<?php

namespace ibrarturilatlngfinder;

use yiiwebView;

/**
 * A widget to find Latitude and Longitude using Google Maps for Yii Framework 2
 * by Ibrar Turi
 *
 * @see https://github.com/ibrarturi/yii2-latlon-finder
 * @author Ibrar Turi <ibrarturi@gmail.com>
 * @since 1.0
 */
class LatLngFinder extends yiibaseWidget
{
    /**
     * @var string $latAttribute Latitude attribute id
     */
    public $latAttribute    = null;

    /**
     * @var string $lngAttribute Longitude attribute id
     */
    public $lngAttribute    = null;

    /**
     * @var string $zoomAttribute Zomm attribute id
     */
    public $zoomAttribute   = null;

    /**
     * @var string $mapCanvasId Map canvas id
     */
    public $mapCanvasId     = null;

    /**
     * @var integer $mapWidth Width of the map canvas
     */
    public $mapWidth        = null;

    /**
     * @var integer $mapHeight Height of the map canvas
     */
    public $mapHeight       = null;

    /**
     * @var float $defaultLat Default Latitude for the map
     */
    public $defaultLat      = null;

    /**
     * @var float $defaultLng Default Longitude for the map
     */
    public $defaultLng      = null;

    /**
     * @var integer $defaultZoom Default initial Zoom for the map
     */
    public $defaultZoom     = null;

    /**
     * @var bool $enableZoomField If set to boolean true then the zoom value will be assinged to the zoom field
     */
    public $enableZoomField = null;

    /**
     * @var object $model Object model
     */
    public $model = null;


    public function init()
    {
        parent::init();

        $this->model                = ( isset($this->model) ) ? $this->model : null;

        if ($this->model)
        {
            $formName = strtolower($this->model->formName());

            $this->latAttribute     = ( isset($this->latAttribute) ) ? $formName.'-'.$this->latAttribute : $formName.'-'.'lat';
            $this->lngAttribute     = ( isset($this->lngAttribute) ) ? $formName.'-'.$this->lngAttribute : $formName.'-'.'lng';
            $this->zoomAttribute    = ( isset($this->zoomAttribute) ) ? $formName.'-'.$this->zoomAttribute : $formName.'-'.'zoom';
        }
        else
        {
            $this->latAttribute     = ( isset($this->latAttribute) ) ? $this->latAttribute : 'lat';
            $this->lngAttribute     = ( isset($this->lngAttribute) ) ? $this->lngAttribute : 'lng';
            $this->zoomAttribute    = ( isset($this->zoomAttribute) ) ? $this->zoomAttribute : 'zoom';
        }

        $this->mapCanvasId      = ( isset($this->mapCanvasId) ) ? $this->mapCanvasId : 'map';
        $this->mapWidth         = ( isset($this->mapWidth) ) ? $this->mapWidth : 450;
        $this->mapHeight        = ( isset($this->mapHeight) ) ? $this->mapHeight : 300;
        $this->defaultLat       = ( isset($this->defaultLat) ) ? $this->defaultLat : -34.397;
        $this->defaultLng       = ( isset($this->defaultLng) ) ? $this->defaultLng : 150.644;
        $this->defaultZoom      = ( isset($this->defaultZoom) ) ? $this->defaultZoom : 8;
        $this->enableZoomField  = ( isset($this->enableZoomField) ) ? ( ($this->enableZoomField==true) ? 1 : 0 ) : true;

        $this->registerAssets();

    }

    /**
     * @inheritdoc
     */
    public function run()
    {
        $js = <<<SCRIPT

            var map = null;
            var marker = null;
            var markers = [];
            var enalbeZoom = $this->enableZoomField;

            function initMap() {
                var mapOptions = {
                    zoom: $this->defaultZoom,
                    center: {lat: $this->defaultLat, lng: $this->defaultLng},
                    mapTypeId: google.maps.MapTypeId.ROADMAP
                };

                map = new google.maps.Map(document.getElementById('$this->mapCanvasId'), mapOptions);

                google.maps.event.addListener(map, 'click', function(e) {
                    placeMarker(e.latLng, map);
                });

                google.maps.event.addListener(map, 'zoom_changed', function(e) {
                    var zoom = map.getZoom();
                    if (enalbeZoom) { document.getElementById('$this->zoomAttribute').value = zoom; }
                });
            }

            google.maps.event.addDomListener(window, 'load', initMap);

            function placeMarker(position, map) {
                    if(marker){
                         marker.setMap(null);
                    }

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

                    var lat = position.lat();
                    var lng = position.lng();
                    var zoom = map.getZoom();

                    document.getElementById('$this->latAttribute').value = lat;
                    document.getElementById('$this->lngAttribute').value = lng;
                    if (enalbeZoom) { document.getElementById('$this->zoomAttribute').value = zoom; }

                    google.maps.event.addListener(marker, 'drag', function(e) {
                        var lat = e.latLng.lat();
                        var lng = e.latLng.lng();
                        var zoom = map.getZoom();

                        document.getElementById('$this->latAttribute').value = lat;
                        document.getElementById('$this->lngAttribute').value = lng;
                        if (enalbeZoom) { document.getElementById('$this->zoomAttribute').value = zoom; }
                    });

                    map.panTo(position);
                    /*markers.push(marker);*/
                    marker.setMap(map);

            }


SCRIPT;

        $this->getView()->registerJs($js);

        echo '<div id="' . $this->mapCanvasId . '" style="width:'.$this->mapWidth.'px;height:'.$this->mapHeight.'px; margin-bottom: 20px;"></div>';

    }

    protected function registerAssets()
    {
        $view = $this->getView();
        $view->registerJsFile('https://maps.googleapis.com/maps/api/js?key=AIzaSyDiP7bkTtT0wDRwh9tqZoYwErHAMc_BgGM', ['position' => View::POS_HEAD]);
    }
}

<?= $form->field($model, 'fpro_lat') ?>
    <?= $form->field($model, 'fpro_lan') ?>
    <?= $form->field($model, 'fpro_field2')->textInput(['readOnly' => true]) ?>

    <?= ibrarturilatlngfinderLatLngFinder::widget([
        'model' => $model,
        'latAttribute' => 'fpro_lat',
        'lngAttribute' => 'fpro_lan',
        'zoomAttribute' => 'fpro_field2',
        'mapCanvasId' => 'map',
        'mapWidth' => 350,
        'mapHeight' => 300,
        'defaultLat' => 13.0915117329,
        'defaultLng' => 77.4077528715,
        'defaultZoom' => 20,
        'enableZoomField' => true,
    ]); ?>