import { GroupEntry } from '../models/groupEntry';
import { UserEntry } from '../models/userEntry';

export abstract class BaseDirectoryService {
    protected createDirectoryQuery(filter: string) {
        if (filter == null || filter === '') {
            return null;
        }

        const mainParts = filter.split('|');
        if (mainParts.length < 2 || mainParts[1] == null || mainParts[1].trim() === '') {
            return null;
        }

        return mainParts[1].trim();
    }

    protected createCustomSet(filter: string): [boolean, Set<string>] {
        if (filter == null || filter === '') {
            return null;
        }

        const mainParts = filter.split('|');
        if (mainParts.length < 1 || mainParts[0] == null || mainParts[0].trim() === '') {
            return null;
        }

        const parts = mainParts[0].split(':');
        if (parts.length !== 2) {
            return null;
        }

        const keyword = parts[0].trim().toLowerCase();
        let exclude = true;
        if (keyword === 'include') {
            exclude = false;
        } else if (keyword === 'exclude') {
            exclude = true;
        } else {
            return null;
        }

        const set = new Set<string>();
        const pieces = parts[1].split(',');
        for (const p of pieces) {
            set.add(p.trim().toLowerCase());
        }

        return [exclude, set];
    }

    protected filterOutResult(setFilter: [boolean, Set<string>], result: string) {
        if (setFilter != null) {
            const cleanResult = result != null ? result.trim().toLowerCase() : '--';
            const excluded = setFilter[0];
            const set = setFilter[1];

            if (excluded && set.has(cleanResult)) {
                return true;
            } else if (!excluded && !set.has(cleanResult)) {
                return true;
            }
        }

        return false;
    }

    protected filterUsersFromGroupsSet(users: UserEntry[], groups: GroupEntry[],
        setFilter: [boolean, Set<string>]): UserEntry[] {
        if (setFilter == null || users == null) {
            return users;
        }

        return users.filter((u) => {
            if (u.disabled || u.deleted) {
                return true;
            }

            return groups.filter((g) => g.userMemberExternalIds.has(u.externalId)).length > 0;
        });
    }

    protected forceGroup(force: boolean, users: UserEntry[]): boolean {
        return force || (users != null && users.filter((u) => !u.deleted && !u.disabled).length > 0);
    }
}