// Current map variable Map
var map;
// Current path variable Polyline
var poly;
// Current markers variable MVCArray
var markers;
var notifier;

// Map initialize
function initMap()
{
    map = new google.maps.Map(
        document.getElementById('map'), {
            zoom : 15,
            center : {
                lat : 50.403757,
                lng : 30.641328
            }
        }
    );
    createNotifier(map);
    poly = new google.maps.Polyline(
        {
            strokeColor : '#000000',
            strokeOpacity : 1.0,
            strokeWeight : 3
        }
    );
    poly.setMap(map);
    markers = new google.maps.MVCArray();
}

/**
 * Map click handler
 *
 * @param event google.maps.LatLng
 */
function addLatLng(event)
{
    var path = poly.getPath();
    path.push(event.latLng);
    var marker = new google.maps.Marker(
        {
            position : event.latLng,
            title : '#' + path.getLength(),
            map : map,
            draggable : true,
            label : path.getLength().toString(10)
        }
    );
    markers.push(marker);
    var passport_id = $('#passport_control').data('passport_id');
    addMarkerToPassport(passport_id, road_passports[passport_id].getLength(), event.latLng);
    marker.addListener('dragend', dragend);
}

function addAt(event)
{
    var index = parseInt(map.lastIndex);
    var passport_id = $('#passport_control').data('passport_id');
    reCalc(index - 1, 1);
    addMarkerToPassport(passport_id, index, event.latLng);
    reCalcucaleDistance(passport_id, index + 1);
    createMarkers(passport_id);
    google.maps.event.clearListeners(map, 'click');
    map.addListener('click', addLatLng);
    hideNotifier(true);
}

/**
 * Fill road passport and table with new element
 *
 * @param passport_id integer Road passport ID
 * @param index integer Poisition in path
 * @param latLng LatLng object
 */
function addMarkerToPassport(passport_id, index, latLng)
{
    var object = createPassportObject();
    object.lat = latLng.lat();
    object.lng = latLng.lng();
    object.num = index;
    object.road_passport_id = passport_id;
    if(index <= 1 && road_passports[passport_id].model.begin)
    {
        object.km = road_passports[passport_id].model.begin;
    } else
    {
        var prev = road_passports[passport_id].getAt(index - 1);
        object.km = (calculateDistance(
            new google.maps.LatLng(
                {
                    lat : parseFloat(prev.lat),
                    lng : parseFloat(prev.lng)
                }
            ), latLng
        ) + parseFloat(prev.km)).toFixed(3);
    }
    road_passports[passport_id].insertAt(index, object);
    addRow(passport_id, index, latLng, object.km);
}

/**
 * Dragend event handler: repaint curve and update row
 *
 * @param event google.maps.LatLng
 */
function dragend(event)
{
    var index = parseInt(this.label);
    repaint(event);
    updateRow(
        index, {
            lat : event.latLng.lat(),
            lng : event.latLng.lng()
        }
    );

}

/**
 * Add row to ( the end of ) the table
 *
 * @param passport_id integer Road passport ID
 * @param index integer New row num
 * @param latLng LatLng object of new point
 */
function addRow(passport_id, index, latLng, km)
{
    $.get(
        template_url, {
            road_passport_id : passport_id,
            lat : latLng.lat(),
            lng : latLng.lng(),
            num : index,
            km : km
        }, function(data)
        {
            if(!data.error)
            {
                var container = $('#passport_control');
                var target = $(container).find('.passport_point_item[data-key=' + (index + 1) + ']');
                if(target.length > 0)
                {
                    $(target).before(data.result.html);
                } else
                {
                    $(container).append(data.result.html);
                }
            } else
            {

            }
        }
    );
}

/**
 * Repaint path from current markers
 *
 * @param event
 */
function repaint(event)
{
    var path = new google.maps.MVCArray();
    markers.forEach(
        function(element, index)
        {
            path.push(element.getPosition());
        }
    );
    poly.setPath(path);
}

/**
 * Clear all current markers
 */
function clearMarkers()
{
    markers.forEach(
        function(element, index)
        {
            element.setMap(null);
        }
    );
    markers = new google.maps.MVCArray();
}

/**
 * Create empty object for road passport point
 *
 * @returns {{km: null, lat: null, lng: null, num: null, point_id: null, road_passport_id: null}}
 */
function createPassportObject()
{
    return {
        km : null,
        lat : null,
        lng : null,
        num : null,
        point_id : null,
        road_passport_id : null
    };
}

/**
 * Create empty object for road passport model
 */
function createPassportModel()
{
    return {
        begin : null,
        end : null,
        region_id : null,
        road_id : null,
        road_passport_id : null,
    };
}

/**
 * Replace all rows starting with @start param on @indent rows
 *
 * @param start
 * @param indent
 */
function reCalc(start, indent)
{
    var container = $('#passport_control');
    var passport_id = parseInt($(container).data('passport_id'));
    if(start > 0)
    {
        elements = $(container).find('[data-key=' + start + '] ~ [data-key]');
    } else
    {
        elements = $(container).find('[data-key]');
    }
    var old_name;
    var new_name;
    var old_id;
    var new_id;
    $.each(
        elements, function(index, value)
        {
            var old_index = $(value).data('key');
            var new_index = old_index + indent;
            $(value).attr('data-key', new_index);
            $(value).data('key', new_index);
            $(value).find('.point_num_value').text(new_index);
            $.each(
                $(value).find('input'), function(i, v)
                {
                    old_name = $(v).attr('name');
                    new_name = old_name.replace(/Point\[\d+\]/, 'Point[' + new_index + ']');
                    $(v).attr('name', new_name);
                    old_id = $(v).attr('id');
                    new_id = old_id.replace(/point-\d+/, 'point-' + new_index);
                    $(v).attr('id', new_id);
                }
            );
            $(value).find('input[name="Point[' + new_index + '][num]"]').val(new_index);
            $(value).find('input[name="Point[' + new_index + '][km]"]').val(NaN);
            $(value).find('.point-menu>a').attr('href', '#pointControl' + new_index);
            $(value).find('.point-menu>a').attr('aria-controls', 'pointControl' + new_index);
            $(value).find('.point_control').attr('id', 'pointControl' + new_index);
        }
    );
}

/**
 * Update @index's row with new @data
 * Supported data:
 * * lat
 * * lng
 *
 * @param index integer
 * @param data object
 */
function updateRow(index, data)
{
    index = parseInt(index);
    var container = $('#passport_control');
    var passport_id = parseInt($(container).data('passport_id'));
    var element = $(container).find('[data-key=' + index + ']');
    if(data.lat)
    {
        $(element).find('#point-' + index + '-lat').val(data.lat);
        road_passports[passport_id].getAt(index).lat = data.lat;
    }
    if(data.lng)
    {
        $(element).find('#point-' + index + '-lng').val(data.lng);
        road_passports[passport_id].getAt(index).lng = data.lng;
    }
    if(index <= 1)
    {
        var km;
        km = road_passports[passport_id].model.begin;
        road_passports[passport_id].getAt(index).km = km;
        $('#point-' + index + '-km').val(km);
        reCalcucaleDistance(passport_id, index + 1);
    } else
    {
        if(data.km)
        {
            $(element).find('#point-' + index + '-km').val(data.km);
            road_passports[passport_id].getAt(index).km = data.km;
            reCalcucaleDistance(passport_id, index + 1);
        } else
        {
            reCalcucaleDistance(passport_id, index);
        }
    }
}

/**
 * Calculate distance between tow LatLng points
 *
 * @param LatLngA LatLng
 * @param LatLngB LatLng
 * @returns integer
 */
function calculateDistance(LatLngA, LatLngB)
{
    return parseFloat((google.maps.geometry.spherical.computeDistanceBetween(LatLngA, LatLngB) / 1000).toFixed(3));
}

/**
 * Fill current markers variable with markers for @passport_id
 *
 * @param passport_id int Road passport ID
 */
function createMarkers(passport_id)
{
    clearMarkers();
    road_passports[passport_id].forEach(
        function(element, index)
        {
            if(element !== undefined)
            {
                var marker = new google.maps.Marker(
                    {
                        position : {
                            lat : parseFloat(element.lat),
                            lng : parseFloat(element.lng)
                        },
                        title : '#' + parseInt(index),
                        map : map,
                        draggable : true,
                        label : parseInt(index).toString(10)
                    }
                );
                markers.push(marker);
                marker.addListener('dragend', dragend);
                repaint();
            }
        }
    );
}

function deleteRow(passport_id, index)
{
    index = parseInt(index);
    var container = $('#passport_control');
    var element = $(container).find('.passport_point_item[data-key=' + index + ']');
    reCalc(index, -1);
    $(element).remove();
    road_passports[passport_id].removeAt(index);
    updateRow(index, {});
    reCalcucaleDistance(passport_id, index + 1);
    createMarkers(passport_id);
    repaint();
}

function showMap()
{
    var body = $('html, body');
    var coords = getMapCoords();
    body.stop().animate({scrollTop : (coords.top - 50)}, 2000, 'swing');
}

function getMapCoords()
{
    var container = map.getDiv();
    return $(container).offset();
}

function createNotifier(map)
{
    var container = document.createElement('div');
    container.id = 'map_notifier';
    container.style.display = 'none';

    var wrapper = document.createElement('div');
    wrapper.style.backgroundColor = '#fff';
    wrapper.style.border = '2px solid #fff';
    wrapper.style.borderRadius = '3px';
    wrapper.style.boxShadow = '0 2px 6px rgba(0,0,0,.3)';
    wrapper.style.cursor = 'pointer';
    wrapper.style.marginBottom = '22px';
    wrapper.style.textAlign = 'center';
    container.appendChild(wrapper);

    // Set CSS for the control interior.
    var text = document.createElement('div');
    text.style.color = 'rgb(25,25,25)';
    text.style.fontFamily = 'Roboto,Arial,sans-serif';
    text.style.fontSize = '16px';
    text.style.lineHeight = '38px';
    text.style.paddingLeft = '5px';
    text.style.paddingRight = '5px';
    text.className = 'map_notifier_text';
    wrapper.appendChild(text);
    container.index = 1;
    map.controls[google.maps.ControlPosition.TOP_CENTER].push(container);
}

function showNotifier(message)
{
    var container = $('#map_notifier');
    if(message)
    {
        setNotifier(message);
    }
    $(container).show();
}

function hideNotifier(clear)
{
    var container = $('#map_notifier');
    $(container).hide();
    if(clear)
    {
        setNotifier('');
    }
}

function setNotifier(message)
{
    var container = $('#map_notifier');
    var text = $(container).find('.map_notifier_text');
    $(text).text(message);
}

function fillPassportModel(passport_id, data)
{
    passport_id = parseInt(passport_id);
    if(!road_passports[passport_id])
    {
        return false;
    }
    if(data.begin)
    {
        road_passports[passport_id].model.begin = parseFloat(data.begin);
    }
    if(data.end)
    {
        road_passports[passport_id].model.end = parseFloat(data.end);
    }
    if(data.region_id)
    {
        road_passports[passport_id].model.region_id = parseFloat(data.region_id);
    }
    if(data.road_id)
    {
        road_passports[passport_id].model.road_id = parseFloat(data.road_id);
    }
    if(data.road_passport_id)
    {
        road_passports[passport_id].model.road_passport_id = parseFloat(data.road_passport_id);
    }
    return true;
}

function reCalcucaleDistance(passport_id, start)
{
    start = parseInt(start);
    var passport = road_passports[passport_id];
    var prev;
    var next;
    for(var i = start; i < passport.getLength(); i++)
    {
        prev = passport.getAt(i - 1);
        next = passport.getAt(i);
        next.km = (calculateDistance(
            new google.maps.LatLng(
                {
                    lat : parseFloat(prev.lat),
                    lng : parseFloat(prev.lng)
                }
            ), new google.maps.LatLng(
                {
                    lat : parseFloat(next.lat),
                    lng : parseFloat(next.lng)
                }
            )
        ) + parseFloat(prev.km)).toFixed(3);
        road_passports[passport_id].setAt(i, next);
        $('#point-' + i + '-km').val(next.km);
    }
}

function fitBounds()
{
    var bounds = new google.maps.LatLngBounds();
    for(var i = 0; i < markers.getLength(); i++)
    {
        bounds.extend(markers.getAt(i).getPosition());
    }
    map.fitBounds(bounds);
}
// var placeIdArray = [];
// var polylines = [];
// var snappedCoordinates = [];
function runSnapToRoad()
{
    var id = $('#passport_control').data('passport_id');
    id = parseInt(id);
    if(!markers.length)
    {
        return false;
    }
    var pathValues = [];
    for(var i = 0; i < markers.length; i++)
    {
        pathValues.push(markers.getAt(i).getPosition().toUrlValue());
    }
    $.get(
        '/frontend/web/point/snap', {
            path : pathValues.join('|'),
            road_passport_id : id
        }, function(data)
        {
            $('#control').empty().append(data.result.html);
            road_passports[id] = new google.maps.MVCArray();
            if(data.result.passport) {
                road_passports[id].model = createPassportModel();
                fillPassportModel(id, data.result.passport);
            }
            road_passports[id].setAt(0, undefined);
            clearMarkers();
            $.each(
                data.result.points, function(index, value)
                {
                    road_passports[id].setAt(index, value);
                    var marker = new google.maps.Marker(
                        {
                            position : {
                                lat : parseFloat(value.lat),
                                lng : parseFloat(value.lng)
                            },
                            title : '#' + parseInt(value.num),
                            map : map,
                            draggable : true,
                            label : parseInt(value.num).toString(10)
                        }
                    );
                    markers.push(marker);
                    marker.addListener('dragend', dragend);
                }
            );
            repaint();
            fitBounds();
            reCalcucaleDistance(id, 2);
        }
    );
    //     $.get('https://roads.googleapis.com/v1/snapToRoads', {
    //         interpolate: true,
    //         key: apiKey,
    //         path: pathValues.join('|')
    //     }, function(data) {
    //         processSnapToRoadResponse(data);
    //         drawSnappedPolyline();
    //     });
}
// function processSnapToRoadResponse(data) {
//     snappedCoordinates = [];
//     placeIdArray = [];
//     for (var i = 0; i < data.snappedPoints.length; i++) {
//         var latlng = new google.maps.LatLng(
//             data.snappedPoints[i].location.latitude,
//             data.snappedPoints[i].location.longitude);
//         snappedCoordinates.push(latlng);
//         placeIdArray.push(data.snappedPoints[i].placeId);
//     }
// }
// function drawSnappedPolyline() {
//     var snappedPolyline = new google.maps.Polyline({
//         path: snappedCoordinates,
//         strokeColor: 'black',
//         strokeWeight: 3
//     });
//     snappedPolyline.setMap(map);
//     polylines.push(snappedPolyline);
// }