<template>
  <div :class="{ show: show }" class="header-search">
    <svg-icon class-name="search-icon" icon-class="search" @click.stop="click" />
    <el-select
      ref="headerSearchSelectRef"
      v-model="search"
      :remote-method="querySearch"
      filterable
      default-first-option
      remote
      placeholder="Search"
      class="header-search-select"
      @change="change"
    >
      <el-option v-for="option in options" :key="option.item.path" :value="option.item" :label="option.item.title.join(' > ')" />
    </el-select>
  </div>
</template>

<script setup lang="ts" name="HeaderSearch">
import Fuse from 'fuse.js';
import { getNormalPath } from '@/utils/ruoyi';
import { isHttp } from '@/utils/validate';
import usePermissionStore from '@/store/modules/permission';
import { RouteRecordRaw } from 'vue-router';

type Router = Array<{
  path: string;
  title: string[];
}>;

const search = ref('');
const options = ref<any>([]);
const searchPool = ref<Router>([]);
const show = ref(false);
const fuse = ref();
const headerSearchSelectRef = ref<ElSelectInstance>();
const router = useRouter();
const routes = computed(() => usePermissionStore().getRoutes());

const click = () => {
  show.value = !show.value;
  if (show.value) {
    headerSearchSelectRef.value && headerSearchSelectRef.value.focus();
  }
};
const close = () => {
  headerSearchSelectRef.value && headerSearchSelectRef.value.blur();
  options.value = [];
  show.value = false;
};
const change = (val: any) => {
  const path = val.path;
  const query = val.query;
  if (isHttp(path)) {
    // http(s):// 路径新窗口打开
    const pindex = path.indexOf('http');
    window.open(path.substr(pindex, path.length), '_blank');
  } else {
    if (query) {
      router.push({ path: path, query: JSON.parse(query) });
    } else {
      router.push(path);
    }
  }
  search.value = '';
  options.value = [];
  nextTick(() => {
    show.value = false;
  });
};
const initFuse = (list: Router) => {
  fuse.value = new Fuse(list, {
    shouldSort: true,
    threshold: 0.4,
    location: 0,
    distance: 100,
    minMatchCharLength: 1,
    keys: [
      {
        name: 'title',
        weight: 0.7
      },
      {
        name: 'path',
        weight: 0.3
      }
    ]
  });
};
// Filter out the routes that can be displayed in the sidebar
// And generate the internationalized title
const generateRoutes = (routes: RouteRecordRaw[], basePath = '', prefixTitle: string[] = []) => {
  let res: Router = [];
  routes.forEach((r) => {
    // skip hidden router
    if (!r.hidden) {
      const p = r.path.length > 0 && r.path[0] === '/' ? r.path : '/' + r.path;
      const data = {
        path: !isHttp(r.path) ? getNormalPath(basePath + p) : r.path,
        title: [...prefixTitle],
        query: ''
      };
      if (r.meta && r.meta.title) {
        data.title = [...data.title, r.meta.title];
        if (r.redirect !== 'noRedirect') {
          // only push the routes with title
          // special case: need to exclude parent router without redirect
          res.push(data);
        }
      }

      if (r.query) {
        data.query = r.query;
      }

      // recursive child routes
      if (r.children) {
        const tempRoutes = generateRoutes(r.children, data.path, data.title);
        if (tempRoutes.length >= 1) {
          res = [...res, ...tempRoutes];
        }
      }
    }
  });
  return res;
};
const querySearch = (query: string) => {
  if (query !== '') {
    options.value = fuse.value.search(query);
  } else {
    options.value = [];
  }
};

onMounted(() => {
  searchPool.value = generateRoutes(routes.value);
});

// watchEffect(() => {
//     searchPool.value = generateRoutes(routes.value)
// })

watch(show, (value) => {
  if (value) {
    document.body.addEventListener('click', close);
  } else {
    document.body.removeEventListener('click', close);
  }
});

watch(searchPool, (list: Router) => {
  initFuse(list);
});
</script>

<style lang="scss" scoped>
.header-search {
  font-size: 0 !important;

  .search-icon {
    cursor: pointer;
    font-size: 18px;
    vertical-align: middle;
  }

  .header-search-select {
    font-size: 18px;
    transition: width 0.2s;
    width: 0;
    overflow: hidden;
    background: transparent;
    border-radius: 0;
    display: inline-block;
    vertical-align: middle;

    :deep(.el-input__inner) {
      border-radius: 0;
      border: 0;
      padding-left: 0;
      padding-right: 0;
      box-shadow: none !important;
      border-bottom: 1px solid #d9d9d9;
      vertical-align: middle;
    }
  }

  &.show {
    .header-search-select {
      width: 210px;
      margin-left: 10px;
    }
  }
}
</style>
