/***************************************************************************************************
 * Copyright (c) 2005 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;

import java.io.File;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.StringTokenizer;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jst.server.core.FacetUtil;
import org.eclipse.jst.server.core.IEnterpriseApplication;
import org.eclipse.jst.server.core.IWebModule;
import org.eclipse.jst.server.generic.servertype.definition.Module;
import org.eclipse.jst.server.generic.servertype.definition.Port;
import org.eclipse.jst.server.generic.servertype.definition.Property;
import org.eclipse.jst.server.generic.servertype.definition.ServerRuntime;
import org.eclipse.osgi.util.NLS;
import org.eclipse.wst.server.core.IModule;
import org.eclipse.wst.server.core.IModuleType;
import org.eclipse.wst.server.core.IServer;
import org.eclipse.wst.server.core.ServerPort;
import org.eclipse.wst.server.core.ServerUtil;
import org.eclipse.wst.server.core.model.IURLProvider;
import org.eclipse.wst.server.core.model.ServerDelegate;

/**
 * Generic XML based server implementation.
 * 
 * @author Gorkem Ercan
 */
public class GenericServer extends ServerDelegate implements IURLProvider {

	/**
	 * Property key for the custom build file. Selected by user.
	 */
	public static final String PROP_CUSTOM_BUILD_SCRIPT = CorePlugin.PLUGIN_ID+".custom_build_file"; //$NON-NLS-1$
	
    private static final String ATTR_GENERIC_SERVER_MODULES = "Generic_Server_Modules_List"; //$NON-NLS-1$

	public IStatus canModifyModules( IModule[] add, IModule[] remove ) {
        if( add != null )// remove is OK.
        {
            for( int i = 0; i < add.length; i++ )
            {
                if( !isSupportedModule( add[i] ) )
                {
                    return new Status( IStatus.ERROR, CorePlugin.PLUGIN_ID, 0,
                            GenericServerCoreMessages.moduleNotCompatible, null );
                }
                if( add[i].getProject() != null )
                {
                    IStatus status = FacetUtil.verifyFacets( add[i]
                            .getProject(), getServer() );
                    if( status != null && !status.isOK() )
                        return status;
                }
            }
        }
        return Status.OK_STATUS;
    }
	
    private boolean isSupportedModule(IModule module){
        if( module == null )
            return false;
        List moduleTypes = getServerDefinition().getModule();
        for( int j=0; j<moduleTypes.size(); j++ ){
             Module moduleDefinition = (Module)moduleTypes.get(j);
             if( module.getModuleType() != null && module.getModuleType().getId().equals(moduleDefinition.getType()) ){
                return true;
              }
        }
         return false;
    }
    
    /* (non-Javadoc)
     * @see org.eclipse.wst.server.core.model.ServerDelegate#modifyModules(org.eclipse.wst.server.core.IModule[], org.eclipse.wst.server.core.IModule[], org.eclipse.core.runtime.IProgressMonitor)
     */
    @SuppressWarnings("unchecked")
	public void modifyModules(IModule[] add, IModule[] remove, IProgressMonitor monitor) throws CoreException {
      
        List modules = this.getAttribute(ATTR_GENERIC_SERVER_MODULES,(List)null);
        
        if(add!=null&& add.length>0)
        {
            if(modules==null) {
               modules=new ArrayList(add.length);
            }
            for (int i = 0; i < add.length; i++) {
               
               if(modules.contains(add[i].getId())==false)
                    modules.add(add[i].getId());
            }
        }
        if(remove!=null && remove.length>0 && modules!=null)
        {
            for (int i = 0; i < remove.length; i++) {
                modules.remove(remove[i].getId());
             }
        }
        if(modules!=null)    
            setAttribute(ATTR_GENERIC_SERVER_MODULES,modules);
        
    }

 	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.wst.server.core.model.IServerDelegate#getChildModules(org.eclipse.wst.server.core.model.IModule[])
	 */
	public IModule[] getChildModules(IModule[] module) {
		if (module[0] != null && module[0].getModuleType() != null) {
			if (module.length == 1) {
				IModuleType moduleType = module[0].getModuleType();
				if (moduleType != null && "jst.ear".equals(moduleType.getId())) { //$NON-NLS-1$
					IEnterpriseApplication enterpriseApplication = (IEnterpriseApplication) module[0]
							.loadAdapter(IEnterpriseApplication.class, null);
					if (enterpriseApplication != null) {
						IModule[] earModules = enterpriseApplication.getModules(); 
						if ( earModules != null) {
							return earModules;
						}
					}
				}
				else if (moduleType != null && "jst.web".equals(moduleType.getId())) { //$NON-NLS-1$
					IWebModule webModule = (IWebModule) module[0].loadAdapter(IWebModule.class, null);
					if (webModule != null) {
						IModule[] modules = webModule.getModules();
						return modules;
					}
				}
			}
		}
		return new IModule[0];
	}

	/**
	 * Returns the server instance properties including runtime properties. 
	 * 
	 * @return server instance properties.
	 */
	@SuppressWarnings("unchecked")
	private Map getInstanceProperties() {
		Map runtimeProperties =getRuntimeDelegate().getServerInstanceProperties();
		Map serverProperties = getServerInstanceProperties();
		Map instanceProperties = new HashMap(runtimeProperties.size()+serverProperties.size());
		instanceProperties.putAll(runtimeProperties);
		instanceProperties.putAll(serverProperties);
		return instanceProperties;
	}
	
 	
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.wst.server.core.model.IMonitorableServer#getServerPorts()
	 */
	public org.eclipse.wst.server.core.ServerPort[] getServerPorts() {
		List<ServerPort> ports = new ArrayList<ServerPort>();
		Iterator pIter = this.getServerDefinition().getPort().iterator();
		while (pIter.hasNext()) {
			Port element = (Port) pIter.next();
			int port = Integer.parseInt(getServerDefinition().getResolver().resolveProperties(element.getNo()));
			ports.add(new ServerPort("server", element.getName(), port, element.getProtocol()));		 //$NON-NLS-1$
		}
	
		return ports.toArray(new org.eclipse.wst.server.core.ServerPort[ports.size()]);
	}


	/* (non-Javadoc)
	 * @see org.eclipse.wtp.server.core.model.IURLProvider#getModuleRootURL(org.eclipse.wtp.server.core.model.IModule)
	 */
	public URL getModuleRootURL(IModule module) {

		try {
            if (module == null || module.loadAdapter(IWebModule.class,null)==null )
				return null;
            
            IWebModule webModule =(IWebModule)module.loadAdapter(IWebModule.class,null);
            String host = getServer().getHost();
			String url = "http://"+host; //$NON-NLS-1$
			int port = 0;
			
			port = getHttpPort();
			port =ServerUtil.getMonitoredPort(getServer(), port, "web"); //$NON-NLS-1$
			if (port != 80)
				url += ":" + port; //$NON-NLS-1$

			String ctxRoot = webModule.getContextRoot();
			if(!ctxRoot.startsWith( "/" )){ //$NON-NLS-1$
			    url += '/';
			}
			url += webModule.getContextRoot();

			if (!url.endsWith("/")) //$NON-NLS-1$
				url += "/"; //$NON-NLS-1$

			return new URL(url);
		} catch (Exception e) {
			Trace.trace("Could not get root URL", e); //$NON-NLS-1$
			return null;
		}

	}

	/**
	 * Return http port
	 * @return port
	 */
	protected int getHttpPort() {
		int port=-1;
		Iterator pIter = this.getServerDefinition().getPort().iterator();
		while (pIter.hasNext()) {
			Port aPort = (Port) pIter.next();
			if(port== -1)
				port = Integer.parseInt(getServerDefinition().getResolver().resolveProperties(aPort.getNo()));
			else if( "http".equals(aPort.getProtocol() ) ) //$NON-NLS-1$
				port = Integer.parseInt(aPort.getNo());	
		}
		if( port == -1)
			port = 8080;
		return port;
	}

	/**
	 * Returns the ServerRuntime that represents the .serverdef
	 * file for this server. 
	 * @return server runtime
	 */
    public ServerRuntime getServerDefinition(){
        IServer server = getServer();
        if (server == null)
        {
        	throw new IllegalStateException("No server determeined. Server definition can not be determined without a server"); //$NON-NLS-1$
        }
        
        String rtTypeId=null;
        if ( server.getRuntime() != null &&
        		server.getRuntime().getRuntimeType() != null )
        {
        	rtTypeId = server.getRuntime().getRuntimeType().getId();
        }
		
        String serverTypeId = server.getServerType().getId();
        /**
         * Pass both the serverType id and runtimeType id and ServerTypeDefinitionManager 
         * will figure out how to give us back the correct ServerRuntime.
         */
		return CorePlugin.getDefault().getServerTypeDefinitionManager().getServerRuntimeDefinition(
                serverTypeId, rtTypeId, getInstanceProperties());
	}

    private GenericServerRuntime getRuntimeDelegate(){
    	return (GenericServerRuntime)getServer().getRuntime().loadAdapter(GenericServerRuntime.class,null);
     }


    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.wst.server.core.model.ServerDelegate#getRootModules(org.eclipse.wst.server.core.IModule)
     */
    public IModule[] getRootModules(IModule module) throws CoreException {
     	if ( !isSupportedModule( module ) )
            return null;
        IStatus status = canModifyModules(new IModule[] { module }, null);
        if (status != null && !status.isOK())
            throw  new CoreException(status);
        IModule[] parents = doGetParentModules(module);
        if(parents.length>0)
        	return parents;
        return new IModule[] { module };
    }


	private IModule[] doGetParentModules(IModule module) {
		IModule[] ears = ServerUtil.getModules("jst.ear"); //$NON-NLS-1$
		ArrayList<IModule> list = new ArrayList<IModule>();
		for (int i = 0; i < ears.length; i++) {
			IEnterpriseApplication ear = (IEnterpriseApplication)ears[i].loadAdapter(IEnterpriseApplication.class,null);
			IModule[] childs = ear.getModules();
			for (int j = 0; j < childs.length; j++) {
				if(childs[j].equals(module))
					list.add(ears[i]);
			}
		}
		return list.toArray(new IModule[list.size()]);
	}
	/**
	 * Returns the server properties.
	 * @return Map of properties.
	 */
    public Map getServerInstanceProperties() {
 		return getAttribute(GenericServerRuntime.SERVER_INSTANCE_PROPERTIES, new HashMap());
 	}
 	/**
 	 * Change the server instance properties.
 	 * 
 	 * @param map
 	 */
 	public void setServerInstanceProperties(Map map) {
 		setAttribute(GenericServerRuntime.SERVER_INSTANCE_PROPERTIES, map);
 	}
 	/**
 	 * Checks if the properties set for this server is valid. 
 	 * @return status
 	 */
 	public IStatus validate() {
 		List props = this.getServerDefinition().getProperty();
 		for(int i=0;i<props.size();i++)
 		{
 			Property property =(Property)props.get(i);
 			if(property.getType().equals(Property.TYPE_DIRECTORY) || property.getType().equals(Property.TYPE_FILE))
 			{
 				String path= (String)getInstanceProperties().get(property.getId());
 				if(path!=null && !pathExist(path))
 					return  new Status(IStatus.ERROR, CorePlugin.PLUGIN_ID, 0, NLS.bind(GenericServerCoreMessages.invalidPath,path), null);
 			}
 		}
 		return new Status(IStatus.OK, CorePlugin.PLUGIN_ID, 0, "", null); //$NON-NLS-1$
 	}
	private boolean pathExist(String path){
		File f = new File(path);
		return f.exists();
	}
 
	@SuppressWarnings("unchecked")
	public void setDefaults(IProgressMonitor monitor) {
		ServerRuntime serverRuntime =  this.getServerDefinition(); 
		// although a server should always have a serverdefinition in some cases 
		// the runtime is not created yet and serverdef can not be determined.
		if (serverRuntime == null ){
			return ;
		}
 		List props = this.getServerDefinition().getProperty();
 		Map instancePropsMap = new HashMap();
 		for (Iterator iter = props.iterator(); iter.hasNext();) {
			Property element = (Property) iter.next();
			if(Property.CONTEXT_SERVER.equalsIgnoreCase(element.getContext())) {
				//if the property type is this is a combo, parse the value and use the first token as the default
				if (Property.TYPE_SELECT.equals(element.getType()) ||
						Property.TYPE_SELECT_EDIT.equals(element.getType())) {
		    		StringTokenizer tokenizer = new StringTokenizer(element.getDefault(),","); //$NON-NLS-1$
		    		if (tokenizer.hasMoreTokens()) {
		    			String firstToken = tokenizer.nextToken();
		    			instancePropsMap.put(element.getId(), firstToken);
		    		}
				} else {
					//not a combo, so just pass through the default value
					instancePropsMap.put(element.getId(), element.getDefault());
				}
			}
		}
 		setServerInstanceProperties(instancePropsMap);
 	}
 	
}