/** 
 * @file llfloaterhtmlhelp.cpp
 * @brief HTML Help floater - uses embedded web browser control
 *
 * $LicenseInfo:firstyear=2006&license=viewergpl$
 * 
 * Copyright (c) 2006-2009, 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 "llfloaterhtmlhelp.h"
#include "llfloaterhtml.h"

#include "llparcel.h"
#include "lluictrlfactory.h"
#include "llwebbrowserctrl.h"
#include "llviewerwindow.h"
#include "llviewercontrol.h"
#include "llviewerparcelmgr.h"
#include "llweb.h"
#include "llui.h"
#include "roles_constants.h"

#include "llurlhistory.h"
#include "llwebbrowserctrl.h"
#include "llviewermedia.h"
#include "llviewerparcelmedia.h"
#include "llcombobox.h"


LLFloaterMediaBrowser::LLFloaterMediaBrowser(const LLSD& media_data)
{
	LLUICtrlFactory::getInstance()->buildFloater(this, "floater_media_browser.xml");
}

void LLFloaterMediaBrowser::draw()
{
	childSetEnabled("go", !mAddressCombo->getValue().asString().empty());
	LLParcel* parcel = LLViewerParcelMgr::getInstance()->getAgentParcel();
	if(parcel)
	{
		childSetVisible("parcel_owner_controls", LLViewerParcelMgr::isParcelModifiableByAgent(parcel, GP_LAND_CHANGE_MEDIA));
		childSetEnabled("assign", !mAddressCombo->getValue().asString().empty());
	}
	LLFloater::draw();
}

BOOL LLFloaterMediaBrowser::postBuild()
{
	mBrowser = getChild<LLWebBrowserCtrl>("browser");
	mBrowser->addObserver(this);

	mAddressCombo = getChild<LLComboBox>("address");
	mAddressCombo->setCommitCallback(onEnterAddress);
	mAddressCombo->setCallbackUserData(this);

	childSetAction("back", onClickBack, this);
	childSetAction("forward", onClickForward, this);
	childSetAction("reload", onClickRefresh, this);
	childSetAction("go", onClickGo, this);
	childSetAction("close", onClickClose, this);
	childSetAction("open_browser", onClickOpenWebBrowser, this);
	childSetAction("assign", onClickAssign, this);

	buildURLHistory();
	return TRUE;
}

void LLFloaterMediaBrowser::buildURLHistory()
{
	LLCtrlListInterface* url_list = childGetListInterface("address");
	if (url_list)
	{
		url_list->operateOnAll(LLCtrlListInterface::OP_DELETE);
	}

	// Get all of the entries in the "parcel" collection
	LLSD parcel_history = LLURLHistory::getURLHistory("browser");

	LLSD::array_iterator iter_history =
		parcel_history.beginArray();
	LLSD::array_iterator end_history =
		parcel_history.endArray();
	for(; iter_history != end_history; ++iter_history)
	{
		std::string url = (*iter_history).asString();
		if(! url.empty())
			url_list->addSimpleElement(url);
	}
}

void LLFloaterMediaBrowser::onClose(bool app_quitting)
{
	//setVisible(FALSE);
	destroy();
}

void LLFloaterMediaBrowser::onLocationChange( const EventType& eventIn )
{
	// hitting the refresh button will navigate to same URL, so don't add to address history
	mCurrentURL = eventIn.getStringValue();
	std::string::size_type string_start = mCurrentURL.find("://");
	std::string truncated_url;
	if ((string_start == std::string::npos) || (1)) // NOTE: this conditional is forced true to disable truncation DEV-9834
	{
		truncated_url = mCurrentURL;
	}
	else
	{
		truncated_url = mCurrentURL.substr(string_start + 3);
	}
	// redirects will navigate momentarily to about:blank, don't add to history
	if (truncated_url != "about:blank")
	{
		mAddressCombo->remove(truncated_url);
		mAddressCombo->add(truncated_url, ADD_SORTED);
		mAddressCombo->selectByValue(truncated_url);

		// Serialize url history
		LLURLHistory::removeURL("browser", truncated_url);
		LLURLHistory::addURL("browser", truncated_url);
	}
	childSetEnabled("back", mBrowser->canNavigateBack());
	childSetEnabled("forward", mBrowser->canNavigateForward());
	childSetEnabled("reload", TRUE);
}

LLFloaterMediaBrowser* LLFloaterMediaBrowser::showInstance(const LLSD& media_url)
{
	LLFloaterMediaBrowser* floaterp = LLUISingleton<LLFloaterMediaBrowser, VisibilityPolicy<LLFloater> >::showInstance(media_url);

	floaterp->openMedia(media_url.asString());
	return floaterp;
}

//static 
void LLFloaterMediaBrowser::onEnterAddress(LLUICtrl* ctrl, void* user_data)
{
	LLFloaterMediaBrowser* self = (LLFloaterMediaBrowser*)user_data;
	self->mBrowser->navigateTo(self->mAddressCombo->getValue().asString());
}

//static 
void LLFloaterMediaBrowser::onClickRefresh(void* user_data)
{
	LLFloaterMediaBrowser* self = (LLFloaterMediaBrowser*)user_data;

	self->mAddressCombo->remove(0);
	self->mBrowser->navigateTo(self->mCurrentURL);
}

//static 
void LLFloaterMediaBrowser::onClickForward(void* user_data)
{
	LLFloaterMediaBrowser* self = (LLFloaterMediaBrowser*)user_data;

	self->mBrowser->navigateForward();
}

//static 
void LLFloaterMediaBrowser::onClickBack(void* user_data)
{
	LLFloaterMediaBrowser* self = (LLFloaterMediaBrowser*)user_data;

	self->mBrowser->navigateBack();
}

//static 
void LLFloaterMediaBrowser::onClickGo(void* user_data)
{
	LLFloaterMediaBrowser* self = (LLFloaterMediaBrowser*)user_data;

	self->mBrowser->navigateTo(self->mAddressCombo->getValue().asString());
}

//static 
void LLFloaterMediaBrowser::onClickClose(void* user_data)
{
	LLFloaterMediaBrowser* self = (LLFloaterMediaBrowser*)user_data;

	self->close();
}

//static 
void LLFloaterMediaBrowser::onClickOpenWebBrowser(void* user_data)
{
	LLFloaterMediaBrowser* self = (LLFloaterMediaBrowser*)user_data;

	std::string url = self->mCurrentURL.empty() ? 
		self->mBrowser->getHomePageUrl() :
		self->mCurrentURL;
	LLWeb::loadURLExternal(url);
}

void LLFloaterMediaBrowser::onClickAssign(void* user_data)
{
	LLFloaterMediaBrowser* self = (LLFloaterMediaBrowser*)user_data;

	LLParcel* parcel = LLViewerParcelMgr::getInstance()->getAgentParcel();
	if (!parcel)
	{
		return;
	}
	std::string media_url = self->mAddressCombo->getValue().asString();
	LLStringUtil::trim(media_url);

	parcel->setMediaURL(media_url);
	parcel->setMediaType(std::string("text/html"));

	// Send current parcel data upstream to server 
	LLViewerParcelMgr::getInstance()->sendParcelPropertiesUpdate( parcel, true );
	// now check for video
	LLViewerParcelMedia::update( parcel );


}

void LLFloaterMediaBrowser::openMedia(const std::string& media_url)
{
	mBrowser->setHomePageUrl(media_url);
	mBrowser->navigateTo(media_url);
}

LLViewerHtmlHelp gViewerHtmlHelp;

class LLFloaterHtmlHelp :
	public LLFloater,
	public LLWebBrowserCtrlObserver
{
public:
	LLFloaterHtmlHelp(std::string start_url, std::string title);
	virtual ~LLFloaterHtmlHelp();
	
	virtual void onClose( bool app_quitting );
	virtual void draw();
	
	static void show(std::string url, std::string title);
	static void onClickBack( void* data );
	static void onClickHome( void* data );
	static void onClickForward( void* data );
	static void onClickClose( void* data );
	
	// browser observer impls
	virtual void onStatusTextChange( const EventType& eventIn );
	virtual void onLocationChange( const EventType& eventIn );
	
	// used for some stats logging - will be removed at some point
	static BOOL sFloaterOpened;

	static void onClickF1HelpLoadURL(S32 option, void* userdata);

protected:
	LLWebBrowserCtrl* mWebBrowser;
	static LLFloaterHtmlHelp* sInstance;
	LLButton* mBackButton;
	LLButton* mForwardButton;
	LLButton* mCloseButton;
	LLTextBox* mStatusText;
	std::string mStatusTextContents;
	std::string mCurrentUrl;
	std::string mSupportUrl;
};

LLFloaterHtmlHelp* LLFloaterHtmlHelp::sInstance = 0;

BOOL LLFloaterHtmlHelp::sFloaterOpened = FALSE;

////////////////////////////////////////////////////////////////////////////////
//
LLFloaterHtmlHelp::LLFloaterHtmlHelp(std::string start_url, std::string title)
:	LLFloater( std::string("HTML Help") ),
	mWebBrowser( 0 ),
	mStatusTextContents( LLStringUtil::null ),
	mCurrentUrl( LLStringUtil::null )
{
	sInstance = this;
		
	// create floater from its XML definition
	LLUICtrlFactory::getInstance()->buildFloater( this, "floater_html_help.xml" );
		
	childSetAction("back_btn", onClickBack, this);
	childSetAction("home_btn", onClickHome, this);
	childSetAction("forward_btn", onClickForward, this);

	if (!title.empty())
	{
		setTitle(title);
	}

	mWebBrowser = getChild<LLWebBrowserCtrl>("html_help_browser" );
	if ( mWebBrowser )
	{
		// observe browser control events
		mWebBrowser->addObserver( this );

		if (start_url != "")
		{
			mWebBrowser->navigateTo( start_url );
		}
		else
		{
			// if the last page we were at before the client was closed is valid, go there and
			// override what is in the XML file
			// (not when the window was closed - it's only ever hidden - not closed)
			std::string lastPageUrl = gSavedSettings.getString( "HtmlHelpLastPage" );
			if ( lastPageUrl != "" )
			{
				mWebBrowser->navigateTo( lastPageUrl );
			};
		}
	};
}

////////////////////////////////////////////////////////////////////////////////
//
LLFloaterHtmlHelp::~LLFloaterHtmlHelp()
{
	// stop observing browser events
	if ( mWebBrowser )
	{
		mWebBrowser->remObserver( this );
	};

	// save position of floater
	gSavedSettings.setRect( "HtmlHelpRect", getRect() );

	// save the location we were at when SL closed 
	gSavedSettings.setString( "HtmlHelpLastPage", mCurrentUrl );

	sInstance = 0;
}

////////////////////////////////////////////////////////////////////////////////
// virtual 
void LLFloaterHtmlHelp::draw()
{
	// enable/disable buttons depending on state
	if ( mWebBrowser )
	{
		bool enable_back = mWebBrowser->canNavigateBack();	
		childSetEnabled( "back_btn", enable_back );

		bool enable_forward = mWebBrowser->canNavigateForward();	
		childSetEnabled( "forward_btn", enable_forward );
	};

	LLFloater::draw();
}

////////////////////////////////////////////////////////////////////////////////
//
void LLFloaterHtmlHelp::show(std::string url, std::string title)
{
	LLFloaterHtml* floater_html = LLFloaterHtml::getInstance();
	floater_html->setVisible(FALSE);

	if(url.empty())
	{
		url = floater_html->getSupportUrl();
	}
	std::string* url_copy = new std::string(url);

    gViewerWindow->alertXml("ClickOpenF1Help", onClickF1HelpLoadURL, url_copy);

}

// static 
void LLFloaterHtmlHelp::onClickF1HelpLoadURL(S32 option, void* userdata)
{
	std::string* urlp = (std::string*)userdata;
	if (0 == option)
	{
		LLWeb::loadURL(urlp->c_str());
	}
	delete urlp;
}

////////////////////////////////////////////////////////////////////////////////
//
void LLFloaterHtmlHelp::onClose( bool app_quitting )
{
	setVisible( false );
}

////////////////////////////////////////////////////////////////////////////////
//
void LLFloaterHtmlHelp::onClickClose( void* data )
{
	LLFloaterHtmlHelp* self = ( LLFloaterHtmlHelp* )data;

	self->setVisible( false );
}

////////////////////////////////////////////////////////////////////////////////
//
void LLFloaterHtmlHelp::onClickBack( void* data )
{
	LLFloaterHtmlHelp* self = ( LLFloaterHtmlHelp* )data;
	if ( self )
	{
		if ( self->mWebBrowser )
		{
			self->mWebBrowser->navigateBack();
		};
	};
}

////////////////////////////////////////////////////////////////////////////////
//
void LLFloaterHtmlHelp::onClickHome( void* data )
{
	LLFloaterHtmlHelp* self = ( LLFloaterHtmlHelp* )data;
	if ( self )
	{
		// get the home page URL (which can differ from the start URL) from XML and go there
		LLWebBrowserCtrl* web_browser = self->getChild<LLWebBrowserCtrl>("html_help_browser" );
		if ( web_browser )
		{
			web_browser->navigateHome();
		};
	};
}

////////////////////////////////////////////////////////////////////////////////
// 
void LLFloaterHtmlHelp::onClickForward( void* data )
{
	LLFloaterHtmlHelp* self = ( LLFloaterHtmlHelp* )data;
	if ( self )
	{
		if ( self->mWebBrowser )
		{
			self->mWebBrowser->navigateForward();
		};
	};
}

////////////////////////////////////////////////////////////////////////////////
//
void LLFloaterHtmlHelp::onStatusTextChange( const EventType& eventIn )
{
	mStatusTextContents = std::string( eventIn.getStringValue() );

	childSetText("status_text", mStatusTextContents);
}

////////////////////////////////////////////////////////////////////////////////
//
void LLFloaterHtmlHelp::onLocationChange( const EventType& eventIn )
{
	llinfos << "MOZ> Location changed to " << eventIn.getStringValue() << llendl;
	mCurrentUrl = std::string( eventIn.getStringValue() );
}

////////////////////////////////////////////////////////////////////////////////
//
LLViewerHtmlHelp::LLViewerHtmlHelp()
{
	LLUI::setHtmlHelp(this);
}

LLViewerHtmlHelp::~LLViewerHtmlHelp()
{
	LLUI::setHtmlHelp(NULL);
}

void LLViewerHtmlHelp::show()
{
	LLFloaterHtmlHelp::show("", "");
}

void LLViewerHtmlHelp::show(std::string url)
{
	std::string title;	// empty
	LLFloaterHtmlHelp::show(url, title);
}