'use strict';

/**
 * Licensed Materials - Property of IBM
 * IBM Cognos Products: BI Cloud (C) Copyright IBM Corp. 2017
 * US Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
 */
define(['underscore', '../../app/nls/StringResources', '../../lib/@waca/core-client/js/core-client/utils/Lexicon'], function (_, DashboardStringResources, Lexicon) {

	var _stringService = {

		/**
   * @param {object} options
   */
		init: function init() /*options*/{
			this.polys = [{
				priority: 100,
				resource: DashboardStringResources
			}];
		},

		/**
   * Register a new StringResource bundle.
   *
   * @param {object} stringResource			The StringResource to register. Must implement a get(key, interpolationOptions)
   *                                  function which returns the key if the resource was not found
   * @param {number} priority		            Priority (number) given to this new resource, lower priority is more important.
   *                                  Default resource has priority 100.
   */
		register: function register(stringResource, priority) {
			var newPoly = {
				priority: priority,
				resource: stringResource
			};
			if (_.find(this.polys, function (poly) {
				return poly.priority === priority && poly.resource === stringResource;
			})) {
				// We allow duplicate priorities and duplicate resources. Just not both.
				return;
			}
			var newIndex = _.sortedIndex(this.polys, newPoly, 'priority');
			this.polys.splice(newIndex, 0, newPoly);
		},

		/**
   * Get the string resource for the given key and interpolation options. Checks the Storytelling resources first and if
   * not found it checks the Dashboard resources.
   *
   * @param {string} key						The  key of the string to return
   * @param {object} interpolationOptions		Optional interpolation options (see poly.t documentation for details)
   * @returns	{string}	The string to display
   */
		get: function get(key, interpolationOptions) {
			var msg = key;
			for (var i = 0; i < this.polys.length; i++) {
				msg = this.polys[i].resource.get(key, interpolationOptions);
				if (key != msg && msg.indexOf(Lexicon.NOT_TRANSLATED) !== 0) {
					break;
				}
			}
			return msg;
		},

		destroy: function destroy() {
			this.polys = null;
		}
	};

	function StringService(options) {
		this.init(options);
	}

	Object.keys(_stringService).forEach(function (key) {
		StringService.prototype[key] = _stringService[key];
	});

	return StringService;
});
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