/**
* @file floatervoicelicense.cpp
* @brief prompts user to agree to the Vivox license in order to enable voice
*
* $LicenseInfo:firstyear=2009&license=viewergpl$
*
* Copyright (c) 2010, McCabe Maxsted
*
* Imprudence Viewer Source Code
* The source code in this file ("Source Code") is provided to you
* under the terms of the GNU General Public License, version 2.0
* ("GPL"). 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 SOURCE CODE IS PROVIDED "AS IS." THE AUTHOR MAKES NO
* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
* COMPLETENESS OR PERFORMANCE.
* $/LicenseInfo$
*/

#include "llviewerprecompiledheaders.h"

#include "floatervoicelicense.h"

// viewer includes
#include "llagent.h"
#include "llappviewer.h"
#include "llstartup.h"
#include "llviewercontrol.h"
#include "llviewerstats.h"
#include "llviewertexteditor.h"
#include "llviewerwindow.h"

// linden library includes
#include "llbutton.h"
#include "llhttpclient.h"
#include "llhttpstatuscodes.h"	// for HTTP_FOUND
#include "llradiogroup.h"
#include "lltextbox.h"
#include "llui.h"
#include "lluictrlfactory.h"
#include "llvfile.h"
#include "message.h"


FloaterVoiceLicense::FloaterVoiceLicense(const LLSD& key)
:	LLModalDialog( std::string(" "), 100, 100 ),
	mWebBrowserWindowId( 0 ),
	mLoadCompleteCount( 0 )
{
	LLUICtrlFactory::getInstance()->buildFloater(this, "floater_voice_license.xml");
}

// helper class that trys to download a URL from a web site and calls a method 
// on parent class indicating if the web server is working or not
class LLIamHere : public LLHTTPClient::Responder
{
	private:
		LLIamHere( FloaterVoiceLicense* parent ) :
		   mParent( parent )
		{}

		FloaterVoiceLicense* mParent;

	public:

		static boost::intrusive_ptr< LLIamHere > build( FloaterVoiceLicense* parent )
		{
			return boost::intrusive_ptr< LLIamHere >( new LLIamHere( parent ) );
		};
		
		virtual void  setParent( FloaterVoiceLicense* parentIn )
		{
			mParent = parentIn;
		};
		
		virtual void result( const LLSD& content )
		{
			if ( mParent )
				mParent->setSiteIsAlive( true );
		};

		virtual void error( U32 status, const std::string& reason )
		{
			if ( mParent )
			{
				// *HACK: For purposes of this alive check, 302 Found
				// (aka Moved Temporarily) is considered alive.  The web site
				// redirects this link to a "cache busting" temporary URL. JC
				bool alive = (status == HTTP_FOUND);
				mParent->setSiteIsAlive( alive );
			}
		};
};

// this is global and not a class member to keep crud out of the header file
namespace {
	boost::intrusive_ptr< LLIamHere > gResponsePtr = 0;
};

BOOL FloaterVoiceLicense::postBuild()
{	
	childSetAction("Continue", onContinue, this);
	childSetAction("Cancel", onCancel, this);
	childSetCommitCallback("agree_chk", updateAgree, this);

	// disable Agree to License radio button until the page has fully loaded
	LLCheckBoxCtrl* license_agreement = getChild<LLCheckBoxCtrl>("agree_chk");
	license_agreement->setEnabled( false );

	// hide the SL text widget if we're displaying license with using a browser widget.
	LLTextEditor *editor = getChild<LLTextEditor>("license_text");
	editor->setVisible( FALSE );

	LLWebBrowserCtrl* web_browser = getChild<LLWebBrowserCtrl>("license_html");
	if ( web_browser )
	{
		// start to observe it so we see navigate complete events
		web_browser->addObserver( this );

		gResponsePtr = LLIamHere::build( this );
		LLHTTPClient::get( getString( "real_url" ), gResponsePtr );
	}

	return TRUE;
}

void FloaterVoiceLicense::setSiteIsAlive( bool alive )
{
	LLWebBrowserCtrl* web_browser = getChild<LLWebBrowserCtrl>("license_html");
	// if the contents of the site was retrieved
	if ( alive )
	{
		if ( web_browser )
		{
			// navigate to the "real" page 
			web_browser->navigateTo( getString( "real_url" ) );
		}
	}
	else
	{
		// normally this is set when navigation to license page completes (so you can't accept before it loads)
		// but if the page is unavailable, we need to do this now
		LLCheckBoxCtrl* license_agreement = getChild<LLCheckBoxCtrl>("agree_chk");
		license_agreement->setEnabled( true );
	}
}

FloaterVoiceLicense::~FloaterVoiceLicense()
{
	// stop observing events
	LLWebBrowserCtrl* web_browser = getChild<LLWebBrowserCtrl>("license_html");
	if ( web_browser )
	{
		web_browser->remObserver( this );		
	}

	// tell the responder we're not here anymore
	if ( gResponsePtr )
	{
		gResponsePtr->setParent( 0 );
	}
}

// virtual
void FloaterVoiceLicense::draw()
{
	// draw children
	LLModalDialog::draw();
}

// static
void FloaterVoiceLicense::updateAgree(LLUICtrl*, void* userdata )
{
	FloaterVoiceLicense* self = (FloaterVoiceLicense*) userdata;
	bool agree = self->childGetValue("agree_chk").asBoolean(); 
	self->childSetEnabled("Continue", agree);
}

// static
void FloaterVoiceLicense::onContinue( void* userdata )
{
	FloaterVoiceLicense* self = (FloaterVoiceLicense*) userdata;
	llinfos << "User agreed to the Vivox personal license" << llendl;

	// enabling voice by default here seems like the best behavior
	gSavedSettings.setBOOL("EnableVoiceChat", TRUE);
	gSavedSettings.setBOOL("VivoxLicenseAccepted", TRUE);

	// save these settings in case something bad happens later
	gSavedSettings.saveToFile(gSavedSettings.getString("ClientSettingsFile"), TRUE);

	if (LLStartUp::getStartupState() == STATE_LOGIN_VOICE_LICENSE)
	{
		LLStartUp::setStartupState( STATE_LOGIN_AUTH_INIT );			// Go back and finish authentication
	}
	self->close(); // destroys this object
}

// static
void FloaterVoiceLicense::onCancel( void* userdata )
{
	FloaterVoiceLicense* self = (FloaterVoiceLicense*) userdata;
	llinfos << "User disagreed with the vivox personal license" << llendl;
	gSavedSettings.setBOOL("EnableVoiceChat", FALSE);
	gSavedSettings.setBOOL("VivoxLicenseAccepted", FALSE);
	
	if (LLStartUp::getStartupState() == STATE_LOGIN_VOICE_LICENSE)
	{
		LLStartUp::setStartupState( STATE_LOGIN_AUTH_INIT );			// Go back and finish authentication
	}
	self->mLoadCompleteCount = 0;  // reset counter for next time we come here
	self->close(); // destroys this object
}

//virtual 
void FloaterVoiceLicense::onNavigateComplete( const EventType& eventIn )
{
	// skip past the loading screen navigate complete
	if ( ++mLoadCompleteCount == 2 )
	{
		llinfos << "NAVIGATE COMPLETE" << llendl;
		// enable Agree to License radio button now that page has loaded
		LLCheckBoxCtrl * license_agreement = getChild<LLCheckBoxCtrl>("agree_chk");
		license_agreement->setEnabled( true );
	}
}