/*
 * File    : PluginManager.java
 * Created : 14-Dec-2003
 * By      : parg
 * 
 * Azureus - a Java Bittorrent client
 *
 * 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 2 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 ( see the LICENSE file ).
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package org.gudy.azureus2.plugins;

import java.util.List;
import java.util.Properties;

import org.gudy.azureus2.pluginsimpl.local.*;
import org.gudy.azureus2.plugins.installer.*;

/**
 * This class allows Azureus to be started as an embedded component and also allows plugins to
 * be dynamically registered
 * @author parg
 */


public abstract class 
PluginManager
{
  /**
   * No user interface
   *
   * @since 2.0.8.0
   */  
	public static final int	UI_NONE		= 0;
  /**
   * SWT user inferface
   *
   * @since 2.0.6.0
   */  
	public static final int	UI_SWT		= 1;
	

  /**
   * Property Key: Allow multiple instances.
   * Normally Azureus will only permit a single instance to run per machine.
   * Values for this key are: "true" or "false"
   *
   * @since 2.0.7.0
   */  
	public static final String	PR_MULTI_INSTANCE	= "MULTI_INSTANCE";
	
	/**
	 * Where the azureus config (i.e. per-user type) state is stored
	 * String value
	 * @since 4.9.0.1
	 */
	
	public static final String	PR_USER_DIRECTORY	= "USER_DIR";
	
	/**
	 * Where azureus is 'installed'. For embedded use you probably want to set config and app
	 * dir to a shared per-user location
	 * String value
	 * @since 4.9.0.1
	 */
	
	public static final String	PR_APP_DIRECTORY	= "APP_DIR";

	/**
	 * Parent folder that contains the downloads directory
	 * String value
	 * @since 4.9.0.1
	 */
	
	public static final String	PR_DOC_DIRECTORY	= "DOC_DIR";

	/**
	 * Set this to "true" (String) if you want to disable any native platform support
	 * String value
	 * @since 4.9.0.1
	 */
	
	public static final String	PR_DISABLE_NATIVE_SUPPORT	= "DISABLE_NATIVE";

	
	public static PluginManagerDefaults
	getDefaults()
	{
		return( PluginManagerDefaultsImpl.getSingleton());
	}
	
  /**
   * Runs Azureus
   * @param ui_type Type of user interface to provide.  See UI_* Constants
   * @param properties A list of properties to pass Azureus.  See PR_* constants.
   *
   * @since 2.0.6.0
   */  
	public static PluginManager
	startAzureus(
		int			ui_type,
		Properties	properties )
	{
		return( PluginManagerImpl.startAzureus( ui_type, properties ));
	}
	
  /**
   * Shuts down Azureus
   * @throws PluginException
   *
   * @since 2.0.8.0
   */  
	public static void
	stopAzureus()
	
		throws PluginException
	{
		PluginManagerImpl.stopAzureus();
	}
	
	/**
	 * restarts azureus and performs any Update actions defined via the plugin "update"
	 * interface. Currently only works for SWT UIs.
	 * @throws PluginException
   *
   * @since 2.1.0.0
	 */
	
	public static void
	restartAzureus()
	
		throws PluginException
	{
		PluginManagerImpl.restartAzureus();
	}
	
	/**
	 * Programatic plugin registration interface
	 * @param plugin_class	this must implement Plugin
   *
   * @since 2.0.6.0
	 */
	
	public static void
	registerPlugin(
		Class		plugin_class )
	{
		PluginManagerImpl.registerPlugin( plugin_class );
	}

	public static void
	registerPlugin(
		Plugin		plugin,
		String		id )
	{
		PluginManagerImpl.registerPlugin( plugin, id );
	}
	
	/**
	 * Returns the plugin interface with a given id, or <tt>null</tt> if not found.
	 * 
	 * @param id
	 * @param operational If <tt>true</tt>, only return a PluginInterface if the plugin
	 *   is operational (i.e. is running).
     * @since 3.1.1.1
	 */
	public abstract PluginInterface getPluginInterfaceByID(String id, boolean operational);

	/**
	 * Returns the plugin interface with a given class name, or <tt>null</tt> if not found.
	 * 
	 * @param class_name
	 * @param operational If <tt>true</tt>, only return a PluginInterface if the plugin
	 *   is operational (i.e. is running).
     * @since 3.1.1.1
	 */
	public abstract PluginInterface getPluginInterfaceByClass(String class_name, boolean operational);

	/**
	 * Returns the plugin interface with a given class, or <tt>null</tt> if not found.
	 * 
	 * @param class_object
	 * @param operational If <tt>true</tt>, only return a PluginInterface if the plugin
	 *   is operational (i.e. is running).
     * @since 3.1.1.1
	 */
	public abstract PluginInterface getPluginInterfaceByClass(Class class_object, boolean operational);

	/**
	 * Gets the current set of registered plugins. During initialisation this will probably give partial
	 * results as plugin initialisation is non-deterministic.
	 * @return
   *
   * @since 2.1.0.0
	 */
	
	public abstract PluginInterface[]
	getPluginInterfaces();

	
	/**
	 * returns the default plugin interface that can be used to access plugin functionality without an
	 * explicit plugin
	 * @return	null if unavailable 
	 */
	
	public abstract PluginInterface
	getDefaultPluginInterface();
	
	/**
	 * Gets the current set of registered plugins. During initialisation this will probably give partial
	 * results as plugin initialisation is non-deterministic.
	 * @return
   *
   * @since 2.1.0.0
	 */
	
	public abstract PluginInterface[]
	getPlugins();
	
	public abstract PluginInterface[]
	getPlugins(
		boolean	expect_partial_result );

	public abstract void
	firePluginEvent(
		int		event_type );
	
	public abstract PluginInstaller
	getPluginInstaller();

	public final void refreshPluginList() {
		refreshPluginList(true);
	}
	
	/**
	 * @since 3.1.1.1
	 */
	public abstract void refreshPluginList(boolean initialise);
	
	public abstract boolean
	isSilentRestartEnabled();

	public abstract boolean
	isInitialized();
	
	/**
	 * returns the plugin interface with a given id, or null if not found
	 * @param id
	 * @return
   *
   * @since 2.1.0.0
	 */
	
	public abstract PluginInterface
	getPluginInterfaceByID(
		String		id );

	
	/**
   *
   * @since 2.1.0.0
   */
	
	public abstract PluginInterface
	getPluginInterfaceByClass(
		String		class_name  );

	public abstract PluginInterface
	getPluginInterfaceByClass(
		Class		c );

	/**
	 * *since 5201
	 */
	
	public abstract List<PluginInterface>
	getPluginsWithMethod(
		String		name,
		Class<?>[]	parameters );
}
