/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 Benjamin Becquet
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * https://github.com/bbecquet/Leaflet.RotatedMarker
 */
(function() {
    // save these original methods before they are overwritten
    var proto_initIcon = L.Marker.prototype._initIcon;
    var proto_setPos = L.Marker.prototype._setPos;

    var oldIE = (L.DomUtil.TRANSFORM === 'msTransform');

    L.Marker.addInitHook(function () {
        var iconOptions = this.options.icon && this.options.icon.options;
        var iconAnchor = iconOptions && this.options.icon.options.iconAnchor;
        if (iconAnchor) {
            iconAnchor = (iconAnchor[0] + 'px ' + iconAnchor[1] + 'px');
        }
        this.options.rotationOrigin = this.options.rotationOrigin || iconAnchor || 'center bottom' ;
        this.options.rotationAngle = this.options.rotationAngle || 0;

        // Ensure marker keeps rotated during dragging
        this.on('drag', function(e) { e.target._applyRotation(); });
    });

    L.Marker.include({
        _initIcon: function() {
            proto_initIcon.call(this);
        },

        _setPos: function (pos) {
            proto_setPos.call(this, pos);
            this._applyRotation();
        },

        _applyRotation: function () {
            if(this.options.rotationAngle) {
                this._icon.style[L.DomUtil.TRANSFORM+'Origin'] = this.options.rotationOrigin;

                if(oldIE) {
                    // for IE 9, use the 2D rotation
                    this._icon.style[L.DomUtil.TRANSFORM] = 'rotate(' + this.options.rotationAngle + 'deg)';
                } else {
                    // for modern browsers, prefer the 3D accelerated version
                    this._icon.style[L.DomUtil.TRANSFORM] += ' rotateZ(' + this.options.rotationAngle + 'deg)';
                }
            }
        },

        setRotationAngle: function(angle) {
            this.options.rotationAngle = angle;
            this.update();
            return this;
        },

        setRotationOrigin: function(origin) {
            this.options.rotationOrigin = origin;
            this.update();
            return this;
        }
    });
})();