/*******************************************************************************
 * Copyright (c) 2012, Directors of the Tyndale STEP Project
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met:
 * 
 * Redistributions of source code must retain the above copyright 
 * notice, this list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright 
 * notice, this list of conditions and the following disclaimer in 
 * the documentation and/or other materials provided with the 
 * distribution.
 * Neither the name of the Tyndale House, Cambridge (www.TyndaleHouse.com)  
 * nor the names of its contributors may be used to endorse or promote 
 * products derived from this software without specific prior written 
 * permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 
 * THE POSSIBILITY OF SUCH DAMAGE.
 ******************************************************************************/
/**
 * Code for showing and interacting with the timeline
 */

function GeographyWidget(rootElement, passages) {
	this.rootElement = rootElement;
	this.initialised = false;
	this.passages = passages; 
	this.markers = [];
	this.removeMarkers = true;
	
	var self = this;
	$(rootElement).hear("show-maps", function(selfElement, data) {
		$(window).resize(self.onResize);
		self.initialiseMaps();
		self.goToReference(self.passages[data.passageId].getReference());
	});
	
	$(rootElement).hear("hide-maps", function(selfElement) {
		//TODO remove listener to passage change
	});
	
	$(rootElement).hear("passage-changed", function(selfElement, data) {
		self.goToReference(data.reference);
	});
};

/**
 * initialises the maps
 */
GeographyWidget.prototype.initialiseMaps = function() {
	//default could be Jerusalem
	var latlng = new google.maps.LatLng(31.777444, 35.234935);

	if(!this.initialised) {
	    var myOptions = {
	      zoom: 6,
	      center: latlng,
	      mapTypeId: google.maps.MapTypeId.TERRAIN
	    };
	    this.map = new google.maps.Map(this.rootElement.get(0), myOptions);
	    initialised = true;
	}
};

GeographyWidget.prototype.goToReference = function(reference) {
	if(this.map) {
		
		if(this.removeMarkers) {
			this.removeMarkersFromMap();
		}
		
		var self = this;
		$.getSafe(GEOGRAPHY_GET_PLACES + reference, function(places) {
			$.each(places, function(index, place) {
				var content = "<div>" + place.esvName + "<br /><div>@ " + place.latitude + ", " + place.longitude + "</div>" + place.comment + "</div>";
				var infoWindow = new google.maps.InfoWindow({
				    content: content
				});
				
				var marker = new google.maps.Marker({
						position: new google.maps.LatLng(place.latitude, place.longitude),
						map: self.map,
						title: place.esvName
				});
				
				self.markers.push(marker);
				google.maps.event.addListener(marker, 'click', function() {
					infoWindow.open(self.map, marker);
				});
			});
		});
	}
};

/**
 * removes all markers from the map
 */
GeographyWidget.prototype.removeMarkersFromMap = function() {
	if(this.markers) {
		for(var ii in this.markers) {
			this.markers[ii].setMap(null);
		}
	}
};