/** 
 * @file llfloaterabout.cpp
 * @author James Cook
 * @brief The about box from Help->About
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * 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;
 * version 2.1 of the License only.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */
 
#include "llviewerprecompiledheaders.h"
#include <iostream>
#include <fstream>

#include "llfloaterabout.h"

// Viewer includes
#include "llagent.h"
#include "llagentui.h"
#include "llappviewer.h" 
#include "llsecondlifeurls.h"
#include "llslurl.h"
#include "llvoiceclient.h"
#include "lluictrlfactory.h"
#include "llviewertexteditor.h"
#include "llviewercontrol.h"
#include "llviewerstats.h"
#include "llviewerregion.h"
#include "llversioninfo.h"
#include "llweb.h"

// Linden library includes
#include "llaudioengine.h"
#include "llbutton.h"
#include "llcurl.h"
#include "llglheaders.h"
#include "llfloater.h"
#include "llfloaterreg.h"
#include "llimagej2c.h"
#include "llsys.h"
#include "lltrans.h"
#include "lluri.h"
#include "v3dmath.h"
#include "llwindow.h"
#include "stringize.h"
#include "llsdutil_math.h"
#include "lleventapi.h"

#if LL_WINDOWS
#include "lldxhardware.h"
#endif

extern LLMemoryInfo gSysMemory;
extern U32 gPacketsIn;

static std::string get_viewer_release_notes_url();

///----------------------------------------------------------------------------
/// Class LLServerReleaseNotesURLFetcher
///----------------------------------------------------------------------------
class LLServerReleaseNotesURLFetcher : public LLHTTPClient::Responder
{
	LOG_CLASS(LLServerReleaseNotesURLFetcher);
public:

	static void startFetch();
	/*virtual*/ void completedHeader(U32 status, const std::string& reason, const LLSD& content);
	/*virtual*/ void completedRaw(
		U32 status,
		const std::string& reason,
		const LLChannelDescriptors& channels,
		const LLIOPipe::buffer_ptr_t& buffer);
};

///----------------------------------------------------------------------------
/// Class LLFloaterAbout
///----------------------------------------------------------------------------
class LLFloaterAbout 
	: public LLFloater
{
	friend class LLFloaterReg;
private:
	LLFloaterAbout(const LLSD& key);
	virtual ~LLFloaterAbout();

public:
	/*virtual*/ BOOL postBuild();

	/// Obtain the data used to fill out the contents string. This is
	/// separated so that we can programmatically access the same info.
	static LLSD getInfo();
	void onClickCopyToClipboard();

	void updateServerReleaseNotesURL(const std::string& url);

private:
	void setSupportText(const std::string& server_release_notes_url);
};


// Default constructor
LLFloaterAbout::LLFloaterAbout(const LLSD& key) 
:	LLFloater(key)
{
	
}

// Destroys the object
LLFloaterAbout::~LLFloaterAbout()
{
}

BOOL LLFloaterAbout::postBuild()
{
	center();
	LLViewerTextEditor *support_widget = 
		getChild<LLViewerTextEditor>("support_editor", true);

	LLViewerTextEditor *linden_names_widget = 
		getChild<LLViewerTextEditor>("linden_names", true);

	LLViewerTextEditor *contrib_names_widget = 
		getChild<LLViewerTextEditor>("contrib_names", true);

	LLViewerTextEditor *trans_names_widget = 
		getChild<LLViewerTextEditor>("trans_names", true);

	getChild<LLUICtrl>("copy_btn")->setCommitCallback(
		boost::bind(&LLFloaterAbout::onClickCopyToClipboard, this));

	if (gAgent.getRegion())
	{
		// start fetching server release notes URL
		setSupportText(LLTrans::getString("RetrievingData"));
		LLServerReleaseNotesURLFetcher::startFetch();
	}
	else // not logged in
	{
		setSupportText(LLStringUtil::null);
	}

	support_widget->blockUndo();

	// Fix views
	support_widget->setEnabled(FALSE);
	support_widget->startOfDoc();

	// Get the names of Lindens, added by viewer_manifest.py at build time
	std::string lindens_path = gDirUtilp->getExpandedFilename(LL_PATH_APP_SETTINGS,"lindens.txt");
	llifstream linden_file;
	std::string lindens;
	linden_file.open(lindens_path);		/* Flawfinder: ignore */
	if (linden_file.is_open())
	{
		std::getline(linden_file, lindens); // all names are on a single line
		linden_file.close();
		linden_names_widget->setText(lindens);
	}
	else
	{
		LL_INFOS("AboutInit") << "Could not read lindens file at " << lindens_path << LL_ENDL;
	}
	linden_names_widget->setEnabled(FALSE);
	linden_names_widget->startOfDoc();

	// Get the names of contributors, extracted from .../doc/contributions.txt by viewer_manifest.py at build time
	std::string contributors_path = gDirUtilp->getExpandedFilename(LL_PATH_APP_SETTINGS,"contributors.txt");
	llifstream contrib_file;
	std::string contributors;
	contrib_file.open(contributors_path);		/* Flawfinder: ignore */
	if (contrib_file.is_open())
	{
		std::getline(contrib_file, contributors); // all names are on a single line
		contrib_file.close();
	}
	else
	{
		LL_WARNS("AboutInit") << "Could not read contributors file at " << contributors_path << LL_ENDL;
	}
	contrib_names_widget->setText(contributors);
	contrib_names_widget->setEnabled(FALSE);
	contrib_names_widget->startOfDoc();

	// Get the names of translators, extracted from .../doc/tranlations.txt by viewer_manifest.py at build time
	std::string translators_path = gDirUtilp->getExpandedFilename(LL_PATH_APP_SETTINGS,"translators.txt");
	llifstream trans_file;
	std::string translators;
	trans_file.open(translators_path);		/* Flawfinder: ignore */
	if (trans_file.is_open())
	{
		std::getline(trans_file, translators); // all names are on a single line
		trans_file.close();
	}
	else
	{
		LL_WARNS("AboutInit") << "Could not read translators file at " << translators_path << LL_ENDL;
	}
	trans_names_widget->setText(translators);
	trans_names_widget->setEnabled(FALSE);
	trans_names_widget->startOfDoc();

	return TRUE;
}

// static
LLSD LLFloaterAbout::getInfo()
{
	// The point of having one method build an LLSD info block and the other
	// construct the user-visible About string is to ensure that the same info
	// is available to a getInfo() caller as to the user opening
	// LLFloaterAbout.
	LLSD info;
	LLSD version;
	version.append(LLVersionInfo::getMajor());
	version.append(LLVersionInfo::getMinor());
	version.append(LLVersionInfo::getPatch());
	version.append(LLVersionInfo::getBuild());
	info["VIEWER_VERSION"] = version;
	info["VIEWER_VERSION_STR"] = LLVersionInfo::getVersion();
	info["BUILD_DATE"] = __DATE__;
	info["BUILD_TIME"] = __TIME__;
	info["CHANNEL"] = LLVersionInfo::getChannel();

	info["VIEWER_RELEASE_NOTES_URL"] = get_viewer_release_notes_url();

#if LL_MSVC
	info["COMPILER"] = "MSVC";
	info["COMPILER_VERSION"] = _MSC_VER;
#elif LL_GNUC
	info["COMPILER"] = "GCC";
	info["COMPILER_VERSION"] = GCC_VERSION;
#endif

	// Position
	LLViewerRegion* region = gAgent.getRegion();
	if (region)
	{
		LLVector3d pos = gAgent.getPositionGlobal();
		info["POSITION"] = ll_sd_from_vector3d(pos);
		info["POSITION_LOCAL"] = ll_sd_from_vector3(gAgent.getPosAgentFromGlobal(pos));
		info["REGION"] = gAgent.getRegion()->getName();
		info["HOSTNAME"] = gAgent.getRegion()->getHost().getHostName();
		info["HOSTIP"] = gAgent.getRegion()->getHost().getString();
		info["SERVER_VERSION"] = gLastVersionChannel;
		LLSLURL slurl;
		LLAgentUI::buildSLURL(slurl);
		info["SLURL"] = slurl.getSLURLString();
	}

	// CPU
	info["CPU"] = gSysCPU.getCPUString();
	info["MEMORY_MB"] = LLSD::Integer(gSysMemory.getPhysicalMemoryKB() / 1024);
	// Moved hack adjustment to Windows memory size into llsys.cpp
	info["OS_VERSION"] = LLAppViewer::instance()->getOSInfo().getOSString();
	info["GRAPHICS_CARD_VENDOR"] = (const char*)(glGetString(GL_VENDOR));
	info["GRAPHICS_CARD"] = (const char*)(glGetString(GL_RENDERER));

#if LL_WINDOWS
    LLSD driver_info = gDXHardware.getDisplayInfo();
    if (driver_info.has("DriverVersion"))
    {
        info["GRAPHICS_DRIVER_VERSION"] = driver_info["DriverVersion"];
    }
#endif

	info["OPENGL_VERSION"] = (const char*)(glGetString(GL_VERSION));
	info["LIBCURL_VERSION"] = LLCurl::getVersionString();
	info["J2C_VERSION"] = LLImageJ2C::getEngineInfo();
	bool want_fullname = true;
	info["AUDIO_DRIVER_VERSION"] = gAudiop ? LLSD(gAudiop->getDriverName(want_fullname)) : LLSD();
	if(LLVoiceClient::getInstance()->voiceEnabled())
	{
		LLVoiceVersionInfo version = LLVoiceClient::getInstance()->getVersion();
		std::ostringstream version_string;
		version_string << version.serverType << " " << version.serverVersion << std::endl;
		info["VOICE_VERSION"] = version_string.str();
	}
	else 
	{
		info["VOICE_VERSION"] = LLTrans::getString("NotConnected");
	}
	
	// TODO: Implement media plugin version query
	info["QT_WEBKIT_VERSION"] = "4.7.1 (version number hard-coded)";

	if (gPacketsIn > 0)
	{
		info["PACKETS_LOST"] = LLViewerStats::getInstance()->mPacketsLostStat.getCurrent();
		info["PACKETS_IN"] = F32(gPacketsIn);
		info["PACKETS_PCT"] = 100.f*info["PACKETS_LOST"].asReal() / info["PACKETS_IN"].asReal();
	}

    return info;
}

static std::string get_viewer_release_notes_url()
{
	// return a URL to the release notes for this viewer, such as:
	// http://wiki.secondlife.com/wiki/Release_Notes/Second Life Beta Viewer/2.1.0
	std::string url = LLTrans::getString("RELEASE_NOTES_BASE_URL");
	if (! LLStringUtil::endsWith(url, "/"))
		url += "/";
	url += LLVersionInfo::getChannel() + "/";
	url += LLVersionInfo::getShortVersion();
	return LLWeb::escapeURL(url);
}

class LLFloaterAboutListener: public LLEventAPI
{
public:
	LLFloaterAboutListener():
		LLEventAPI("LLFloaterAbout",
                   "LLFloaterAbout listener to retrieve About box info")
	{
		add("getInfo",
            "Request an LLSD::Map containing information used to populate About box",
            &LLFloaterAboutListener::getInfo,
            LLSD().with("reply", LLSD()));
	}

private:
	void getInfo(const LLSD& request) const
	{
		LLReqID reqid(request);
		LLSD reply(LLFloaterAbout::getInfo());
		reqid.stamp(reply);
		LLEventPumps::instance().obtain(request["reply"]).post(reply);
	}
};

static LLFloaterAboutListener floaterAboutListener;

void LLFloaterAbout::onClickCopyToClipboard()
{
	LLViewerTextEditor *support_widget = 
		getChild<LLViewerTextEditor>("support_editor", true);
	support_widget->selectAll();
	support_widget->copy();
	support_widget->deselect();
}

void LLFloaterAbout::updateServerReleaseNotesURL(const std::string& url)
{
	setSupportText(url);
}

void LLFloaterAbout::setSupportText(const std::string& server_release_notes_url)
{
#if LL_WINDOWS
	getWindow()->incBusyCount();
	getWindow()->setCursor(UI_CURSOR_ARROW);
#endif
	LLSD info(getInfo());
#if LL_WINDOWS
	getWindow()->decBusyCount();
	getWindow()->setCursor(UI_CURSOR_ARROW);
#endif

	if (LLStringUtil::startsWith(server_release_notes_url, "http")) // it's an URL
	{
		info["SERVER_RELEASE_NOTES_URL"] = "[" + LLWeb::escapeURL(server_release_notes_url) + " " + LLTrans::getString("ReleaseNotes") + "]";
	}
	else
	{
		info["SERVER_RELEASE_NOTES_URL"] = server_release_notes_url;
	}

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

	std::ostringstream support;

	// Render the LLSD from getInfo() as a format_map_t
	LLStringUtil::format_map_t args;

	// allow the "Release Notes" URL label to be localized
	args["ReleaseNotes"] = LLTrans::getString("ReleaseNotes");

	for (LLSD::map_const_iterator ii(info.beginMap()), iend(info.endMap());
		 ii != iend; ++ii)
	{
		if (! ii->second.isArray())
		{
			// Scalar value
			if (ii->second.isUndefined())
			{
				args[ii->first] = getString("none");
			}
			else
			{
				// don't forget to render value asString()
				args[ii->first] = ii->second.asString();
			}
		}
		else
		{
			// array value: build KEY_0, KEY_1 etc. entries
			for (LLSD::Integer n(0), size(ii->second.size()); n < size; ++n)
			{
				args[STRINGIZE(ii->first << '_' << n)] = ii->second[n].asString();
			}
		}
	}

	// Now build the various pieces
	support << getString("AboutHeader", args);
	if (info.has("REGION"))
	{
		support << "\n\n" << getString("AboutPosition", args);
	}
	support << "\n\n" << getString("AboutSystem", args);
	support << "\n";
	if (info.has("GRAPHICS_DRIVER_VERSION"))
	{
		support << "\n" << getString("AboutDriver", args);
	}
	support << "\n" << getString("AboutLibs", args);
	if (info.has("COMPILER"))
	{
		support << "\n" << getString("AboutCompiler", args);
	}
	if (info.has("PACKETS_IN"))
	{
		support << '\n' << getString("AboutTraffic", args);
	}

	support_widget->clear();
	support_widget->appendText(support.str(),
								FALSE,
								LLStyle::Params()
									.color(LLUIColorTable::instance().getColor("TextFgReadOnlyColor")));
}

///----------------------------------------------------------------------------
/// LLFloaterAboutUtil
///----------------------------------------------------------------------------
void LLFloaterAboutUtil::registerFloater()
{
	LLFloaterReg::add("sl_about", "floater_about.xml",
		&LLFloaterReg::build<LLFloaterAbout>);

}

///----------------------------------------------------------------------------
/// Class LLServerReleaseNotesURLFetcher implementation
///----------------------------------------------------------------------------
// static
void LLServerReleaseNotesURLFetcher::startFetch()
{
	LLViewerRegion* region = gAgent.getRegion();
	if (!region) return;

	// We cannot display the URL returned by the ServerReleaseNotes capability
	// because opening it in an external browser will trigger a warning about untrusted
	// SSL certificate.
	// So we query the URL ourselves, expecting to find
	// an URL suitable for external browsers in the "Location:" HTTP header.
	std::string cap_url = region->getCapability("ServerReleaseNotes");
	LLHTTPClient::get(cap_url, new LLServerReleaseNotesURLFetcher);
}

// virtual
void LLServerReleaseNotesURLFetcher::completedHeader(U32 status, const std::string& reason, const LLSD& content)
{
	lldebugs << "Status: " << status << llendl;
	lldebugs << "Reason: " << reason << llendl;
	lldebugs << "Headers: " << content << llendl;

	LLFloaterAbout* floater_about = LLFloaterReg::getTypedInstance<LLFloaterAbout>("sl_about");
	if (floater_about)
	{
		std::string location = content["location"].asString();
		if (location.empty())
		{
			location = floater_about->getString("ErrorFetchingServerReleaseNotesURL");
		}
		floater_about->updateServerReleaseNotesURL(location);
	}
}

// virtual
void LLServerReleaseNotesURLFetcher::completedRaw(
	U32 status,
	const std::string& reason,
	const LLChannelDescriptors& channels,
	const LLIOPipe::buffer_ptr_t& buffer)
{
	// Do nothing.
	// We're overriding just because the base implementation tries to
	// deserialize LLSD which triggers warnings.
}