angular.module('fbMocks')
    .factory('uniqueIdService', [function (
        ): fb.IMockUniqueIdService {
        'use strict';
        var ids: { [str: string]: number[] } = {};
        var idsNoLimit: { [str: string]: number } = {};
        var occupieds: { [str: string]: boolean } = {};

        var getUniqueId = function (prefix: string): string {
            if (!ids[prefix]) {
                ids[prefix] = [];
                for (var i: number = 0; i < 1000; i++) {
                    ids[prefix].push(i);
                }
            }
            for (var j: number = 0; j < 1000; j++) {
                if (!occupieds[prefix + j]) {
                    occupieds[prefix + j] = true;
                    return prefix + j;
                }
            }
            return '';
        };
        var getUniqueIdNoLimit = function (prefix: string): string {
            if (angular.isUndefined(idsNoLimit[prefix])) {
                idsNoLimit[prefix] = -1;
            }
            idsNoLimit[prefix] = idsNoLimit[prefix] + 1;

            return prefix + idsNoLimit[prefix];
        };

        var removeUniqueId = function (id: string): void {
            delete occupieds[id];
        };

        var isUsed = function (identifier: string): boolean {
            return occupieds[identifier];
        };

        return {
            isUsed: isUsed,
            getUniqueId: getUniqueId,
            getUniqueIdNoLimit: getUniqueIdNoLimit,
            removeUniqueId: removeUniqueId
        };
    }]);