<template>
  <view class="notice-container" :style="{ padding: `0 ${gap}px` }">
    <view class="notice-wrapper">
      <view class="notice-icon">公告</view>
      <view class="notice-content">
        <swiper class="notice-swiper" vertical :circular="true" :autoplay="true" :interval="swiper * 1000" :duration="500" :display-multiple-items="1" @change="handleChange">
          <swiper-item v-for="(notice, index) in noticeList" :key="index" @click="handleNoticeClick(notice)">
            <view class="notice-item">{{ notice.text }}</view>
          </swiper-item>
        </swiper>
        <view class="notice-more">更多 ></view>
      </view>
    </view>
  </view>
</template>

<script setup>
import { ref, computed, onMounted, onUnmounted, watch } from 'vue';

// 定义props
const props = defineProps({
  noticeList: {
    type: Array,
    default: () => [],
    validator: (value) => {
      return value.every((item) => typeof item.text === 'string' && typeof item.url === 'string');
    },
  },
  gap: {
    type: Number,
    default: 0,
  },
  swiper: {
    type: Number,
    default: 3,
  },
});

// 响应式状态
const currentIndex = ref(0);
let timer = null;

// 计算循环列表
const displayList = computed(() => {
  return [props.noticeList[props.noticeList.length - 1], ...props.noticeList, props.noticeList[0]];
});

// 处理点击事件
const handleNoticeClick = (notice) => {
  if (notice.url) {
    // window.location.href = notice.url;
    uni.navigateTo({
      url: notice.url,
    });
  }
};

// 启动轮播
const startSwiper = () => {
  if (props.noticeList.length <= 1) return;

  // 设置初始位置
  currentIndex.value = 1;

  timer = setInterval(() => {
    const nextIndex = currentIndex.value + 1;
    if (nextIndex >= displayList.value.length - 1) {
      currentIndex.value = nextIndex;
      // 当到达最后一个元素时，等待过渡动画完成后重置到第一个元素
      setTimeout(() => {
        currentIndex.value = 1;
      }, 500);
    } else {
      currentIndex.value = nextIndex;
    }
  }, props.swiper * 1000);
};

// 监听列表变化
watch(
  () => props.noticeList.length,
  () => {
    if (timer) {
      clearInterval(timer);
    }
    startSwiper();
  }
);

// 组件挂载时启动轮播
onMounted(() => {
  startSwiper();
});

// 组件卸载时清理定时器
onUnmounted(() => {
  if (timer) {
    clearInterval(timer);
  }
});
</script>

<style lang="less" scoped>
.notice-container {
  margin: 4px 0;
  position: relative;
  .notice-wrapper {
    display: flex;
    align-items: center;
    height: 40px;
    background: #fff;
    border-radius: 130rpx 130rpx 130rpx 130rpx;
  }

  .notice-icon {
    width: 68rpx;
    height: 32rpx;
    color: #f89c33;
    font-size: 14px;
    border: 1px solid #f89c33;
    border-radius: 8rpx;
    text-align: center;
    line-height: 32rpx;
    margin: 0 10px;
  }

  .notice-content {
    flex: 1;
    height: 40px;
    overflow: hidden;
  }

  .notice-slider {
    height: 100%;
  }

  .notice-item {
    height: 40px;
    line-height: 40px;
    color: #333;
    font-size: 14px;
    cursor: pointer;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    width: 80%;
  }
  .notice-more {
    color: #999;
    position: absolute;
    right: 25px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 12px;
  }
}
</style>
