function init() {
    var myMap = new ymaps.Map('map', {
            center: [60.906882, 30.067233],
            zoom: 11,
            type: 'yandex#map',
            behaviors: ['scrollZoom', 'drag']
        }),
        searchStartPoint = new ymaps.control.SearchControl({
            useMapBounds: true,
            noPlacemark: true,
            noPopup: true,
            placeholderContent: 'Адрес начальной точки'
        }),
        searchFinishPoint = new ymaps.control.SearchControl({
            useMapBounds: true,
            noPopup: true,
            noPlacemark: true,
            placeholderContent: 'Адрес конечной точки'
        }),
        calculator = new DeliveryCalculator(myMap, myMap.getCenter());

    myMap.controls.add(searchStartPoint, { left: 5, top: 5 });
    myMap.controls.add(searchFinishPoint, { left: 5, top: 5 });

    searchStartPoint.events.add('resultselect', function (e) {
        var results = searchStartPoint.getResultsArray(),
            selected = e.get('resultIndex'),
            point = results[selected].geometry.getCoordinates();

        calculator.setStartPoint(point);
    });

    searchFinishPoint.events.add('resultselect', function (e) {
        var results = searchFinishPoint.getResultsArray(),
            selected = e.get('resultIndex'),
            point = results[selected].geometry.getCoordinates();

        calculator.setFinishPoint(point);
    });
}

function DeliveryCalculator(map, finish) {
    this._map = map;
    this._start = null;
    this._route = null;

    map.events.add('click', this._onClick, this);
}

var ptp = DeliveryCalculator.prototype;

ptp._onClick= function (e) {
    if (this._start) {
        this.setFinishPoint(e.get('coordPosition'));
    } else {
        this.setStartPoint(e.get('coordPosition'));
    }
};

ptp._onDragEnd = function (e) {
    this.getDirection();
}

ptp.getDirection = function () {
    if (this._route) {
        this._map.geoObjects.remove(this._route);
    }

    if (this._start && this._finish) {
        var self = this,
            start = this._start.geometry.getCoordinates(),
            finish = this._finish.geometry.getCoordinates();

        ymaps.geocode(start, { results: 1 })
            .then(function (geocode) {
                var address = geocode.geoObjects.get(0) &&
                    geocode.geoObjects.get(0).properties.get('balloonContentBody') || '';

                ymaps.route([start, finish])
                    .then(function (router) {
                        var distance = Math.round(router.getLength() / 1000),
                            message = $(".mes-rast").val(distance);
												
                        self._route = router.getPaths();
												
                        self._route.options.set({ strokeWidth: 5, strokeColor: '0000ffff', opacity: 0.5 });
                        self._map.geoObjects.add(self._route);
                        self._start.properties.set('balloonContentBody', address + message.replace('%s', self.calculate(distance)));

                    });
            });
        self._map.setBounds(self._map.geoObjects.getBounds())
    }
};

ptp.setStartPoint = function (position) {
    if(this._start) {
        this._start.geometry.setCoordinates(position);
    }
    else {
        this._start = new ymaps.Placemark(position, { iconContent: 'А' }, { draggable: true });
        this._start.events.add('dragend', this._onDragEnd, this);
        this._map.geoObjects.add(this._start);
    }
    this.getDirection();
};

ptp.setFinishPoint = function (position) {
    if(this._finish) {
        this._finish.geometry.setCoordinates(position);
    }
    else {
        this._finish = new ymaps.Placemark(position, { iconContent: 'Б' }, { draggable: true });
        this._finish.events.add('dragend', this._onDragEnd, this);
        this._map.geoObjects.add(this._finish);
    }
    this.getDirection();
};

ptp.calculate = function (len) {
    // Константы.
    var DELIVERY_TARIF = 20,
        MINIMUM_COST = 500;

    return Math.max(len * DELIVERY_TARIF, MINIMUM_COST);
};

ymaps.ready(init);