/*
 *    Copyright [2011] [wisemapping]
 *
 *   Licensed under WiseMapping Public License, Version 1.0 (the "License").
 *   It is basically the Apache License, Version 2.0 (the "License") plus the
 *   "powered by wisemapping" text requirement on every single page;
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the license at
 *
 *       http://www.wisemapping.org/license
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */

mindplot.IconGroup = new Class({
    initialize : function(topic) {
        var offset = topic.getOffset();

        this.options = {
            width:0,
            height:0,
            x:offset.x / 2,
            y:offset.y,
            icons:[],
            topic:topic,
            nativeElem:new web2d.Group({width: 2, height:2,x: offset, y:offset, coordSizeWidth:1,coordSizeHeight:1})
        };
        this.updateIconGroupPosition();
        this.registerListeners();
    },

    setPosition : function(x, y) {
        this.options.x = x;
        this.options.y = y;
        this.options.nativeElem.setPosition(x, y);
    },

    getPosition : function() {
        return {x:this.options.x, y:this.options.y};
    },

    setSize : function(width, height) {
        this.options.width = width;
        this.options.height = height;
        this.options.nativeElem.setSize(width, height);
        this.options.nativeElem.setCoordSize(width, height);
    },

    getSize : function() {
        return {width:this.options.width, height:this.options.height};
    },

    addIcon : function(icon) {
        icon.setGroup(this);
        var newIcon = icon.getImage();
        var nativeElem = this.options.nativeElem;
        var iconSize = newIcon.getSize();
        var size = nativeElem.getSize();
        newIcon.setPosition(size.width, 0);
        this.options.icons.extend([icon]);

        nativeElem.appendChild(newIcon);

        size.width = size.width + iconSize.width;
        if (iconSize.height > size.height) {
            size.height = iconSize.height;
        }

        nativeElem.setCoordSize(size.width, size.height);
        nativeElem.setSize(size.width, size.height);
        this.options.width = size.width;
        this.options.height = size.height;
    },

    getIcons : function() {
        return this.options.icons;
    },

    removeIcon : function(url) {
        this._removeIcon(this.getIcon(url));
    },

    removeImageIcon : function(icon) {

        var imgIcon = this.getImageIcon(icon);
        this._removeIcon(imgIcon);
    },

    getIcon : function(url) {
        var result = null;
        this.options.icons.each(function(el, index) {
            var nativeImage = el.getImage();
            if (nativeImage.getHref() == url) {
                result = el;
            }
        }, this);
        return result;
    },

    getImageIcon : function(icon) {
        var result = null;
        this.options.icons.each(function(el, index) {
            if (result == null && $defined(el.getModel().isIconModel) && el.getId() == icon.getId() && el.getUiId() == icon.getUiId()) {
                result = el;
            }
        }, this);
        return result;
    },

    findIconFromModel : function(iconModel) {
        var result = null;
        this.options.icons.each(function(el, index) {
            var elModel = el.getModel();
            if (result == null && $defined(elModel.isIconModel) && elModel.getId() == iconModel.getId()) {
                result = el;
            }
        }, this);

        if (result == null) {
            throw "Icon can no be found.";
        }

        return result;
    },

    _removeIcon : function(icon) {
        var nativeImage = icon.getImage();
        this.options.icons.erase(icon);
        var iconSize = nativeImage.getSize();
        var size = this.options.nativeElem.getSize();
        var position = nativeImage.getPosition();
        var childs = this.options.nativeElem.removeChild(nativeImage);
        this.options.icons.each(function(icon, index) {
            var img = icon.getImage();
            var pos = img.getPosition();
            if (pos.x > position.x) {
                img.setPosition(pos.x - iconSize.width, 0);
            }
        }.bind(this));
        size.width = size.width - iconSize.width;
        this.setSize(size.width, size.height);
    },

   getNativeElement : function() {
        return this.options.nativeElem;
    },

    moveToFront : function() {
        this.options.nativeElem.moveToFront();
    },

    registerListeners : function() {
        this.options.nativeElem.addEventListener('click', function(event) {
            // Avoid node creation ...
            if ($defined(event.stopPropagation)) {
                event.stopPropagation(true);
            } else {
                event.cancelBubble = true;
            }

        });
        this.options.nativeElem.addEventListener('dblclick', function(event) {
            // Avoid node creation ...
            if ($defined(event.stopPropagation)) {
                event.stopPropagation(true);
            } else {
                event.cancelBubble = true;
            }

        });
    },

    getTopic : function() {
        return this.options.topic;
    },

    updateIconGroupPosition : function() {
        var offsets = this._calculateOffsets();
        this.setPosition(offsets.x, offsets.y);
    },

    _calculateOffsets : function() {
        var offset = this.options.topic.getOffset();
        var text = this.options.topic.getTextShape();
        var sizeHeight = text.getHtmlFontSize();
        var yOffset = offset;
        var shape = this.options.topic.getShapeType();
        yOffset = text.getPosition().y + (sizeHeight - 18) / 2 + 1;
        return {x:offset, y:yOffset};
    }
});