/**
 * XMPP - libpurple transport
 *
 * Copyright (C) 2009, Jan Kaluza <hanzz@soc.pidgin.im>
 *
 * 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.
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301  USA
 */

#pragma once

#include <string>
#include <algorithm>
#include "Swiften/Elements/VCard.h"
#include "Swiften/Elements/Presence.h"

namespace Transport {

class RosterManager;
class User;

typedef enum { 	BUDDY_NO_FLAG = 0,
				BUDDY_JID_ESCAPING = 2,
				BUDDY_IGNORE = 4,
				BUDDY_BLOCKED = 8,
			} BuddyFlag;

/// Represents one legacy network Buddy.
class Buddy {
	public:
		typedef enum { 	Ask,
						Both,
					} Subscription;
		/// Constructor.

		/// \param rosterManager RosterManager associated with this buddy.
		/// \param id ID which identifies the buddy in database or -1 if it's new buddy which is
		/// not in database yet.
		Buddy(RosterManager *rosterManager, long id = -1, BuddyFlag flags = BUDDY_NO_FLAG);

		/// Destructor
		virtual ~Buddy();
		
		/// Sets unique ID used to identify this buddy by StorageBackend.
		
		/// This is set
		/// by RosterStorage class once the buddy is stored into database or when the
		/// buddy is loaded from database.
		/// You should not need to set this ID manually.
		/// \param id ID
		void setID(long id);

		/// Returns unique ID used to identify this buddy by StorageBackend.

		/// \return ID which identifies the buddy in database or -1 if it's new buddy which is
		/// not in database yet.
		long getID();

		/// Returns full JID of this buddy.

		/// \param hostname hostname used as domain in returned JID
		/// \return full JID of this buddy
		const Swift::JID &getJID();

		/// Generates whole Presennce stanza with current status/show for this buddy.

		/// Presence stanza does not containt "to" attribute, it has to be added manually.
		/// \param features features used in returned stanza
		/// \param only_new if True, this function returns Presence stanza only if it's different
		/// than the previously generated one.
		/// \return Presence stanza or NULL.
		std::vector<Swift::Presence::ref> &generatePresenceStanzas(int features, bool only_new = false);

		void setBlocked(bool block) {
			if (block)
				m_flags = (BuddyFlag) (m_flags | BUDDY_BLOCKED);
			else
				m_flags = (BuddyFlag) (m_flags & ~BUDDY_BLOCKED);
		}

		bool isBlocked() {
			return (m_flags & BUDDY_BLOCKED)  != 0;
		}

		/// Sets current subscription.

		/// \param subscription "to", "from", "both", "ask"
		void setSubscription(Subscription subscription);

		/// Returns current subscription

		/// \return subscription "to", "from", "both", "ask"
		Subscription getSubscription();

		/// Sets this buddy's flags.

		/// \param flags flags
		void setFlags(BuddyFlag flags);

		/// Returns this buddy's flags.

		/// \param flags flags
		BuddyFlag getFlags();

		/// Returns RosterManager associated with this buddy.

		/// \return RosterManager associated with this buddy.
		RosterManager *getRosterManager() { return m_rosterManager; }

		/// Returns legacy network username which does not contain unsafe characters,
		/// so it can be used in JIDs.
		std::string getSafeName();

		void sendPresence();

		void handleRawPresence(Swift::Presence::ref);

		/// Handles VCard from legacy network and forwards it to XMPP user.

		/// \param id ID used in IQ-result.
		/// \param vcard VCard which will be sent.
		void handleVCardReceived(const std::string &id, Swift::VCard::ref vcard);

		/// Returns legacy network username of this buddy. (for example UIN for ICQ, JID for Jabber, ...).

		/// \return legacy network username
		virtual std::string getName() = 0;

		/// Returns alias (nickname) of this buddy.

		/// \return alias (nickname)
		virtual std::string getAlias() = 0;

		/// Returns list of groups this buddy is in.

		/// \return groups
		virtual std::vector<std::string> getGroups() = 0;

		/// Returns current legacy network status and statuMessage of this buddy.

		/// \param status current status/show is stored here
		/// \param statusMessage current status message is stored here
		/// \return true if status was stored successfully
		virtual bool getStatus(Swift::StatusShow &status, std::string &statusMessage) = 0;

		/// Returns SHA-1 hash of buddy icon (avatar) or empty string if there is no avatar for this buddy.

		/// \return avatar hash or empty string.
		virtual std::string getIconHash() = 0;

		virtual bool isAvailable() = 0;

		/// Returns legacy name of buddy from JID.

		/// \param jid Jabber ID.
		/// \return legacy name of buddy from JID.
		static std::string JIDToLegacyName(const Swift::JID &jid, User *user = NULL);
		static Buddy *JIDToBuddy(const Swift::JID &jid, User *user);
		static BuddyFlag buddyFlagsFromJID(const Swift::JID &jid);

	protected:
		void generateJID();
		Swift::JID m_jid;
		std::vector<Swift::Presence::ref> m_presences;

	private:
		long m_id;
		BuddyFlag m_flags;
		RosterManager *m_rosterManager;
		Subscription m_subscription;
};

}