/***************************************************************************************************
 * Copyright (c) 2009 Eteration A.S. and Gorkem Ercan. All rights reserved. This program and the
 * accompanying materials are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors: Gorkem Ercan - initial API and implementation
 *               
 **************************************************************************************************/
package org.eclipse.jst.server.generic.core.internal.publishers;

import java.io.IOException;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.core.runtime.Status;
import org.eclipse.jst.server.core.IEnterpriseApplication;
import org.eclipse.jst.server.core.IJ2EEModule;
import org.eclipse.jst.server.generic.core.internal.CorePlugin;
import org.eclipse.jst.server.generic.core.internal.GenericServer;
import org.eclipse.jst.server.generic.core.internal.Trace;
import org.eclipse.wst.server.core.IModule;
import org.eclipse.wst.server.core.IServer;
import org.eclipse.wst.server.core.model.IModuleResource;
import org.eclipse.wst.server.core.util.ProjectModule;

/**
 * Utility for EAR module assembly.
 */
public class EarModuleAssembler extends AbstractModuleAssembler {

	protected EarModuleAssembler(IModule module, GenericServer server, IPath assembleRoot)
	{
		super(module, server, assembleRoot);
	}

	public IPath assemble(IProgressMonitor monitor) throws CoreException{
		//copy ear root to the temporary assembly directory
		IPath parent =copyModule(fModule,monitor);
		IEnterpriseApplication earModule = (IEnterpriseApplication)fModule.loadAdapter(IEnterpriseApplication.class, monitor);
		IModule[] childModules = earModule.getModules();
		for (int i = 0; i < childModules.length; i++) {
			IModule module = childModules[i];
			String uri = earModule.getURI(module);
			if(uri==null){ //The bad memories of WTP 1.0
				IStatus status = new Status(IStatus.ERROR, CorePlugin.PLUGIN_ID, 0,	"unable to assemble module null uri",null ); //$NON-NLS-1$
				throw new CoreException(status);
			}
			IJ2EEModule jeeModule = (IJ2EEModule) module.loadAdapter(IJ2EEModule.class,monitor);
			if( jeeModule != null && jeeModule.isBinary() ){//Binary module just copy
				ProjectModule pm = (ProjectModule) module.loadAdapter(ProjectModule.class, null);
				IModuleResource[] resources = pm.members();
				// It's assumed here that the URI at least includes the name, and so removing 1 segment is safe
				publishHelper.publishFull(resources, parent.append(uri).removeLastSegments(1), monitor);
				continue;//done! no need to go further
			}
			if( shouldRepack( module ) ){	
			    packModule(module,uri, parent);
            }
		}
		return parent;
	}
	/**
     * Checks if the publish state of the child module has changed.
     * @param module
     * @return module changed
	 */
	private boolean shouldRepack( IModule module ) {
        final IModule[] modules ={fModule, module};
        boolean repack = (IServer.PUBLISH_STATE_NONE != fServer.getServer().getModulePublishState(modules));
        Trace.trace(Trace.FINEST, "EarModuleAssembler should repack returns "+ Boolean.toString(repack)+ " for module "+module);  //$NON-NLS-1$//$NON-NLS-2$
        return repack;
        
    }

    protected void packModule(IModule module, String deploymentUnitName, IPath destination) throws CoreException {
		if(module.getModuleType().getId().equals("jst.web")) //$NON-NLS-1$
		{
			AbstractModuleAssembler assembler= AbstractModuleAssembler.Factory.getModuleAssembler(module, fServer);
			IPath webAppPath = assembler.assemble(new NullProgressMonitor());
			String realDestination = destination.append(deploymentUnitName).toString();
			ModulePackager packager=null;
			try {
				packager =new ModulePackager(realDestination,false);
				packager.pack(webAppPath.toFile(),webAppPath.toOSString());
			} catch (IOException e) {
				IStatus status = new Status(IStatus.ERROR, CorePlugin.PLUGIN_ID, 0,
						"unable to assemble module", e); //$NON-NLS-1$
				throw new CoreException(status);
			}
			finally{
				if(packager!=null)
				{		
					try {
						packager.finished();
					} catch (IOException e) {
						// Unhandled
					}
				}
				
			}
		}
		else
		{
			super.packModule(module, deploymentUnitName, destination);
		}
	}
}