(function($, _) {
	var isNotEmptyString = function(str) {
		if (_.isString(str)) {
			return str.trim().length;
		}
		return 0;
	}

	var init = function($mapWrapper){

		var maxZoom      = 15,
			$mapCanvas   = $mapWrapper.find('.fw-map-canvas'),
			mapCanvasOY  = isNaN(parseInt($mapWrapper.data('map-height'))) ? parseInt($mapCanvas.width() * 0.66) : parseInt($mapWrapper.data('map-height')),
			locations    = $mapWrapper.data('locations'),
			mapType      = $mapWrapper.data('map-type'),
			mapOptions   = {
                scrollwheel: false,
				center: ( 'undefined' !== locations && locations.length) ? calculateCenter(locations) :  new google.maps.LatLng(-34, 150),
				mapTypeId: google.maps.MapTypeId[mapType]
			},
			markerBounds = new google.maps.LatLngBounds(),
			map          = new google.maps.Map($mapCanvas.get(0), mapOptions);

			if ('undefined' !== locations && locations.length) {
				locations.forEach(function(location){
					gMapsCoords = new google.maps.LatLng(location.coordinates.lat, location.coordinates.lng);

					var marker = new google.maps.Marker({
						position: gMapsCoords,
						map: map,
                        icon: FwPhpVars.template_directory+'/images/Temp/Contact/pin.png'
					});
					markerBounds.extend(gMapsCoords);

					//set content InfoWindow template
					if ( isNotEmptyString(location.description) || isNotEmptyString(location.title) || isNotEmptyString(location.url) || isNotEmptyString(location.thumb) ) {

						var template = _.template(
							"<% function isNotEmptyString(str) { if (_.isString(str)) {	return str.trim().length;} return 0; }  %>" +

								"<div class='infowindow'>" +

									"<% if (isNotEmptyString(location.thumb)) { %>" +
										"<div class='infowindow-thump'>" +
											"<img src='<%= location.thumb %>' >" +
										"</div> " +
									"<% } %>" +

									"<div class='infowindow-content'>" +
										"<% if ( isNotEmptyString(location.url) || isNotEmptyString(location.title) ) { %>" +
											"<div class='infowindow-title'>" +
												"<a href='<%- location.url %>'><%- isNotEmptyString(location.title) ?  location.title : location.url  %></a>" +
											"</div>" +
										"<% } %>" +
										"<% if ( isNotEmptyString(location.description) ) { %>"+
											"<div class='infowindow-description'>" +
												"<%= location.description %>" +
											"</div>" +
										"<% } %>" +
									"</div>" +

								"</div>");

						var infowindow = new google.maps.InfoWindow({
							content: template({location: location})
						});

						google.maps.event.addListener(marker, 'click', function() {
                            infowindow.open(map,marker);
						});
					}

                    if(jQuery('.fw-contact-form-absolute').length >0 ){
                        // for set different position of marker (default is centered)
                        google.maps.event.addListenerOnce(map, 'tilesloaded', function(){
                            map_recenter( map, locations, 0, 300 );
                        });
                    }
				});
			}


			//change "zoom"
			map.fitBounds(markerBounds);

			//change zoom to max zoom
			var listener = google.maps.event.addListenerOnce(map, 'zoom_changed', function() {
				if (map.getZoom() > maxZoom) map.setZoom(maxZoom);
				google.maps.event.removeListener(listener);
			});

			$mapCanvas.height(mapCanvasOY);
			$mapCanvas.data('map', map);
	}

	var calculateCenter = function(locations) {
		var Lng,Hyp,Lat,
			total = locations.length,
			X = 0,
			Y = 0,
			Z = 0;

		locations.forEach(function(location){
			var lat = location.coordinates.lat * Math.PI / 180,
				lng = location.coordinates.lng * Math.PI / 180,
				x = Math.cos(lat) * Math.cos(lng),
				y = Math.cos(lat) * Math.sin(lng),
				z = Math.sin(lat);

			X += x;
			Y += y;
			Z += z;
		});

		X /= total;
		Y /= total;
		Z /= total;

		Lng = Math.atan2(Y, X);
		Hyp = Math.sqrt(X * X + Y * Y);
		Lat = Math.atan2(Z, Hyp);

		return { lng: (Lng * 180 / Math.PI), lat: (Lat * 180 / Math.PI) }
	}

    // for different position of marker
    function map_recenter(map,latlng,offsetx,offsety) {
        var point1 = map.getProjection().fromLatLngToPoint(
            (latlng instanceof google.maps.LatLng) ? latlng : map.getCenter()
        );
        var point2 = new google.maps.Point(
            ( (typeof(offsetx) == 'number' ? offsetx : 0) / Math.pow(2, map.getZoom()) ) || 0,
            ( (typeof(offsety) == 'number' ? offsety : 0) / Math.pow(2, map.getZoom()) ) || 0
        );
        map.setCenter(map.getProjection().fromPointToLatLng(new google.maps.Point(
            point1.x - point2.x,
            point1.y + point2.y
        )));
    }

	$(document).ready(function(){
		$('.fw-map').each(function(){
			init($(this));
		});
	});

}(jQuery, _));