var geocoder;
var map;
var marker;
var directionsService = new google.maps.DirectionsService();

function initialize() {
    var latlng = new google.maps.LatLng(-18.898123, -48.265920);
    var options = {
        zoom: 15,
        center: latlng,
        mapTypeId: google.maps.MapTypeId.ROADMAP
    };

    map = new google.maps.Map(document.getElementById("mapa"), options);

    geocoder = new google.maps.Geocoder();

    marker = new google.maps.Marker({
        map: map,
        draggable: true,
    });

    marker.setPosition(latlng);
}

$(document).ready(function () {
    initialize();

    function carregarNoMapa(endereco) {
        geocoder.geocode({ 'address': endereco + ', Brasil', 'region': 'BR' }, function (results, status) {
            if (status == google.maps.GeocoderStatus.OK) {
                if (results[0]) {
                    var latitude = results[0].geometry.location.lat();
                    var longitude = results[0].geometry.location.lng();

                    $('#txtEndereco').val(results[0].formatted_address);
                    $('#txtLatitude').val(latitude);
                    $('#txtLongitude').val(longitude);

                    var location = new google.maps.LatLng(latitude, longitude);
                    marker.setPosition(location);
                    map.setCenter(location);
                    map.setZoom(16);
                }
            }
        })
    }

    google.maps.event.addListener(marker, 'drag', function () {
        geocoder.geocode({ 'latLng': marker.getPosition() }, function (results, status) {
            if (status == google.maps.GeocoderStatus.OK) {
                if (results[0]) {
                    $('#txtEndereco').val(results[0].formatted_address);
                    $('#txtLatitude').val(marker.getPosition().lat());
                    $('#txtLongitude').val(marker.getPosition().lng());
                }
            }
        });
    });

    /*$("#txtEndereco").autocomplete({
                    source: function (request, response) {
                        geocoder.geocode({ 'address': request.term + ', Brasil', 'region': 'BR' }, function (results, status) {
                            response($.map(results, function (item) {
                                return {
                                    label: item.formatted_address,
                                    value: item.formatted_address,
                                    latitude: item.geometry.location.lat(),
                                    longitude: item.geometry.location.lng()
                                }
                            }));
                        })
                    },
                    select: function (event, ui) {
                        $("#txtLatitude").val(ui.item.latitude);
                        $("#txtLongitude").val(ui.item.longitude);
                        var location = new google.maps.LatLng(ui.item.latitude, ui.item.longitude);
                        marker.setPosition(location);
                        map.setCenter(location);
                        map.setZoom(16);
                    }
                });*/

    $("#btnEndereco").click(function(){
        var directionsDisplay = new google.maps.DirectionsRenderer();
        var request = {
            origin: $("#txtEndereco").val(),
            destination: marker.position,
            travelMode: google.maps.DirectionsTravelMode.DRIVING
        };

        directionsService.route(request, function(response, status) {
            if (status == google.maps.DirectionsStatus.OK) {
                directionsDisplay.setDirections(response);
                directionsDisplay.setMap(map);
            }
        });
    });
});