src: '/src/assets/images/02 西园戒幢律寺三坛大戒法会/sample-10s.mp4',
    type: 'video/mp4'
  }]
})

// 法会流程步骤数据
const processSteps = ref([
  {
    name: '准备',
    active: true,
    description: '法会前的各项准备工作，包括场地布置、法器准备、戒子报到等重要环节。'
  },
  {
    name: '正式开堂',
    active: false,
    description: '三坛大戒法会正式开始，举行庄严的开堂仪式，宣布戒期开始。'
  },
  {
    name: '封堂洒净',
    active: false,
    description: '封闭戒堂，进行洒净仪式，为戒子们营造清净庄严的受戒环境。'
  },
  {
    name: '正授沙弥戒',
    active: false,
    description: '第一坛沙弥戒的正式传授，戒子们受持沙弥十戒，成为正式的沙弥。'
  },
  {
    name: '二坛比丘戒',
    active: false,
    description: '第二坛比丘戒的庄严传授，戒子们受持比丘二百五十戒，成为比丘僧。'
  },
  {
    name: '三坛菩萨戒',
    active: false,
    description: '第三坛菩萨戒的殊胜传授，戒子们受持菩萨戒，发菩提心，行菩萨道。'
  },
  {
    name: '圆满',
    active: false,
    description: '三坛大戒法会圆满结束，戒子们正式成为具足戒的僧人，功德圆满。'
  }
])

// 获取当前选中的步骤
const currentStep = computed(() => {
  return processSteps.value.find(step => step.active) || processSteps.value[0]
})

// 步骤标题的ref引用
const stepTitleRef = ref(null)

// 装饰线的动态样式
const decorativeLineStyle = ref({
  top: '4.5rem',
  bottom: '4rem'
})

// 计算装饰线位置的函数
const calculateLinePosition = async () => {
  await nextTick()
  if (stepTitleRef.value) {
    const titleElement = stepTitleRef.value
    const containerElement = titleElement.closest('.intro-container')
    const moreButton = containerElement?.querySelector('.more-button')

    if (containerElement && moreButton) {
      // 获取标题和按钮的位置信息
      const titleRect = titleElement.getBoundingClientRect()
      const buttonRect = moreButton.getBoundingClientRect()
      const containerRect = containerElement.getBoundingClientRect()

      // 计算相对于容器的位置
      const titleBottom = titleRect.bottom - containerRect.top
      const buttonTop = buttonRect.top - containerRect.top

      // 装饰线从标题底部开始，留0.5rem间距
      const spacing = 8 // 0.5rem = 8px (基准字体16px)
      const lineTop = titleBottom + spacing

      // 装饰线到按钮上方，留0.5rem间距
      const lineBottom = containerRect.height - (buttonTop - spacing)

      decorativeLineStyle.value = {
        top: `${lineTop}px`,
        bottom: `${lineBottom}px`
      }
    }
  }
}

// 点击切换步骤状态
const selectStep = (index) => {
  processSteps.value.forEach((step, i) => {
    step.active = i === index
  })
  // 切换步骤后重新计算装饰线位置
  calculateLinePosition()
}

// 组件挂载后计算装饰线位置
onMounted(() => {
  calculateLinePosition()
})

// 监听当前步骤变化，重新计算装饰线位置
watch(currentStep, () => {
  calculateLinePosition()
}, { deep: true })

// 查看更多按钮点击事件
const viewMore = () => {
  console.log('查看更多:', currentStep.value.name)
  // 这里可以添加跳转到详情页面的逻辑
}
</script>

<style scoped>
.home-container {
  position: relative;
  min-height: 100vh;
  width: 100%;
  overflow-x: hidden;
}

/* 左下角背景装饰图 - bg@2x.png */
.bottom-left-decoration {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 50%;
  height: 50%;
  background-image: url('@/assets/images/02 西园戒幢律寺三坛大戒法会/bg@2x.png');
  background-size: contain;
  background-position: bottom left;
  background-repeat: no-repeat;
  z-index: -1;
  pointer-events: none;
}

/* 主要内容区域 */
.main-content {
  position: relative;
  z-index: 1;
  width: 100%;
}

/* Banner区域 */
.banner-section {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.banner-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* 视频播放器区域 */
.video-section {
  width: 100%;
  margin: 0;
  padding: 0;
}

.video-section :deep(.video-player-container) {
  width: 100%;
  background: transparent;
}

.video-section :deep(.video-player) {
  width: 100%;
  height: auto;
}

/* 响应式设计 */
@media (max-width: 48rem) {
  .bottom-left-decoration {
    width: 60%;
    height: 40%;
  }
}

@media (max-width: 30rem) {
  .bottom-left-decoration {
    width: 70%;
    height: 35%;
  }
}

/* 法会流程容器 */
.ceremony-wrapper {
  position: relative;
  width: 100vw;
  min-height: 100vh;
  background-image: url('/src/assets/images/02 西园戒幢律寺三坛大戒法会/背景@2x.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  overflow: hidden;
}

/* 法会流程模块 */
.ceremony-process {
  width: 100%;
  padding: 2rem 1rem;
  position: relative;
  z-index: 2;
}

/* 标题部分 */
.ceremony-title {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 2rem;
}

.ceremony-title img {
  max-width: 12rem;
  height: auto;
}

/* 流程容器 */
.process-container {
  position: relative;
  width: 100%;
}

/* 麻绳背景 */
.rope-background {
  position: absolute;
  top: 10%;
  left: 0;
  right: 0;
  height: 0.3rem;
  background-image: url('@/assets/images/02 西园戒幢律寺三坛大戒法会/麻绳@2x.png');
  background-size: cover;
  background-position: top;
  background-repeat: repeat-x;
  transform: translateY(-10%);
  z-index: 1;
}

/* 流程步骤容器 */
.process-steps {
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  z-index: 2;
  padding: 0 0.5rem;
  gap: 0.5rem;
}

/* 单个流程步骤 */
.process-step {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.process-step:hover {
  transform: scale(1.05);
}

/* 步骤内容 */
.step-content {
  width: 4rem;
  height: 10rem;
  background: linear-gradient(180deg, #DAC39E 0%, #BE9C63 100%);
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: all 0.3s ease;
  box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.1);
}

/* 选中状态的步骤内容 */
.process-step.active .step-content {
  background: linear-gradient(180deg, #C8916C 0%, #975021 100%);
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.2);
}

/* 步骤文字 */
.step-text {
  color: white;
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  line-height: 1.3;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  text-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.3);
  margin-top: 0.85rem;
  /* 文字间隔 */
  letter-spacing: 0.05rem;
}

/* 顶部白色圆形占位 */
.top-circle {
  position: absolute;
  top: 0.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: 0.45rem;
  height: 0.45rem;
  background: white;
  border-radius: 50%;
  z-index: 3;
}

/* 底部箭头 */
.bottom-arrow {
  position: absolute;
  bottom: -1.25rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
}

.bottom-arrow img {
  width: 1rem;
  height: 1rem;
}

/* 响应式调整 */
@media (max-width: 48rem) {
  .ceremony-process {
    padding: 1.5rem 0.5rem;
  }

  .ceremony-title img {
    max-width: 10rem;
  }

  .step-content {
    width: 3rem;
    height: 8rem;
  }

  .step-text {
    font-size: 0.9rem;
  }

  .process-steps {
    padding: 0 0.25rem;
    gap: 0.25rem;
  }
}

@media (max-width: 30rem) {
  .ceremony-process {
    padding: 1rem 0.25rem;
  }

  .ceremony-title img {
    max-width: 8rem;
  }

  .step-content {
    width: 2.5rem;
    height: 6.5rem;
  }

  .step-text {
    font-size: 0.8rem;
  }

  .top-circle {
    width: 0.5rem;
    height: 0.5rem;
  }

  .bottom-arrow img {
    width: 1rem;
    height: 0.75rem;
  }

  .process-steps {
    gap: 0.125rem;
  }
}

/* 介绍容器样式 */
.ceremony-intro {
  display: flex;
  justify-content: center;
  align-items: center;
}

.intro-container {
  position: relative;
  width: 100%;
  margin: 1rem;
  border-radius: 1.17rem;
  border: 0.08rem solid #C1A16A;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.3s ease;
  aspect-ratio: 28.75 / 16.18;
}

.intro-container:hover {
  transform: translateY(-0.125rem);
  box-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.2);
}

/* 背景图片 */
.intro-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('/src/assets/images/02 西园戒幢律寺三坛大戒法会/截图/全家福3_副本.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0.8;
  z-index: 1;
}

.intro-background::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, rgba(152, 81, 34, 0.75) 0%, rgba(152, 81, 34, 0.45) 30%, rgba(65, 44, 12, 0.15) 70%, transparent 100%);
  z-index: 2;
}

/* 步骤标题 */
.step-title {
  position: absolute;
  top: 1.5rem;
  left: 1.5rem;
  z-index: 3;
}

.step-title-text {
  color: white;
  font-size: 2rem;
  font-weight: 700;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  text-shadow: 0 0.125rem 0.5rem rgba(0, 0, 0, 0.8);
  letter-spacing: 0.1rem;
  line-height: 1.2;
}

/* 装饰线 */
.decorative-line {
  position: absolute;
  left: 2.2rem;
  width: 0.125rem;
  border-left: 0.125rem dotted #C1A16A;
  z-index: 3;
}

/* 查看更多按钮 */
.more-button {
  position: absolute;
  bottom: 1.5rem;
  left: 1.5rem;
  height: 3rem;
  aspect-ratio: 3 / 1;
  background-image: url('/src/assets/images/02 西园戒幢律寺三坛大戒法会/button-bg@2x.png');
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 3;
  transition: all 0.3s ease;
}

.more-button:hover {
  transform: scale(1.05);
  filter: brightness(1.1);
}

.more-text {
  color: white;
  font-size: 0.875rem;
  font-weight: 600;
  text-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.5);
}

/* 步骤描述（隐藏，可用于后续扩展） */
.step-description {
  display: none;
}

/* 响应式设计 */
@media (max-width: 48rem) {
  .intro-container {
    padding: 0.875rem;
  }

  .step-title-text {
    font-size: 1.75rem;
  }

  .decorative-line {
    /* 响应式下的装饰线样式，位置由JavaScript动态计算 */
  }

  .more-button {
    height: 1.75rem;
  }

  .more-text {
    font-size: 0.75rem;
  }
}

@media (max-width: 30rem) {
  .intro-container {
    padding: 0.75rem;
  }

  .step-title {
    top: 1rem;
    left: 1rem;
  }

  .step-title-text {
    font-size: 1.5rem;
  }

  .decorative-line {
    left: 1.8rem;
    /* 小屏幕下的装饰线样式，位置由JavaScript动态计算 */
  }

  .more-button {
    bottom: 1rem;
    left: 1rem;
    height: 1.5rem;
  }

  .more-text {
    font-size: 0.7rem;
  }
}
</style>