<template>
  <view class="page">
	  <view class="status_bar"></view>
    <!-- 固定导航栏 -->
    <uni-nav-bar
      left-icon="left"
      title="通知公告"
      background-color="#F9F9F9"
      @clickLeft="narBack"
    />

    <!-- 滚动区域 -->
    <scroll-view
      scroll-y
      class="scroll-box"
      :refresher-enabled="true"
      :refresher-triggered="refreshing"
      @refresherrefresh="onRefresh"
      @scrolltolower="loadMore"
    >
      <view class="list-wrap">
        <!-- 下拉刷新 -->
        <view class="refresh" v-if="refreshing">
          <uni-icons type="spinner-cycle" class="spin"/> 刷新中...
        </view>

        <!-- 列表 -->
        <view
          v-for="notice in noticeList"
          :key="notice.noticeId"
          class="item">
          <view class="title-box">
            <view class="title">{{ notice.noticeTitle }}</view>
            <view class="dot" v-if="notice.readStatus === '0'"></view>
          </view>
          <view class="info">{{ notice.author }} · {{ notice.publishTime }}</view>
          <view class="content">{{ notice.noticeContent }}</view>
          <view class="detail" @click="goToDetail(notice)">
            <text style="color:#2F77FD;font-size: 24rpx;">详情</text>
            <uni-icons type="right" size="13" color="#007AFF"/>
          </view>
        </view>

        <!-- 加载中 / 无更多 / 空布局 -->
        <view class="load-more" v-if="loadingMore">加载中...</view>
        <view class="no-more" v-if="noMoreData && noticeList.length">没有更多通知了</view>
        <view class="empty" v-if="noticeList.length === 0 && !loading">
          暂无通知
        </view>
      </view>
    </scroll-view>
  </view>
</template>

<script setup>
import { ref } from 'vue'
import { onLoad ,onShow,onUnload} from '@dcloudio/uni-app'
import { getNoticeList } from '../api/api.js'

const noticeList = ref([])
const refreshing = ref(false)
const loadingMore = ref(false)
const noMoreData = ref(false)
const loading = ref(false)
const pageNum = ref(1)
const pageSize = 10
const isFirstShow = ref(true) // 详情返回列表刷新状态

const goToDetail = (notice) => {
  uni.navigateTo({
    url: `/pageSubPack/notice-list/noticeListDetails?id=${notice.noticeId}`
  })
}

const loadNotices = async (isRefresh = false) => {
  if (loading.value) return
  loading.value = true
  if (isRefresh) {
    pageNum.value = 1
    noMoreData.value = false
  }
  try {
    const res = await getNoticeList({ pageNum: pageNum.value, pageSize })
    if (res.code === 200) {
      const list = res.data.rows || []
      noticeList.value = isRefresh ? list : [...noticeList.value, ...list]
      if (list.length < pageSize) noMoreData.value = true
    }
  } catch (e) {}
  finally {
    loading.value = false
    refreshing.value = false
    loadingMore.value = false
  }
}
  // 更新单条已读状态
  const updateReadStatus = ({ noticeId, readStatus }) => {
      const item = noticeList.value.find(n => String(n.noticeId) === noticeId)
      if (item) {
          item.readStatus = readStatus
      }
  }
  
onShow(() =>{
	if(isFirstShow.value) return
	loadNotices(true)
})

const onRefresh = () => {
  refreshing.value = true
  loadNotices(true)
}

const loadMore = () => {
  if (noMoreData.value || loadingMore.value) return
  loadingMore.value = true
  pageNum.value++
  loadNotices()
}

const narBack = () => {
  const page = uni.getStorageSync('sourcePage')
  if (page === 'index') uni.switchTab({ url: '/pages/index/index' })
  if (page === 'serviceIndex') uni.switchTab({ url: '/pages/serviceIndex/serviceIndex' })
  uni.removeStorageSync('sourcePage')
}

onLoad(() => {
	isFirstShow.value = false
	uni.$on('noticeRead',updateReadStatus)
  loadNotices(true)
})
onUnload(()=>{
	uni.$off('noticeRead',updateReadStatus)
})
</script>

<style lang="scss">
page {
  background: #f9f9f9;
}
.page {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
}
.status_bar {
	height: 46px;
	width: 100%;
}
.scroll-box {
  flex: 1;
  height: 0; /* 让滚动区域生效 */
}
.list-wrap {
  padding: 40rpx;
}
.item {
  background: #fff;
  border-radius: 12rpx;
  padding: 30rpx;
  margin-bottom: 20rpx;
}
.title-box {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.title {
  font-size: 32rpx;
  font-weight: bold;
  width: 500rpx;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.dot {
  width: 16rpx;
  height: 16rpx;
  background: red;
  border-radius: 50%;
}
.info {
  color: #999;
  font-size: 24rpx;
  margin: 10rpx 0;
}
.content {
  color: #222;
  font-size: 24rpx;
  line-height: 1.5;
  margin: 20rpx 0;
  background-color: #f9f9f9;
  padding: 24rpx;
}
.detail {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.refresh, .load-more, .no-more {
  text-align: center;
  padding: 20rpx;
  color: #999;
  font-size: 24rpx;
}
.empty {
  text-align: center;
  padding: 100rpx 0;
  color: #999;
}
.refresh-btn {
  background: #007AFF;
  color: #fff;
  border-radius: 50rpx;
  padding: 10rpx 30rpx;
  margin-top: 20rpx;
}
.spin {
  animation: rotate 1s linear infinite;
}
@keyframes rotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}
</style>