// XAAL toolkit
// Copyright (C) 2009 Ville Karavirta <vkaravir(a)cs.hut.fi>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
package xaal.objects;

import java.util.HashMap;

import xaal.objects.graphical.Style;
import xaal.objects.metadata.Metadata;
import xaal.objects.structures.Structure;
import xaal.util.XaalErrorLog;

/**
 * Represents the top-level element of a XAAL document. 
 */
public class Xaal {
    private Metadata metadata;
    private Initial initial;
    private Defs defs;
    private Animation animation;
    private String version;
    
    private HashMap structures;
    private XaalErrorLog errorLog;
    private HashMap objects;
    /**
     * 
     */
    public Xaal() {
        super();
    }

    
    /**
     * @return Returns the animation.
     */
    public Animation getAnimation() {
        if (animation == null)
            animation = new Animation(this);
        return animation;
    }
    /**
     * @param animation The animation to set.
     */
    public void setAnimation(Animation animation) {
        this.animation = animation;
    }
    /**
     * @return Returns the defs.
     */
    public Defs getDefs() {
        if (defs == null)
            defs = new Defs();
        return defs;
    }
    /**
     * @param defs The defs to set.
     */
    public void setDefs(Defs defs) {
        this.defs = defs;
    }
    /**
     * @return Returns the initial.
     */
    public Initial getInitial() {
        if (initial == null) {
            initial = new Initial();
        }
        return initial;
    }
    /**
     * @param initial The initial to set.
     */
    public void setInitial(Initial initial) {
        this.initial = initial;
    }
    /**
     * @return Returns the metadata.
     */
    public Metadata getMetadata() {
        if (metadata == null) {
            metadata = new Metadata();
        }
        return metadata;
    }
    /**
     * @param metadata The metadata to set.
     */
    public void setMetadata(Metadata metadata) {
        this.metadata = metadata;
    }

    /**
     * @return Returns the version.
     */
    public String getVersion() {
        return version;
    }
    /**
     * @param version The version to set.
     */
    public void setVersion(String version) {
        this.version = version;
    }

    public void addStructure(String id, Structure str) {
        if (structures == null)
            structures = new HashMap();
        structures.put(id, str);
        addObject(id, str);
    }
    
    public Structure getStructure(String id) {
        if (structures != null)
            return (Structure) structures.get(id);
        else
            return null;
    }
    
    public void addObject(String id, Object o) {
        if (objects == null)
            objects = new HashMap();
        objects.put(id, o);
    }
    
    public Object getObject(String id) {
        if (objects != null)
            return objects.get(id);
        else
            return null;
    }


    /**
     * @return
     */
    public Object getStructures() {
        return structures;
    }

    public void setErrorLog(XaalErrorLog errorLog) {
        this.errorLog = errorLog;
    }

    
    /**
     * Returns the XaalErrorLog attached to this object. By default,
     * this is a log that outputs errors to System.err on level 
     * XaalErrorLog.NONE.
     * @return The XaalErrorLog attached to this object. 
     */
    public XaalErrorLog getErrorLog() {
        if (errorLog == null) {
            errorLog = new XaalErrorLog(System.err);
            errorLog.setLevel(XaalErrorLog.NONE);
        }
        return errorLog;
    }

    public void addStyle(Style s) {
        getDefs().addStyle(s);
    }

    public Style getStyle(String id) {
        return getDefs().getStyle(id);
    }


    public XaalObject getXaalObject(String value) {
        if (objects.containsKey(value)) {
            return (XaalObject) objects.get(value);
        } else if (structures.containsKey(value)) {
            return (XaalObject) structures.get(value);
        }
        // todo: coordinates etc for getXaalObject
        return null;
    }
}