import { User, UserPageStatus } from "../entities/User";
import { DatabaseHelper } from "./DatabaseHelper";
import { AccountImageHelper } from "./AccountImageHelper";

/**
 * User helper
 * 
 * @author Pierre HUBERT
 */

const TABLE_NAME = "utilisateurs";

export class UserHelper {

	/**
	 * Get information a single user
	 * 
	 * @param id The ID of the user to get
	 * @returns Information about the user | null if not found
	 */
	public static async GetUserInfo(id: number) : Promise<User|null> {
		const result = await DatabaseHelper.QueryRow({
			table: TABLE_NAME,
			where: {
				ID: id
			}
		});

		if(!result)
			return null;
		
		return this.DbToUser(result);
	}

	/**
	 * Check out whether a user exists or not
	 * 
	 * @param id The ID of the user to check
	 */
	public static async Exists(id: number) : Promise<boolean> {
		return await DatabaseHelper.Count({
			table: TABLE_NAME,
			where: {
				ID: id
			}
		}) > 0;
	}

	/**
	 * Search for user in the database
	 * 
	 * @param query The query
	 * @param limit Limit for the request (default: 10)
	 * @returns The list of ids of the user
	 */
	public static async SearchUser(query: string, limit: number = 10) : Promise<Array<number>> {
		
		query = "%" + query.replace(/\ /g, "%") + "%";
		
		const request = await DatabaseHelper.Query({
			fields: ["ID"],
			table: TABLE_NAME,
			customWhere: "(nom LIKE ?) || (prenom LIKE ?) || (CONCAT(prenom, '%', nom) LIKE ?) || (CONCAT(nom, '%', prenom) LIKE ?)",
			customWhereArgs: [query, query, query, query],
			limit: limit,
		});

		return request.map((e) => e.ID);
	}


	private static async DbToUser(row: any) : Promise<User> {
		return new User({
			id: row.ID,
			firstName: row.prenom,
			lastName: row.nom,
			timeCreate: new Date(row.date_creation).getTime()/1000,
			virtualDirectory: row.sous_repertoire,
			pageStatus: row.pageouverte == 1 ? UserPageStatus.OPEN : (row.public == 1 ? UserPageStatus.PUBLIC : UserPageStatus.PRIVATE),
			accountImage: await AccountImageHelper.Get(row.ID)
		});
	}
}