function displayIntoDiv(divName, info) {
	$('#' + divName).html(info);	
}
function roundNumber(num, dec) {
	var result = Math.round(num*Math.pow(10,dec))/Math.pow(10,dec);
	return result;
}
function convert_meters(distance){
	//Converts meters to miles
	var miles = distance * 0.000621371192;
	miles = roundNumber(miles,2);
	//converts meters to km
	var km  = distance / 1000;
	km = roundNumber(km,2);
	//export distances in array
	var distance_array = [];
	distance_array[0] = miles;
	distance_array[1] = km;
	return distance_array;
}
function Coordinates(){
	//Gathers info from page
	this.clickPass = function(){
		  var glocation;
		  var glocation2;
		  glocation = $('#user_address1').val();
		  glocation2 = $('#user_address2').val();
		  //Dumps user input into div
		  displayIntoDiv('location1', glocation);
		  displayIntoDiv('location2', glocation2);
		  //Enters user input into newDrive object
		  this.inputLocations = [];
		  this.inputLocations[0] = glocation;
		  this.inputLocations[1] = glocation2;
	};
	//holds drive distance 
	this.driveDistance = 0;
}
function googleDriveCall(newDrive){
	  //Render object
	  var directionDisplay;
	  //Directions object
	  var directionsService = new google.maps.DirectionsService();
	  //Setup request using user input
	  var gOrigin = newDrive.inputLocations[0];
	  var gFinal = newDrive.inputLocations[1];
	  //Create Direction Request object
	  var gReq = {
			origin: gOrigin, 
			destination: gFinal,
			travelMode: google.maps.DirectionsTravelMode.DRIVING
		  };
	  //Call Directions Service and use callback for the rest of the function
	  directionsService.route(gReq, function(results, status){
					if (status == google.maps.DirectionsStatus.OK) {
					  //console.log(results);
					  $('div#error').empty();
					  var google_d = results.routes[0].legs[0].distance.value;
					  google_d = convert_meters(google_d)
					  //newDrive.driveDistance = google_d[0] + "mi / " + google_d[1] + "km";
 newDrive.driveDistance = google_d[1] + "km";
			  displayIntoDiv('location1', results.routes[0].legs[0].start_address);
					  displayIntoDiv('location2', results.routes[0].legs[0].end_address);
 
					  displayIntoDiv('drive_distance', newDrive.driveDistance);
					  directionsDisplay = new google.maps.DirectionsRenderer();
					  directionsDisplay.setDirections(results);
					  showMap(directionsDisplay);
					}
					else
					{
						//console.log(results);
						var error_message = 'Ne mogu da izračunam rastojanje izmedju dva mesta. Ili niste upisali u polja gradove?';
						displayIntoDiv('error', error_message);
						$('div#map_canvas').fadeOut();
						$('div.answers').fadeOut();
						$('div#error').fadeIn();
					}
								  });
}
function showMap(directionsDisplay)
{
    $('div.answers').fadeIn();
	var chicago = new google.maps.LatLng(41.850033, -87.6500523);
	var myOptions = {
				zoom: 3,
				center: chicago,
				mapTypeId: google.maps.MapTypeId.ROADMAP
				};
	var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
	directionsDisplay.setMap(map);
	$('div#map_canvas').fadeIn();
}