/*
    kopeteaccountmanager.h - Kopete Account Manager

    Copyright (c) 2002-2003 by Martijn Klingens      <klingens@kde.org>
    Copyright (c) 2003-2005 by Olivier Goffart       <ogoffart@kde.org>

    Kopete    (c) 2002-2007 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 __kopeteaccountmanager_h__
#define __kopeteaccountmanager_h__

#include <QtCore/QObject>
#include <QtGui/QColor>

#include "kopete_export.h"

#include "kopetestatusmessage.h"

namespace Kopete {

class Account;
class Plugin;
class Protocol;
class Contact;
class OnlineStatus;
class StatusMessage;

/**
 * AccountManager manages all defined accounts in Kopete. You can
 * query them and globally set them all online or offline from here.
 *
 * AccountManager is a singleton, you may uses it with @ref AccountManager::self()
 *
 * @author Martijn Klingens <klingens@kde.org>
 * @author Olivier Goffart <ogoffart\@kde.org>
 */
class KOPETE_EXPORT AccountManager : public QObject
{
	Q_OBJECT

public:
	/**
	 * \brief Retrieve the instance of AccountManager.
	 *
	 * The account manager is a singleton class of which only a single
	 * instance will exist. If no manager exists yet this function will
	 * create one for you.
	 *
	 * \return the instance of the AccountManager
	 */
	static AccountManager* self();

	~AccountManager();

	/**
	 * \brief Retrieve the list of accounts
	 * \return a list of all the accounts
	 */
	const QList<Account *> & accounts() const;

	/**
	 * \brief Retrieve a list of accounts per protocol
	 *
	 * Provides a list of accounts for a certain protocol. If there are
	 * no accounts for that protocol then the list is empty.
	 * \param protocol the protocol to get accounts for
	 * \return the list of accounts that belong to the @p protocol protocol
	 */
	QList<Account*> accounts( Kopete::Protocol* protocol ) const;

	/**
	 * \brief Return the account asked
	 * \param protocolId is the ID for the protocol
	 * \param accountId is the ID for the account you want
	 * \return the Account object found or NULL if no account was found
	 */
	Account* findAccount( const QString &protocolId, const QString &accountId );

	/**
	 * \brief Delete the account and clean the config data
	 *
	 * This is praticaly called by the account config page when you remove the account.
	 */
	void removeAccount( Account *account );

	/**
	 * \brief Guess the color for a new account
	 *
	 * Guesses a color for the next account of a given protocol based on the already registered colors
	 * \return the color guessed for the account
	 */
	QColor guessColor( Protocol *protocol ) const ;

	/**
	 * @brief Register the account.
	 *
	 * This adds the account in the manager's account list.
	 * It will check no accounts already exist with the same ID, if any, the account is deleted. and not added
	 *
	 * @return @p account, or 0L if the account was deleted because id collision
	 */
	Account *registerAccount( Account *account );


	/**
	 * Flag to be used in setOnlineStatus
	 *
	 * @c ConnectIfOffline : if set, this will connect offlines account with the status.
	 */
	enum SetOnlineStatusFlag { ConnectIfOffline=0x01 };


public slots:
	/**
	 * @brief Set all accounts a status in the specified category
	 *
	 * Account that are offline will not be connected, unless the ConnectIfOffline flag is set.
	 *
	 * @param category is one of the Kopete::OnlineStatusManager::Categories
	 * @param statusMessage is the new status message
	 * @param flags is a bitmask of SetOnlineStatusFlag
	 */
	void setOnlineStatus( /*Kopete::OnlineStatusManager::Categories*/ uint category,
	                      const Kopete::StatusMessage &statusMessage = Kopete::StatusMessage(), uint flags=0);

	/**
	 * @brief Set the given status message for all online accounts
	 *
	 * @param message Status message to set
	 */
	void setStatusMessage(const QString &message);

	/**
	 * \internal
	 * Save the account data to KConfig
	 */
	void save();

	/**
	 * \internal
	 * Load the account data from KConfig
	 */
	void load();



signals:
	/**
	 * \brief Signals when an account is ready for use
	 */
	void accountRegistered( Kopete::Account *account );

	/**
	 * \brief Signals when an account has been unregistered
	 *
	 * At this state, we are already in the Account destructor.
	 */
	void accountUnregistered( const Kopete::Account *account );

	/**
	 * \brief An account has changed its onlinestatus
	 * Technically this monitors Account::myself() onlinestatus changes
	 * \param account Account which changed its onlinestatus
	 * \param oldStatus The online status before the change
	 * \param newStatus The new online status
	 */
	void accountOnlineStatusChanged(Kopete::Account *account,
		const Kopete::OnlineStatus &oldStatus, const Kopete::OnlineStatus &newStatus);

private:
	/**
	 * Private constructor, because we're a singleton
	 */
	AccountManager();

private slots:
    /**
     * Try to connect every account that should be connected automatically
     */
    void networkConnected();
    /**
     * Disconnect everything
     */
    void networkDisconnected();

	void slotPluginLoaded( Kopete::Plugin *plugin );
	void slotAccountOnlineStatusChanged(Kopete::Contact *c,
		const Kopete::OnlineStatus &oldStatus, const Kopete::OnlineStatus &newStatus);

	/**
	 * \internal
	 * Unregister the account.
	 */
	void unregisterAccount( const Kopete::Account *account );

	void removeAccountConnectedChanged();

	/**
	 * Remove account and its contacts.
	 */
	void removeAccountInternal();

private:
	bool isAnyAccountConnected() const;
	static AccountManager *s_self;
	class Private;
	Private * const d;
};

} //END namespace Kopete


#endif


