<template>
  <div class="flex-1 overflow-hidden relative">
    <virtual-list :class="{ '!flex-col': overflow }" ref="vsl" class="my_scrollbar h-full overflow-y-auto"
      :data-key="'clientMsgID'" :data-sources="messageStore.storeHistoryMessageList" :topThreshold="120" :keeps="50"
      :data-component="(message: MessageItem) => checkIsNotification(message) ? SystemNotificationItem : MessageItemVue"
      :extra-props="{}" :estimate-size="80" @totop="onTotop" @resized="onItemRendered" @scroll="onScoll">
      <template #header>
        <div v-if="overflow && !initLoading" class="pt-2">
          <div class="spinner" v-show="loadState.loading"></div>
          <div class="finished" v-show="!messageStore.storeHistoryMessageHasMore">
            {{ $t("noMore") }}
          </div>
        </div>
      </template>
    </virtual-list>
    <div v-show="unReadCount && notScroll"
      class="flex items-center py-2 px-3 rounded-xl shadow-md absolute bottom-5 left-1/2 -translate-x-1/2 bg-white"
      @click="scrollToUnread">
      <img width="17" :src="arrow_icon" alt="">
      <span class="text-xs text-[#0089FF] ml-2">{{ $t('someNewMessage', { count: unReadCount }) }}</span>
    </div>
    <div v-show="initLoading" class="!absolute top-0 h-full w-full flex justify-center items-center bg-white">
      <van-loading type="spinner" />
    </div>
  </div>
</template>

<script setup lang='ts'>
import { TipTypes } from '@/constants/enum';
import useMessageStore from '@/store/modules/message';
import VirtualList from '@components/VirtualList';
import { useMessageReceipt } from '../useMessageReceipt'
import type { MessageItem } from 'open-im-sdk-wasm/lib/types/entity';
import useHistoryMessageList from '../useHistoryMessageList';
import MessageItemVue from './MessageItem/MessageItem.vue';
import SystemNotificationItem from './SystemNotificationItem.vue';
import { MessageType } from 'open-im-sdk-wasm';
import arrow_icon from '@assets/images/conversation/arrow.png'


const emit = defineEmits([]);
defineProps();

useMessageReceipt()
const messageStore = useMessageStore();

const cancelMultiple = () => { }

const historyMessageState = useHistoryMessageList({ cancelMultiple });
const {
  onItemRendered,
  onTotop,
  onScoll,
  scrollToUnread
} = historyMessageState;
const vsl = toRef(historyMessageState, "vsl");
const overflow = toRef(historyMessageState, "overflow");
const loadState = toRef(historyMessageState, "loadState");
const notScroll = toRef(historyMessageState, "notScroll");
const unReadCount = toRef(historyMessageState, "unReadCount");
const initLoading = toRef(
  historyMessageState,
  "initLoading"
);

const checkIsNotification = computed(() => (message: MessageItem) => {
  if (message.contentType === MessageType.GroupInfoUpdated) {
    let detail
    try {
      detail = JSON.parse(message.notificationElem?.detail!)
    } catch (e) {
    }
    return detail?.group?.notification === undefined
  }
  return TipTypes.includes(message.contentType)
})

</script>

<style lang='scss' scoped>
.finished {
  font-size: 14px;
  text-align: center;
  color: #bfbfbf;
}

.spinner {
  font-size: 10px;
  margin: 0px auto;
  text-indent: -9999em;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: #ffffff;
  background: linear-gradient(to right, #ccc 10%, rgba(255, 255, 255, 0) 42%);
  position: relative;
  animation: load3 1.4s infinite linear;
  transform: translateZ(0);
}

.spinner:before {
  width: 50%;
  height: 50%;
  background: #ccc;
  border-radius: 100% 0 0 0;
  position: absolute;
  top: 0;
  left: 0;
  content: '';
}

.spinner:after {
  background: #ffffff;
  width: 75%;
  height: 75%;
  border-radius: 50%;
  content: '';
  margin: auto;
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
}

@-webkit-keyframes load3 {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

@keyframes load3 {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

.group_announcement_tab {
  display: flex;
  position: absolute;
  top: 6px;
  z-index: 10;
  flex-direction: column;
  align-items: flex-start;
  width: 90%;
  left: 50%;
  transform: translateX(-50%);
  background-color: #F2F8FF;
  padding: 8px 12px;
  border-radius: 6px;
}
</style>