/**
 * @ngdoc fbPersonnummerSpec 
 * @name fasit.directiveTest.#fbPersonnummerSpec
 * @fbPersonnummerSpec
 *
 * @description
 * Directive som validerar input för att se om inputen innehåller ett giltigt personnummer eller inte
 *
 */
angular.module('fasit')
    .directive('fbPersonnummer', [function () {
        var link = function (
            scope: fb.IFbPersonnummerScope,
            elm: fb.IRootElementService,
            attrs: ng.IAttributes,
            ctrl: ng.INgModelController
            ) {
            scope.valideraPersonnummer = function (value: string): boolean {
                var nonNumbers = new RegExp('[^0-9]');
                if (nonNumbers.test(value)) {
                    return false;
                }
                if (value.length !== 12) {
                    return false;
                }

                var aar: number = parseInt(value.substring(0, 4));
                var maanad: number = parseInt(value.substring(4, 6));
                var dag: number = parseInt(value.substring(6, 8));
                var max_aar: number = new Date().getFullYear();
                // kontrollera år och månad
                if (1900 > aar || aar > max_aar ||
                    1 > maanad || maanad > 12) {
                    return false;
                }
                // kontrollera dag
                var dagarPerMaanad: number[] = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
                if (aar % 400 === 0 || (aar % 100 !== 0 && aar % 4 === 0)) {
                    dagarPerMaanad[1] = 29;
                }
                if (1 > dag || dag > dagarPerMaanad[maanad - 1]) {
                    return false;
                }

                // Beräkna och kontrollera kontroll-siffran
                var controlValidation = [0, 0, 2, 1, 2, 1, 2, 1, 2, 1, 2];
                var sum: number = 0;
                for (var i: number = 0; i < controlValidation.length; i++) {
                    var str: string = '' + controlValidation[i] * parseInt(value.charAt(i));
                    if (str.length === 1) {
                        sum += parseInt(str);
                    } else {
                        sum += parseInt(str.charAt(0));
                        sum += parseInt(str.charAt(1));
                    }
                }
                var num = (10 - (sum % 10)) % 10;
                if (num !== parseInt(value.charAt(11))) {
                    return false;
                }

                return true;
            };

            ctrl.$parsers.unshift(function (viewValue) {
                if (scope.valideraPersonnummer(viewValue)) {
                    // it is valid
                    ctrl.$setValidity('personnummer', true);
                    return viewValue;
                } else {
                    // it is invalid, return undefined (no model update)
                    ctrl.$setValidity('personnummer', false);
                    return undefined;
                }
            });
        }

        return {
            restrict: 'A',
            require: 'ngModel',
            link: link
        };
    }]);