/*
    kopetecommand.h - Command

    Copyright (c) 2003      by Jason Keirstead       <jason@keirstead.org>
    Copyright (c) 2005      by Michel Hermier        <michel.hermier@wanadoo.fr>
    Kopete    (c) 2002-2005 by the Kopete developers <kopete-devel@kde.org>

   *************************************************************************
    *                                                                       *
    * This library is free software; you can redistribute it and/or         *
    * modify it under the terms of the GNU Lesser General Public            *
    * License as published by the Free Software Foundation; either          *
    * version 2 of the License, or (at your option) any later version.      *
    *                                                                       *
    *************************************************************************
*/

#ifndef KOPETECOMMAND_H
#define KOPETECOMMAND_H

#include <QtCore/QObject>

#include <kaction.h>
#include "kopetecommandhandler.h"

namespace Kopete
{

class ChatSession;

class Command
	: public KAction
{
	Q_OBJECT

public:
	/**
	 * an enum defining the type of a command
	 */
	typedef enum Type
	{
		Normal	= 0,
		System	= 1 << 1, // Not removable command
		Alias	= 1 << 2  // Is an alias
//		Undefined
	} Type;
	Q_DECLARE_FLAGS(Types, Type)

	/**
	 * Creates a Kopete::Command object
	 *
	 * @param parent The plugin who owns this command
	 * @param command The command we want to handle, not including the '/'
	 * @param handlerSlot The slot used to handle the command. This slot must
	 *   accept two parameters, a QString of arguments, and a Kopete::ChatSession
	 *   pointer to the Manager under which the command was sent.
	 * @param help An optional help string to be shown when the user uses
	 *   /help <i>command</i>
	 * @param type If this command is an alias, and what type
	 * @param formatString The formatString of the alias if any
	 * @param minArgs Minimum number of arguments
	 * @param maxArgs Maximum number of arguments
	 * @param cut The shortcut for the command
	 * @param pix The icon to use for the command
	 */
	 Command( QObject *parent, const QString &command, const char* handlerSlot,
	 	const QString &help = QString(), CommandHandler::CommandType type = CommandHandler::Normal, const QString &formatString = QString(),
		uint minArgs = 0, int maxArgs = -1, const KShortcut &cut = KShortcut(),
		const QString &pix = QString() );
	~Command();

	/**
	 * Process this command
	 */
	void processCommand( const QString &args, ChatSession *manager, bool gui = false );

	/**
	 * Returns the command this object handles
	 */
	 const QString &command() const { return m_command; }

	 /**
	  * Returns the help string for this command
	  */
	 const QString &help() const { return m_help; }

	 /**
	  * Returns the type of the command
	  */
	 CommandHandler::CommandType type() const { return m_type; }

signals:
	/**
	 * Emitted whenever a command is handled by this object. When a command
	 * has been handled, all processing on it stops by the command handler
	 * (a command cannot be handled twice)
	 */
	void handleCommand( const QString &args, Kopete::ChatSession *manager );

private slots:
	/**
	 * Connected to our activated() signal
	 */
	void slotAction();

private:
	void init( const QString &command, const char* slot, const QString &help,
		CommandHandler::CommandType type, const QString &formatString,
		uint minArgs, int maxArgs );

	void printError( const QString &error, ChatSession *manager, bool gui = false ) const;

	QString m_command;
	QString m_help;
	QString m_formatString;
	int m_minArgs;
	int m_maxArgs;
	bool m_processing;
	CommandHandler::CommandType m_type;

	class Private;
	Private * const d;
};

}

Q_DECLARE_OPERATORS_FOR_FLAGS(Kopete::Command::Types)

#endif