/* Copyright (C) 2005-2011, Thorvald Natvig <thorvald@natvig.com>

   All rights reserved.

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:

   - Redistributions of source code must retain the above copyright notice,
     this list of conditions and the following disclaimer.
   - Redistributions in binary form must reproduce the above copyright notice,
     this list of conditions and the following disclaimer in the documentation
     and/or other materials provided with the distribution.
   - Neither the name of the Mumble Developers nor the names of its
     contributors may be used to endorse or promote products derived from this
     software without specific prior written permission.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include "mumble_pch.hpp"

#include "ClientUser.h"

#include "Channel.h"
#include "Global.h"
#include "AudioOutput.h"

QHash<unsigned int, ClientUser *> ClientUser::c_qmUsers;
QReadWriteLock ClientUser::c_qrwlUsers;

QList<ClientUser *> ClientUser::c_qlTalking;
QReadWriteLock ClientUser::c_qrwlTalking;

ClientUser::ClientUser(QObject *p) : QObject(p),
		tsState(Settings::Passive),
		tLastTalkStateChange(false),
		bLocalIgnore(false),
		bLocalMute(false),
		fPowerMin(0.0f),
		fPowerMax(0.0f),
		fAverageAvailable(0.0f),
		fLocalVolume(1.0f),
		iFrames(0),
		iSequence(0) {
}

ClientUser *ClientUser::get(unsigned int uiSession) {
	QReadLocker lock(&c_qrwlUsers);
	ClientUser *p = c_qmUsers.value(uiSession);
	return p;
}

QList<ClientUser *> ClientUser::getTalking() {
	QReadLocker lock(&c_qrwlTalking);
	return c_qlTalking;
}

QList<ClientUser *> ClientUser::getActive() {
	QReadLocker lock(&c_qrwlUsers);
	QList<ClientUser *> activeUsers;
	foreach(ClientUser *cu, c_qmUsers) {
		if (cu->isActive())
			activeUsers << cu;
	}
	return activeUsers;
}

bool ClientUser::isValid(unsigned int uiSession) {
	QReadLocker lock(&c_qrwlUsers);

	return c_qmUsers.contains(uiSession);
}

ClientUser *ClientUser::add(unsigned int uiSession, QObject *po) {
	QWriteLocker lock(&c_qrwlUsers);

	ClientUser *p = new ClientUser(po);
	p->uiSession = uiSession;
	c_qmUsers[uiSession] = p;
	return p;
}

ClientUser *ClientUser::match(const ClientUser *other, bool matchname) {
	QReadLocker lock(&c_qrwlUsers);

	ClientUser *p;
	foreach(p, c_qmUsers) {
		if (p == other)
			continue;
		if ((p->iId >= 0) && (p->iId == other->iId))
			return p;
		if (matchname && (p->qsName == other->qsName))
			return p;
	}
	return NULL;
}

void ClientUser::remove(unsigned int uiSession) {
	QWriteLocker lock(&c_qrwlUsers);
	ClientUser *p = c_qmUsers.take(uiSession);
	if (p) {
		if (p->cChannel)
			p->cChannel->removeUser(p);

		AudioOutputPtr ao = g.ao;
		if (ao)
			ao->removeBuffer(p);

		if (p->tsState != Settings::Passive) {
			QWriteLocker writeLock(&c_qrwlTalking);
			c_qlTalking.removeAll(p);
		}
	}
}

void ClientUser::remove(ClientUser *p) {
	remove(p->uiSession);
}

QString ClientUser::getFlagsString() const {
	QStringList flags;

	if (! qsFriendName.isEmpty())
		flags << ClientUser::tr("Friend");
	if (iId >= 0)
		flags << ClientUser::tr("Authenticated");
	if (bPrioritySpeaker)
		flags << ClientUser::tr("Priority speaker");
	if (bRecording)
		flags << ClientUser::tr("Recording");
	if (bMute)
		flags << ClientUser::tr("Muted (server)");
	if (bDeaf)
		flags << ClientUser::tr("Deafened (server)");
	if (bLocalIgnore)
		flags << ClientUser::tr("Local Ignore (Text messages)");
	if (bLocalMute)
		flags << ClientUser::tr("Local Mute");
	if (bSelfMute)
		flags << ClientUser::tr("Muted (self)");
	if (bSelfDeaf)
		flags << ClientUser::tr("Deafened (self)");

	return flags.join(QLatin1String(", "));
}

void ClientUser::setTalking(Settings::TalkState ts) {
	if (tsState == ts)
		return;

	bool nstate = false;
	if (ts == Settings::Passive)
		nstate = true;
	else if (tsState == Settings::Passive)
		nstate = true;

	tsState = ts;
	tLastTalkStateChange.restart();
	emit talkingStateChanged();

	if (nstate && cChannel) {
		QWriteLocker lock(&c_qrwlTalking);
		if (ts == Settings::Passive)
			c_qlTalking.removeAll(this);
		else
			c_qlTalking << this;
	}
}

void ClientUser::setMute(bool mute) {
	if (bMute == mute)
		return;
	bMute = mute;
	if (! bMute)
		bDeaf = false;
	emit muteDeafStateChanged();
}

void ClientUser::setSuppress(bool suppress) {
	if (bSuppress == suppress)
		return;
	bSuppress = suppress;
	emit muteDeafStateChanged();
}

void ClientUser::setLocalIgnore(bool ignore) {
	if (bLocalIgnore == ignore)
		return;
	bLocalIgnore = ignore;
	emit muteDeafStateChanged();
}

void ClientUser::setLocalMute(bool mute) {
	if (bLocalMute == mute)
		return;
	bLocalMute = mute;
	emit muteDeafStateChanged();
}

void ClientUser::setDeaf(bool deaf) {
	bDeaf = deaf;
	if (bDeaf)
		bMute = true;
	emit muteDeafStateChanged();
}

void ClientUser::setSelfMute(bool mute) {
	bSelfMute = mute;
	if (! mute)
		bSelfDeaf = false;
	emit muteDeafStateChanged();
}

void ClientUser::setSelfDeaf(bool deaf) {
	bSelfDeaf = deaf;
	if (deaf)
		bSelfMute = true;
	emit muteDeafStateChanged();
}

void ClientUser::setPrioritySpeaker(bool priority) {
	if (bPrioritySpeaker == priority)
		return;
	bPrioritySpeaker = priority;
	emit prioritySpeakerStateChanged();
}

void ClientUser::setRecording(bool recording) {
	if (bRecording == recording)
		return;
	bRecording = recording;
	emit recordingStateChanged();
}

bool ClientUser::lessThanOverlay(const ClientUser *first, const ClientUser *second) {
	if (g.s.os.osSort == OverlaySettings::LastStateChange) {
		// Talkers above non-talkers
		if (first->tsState != Settings::Passive && second->tsState == Settings::Passive)
			return true;
		if (first->tsState == Settings::Passive && second->tsState != Settings::Passive)
			return false;

		// Valid time above invalid time (possible when there wasn't a state-change yet)
		if (first->tLastTalkStateChange.isStarted() && !second->tLastTalkStateChange.isStarted())
			return true;
		if (!first->tLastTalkStateChange.isStarted() && second->tLastTalkStateChange.isStarted())
			return false;

		// If both have a valid time
		if (first->tLastTalkStateChange.isStarted() && second->tLastTalkStateChange.isStarted()) {
			// Among talkers, long > short
			// (if two clients are talking, the client that started first is above the other)
			if (first->tsState != Settings::Passive && second->tsState != Settings::Passive)
				return first->tLastTalkStateChange > second->tLastTalkStateChange;

			// Among non-talkers, short -> long
			// (if two clients are passive, the client that most recently stopped talking is above)
			if (first->tsState == Settings::Passive && second->tsState == Settings::Passive)
				return first->tLastTalkStateChange < second->tLastTalkStateChange;
		}

		// If both times are invalid, fall back to alphabetically (continuing below)
	}

	if (first->cChannel == second->cChannel || first->cChannel == NULL || second->cChannel == NULL)
		return lessThan(first, second);

	// When sorting for the overlay always place the local users
	// channel above the others
	ClientUser *self = c_qmUsers.value(g.uiSession);
	if (self) {
		if (self->cChannel == first->cChannel)
			return true;
		else if (self->cChannel == second->cChannel)
			return false;
	}

	return Channel::lessThan(first->cChannel, second->cChannel);
}

void ClientUser::sortUsersOverlay(QList<ClientUser *> &list) {
	QReadLocker lock(&c_qrwlUsers);

	qSort(list.begin(), list.end(), ClientUser::lessThanOverlay);
}

bool ClientUser::isActive() {
	if (tsState != Settings::Passive)
		return true;

	if (!tLastTalkStateChange.isStarted())
		return false;

	return tLastTalkStateChange.elapsed() < g.s.os.uiActiveTime * 1000000U;
}

/* From Channel.h
 */
void Channel::addClientUser(ClientUser *p) {
	addUser(p);
	p->setParent(this);
}

QDataStream &operator<<(QDataStream &qds, const ClientUser::JitterRecord &jr) {
	qds << static_cast<qint8>(qBound(-128, jr.iSequence, 127));
	qds << static_cast<qint8>(qBound(-128, jr.iFrames, 127));
	qds << static_cast<quint32>(qMin(4294967295ULL, jr.uiElapsed));
	return qds;
}
