/* Copyright (C) 2006 Christian Schneider
 * 
 * This file is part of Nomad.
 * 
 * Nomad 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 2 of the License, or
 * (at your option) any later version.
 * 
 * Nomad 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 Nomad; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
package net.sf.nmedit.jpatch.impl;

import java.io.File;
import javax.swing.event.UndoableEditListener;
import javax.swing.undo.UndoManager;
import javax.swing.undo.UndoableEdit;
import net.sf.nmedit.jpatch.ModuleDescriptions;
import net.sf.nmedit.jpatch.PFactory;
import net.sf.nmedit.jpatch.PModule;
import net.sf.nmedit.jpatch.PModuleContainer;
import net.sf.nmedit.jpatch.PModuleDescriptor;
import net.sf.nmedit.jpatch.PModuleMetrics;
import net.sf.nmedit.jpatch.PParameter;
import net.sf.nmedit.jpatch.PPatch;
import net.sf.nmedit.jpatch.PSettings;
import net.sf.nmedit.jpatch.PUndoableEditFactory;
import net.sf.nmedit.jpatch.history.HistoryUtils;
import net.sf.nmedit.jpatch.history.PUndoableEditSupport;
import net.sf.nmedit.jpatch.history.PBasicUndoableEditFactory;
import net.sf.nmedit.jpatch.history.PUndoManager;

/**
 * The reference implementation of interface {@link PPatch}.
 * 
 * TODO settings / history / meta data implementation
 * @author Christian Schneider
 */
public class PBasicPatch implements PPatch
{

    private ModuleDescriptions moduleDescriptions;
    private PFactory pfactory;
    private String name;
    private Object focusedComponent; 
    private PUndoableEditSupport editSupport = new PUndoableEditSupport();
    private PUndoManager undoManager = new PUndoManager();
    private boolean editSupportEnabled = false;
    private PBasicUndoableEditFactory editFactory = new PBasicUndoableEditFactory();

    public PBasicPatch(ModuleDescriptions moduleDescriptions)
    {
        this(moduleDescriptions, PBasicFactory.getSharedInstance());
    }

    public PBasicPatch(ModuleDescriptions moduleDescriptions, PFactory pfactory)
    {
        this.moduleDescriptions = moduleDescriptions;
        this.pfactory = pfactory;
        
        addUndoableEditListener(undoManager);
    }
    
    public boolean isModified()
    {
        return undoManager.isModified();
    }
    
    public void setModified(boolean modified)
    {
        undoManager.setModified(true);
    }

    public PUndoableEditFactory getUndoableEditFactory()
    {
        return editFactory;
    }
    
    public boolean isEditSupportEnabled()
    {
        return editSupportEnabled;
    }
    
    public void setEditSupportEnabled(boolean enabled)
    {
        if (this.editSupportEnabled != enabled)
        {
            this.editSupportEnabled = enabled;
        }
    }

    public UndoManager getUndoManager()
    {
        return undoManager;
    }

    public PUndoableEditSupport getEditSupport()
    {
        return editSupport;
    }
    
    public ModuleDescriptions getModuleDescriptions()
    {
        return moduleDescriptions;
    }
    
    public PModule createModule(PModuleDescriptor d)
    {
        return getComponentFactory().createModule(d);
    }

    public PFactory getComponentFactory()
    {
        return pfactory;
    }

    public PModuleContainer getModuleContainer(int index)
    {
        throw new UnsupportedOperationException("not implemented");
    }

    public int getModuleContainerCount()
    {
        throw new UnsupportedOperationException("not implemented");
    }

    public PModuleMetrics getModuleMetrics()
    {
        return getModuleDescriptions().getMetrics();
    }

    public String getName()
    {
        return name;
    }
    
    public void setName(String name)
    {
        String oldvalue = this.name;
        String newvalue = name;
        if (oldvalue != newvalue || (oldvalue != null && !oldvalue.equals(name)))
        {
            this.name = newvalue;
            
            updateName(oldvalue, newvalue);
        }
    }

    protected void updateName(String oldname, String newname)
    {   // for overwriting
        
        if (isEditSupportEnabled())
        {
            PUndoableEditFactory factory = getUndoableEditFactory();
            if (factory != null)
            {
                UndoableEdit edit = factory.createPatchNameEdit(this, oldname, newname);
                postEdit(edit);
            }
        }
    }

    public PSettings getSettings()
    {
        throw new UnsupportedOperationException("not implemented");
    }

    public boolean setFocusedComponent(Object f)
    {
        if (focusedComponent != f)
        {
            if (f == null || (f != null && requestFocus(f)))
            {
                this.focusedComponent = f;
                return true;
            }
        }
        return false;
    }
    
    protected boolean requestFocus(Object f)
    {   
        return (f instanceof PParameter);
    }

    public Object getFocusedComponent()
    {
        return focusedComponent;
    }

	public String patchFileString() {
		return null;
	}

	public PPatch createEmptyPatch() {
		return null;
	}

	public PPatch createFromFile(File file) throws Exception {
		return null;
	}

	public int getModuleContainerIndex(PModuleContainer sourceContainer) {
		for (int i = 0; i < getModuleContainerCount(); i++) {
			if (getModuleContainer(i) == sourceContainer)
				return i;
		}
		return -1;
	}

    public boolean isUndoableEditSupportEnabled()
    {
        return editSupportEnabled;
    }

    public void postEdit(UndoableEdit edit)
    {
        if (isUndoableEditSupportEnabled())
        {
            if (HistoryUtils.DEBUG) System.out.println("PBasicPatch.postEdit("+edit+"); ignore="
                    +editFactory.isIgnoreEditEnabled()+"; update-level:"+editSupport.getUpdateLevel());
            if (!editFactory.isIgnoreEditEnabled())
            {
                // undoManager.addEdit(edit);
                editSupport.postEdit(edit);
            }
        }
    }

    public void addUndoableEditListener(UndoableEditListener l)
    {
        editSupport.addUndoableEditListener(l);
    }

    public void removeUndoableEditListener(UndoableEditListener l)
    {
        editSupport.removeUndoableEditListener(l);
    }

    
}