/* Copyright (C) 2005-2010, 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 "OSInfo.h"
#include "Version.h"

#ifdef Q_WS_WIN
#include <intrin.h>
#endif

#ifdef Q_WS_X11
#include <sys/utsname.h>
#endif

#ifdef Q_WS_MAC
#include <sys/types.h>
#include <sys/sysctl.h>
#include <mach-o/arch.h>
#endif

QString OSInfo::getMacHash(const QList<QHostAddress> &qlBind) {
	QString first, second, third;
	foreach(const QNetworkInterface &qni, QNetworkInterface::allInterfaces()) {
		if (! qni.isValid())
			continue;
		if (qni.flags() & QNetworkInterface::IsLoopBack)
			continue;
		if (qni.hardwareAddress().isEmpty())
			continue;

		QString hash = QString::fromAscii(QCryptographicHash::hash(qni.hardwareAddress().toAscii(), QCryptographicHash::Sha1).toHex());

		if (third.isEmpty() || third > hash)
			third = hash;

		if (!(qni.flags() & (QNetworkInterface::IsUp | QNetworkInterface::IsRunning)))
			continue;

		if (second.isEmpty() || second > hash)
			second = hash;

		foreach(const QNetworkAddressEntry &qnae, qni.addressEntries()) {
			const QHostAddress &qha = qnae.ip();
			if (qlBind.isEmpty() || qlBind.contains(qha)) {
				if (first.isEmpty() || first > hash)
					first = hash;
			}
		}
	}
	if (! first.isEmpty())
		return first;
	if (! second.isEmpty())
		return second;
	if (! third.isEmpty())
		return third;
	return QString();
}

QString OSInfo::getOS() {
#if defined(Q_WS_WIN)
	return QLatin1String("Win");
#elif defined(Q_WS_MAC)
	return QLatin1String("OSX");
#else
	return QLatin1String("X11");
#endif
}

QString OSInfo::getOSVersion() {
	static QString qsCached;

	if (! qsCached.isNull())
		return qsCached.isEmpty() ? QString() : qsCached;

	QString os;

#if defined(Q_WS_WIN)
	OSVERSIONINFOEXW ovi;
	memset(&ovi, 0, sizeof(ovi));

	ovi.dwOSVersionInfoSize=sizeof(ovi);
	GetVersionEx(reinterpret_cast<OSVERSIONINFOW *>(&ovi));

	os.sprintf("%d.%d.%d.%d", ovi.dwMajorVersion, ovi.dwMinorVersion, ovi.dwBuildNumber, (ovi.wProductType == VER_NT_WORKSTATION) ? 1 : 0);
#elif defined(Q_OS_MAC)
	SInt32 major, minor, bugfix;
	OSErr err = Gestalt(gestaltSystemVersionMajor, &major);
	if (err == noErr)
		err = Gestalt(gestaltSystemVersionMinor, &minor);
	if (err == noErr)
		err = Gestalt(gestaltSystemVersionBugFix, &bugfix);
	if (err != noErr)
		return QString::number(QSysInfo::MacintoshVersion, 16);

	const NXArchInfo *local = NXGetLocalArchInfo();
	const NXArchInfo *ai = local ? NXGetArchInfoFromCpuType(local->cputype, CPU_SUBTYPE_MULTIPLE) : NULL;
	const char *arch = ai ? ai->name : "unknown";

	os.sprintf("%i.%i.%i (%s)", major, minor, bugfix, arch);
#else
#ifdef Q_OS_LINUX
	QProcess qp;
	QStringList args;
	args << QLatin1String("-s");
	args << QLatin1String("-d");
	qp.start(QLatin1String("lsb_release"), args);
	if (qp.waitForFinished(5000)) {
		os = QString::fromUtf8(qp.readAll()).simplified();
		if (os.startsWith(QLatin1Char('"')) && os.endsWith(QLatin1Char('"')))
			os = os.mid(1, os.length() - 2).trimmed();
	}
	if (os.isEmpty())
		qWarning("OSInfo: Failed to execute lsb_release");

	qp.terminate();
	if (! qp.waitForFinished(1000))
		qp.kill();
#endif
	if (os.isEmpty()) {
		struct utsname un;
		if (uname(&un) == 0) {
			os.sprintf("%s %s", un.sysname, un.release);
		}
	}
#endif

	if (! os.isNull())
		qsCached = os;
	else
		qsCached = QLatin1String("");

	return qsCached;
}

void OSInfo::fillXml(QDomDocument &doc, QDomElement &root, const QString &os, const QString &osver, const QList<QHostAddress> &qlBind) {
	QDomElement tag;
	QDomText t;
	bool bIs64;
	bool bSSE2 = false;
	QString cpu_id, cpu_extid;

	tag=doc.createElement(QLatin1String("machash"));
	root.appendChild(tag);
	t=doc.createTextNode(OSInfo::getMacHash(qlBind));
	tag.appendChild(t);

	tag=doc.createElement(QLatin1String("version"));
	root.appendChild(tag);
	t=doc.createTextNode(QLatin1String(MUMTEXT(MUMBLE_VERSION_STRING)));
	tag.appendChild(t);

	tag=doc.createElement(QLatin1String("release"));
	root.appendChild(tag);
	t=doc.createTextNode(QLatin1String(MUMBLE_RELEASE));
	tag.appendChild(t);

	tag=doc.createElement(QLatin1String("os"));
	root.appendChild(tag);
	t=doc.createTextNode(os);
	tag.appendChild(t);

	tag=doc.createElement(QLatin1String("osver"));
	root.appendChild(tag);
	t=doc.createTextNode(osver);
	tag.appendChild(t);

	tag=doc.createElement(QLatin1String("qt"));
	root.appendChild(tag);
	t=doc.createTextNode(QString::fromLatin1(qVersion()));
	tag.appendChild(t);

#if defined(Q_WS_WIN)
	BOOL bIsWow64 = FALSE;
	IsWow64Process(GetCurrentProcess(), &bIsWow64);
	bIs64 = bIsWow64;
#elif defined(Q_WS_MAC)
	size_t len = sizeof(bool);
	sysctlbyname("hw.cpu64bit_capable", &bIs64, &len, NULL, 0);
#else
	bIs64 = (QSysInfo::WordSize == 64);
#endif
	tag=doc.createElement(QLatin1String("is64bit"));
	root.appendChild(tag);
	t=doc.createTextNode(QString::number(bIs64 ? 1 : 0));
	tag.appendChild(t);

#if defined(Q_WS_WIN)
#define regstr(x) QString::fromLatin1(reinterpret_cast<const char *>(& x), 4)
	int chop;
	int cpuinfo[4];

	__cpuid(cpuinfo, 1);
	bSSE2 = (cpuinfo[3] & 0x04000000);

	__cpuid(cpuinfo, 0);

	cpu_id = regstr(cpuinfo[1]) + regstr(cpuinfo[3]) + regstr(cpuinfo[2]);

	for (unsigned int j=2; j<=4;++j) {
		__cpuid(cpuinfo, 0x80000000 + j);
		cpu_extid += regstr(cpuinfo[0]) + regstr(cpuinfo[1]) + regstr(cpuinfo[2]) + regstr(cpuinfo[3]);
	}

	cpu_id = cpu_id.trimmed();
	chop = cpu_id.indexOf(QLatin1Char('\0'));
	if (chop != -1)
		cpu_id.truncate(chop);

	cpu_extid = cpu_extid.trimmed();
	chop = cpu_extid.indexOf(QLatin1Char('\0'));
	if (chop != -1)
		cpu_extid.truncate(chop);
#endif

	tag=doc.createElement(QLatin1String("cpu_id"));
	root.appendChild(tag);
	t=doc.createTextNode(cpu_id);
	tag.appendChild(t);

	tag=doc.createElement(QLatin1String("cpu_extid"));
	root.appendChild(tag);
	t=doc.createTextNode(cpu_extid);
	tag.appendChild(t);

	tag=doc.createElement(QLatin1String("cpu_sse2"));
	root.appendChild(tag);
	t=doc.createTextNode(QString::number(bSSE2 ? 1 : 0));
	tag.appendChild(t);
}