import { useRoute } from 'vue-router'
import { sessionCache } from '@/store'
import { AuthMenu } from './interface'

export function useMenu() {
    const route = useRoute();
    const menus = sessionCache.getValue('menus');

    /**
     * 通过code获取对应的子菜单
     * @param routeName 
     * @returns 
     */
    const getChildrenMenu = (routeName?: string) => {
        const filter = (items: Ermcp.AccountMenu[], name?: string) => {
            let result: Ermcp.AccountMenu[] = [];
            if (name) {
                for (let i = 0; i < items.length; i++) {
                    const { code, children } = items[i];
                    if (code === name) return children ?? result;
                    if (children) {
                        result = filter(children, name)
                        if (result.length) return result;
                    }
                }
            }
            return result;
        }
        return filter(menus, routeName ?? route.name?.toString());
    }

    /**
     * 获取权限菜单
     * @returns 
     */
    const getAuthMenu = () => {
        const filter = (menu: Ermcp.AccountMenu) => ({
            path: menu.path,
            name: menu.code,
            label: menu.title,
            icon: menu.icon,
        })

        return menus.map((menu) => {
            const result: AuthMenu = filter(menu);
            if (menu.children) {
                result.children = menu.children.map((child) => filter(child));
            }
            return result;
        })
    }

    /**
     * 获取当前页面操作权限
     * @param filtered 过滤的数据项
     * @param reverse 是否反向过滤
     * @returns 
     */
    const getAuth = (filtered: string[] = [], reverse = false) => {
        const result = route.meta.auth as Ermcp.AccountMenu.Auth[];
        if (filtered.length) {
            if (reverse) {
                // 返回除指定的权限代码
                return result.filter((e) => !filtered.includes(e.code));
            } else {
                // 返回指定的权限代码
                return result.filter((e) => filtered.includes(e.code));
            }
        }
        return result;
    }

    return {
        menus,
        getChildrenMenu,
        getAuth,
        getAuthMenu,
    }
}