<template>
    <div class="el-menu-horizontal-warp">
        <el-scrollbar @wheel.prevent="onElMenuHorizontalScroll" ref="elMenuHorizontalScrollRef">
            <el-menu router :default-active="state.defaultActive" background-color="transparent" mode="horizontal"
                @select="onHorizontalSelect">
                <template v-for="val in menuLists">
                    <el-submenu :index="val.path" v-if="val.children && val.children.length > 0" :key="val.path">
                        <template #title>
                            <i :class="val.meta.icon ? val.meta.icon : ''"></i>
                            <span>{{ val.meta.title }}</span>
                        </template>
                        <SubItem :chil="val.children" />
                    </el-submenu>
                    <el-menu-item :index="val.path" :key="val?.path" v-else>
                        <template #title v-if="!val.meta.link || (val.meta.link && val.meta.isIframe)">
                            <i :class="val.meta.icon ? val.meta.icon : ''"></i>
                            {{ val.meta.title }}
                        </template>
                        <template #title v-else>
                            <a :href="val.meta.link" target="_blank">
                                <i :class="val.meta.icon ? val.meta.icon : ''"></i>
                                {{ val.meta.title }}
                            </a>
                        </template>
                    </el-menu-item>
                </template>
            </el-menu>
        </el-scrollbar>
    </div>
</template>

<script lang="ts" setup name="navMenuHorizontal">
import { reactive, computed, getCurrentInstance, onMounted, nextTick } from 'vue';
import { useRoute, onBeforeRouteUpdate } from 'vue-router';
import SubItem from '@/views/layout/navMenu/subItem.vue';
import { useRoutesList } from '@/store/routesList';
import { useThemeConfig } from '@/store/themeConfig';
import mittBus from '@/common/utils/mitt';

// 定义父组件传过来的值
const props = defineProps({
    // 菜单列表
    menuList: {
        type: Array<any>,
        default: () => [],
    },
});

const { proxy } = getCurrentInstance() as any;
const route = useRoute();
const state: any = reactive({
    defaultActive: null,
});
// 获取父级菜单数据
const menuLists = computed(() => {
    return props.menuList;
});
// 设置横向滚动条可以鼠标滚轮滚动
const onElMenuHorizontalScroll = (e: any) => {
    const eventDelta = e.wheelDelta || -e.deltaY * 40;
    proxy.$refs.elMenuHorizontalScrollRef.$refs.wrap.scrollLeft =
        proxy.$refs.elMenuHorizontalScrollRef.$refs.wrap.scrollLeft + eventDelta / 4;
};
// 初始化数据，页面刷新时，滚动条滚动到对应位置
const initElMenuOffsetLeft = () => {
    nextTick(() => {
        let els: any = document.querySelector('.el-menu.el-menu--horizontal li.is-active');
        if (!els) return false;
        proxy.$refs.elMenuHorizontalScrollRef.$refs.wrap.scrollLeft = els.offsetLeft;
    });
};
// 设置页面当前路由高亮
const setCurrentRouterHighlight = (path: string) => {
    const currentPathSplit = path.split('/');
    if (useThemeConfig().themeConfig.layout === 'classic') {
        state.defaultActive = `/${currentPathSplit[1]}`;
    } else {
        state.defaultActive = path;
    }
};
// 路由过滤递归函数
const filterRoutesFun = (arr: Array<object>) => {
    return arr
        .filter((item: any) => !item.meta.isHide)
        .map((item: any) => {
            item = Object.assign({}, item);
            if (item.children) item.children = filterRoutesFun(item.children);
            return item;
        });
};
// 传送当前子级数据到菜单中
const setSendClassicChildren = (path: string) => {
    const currentPathSplit = path.split('/');
    let currentData: any = {};
    filterRoutesFun(useRoutesList().routesList).map((v, k) => {
        if (v.path === `/${currentPathSplit[1]}`) {
            v['k'] = k;
            currentData['item'] = [{ ...v }];
            currentData['children'] = [{ ...v }];
            if (v.children) currentData['children'] = v.children;
        }
    });
    return currentData;
};
// 菜单激活回调
const onHorizontalSelect = (path: string) => {
    mittBus.emit('setSendClassicChildren', setSendClassicChildren(path));
};
// 页面加载时
onMounted(() => {
    initElMenuOffsetLeft();
    setCurrentRouterHighlight(route.path);
});
// 路由更新时
onBeforeRouteUpdate((to) => {
    setCurrentRouterHighlight(to.path);
    mittBus.emit('onMenuClick');
});
</script>

<style scoped lang="scss">
.el-menu-horizontal-warp {
    flex: 1;
    overflow: hidden;
    margin-right: 30px;

    ::v-deep(.el-scrollbar__bar.is-vertical) {
        display: none;
    }

    ::v-deep(a) {
        width: 100%;
    }

    .el-menu.el-menu--horizontal {
        display: flex;
        height: 100%;
        width: 100%;
        box-sizing: border-box;
    }
}
</style>
