/** 
 * @file llfloaterabout.cpp
 * @author James Cook
 * @brief The about box from Help->About
 *
 * $LicenseInfo:firstyear=2001&license=viewergpl$
 * 
 * Copyright (c) 2001-2009, Linden Research, Inc.
 * 
 * Second Life Viewer Source Code
 * The source code in this file ("Source Code") is provided by Linden Lab
 * to you under the terms of the GNU General Public License, version 2.0
 * ("GPL"), unless you have obtained a separate licensing agreement
 * ("Other License"), formally executed by you and Linden Lab.  Terms of
 * the GPL can be found in doc/GPL-license.txt in this distribution, or
 * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
 * 
 * There are special exceptions to the terms and conditions of the GPL as
 * it is applied to this Source Code. View the full text of the exception
 * in the file doc/FLOSS-exception.txt in this software distribution, or
 * online at http://secondlifegrid.net/programs/open_source/licensing/flossexception
 * 
 * By copying, modifying or distributing this software, you acknowledge
 * that you have read and understood your obligations described above,
 * and agree to abide by those obligations.
 * 
 * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
 * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
 * COMPLETENESS OR PERFORMANCE.
 * $/LicenseInfo$
 */
 
#include "llviewerprecompiledheaders.h"

#include "llfloaterabout.h"

#include "llsys.h"
#include "llgl.h"
#include "llui.h"	// for tr()
#include "v3dmath.h"

#include "llcurl.h"
#include "llimagej2c.h"
#include "audioengine.h"

#include "llviewertexteditor.h"
#include "llviewercontrol.h"
#include "llagent.h"
#include "llviewerstats.h"
#include "llviewerregion.h"
#include "llversionviewer.h"
#include "llviewerbuild.h"
#include "lluictrlfactory.h"
#include "lluri.h"
#include "llweb.h"
#include "llsecondlifeurls.h"
#include "lltrans.h"
#include "llappviewer.h" 
#include "llglheaders.h"
#include "llmediamanager.h"


extern LLCPUInfo gSysCPU;
extern LLMemoryInfo gSysMemory;
extern U32 gPacketsIn;

///----------------------------------------------------------------------------
/// Local function declarations, constants, enums, and typedefs
///----------------------------------------------------------------------------

LLFloaterAbout* LLFloaterAbout::sInstance = NULL;

static std::string get_viewer_release_notes_url();

///----------------------------------------------------------------------------
/// Class LLFloaterAbout
///----------------------------------------------------------------------------

// Default constructor
LLFloaterAbout::LLFloaterAbout() 
:	LLFloater(std::string("floater_about"), std::string("FloaterAboutRect"), LLStringUtil::null)
{
	LLUICtrlFactory::getInstance()->buildFloater(this, "floater_about.xml");

	// Support for changing product name.
	std::string title("About ");
	title += LLAppViewer::instance()->getSecondLifeTitle();
	setTitle(title);

	LLViewerTextEditor *support_widget = 
		getChild<LLViewerTextEditor>("support_editor", true);

	LLViewerTextEditor *credits_widget = 
		getChild<LLViewerTextEditor>("credits_editor", true);


	if (!support_widget || !credits_widget)
	{
		return;
	}

	// For some reason, adding style doesn't work unless this is true.
	support_widget->setParseHTML(TRUE);

	// Text styles for release notes hyperlinks
	LLStyleSP viewer_link_style(new LLStyle);
	viewer_link_style->setVisible(true);
	viewer_link_style->setFontName(LLStringUtil::null);
	viewer_link_style->setLinkHREF(get_viewer_release_notes_url());
	viewer_link_style->setColor(gSavedSettings.getColor4("HTMLLinkColor"));

	// Version string
	std::string version = llformat(
	  "%s %d.%d.%d %s / %s %d.%d.%d (%d), %s %s\n",
		IMP_VIEWER_NAME,
	  IMP_VERSION_MAJOR, IMP_VERSION_MINOR, IMP_VERSION_PATCH, IMP_VERSION_TEST,
		LL_VIEWER_NAME,
	  LL_VERSION_MAJOR, LL_VERSION_MINOR, LL_VERSION_PATCH, LL_VIEWER_BUILD,
	  __DATE__, __TIME__);

	support_widget->appendColoredText(version, FALSE, FALSE, gColors.getColor("TextFgReadOnlyColor"));
	support_widget->appendStyledText(LLTrans::getString("ReleaseNotes"), FALSE, FALSE, &viewer_link_style);

	std::string support;
	support.append("\n\n");

	// Position
	LLViewerRegion* region = gAgent.getRegion();
	if (region)
	{
		LLStyleSP server_link_style(new LLStyle);
		server_link_style->setVisible(true);
		server_link_style->setFontName(LLStringUtil::null);
		server_link_style->setLinkHREF(region->getCapability("ServerReleaseNotes"));
		server_link_style->setColor(gSavedSettings.getColor4("HTMLLinkColor"));

		const LLVector3d &pos = gAgent.getPositionGlobal();
		LLUIString pos_text = getString("you_are_at");
		pos_text.setArg("[POSITION]",
						llformat("%.1f, %.1f, %.1f ", pos.mdV[VX], pos.mdV[VY], pos.mdV[VZ]));
		support.append(pos_text);

		std::string region_text = llformat("in %s located at ",
										gAgent.getRegion()->getName().c_str());
		support.append(region_text);

		std::string buffer;
		buffer = gAgent.getRegion()->getHost().getHostName();
		support.append(buffer);
		support.append(" (");
		buffer = gAgent.getRegion()->getHost().getString();
		support.append(buffer);
		support.append(")\n");
		support.append(gLastVersionChannel);
		support.append("\n");

		support_widget->appendColoredText(support, FALSE, FALSE, gColors.getColor("TextFgReadOnlyColor"));
		support_widget->appendStyledText(LLTrans::getString("ReleaseNotes"), FALSE, FALSE, &server_link_style);

		support = "\n\n";
	}

	// *NOTE: Do not translate text like GPU, Graphics Card, etc -
	//  Most PC users that know what these mean will be used to the english versions,
	//  and this info sometimes gets sent to support
	
	// CPU
	support.append("CPU: ");
	support.append( gSysCPU.getCPUString() );
	support.append("\n");

	U32 memory = gSysMemory.getPhysicalMemoryKB() / 1024;
	// Moved hack adjustment to Windows memory size into llsys.cpp

	std::string mem_text = llformat("Memory: %u MB\n", memory );
	support.append(mem_text);

	support.append("OS Version: ");
	support.append( LLAppViewer::instance()->getOSInfo().getOSString() );
	support.append("\n");

	support.append("Graphics Card Vendor: ");
	support.append( (const char*) glGetString(GL_VENDOR) );
	support.append("\n");

	support.append("Graphics Card: ");
	support.append( (const char*) glGetString(GL_RENDERER) );
	support.append("\n");

	support.append("OpenGL Version: ");
	support.append( (const char*) glGetString(GL_VERSION) );
	support.append("\n");

	support.append("\n");

	support.append("libcurl Version: ");
	support.append( LLCurl::getVersionString() );
	support.append("\n");

	support.append("J2C Decoder Version: ");
	support.append( LLImageJ2C::getEngineInfo() );
	support.append("\n");

	support.append("Audio Driver Version: ");
	bool want_fullname = true;
	support.append( gAudiop ? gAudiop->getDriverName(want_fullname) : "(none)" );

	support.append("\n");

	LLMediaManager *mgr = LLMediaManager::getInstance();
	if (mgr)
	{
		LLMediaBase *gstreamer = mgr->createSourceFromMimeType("http", "audio/mpeg");
		if (gstreamer)
		{
			support.append("GStreamer Version: ");
			support.append( gstreamer->getVersion() );
			support.append("\n");
		} 

		LLMediaBase *media_source = mgr->createSourceFromMimeType("http", "text/html");
		if (media_source)
		{
			support.append("LLMozLib Version: ");
			support.append(media_source->getVersion());
			support.append("\n");
			mgr->destroySource(media_source);
		}
	}

	if (gPacketsIn > 0)
	{
		std::string packet_loss = llformat("Packets Lost: %.0f/%.0f (%.1f%%)", 
			LLViewerStats::getInstance()->mPacketsLostStat.getCurrent(),
			F32(gPacketsIn),
			100.f*LLViewerStats::getInstance()->mPacketsLostStat.getCurrent() / F32(gPacketsIn) );
		support.append(packet_loss);
		support.append("\n");
	}

	support_widget->appendColoredText(support, FALSE, FALSE, gColors.getColor("TextFgReadOnlyColor"));

	// Fix views
	support_widget->setCursorPos(0);
	support_widget->setEnabled(FALSE);
	support_widget->setTakesFocus(TRUE);
	support_widget->setHandleEditKeysDirectly(TRUE);

	credits_widget->setCursorPos(0);
	credits_widget->setEnabled(FALSE);
	credits_widget->setTakesFocus(TRUE);
	credits_widget->setHandleEditKeysDirectly(TRUE);

	center();

	sInstance = this;
}

// Destroys the object
LLFloaterAbout::~LLFloaterAbout()
{
	sInstance = NULL;
}

// static
void LLFloaterAbout::show(void*)
{
	if (!sInstance)
	{
		sInstance = new LLFloaterAbout();
	}

	sInstance->open();	 /*Flawfinder: ignore*/
}


static std::string get_viewer_release_notes_url()
{
	std::ostringstream version;
	version << IMP_VERSION_MAJOR << "."
	        << IMP_VERSION_MINOR << "."
	        << IMP_VERSION_PATCH;

	// Append the test version if it's not empty
	if( strcmp(IMP_VERSION_TEST, "") != 0 )
		version << "-" << IMP_VERSION_TEST;

	std::ostringstream url;
	url << RELEASE_NOTES_BASE_URL << version.str();

	return url.str();
}