<template>
  <div class="flex px-2 py-1.5 items-center basic-tree-header">
    <slot name="headerTitle" v-if="$slots.headerTitle"></slot>
    <BasicTitle :helpMessage="helpMessage" v-if="!$slots.headerTitle && title">
      {{ title }}
    </BasicTitle>

    <div class="flex flex-1 justify-end items-center cursor-pointer" v-if="search || toolbar">
      <div class="mr-1 w-2/3" v-if="search">
        <InputSearch
          :placeholder="t('common.searchText')"
          size="small"
          allowClear
          @change="handleSearch"
        />
      </div>
      <Dropdown @click.prevent v-if="toolbar">
        <Icon icon="ion:ellipsis-vertical" />
        <template #overlay>
          <Menu @click="handleMenuClick">
            <template v-for="item in toolbarList" :key="item.value">
              <MenuItem v-bind="{ key: item.value }">
                {{ item.label }}
              </MenuItem>
              <MenuDivider v-if="item.divider" />
            </template>
          </Menu>
        </template>
      </Dropdown>
    </div>
  </div>
</template>
<script lang="ts">
  import type { PropType } from 'vue';
  import { defineComponent, computed } from 'vue';

  import { Dropdown, Menu, Input } from 'ant-design-vue';
  import { Icon } from '/@/components/Icon';
  import { BasicTitle } from '/@/components/Basic';

  import { propTypes } from '/@/utils/propTypes';

  import { useI18n } from '/@/hooks/web/useI18n';
  import { useDebounceFn } from '@vueuse/core';

  enum ToolbarEnum {
    SELECT_ALL,
    UN_SELECT_ALL,
    EXPAND_ALL,
    UN_EXPAND_ALL,
    CHECK_STRICTLY,
    CHECK_UN_STRICTLY,
  }

  interface MenuInfo {
    key: ToolbarEnum;
  }
  export default defineComponent({
    name: 'BasicTreeHeader',
    components: {
      BasicTitle,
      Icon,
      Dropdown,
      Menu,
      MenuItem: Menu.Item,
      MenuDivider: Menu.Divider,
      InputSearch: Input.Search,
    },
    props: {
      helpMessage: {
        type: [String, Array] as PropType<string | string[]>,
        default: '',
      },
      title: propTypes.string,
      toolbar: propTypes.bool,
      checkable: propTypes.bool,
      search: propTypes.bool,
      checkAll: propTypes.func,
      expandAll: propTypes.func,
    },
    emits: ['strictly-change', 'search'],
    setup(props, { emit }) {
      const { t } = useI18n();

      const toolbarList = computed(() => {
        const { checkable } = props;
        const defaultToolbarList = [
          { label: t('component.tree.expandAll'), value: ToolbarEnum.EXPAND_ALL },
          {
            label: t('component.tree.unExpandAll'),
            value: ToolbarEnum.UN_EXPAND_ALL,
            divider: checkable,
          },
        ];

        return checkable
          ? [
              { label: t('component.tree.selectAll'), value: ToolbarEnum.SELECT_ALL },
              {
                label: t('component.tree.unSelectAll'),
                value: ToolbarEnum.UN_SELECT_ALL,
                divider: checkable,
              },
              ...defaultToolbarList,
              { label: t('component.tree.checkStrictly'), value: ToolbarEnum.CHECK_STRICTLY },
              { label: t('component.tree.checkUnStrictly'), value: ToolbarEnum.CHECK_UN_STRICTLY },
            ]
          : defaultToolbarList;
      });

      function handleMenuClick(e: MenuInfo) {
        const { key } = e;
        switch (key) {
          case ToolbarEnum.SELECT_ALL:
            props.checkAll?.(true);
            break;
          case ToolbarEnum.UN_SELECT_ALL:
            props.checkAll?.(false);
            break;
          case ToolbarEnum.EXPAND_ALL:
            props.expandAll?.(true);
            break;
          case ToolbarEnum.UN_EXPAND_ALL:
            props.expandAll?.(false);
            break;
          case ToolbarEnum.CHECK_STRICTLY:
            emit('strictly-change', false);
            break;
          case ToolbarEnum.CHECK_UN_STRICTLY:
            emit('strictly-change', true);
            break;
        }
      }

      function emitChange(value?: string): void {
        emit('search', value);
      }
      const debounceEmitChange = useDebounceFn(emitChange, 200);

      function handleSearch(e: ChangeEvent): void {
        debounceEmitChange(e.target.value);
      }

      return { t, toolbarList, handleMenuClick, handleSearch };
    },
  });
</script>
<style lang="less" scoped>
  .basic-tree-header {
    border-bottom: 1px solid @border-color-base;
  }
</style>
