/*
 * Fuel UX Data components - static data source
 * https://github.com/ExactTarget/fuelux-data
 *
 * Copyright (c) 2012 ExactTarget
 * Licensed under the MIT license.
 */

(function (root, factory) {
	if (typeof define === 'function' && define.amd) {
		define(['underscore'], factory);
	} else {
		root.StaticDataSource = factory();
	}
}(this, function () {

	var StaticDataSource = function (options) {
		this._formatter = options.formatter;
		this._columns = options.columns;
		this._delay = options.delay || 0;
		this._data = options.data;
	};

	StaticDataSource.prototype = {

		columns: function () {
			return this._columns;
		},

		data: function (options, callback) {
			var self = this;

			setTimeout(function () {
				var data = $.extend(true, [], self._data);

				// SEARCHING
				if (options.search) {
					data = _.filter(data, function (item) {
						var match = false;

						_.each(item, function (prop) {
							if (_.isString(prop) || _.isFinite(prop)) {
								if (prop.toString().toLowerCase().indexOf(options.search.toLowerCase()) !== -1) match = true;
							}
						});

						return match;
					});
				}

				// FILTERING
				if (options.filter) {
					data = _.filter(data, function (item) {
						switch(options.filter.value) {
							case 'lt5m':
								if(item.population < 5000000) return true;
								break;
							case 'gte5m':
								if(item.population >= 5000000) return true;
								break;
							default:
								return true;
								break;
						}
					});
				}

				var count = data.length;

				// SORTING
				if (options.sortProperty) {
					data = _.sortBy(data, options.sortProperty);
					if (options.sortDirection === 'desc') data.reverse();
				}

				// PAGING
				var startIndex = options.pageIndex * options.pageSize;
				var endIndex = startIndex + options.pageSize;
				var end = (endIndex > count) ? count : endIndex;
				var pages = Math.ceil(count / options.pageSize);
				var page = options.pageIndex + 1;
				var start = startIndex + 1;

				data = data.slice(startIndex, endIndex);

				if (self._formatter) self._formatter(data);

				callback({ data: data, start: start, end: end, count: count, pages: pages, page: page });

			}, this._delay)
		}
	};

	return StaticDataSource;
}));