<template>
    <div class="_eventList">
        <HeadlineTag value="监控列表" style="flex-shrink: 0;"></HeadlineTag>
        <div class="scroll-view" ref="scrollViewRef" v-if="resultData.length > 0" @mouseenter="onMouseenter" @mouseleave="onMouseleave">
            <div ref="listRef" class="list" v-for="(p, n) in count" :key="n">
                <div class="item" v-for="(item, index) in data" :key="index">
                    <div class="_eventList_mains_item_text view_item" style="width: 45%;">
                        <div :class="item.Id === 'on' ? '_success' : '_warning'"
                            class="_eventList_mains_item_text_flag"></div>
                        <el-text class="w-150px mb-2" truncated style="color: white;margin-left: 10px;">
                            {{ item.cameraName }}
                        </el-text>
                    </div>
                    <!-- <div style="justify-content: flex-start;width: 60px;"
                        :class="item.State == 0 ? 'blue_title' : 'red_title'">
                        {{ item.State == 0 ? '在线' : '离线' }}</div> -->
                    <div class="view_item">{{ item.cameraTypeName }}</div>
                </div>
            </div>
        </div>
        <Empty :bottom="true" v-else></Empty>
    </div>
</template>

<script setup>
import { ref, onMounted, onUnmounted } from "vue";
import HeadlineTag from '@/components/HeadlineTag'
import Empty from '@/components/Empty'
const props = defineProps({
    resultData: {
        type: Array,
        default: []
    }
})
const data = ref(); //列表数据
const listRef = ref(); //列表dom
const scrollViewRef = ref(); //滚动区域dom
const count = ref(1); //列表个数

let intervalId = null;
let isAutoScrolling = true; //是否自动滚动标识

//获取列表数据
const getData = () => {
    //模拟接口请求列表数据
    return new Promise((resolve, reject) => {
        setTimeout(() => {
            //生成10条数据
            let list = new Array(30).fill().map((item, index) => index);
            resolve(list);
        }, 100);
    });
};

watch(() => props.resultData, (newVal) => {
    if (newVal) {
        // data.value = await getData();
        data.value = newVal;
        intervalId && clearInterval(intervalId);
        nextTick(() => {
            //判断列表是否生成滚动条
            count.value = hasScrollBar() ? 2 : 1;
            //有滚动条开始自动滚动
            if (count.value == 2) {
                autoScrolling();
            }
        });
    }
}, { deep: true, immediate: true } // 开启深度监听
)
onMounted(() => {
})
//判断列表是否有滚动条
const hasScrollBar = () => {
    if (scrollViewRef.value) {
        return scrollViewRef.value.scrollHeight > scrollViewRef.value.clientHeight;
    }
};
//设置自动滚动
const autoScrolling = () => {
    intervalId = setInterval(() => {
        if (scrollViewRef.value.scrollTop < listRef.value[0].clientHeight) {
            scrollViewRef.value.scrollTop += isAutoScrolling ? 1 : 0;
        } else {
            scrollViewRef.value.scrollTop = 0;
        }
    }, 20);
};

onBeforeUnmount(() => {
    //离开页面清理定时器
    intervalId && clearInterval(intervalId);
});

//鼠标进入，停止滚动
const onMouseenter = () => {
    isAutoScrolling = false;
};
//鼠标移出，继续滚动
const onMouseleave = () => {
    isAutoScrolling = true;
};
</script>

<style lang="scss" scoped>
._success {
    background: #15acaa;
}

._warning {
    background: #FFC107;
}

._eventList {
    overflow: hidden;
    display: flex;
    flex-direction: column;

    &_mains {
        margin: 10px 30px;
        overflow: hidden; // 隐藏溢出内容
        // 鼠标移入时改变手势
        cursor: pointer;

        &_item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 0;

            &_text {
                display: flex;
                justify-content: space-between;
                align-items: center;

                &_flag {
                    width: 10px;
                    height: 10px;
                    border-radius: 50%;
                    margin-left: 10px;
                }

                &_p {
                    margin-left: 10px;
                }
            }

            &_btn {
                color: red;
                display: flex;
                font-size: 14px;
                gap: 20px;

                &_item {
                    border-radius: 5px;
                    cursor: pointer;
                }
            }
        }
    }
}

.header-view {
    margin-top: 10px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 10px 10px 20px;
    background-color: rgba(16, 40, 92, 1);
}

.view_item {
    // flex: 1;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
    width: 33%;
}

.warning-view {
    width: 100%;
    height: calc(100% - 51px);
    display: flex;
    flex-direction: column;
}

.label {
    color: #fff;
    padding: 20px;
    font-size: 22px;
}

.scroll-view {
    flex: 1;
    height: 0;
    width: 100%;
    overflow-y: auto;
}

.list {
    width: 100%;
    box-sizing: border-box;
}

.item {
    padding: 0px 10px 0px 20px;
    width: 100%;
    height: 50px;
    min-height: 50px;
    font-size: 15px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: #eee;
}

.item:nth-child(even) {
    background: rgba(16, 40, 92, 0.4);
}

.item:hover {
    cursor: pointer;
    background-image: linear-gradient(to right, #168cdb, transparent);
}

/*隐藏滚动条
 */
::-webkit-scrollbar {
    display: none;
}

.blue_title {
    color: #67C23A;
}

.red_title {
    color: #F56C6C;
}
</style>