namespace _aum.service.admin
{
	
	/**
	 */
	export type type_value = {
		name : string;
		password_image : string;
	};
	
	
	/**
	 */
	function get(
		name : string
	) : (null | type_value)
	{
		const admins : Array<{name : string; password_image : string;}> = _aum.conf.get().admins;
		const entry : (undefined | {name : string; password_image : string;}) = admins.find(entry_ => (entry_.name === name));
		return (
			(entry === undefined)
			? null
			: {
				"name": entry.name,
				"password_image": entry.password_image,
			}
		);
	}
	
	
	/**
	 */
	async function check_password(
		value : type_value,
		password_given : string
	) : Promise<boolean>
	{
		return _aum.helpers.bcrypt_compare(value.password_image, password_given);
	}
	
	
	/**
	 */
	export async function login(
		name : string,
		password : string
	) : Promise<(null | type_value)>
	{
		const value : (null | type_value) = get(name);
		if (value === null) {
			return null;
		}
		else {
			if (! (await check_password(value, password))) {
				return null;
			}
			else {
				return value;
			}
		}
	}
	
}