<template>
  <div class="postList-component">
    <img
      src="@/assets/images/groupEvolution/event-list-title.png"
      alt=""
      style="margin-top: -17px; margin-left: -11px"
    />
    <div
      class="post-list-wrapper"
      ref="listRef"
      @mouseenter="pauseScroll"
      @mouseleave="resumeScroll"
    >
      <div class="scrolling-content">
        <div
          class="post-item"
          v-for="(post, index) in posts"
          :key="index"
          :class="{ highlighted: post.highlighted }"
          @click="handleLeaderPost(post)"
        >
          <span class="timestamp">{{ post.timestamp }}</span>
          <span class="author">【{{ post.author }}】发布了帖文</span>
          <div class="influence-section">
            <div class="influence-label">互动: {{ post.influence }}</div>
            <div class="influence-bar">
              <div class="bar-track"></div>
              <div class="bar-fill" :style="{ width: getInfluenceWidth(post.influence) }"></div>
              <div class="bar-handle-wrapper" :style="{ left: getInfluenceWidth(post.influence) }">
                <div class="bar-handle"></div>
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script setup>
import { ref, computed, defineProps, defineEmits, onMounted, onBeforeUnmount } from "vue"
const props = defineProps({
  posts: {
    type: Array,
    default: () => []
  }
})

const emit = defineEmits(["click:openDialog"])
const animationDuration = computed(() => `${props.posts.length * 3}s`)

const maxInfluence = 10000

const getInfluenceWidth = (influence) => {
  const percentage = (influence / maxInfluence) * 100
  return `${Math.min(percentage, 100)}%`
}
const handleLeaderPost = (item) => {
  emit("click:openDialog", item)
  console.log(item)
}

const listRef = ref(null)
let scrollTimer = null
let direction = 1 // 1: 向下, -1: 向上
const scrollStep = 1 // 每步像素
const scrollInterval = 80 // 每40ms滚动一次，越大越慢

function startScroll() {
  if (scrollTimer) return
  scrollTimer = setInterval(() => {
    const el = listRef.value
    if (!el) return
    el.scrollTop += direction * scrollStep
    // 到底部
    if (el.scrollTop + el.clientHeight >= el.scrollHeight) {
      direction = -1
    }
    // 到顶部
    if (el.scrollTop <= 0) {
      direction = 1
    }
  }, scrollInterval)
}

function pauseScroll() {
  if (scrollTimer) {
    clearInterval(scrollTimer)
    scrollTimer = null
  }
}
function resumeScroll() {
  startScroll()
}

onMounted(() => {
  startScroll()
})
onBeforeUnmount(() => {
  pauseScroll()
})
</script>

<style scoped lang="less">
.postList-component {
  width: 100%;
  height: 100%;
  .post-list-wrapper {
    width: 100%;
    height: 80%;
    overflow: auto;
  }
  /* 滚动条整体样式 - WebKit浏览器 */
  .post-list-wrapper::-webkit-scrollbar {
    width: 3px; /* 垂直滚动条宽度 */
    height: 5px; /* 水平滚动条高度 */
  }

  /* 滚动条滑块 */
  .post-list-wrapper::-webkit-scrollbar-thumb {
    background: rgba(147, 210, 255, 0.3); /* 蓝色半透明滑块 */
    border-radius: 4px;
  }

  /* 鼠标悬停在滑块上的效果 */
  .post-list-wrapper::-webkit-scrollbar-thumb:hover {
    background: rgba(147, 210, 255, 0.5); /* 更明显的蓝色 */
  }
  .scrolling-content {
    display: flex;
    flex-direction: column;
    gap: 1px;
    animation-name: scroll-up;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
  }

  .post-list-wrapper:hover .scrolling-content {
    animation-play-state: paused;
  }

  .post-item {
    display: flex;
    align-items: center;
    height: 36px;
    padding: 0 16px;
    background: linear-gradient(90deg, rgba(63, 169, 245, 0.16) 0%, rgba(0, 84, 187, 0) 100%);
    border-left: 2px solid #3fa9f5;
    color: white;
    font-size: 14px;
    gap: 12px;
    flex-shrink: 0;
    cursor: pointer;
    margin: 8px 0;
  }

  .post-item.highlighted {
    background: linear-gradient(90deg, rgba(63, 169, 245, 0.4) 0%, rgba(0, 84, 187, 0) 100%);
  }

  .post-type {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
  }

  .post-type-text {
    color: #8efbff;
    font-size: 14px;
    font-weight: 400;
    text-shadow: 0px 1px 1px rgba(0, 0, 0, 0.25);
  }

  .timestamp {
    flex-shrink: 0;
  }

  .author {
    flex-grow: 1;
    text-align: left;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .influence-section {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
  }
  .influence-label {
    width: 90px;
    display: flex;
    justify-content: flex-start;
  }
  .influence-bar {
    width: 200px;
    height: 10px;
    position: relative;
    display: flex;
    align-items: center;
  }

  .bar-track {
    width: 100%;
    height: 2px;
    background-color: rgba(208, 222, 238, 0.1);
    position: absolute;
  }

  .bar-fill {
    position: absolute;
    height: 2px;
    background: linear-gradient(270deg, #00f3ff 0%, #00527d 100%);
  }

  .bar-handle-wrapper {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    height: 16px;
    width: 16px;
    display: flex;
    justify-content: center;
    align-items: center;
  }

  .bar-handle {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: #e0f1ff;
    position: relative;
    box-shadow: 0 0 6px 0 rgba(13, 97, 255, 0.8);
  }

  .bar-handle::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 1px solid rgba(21, 154, 255, 0.3);
  }
}
</style>
