/*
===========================================================================

Doom 3 BFG Edition GPL Source Code
Copyright (C) 1993-2012 id Software LLC, a ZeniMax Media company.

This file is part of the Doom 3 BFG Edition GPL Source Code ("Doom 3 BFG Edition Source Code").

Doom 3 BFG Edition Source Code is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

Doom 3 BFG Edition Source Code 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with Doom 3 BFG Edition Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the Doom 3 BFG Edition Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 BFG Edition Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

===========================================================================
*/

#pragma hdrstop
#include "precompiled.h"

#include "DeviceContext.h"
#include "Window.h"
#include "UserInterfaceLocal.h"
#include "ChoiceWindow.h"

/*
============
idChoiceWindow::InitVars
============
*/
void idChoiceWindow::InitVars( )
{
	if( cvarStr.Length() )
	{
		cvar = cvarSystem->Find( cvarStr );
		if( !cvar )
		{
			common->Warning( "idChoiceWindow::InitVars: gui '%s' window '%s' references undefined cvar '%s'", gui->GetSourceFile(), name.c_str(), cvarStr.c_str() );
			return;
		}
		updateStr.Append( &cvarStr );
	}
	if( guiStr.Length() )
	{
		updateStr.Append( &guiStr );
	}
	updateStr.SetGuiInfo( gui->GetStateDict() );
	updateStr.Update();
}

/*
============
idChoiceWindow::CommonInit
============
*/
void idChoiceWindow::CommonInit()
{
	currentChoice = 0;
	choiceType = 0;
	cvar = NULL;
	liveUpdate = true;
	choices.Clear();
}

idChoiceWindow::idChoiceWindow( idUserInterfaceLocal* g ) : idWindow( g )
{
	gui = g;
	CommonInit();
}

idChoiceWindow::~idChoiceWindow()
{

}

void idChoiceWindow::RunNamedEvent( const char* eventName )
{
	idStr event, group;
	
	if( !idStr::Cmpn( eventName, "cvar read ", 10 ) )
	{
		event = eventName;
		group = event.Mid( 10, event.Length() - 10 );
		if( !group.Cmp( updateGroup ) )
		{
			UpdateVars( true, true );
		}
	}
	else if( !idStr::Cmpn( eventName, "cvar write ", 11 ) )
	{
		event = eventName;
		group = event.Mid( 11, event.Length() - 11 );
		if( !group.Cmp( updateGroup ) )
		{
			UpdateVars( false, true );
		}
	}
}

void idChoiceWindow::UpdateVars( bool read, bool force )
{
	if( force || liveUpdate )
	{
		if( cvar && cvarStr.NeedsUpdate() )
		{
			if( read )
			{
				cvarStr.Set( cvar->GetString() );
			}
			else
			{
				cvar->SetString( cvarStr.c_str() );
			}
		}
		if( !read && guiStr.NeedsUpdate() )
		{
			guiStr.Set( va( "%i", currentChoice ) );
		}
	}
}

const char* idChoiceWindow::HandleEvent( const sysEvent_t* event, bool* updateVisuals )
{
	int key;
	bool runAction = false;
	bool runAction2 = false;
	
	if( event->evType == SE_KEY )
	{
		key = event->evValue;
		
		if( key == K_RIGHTARROW || key == K_KP_6 || key == K_MOUSE1 )
		{
			// never affects the state, but we want to execute script handlers anyway
			if( !event->evValue2 )
			{
				RunScript( ON_ACTIONRELEASE );
				return cmd;
			}
			currentChoice++;
			if( currentChoice >= choices.Num() )
			{
				currentChoice = 0;
			}
			runAction = true;
		}
		
		if( key == K_LEFTARROW || key == K_KP_4 || key == K_MOUSE2 )
		{
			// never affects the state, but we want to execute script handlers anyway
			if( !event->evValue2 )
			{
				RunScript( ON_ACTIONRELEASE );
				return cmd;
			}
			currentChoice--;
			if( currentChoice < 0 )
			{
				currentChoice = choices.Num() - 1;
			}
			runAction = true;
		}
		
		if( !event->evValue2 )
		{
			// is a key release with no action catch
			return "";
		}
		
	}
	else if( event->evType == SE_CHAR )
	{
	
		key = event->evValue;
		
		int potentialChoice = -1;
		for( int i = 0; i < choices.Num(); i++ )
		{
			if( toupper( key ) == toupper( choices[i][0] ) )
			{
				if( i < currentChoice && potentialChoice < 0 )
				{
					potentialChoice = i;
				}
				else if( i > currentChoice )
				{
					potentialChoice = -1;
					currentChoice = i;
					break;
				}
			}
		}
		if( potentialChoice >= 0 )
		{
			currentChoice = potentialChoice;
		}
		
		runAction = true;
		runAction2 = true;
		
	}
	else
	{
		return "";
	}
	
	if( runAction )
	{
		RunScript( ON_ACTION );
	}
	
	if( choiceType == 0 )
	{
		cvarStr.Set( va( "%i", currentChoice ) );
	}
	else if( values.Num() )
	{
		cvarStr.Set( values[ currentChoice ] );
	}
	else
	{
		cvarStr.Set( choices[ currentChoice ] );
	}
	
	UpdateVars( false );
	
	if( runAction2 )
	{
		RunScript( ON_ACTIONRELEASE );
	}
	
	return cmd;
}

void idChoiceWindow::ValidateChoice()
{
	if( currentChoice < 0 || currentChoice >= choices.Num() )
	{
		currentChoice = 0;
	}
	if( choices.Num() == 0 )
	{
		choices.Append( "No Choices Defined" );
	}
}

void idChoiceWindow::UpdateChoice()
{
	if( !updateStr.Num() )
	{
		return;
	}
	UpdateVars( true );
	updateStr.Update();
	if( choiceType == 0 )
	{
		// ChoiceType 0 stores current as an integer in either cvar or gui
		// If both cvar and gui are defined then cvar wins, but they are both updated
		if( updateStr[ 0 ]->NeedsUpdate() )
		{
			currentChoice = atoi( updateStr[ 0 ]->c_str() );
		}
		ValidateChoice();
	}
	else
	{
		// ChoiceType 1 stores current as a cvar string
		int c = ( values.Num() ) ? values.Num() : choices.Num();
		int i;
		for( i = 0; i < c; i++ )
		{
			if( idStr::Icmp( cvarStr.c_str(), ( values.Num() ) ? values[i] : choices[i] ) == 0 )
			{
				break;
			}
		}
		if( i == c )
		{
			i = 0;
		}
		currentChoice = i;
		ValidateChoice();
	}
}

bool idChoiceWindow::ParseInternalVar( const char* _name, idTokenParser* src )
{
	if( idStr::Icmp( _name, "choicetype" ) == 0 )
	{
		choiceType = src->ParseInt();
		return true;
	}
	if( idStr::Icmp( _name, "currentchoice" ) == 0 )
	{
		currentChoice = src->ParseInt();
		return true;
	}
	return idWindow::ParseInternalVar( _name, src );
}


idWinVar* idChoiceWindow::GetWinVarByName( const char* _name, bool fixup, drawWin_t** owner )
{
	if( idStr::Icmp( _name, "choices" ) == 0 )
	{
		return &choicesStr;
	}
	if( idStr::Icmp( _name, "values" ) == 0 )
	{
		return &choiceVals;
	}
	if( idStr::Icmp( _name, "cvar" ) == 0 )
	{
		return &cvarStr;
	}
	if( idStr::Icmp( _name, "gui" ) == 0 )
	{
		return &guiStr;
	}
	if( idStr::Icmp( _name, "liveUpdate" ) == 0 )
	{
		return &liveUpdate;
	}
	if( idStr::Icmp( _name, "updateGroup" ) == 0 )
	{
		return &updateGroup;
	}
	
	return idWindow::GetWinVarByName( _name, fixup, owner );
}

// update the lists whenever the WinVar have changed
void idChoiceWindow::UpdateChoicesAndVals()
{
	idToken token;
	idStr str2, str3;
	idLexer src;
	
	if( latchedChoices.Icmp( choicesStr ) )
	{
		choices.Clear();
		src.FreeSource();
		src.SetFlags( LEXFL_NOFATALERRORS | LEXFL_ALLOWPATHNAMES | LEXFL_ALLOWMULTICHARLITERALS | LEXFL_ALLOWBACKSLASHSTRINGCONCAT );
		src.LoadMemory( choicesStr, choicesStr.Length(), "<ChoiceList>" );
		if( src.IsLoaded() )
		{
			while( src.ReadToken( &token ) )
			{
				if( token == ";" )
				{
					if( str2.Length() )
					{
						str2.StripTrailingWhitespace();
						str2 = idLocalization::GetString( str2 );
						choices.Append( str2 );
						str2 = "";
					}
					continue;
				}
				str2 += token;
				str2 += " ";
			}
			if( str2.Length() )
			{
				str2.StripTrailingWhitespace();
				choices.Append( str2 );
			}
		}
		latchedChoices = choicesStr.c_str();
	}
	if( choiceVals.Length() && latchedVals.Icmp( choiceVals ) )
	{
		values.Clear();
		src.FreeSource();
		src.SetFlags( LEXFL_ALLOWPATHNAMES | LEXFL_ALLOWMULTICHARLITERALS | LEXFL_ALLOWBACKSLASHSTRINGCONCAT );
		src.LoadMemory( choiceVals, choiceVals.Length(), "<ChoiceVals>" );
		str2 = "";
		bool negNum = false;
		if( src.IsLoaded() )
		{
			while( src.ReadToken( &token ) )
			{
				if( token == "-" )
				{
					negNum = true;
					continue;
				}
				if( token == ";" )
				{
					if( str2.Length() )
					{
						str2.StripTrailingWhitespace();
						values.Append( str2 );
						str2 = "";
					}
					continue;
				}
				if( negNum )
				{
					str2 += "-";
					negNum = false;
				}
				str2 += token;
				str2 += " ";
			}
			if( str2.Length() )
			{
				str2.StripTrailingWhitespace();
				values.Append( str2 );
			}
		}
		if( choices.Num() != values.Num() )
		{
			common->Warning( "idChoiceWindow:: gui '%s' window '%s' has value count unequal to choices count", gui->GetSourceFile(), name.c_str() );
		}
		latchedVals = choiceVals.c_str();
	}
}

void idChoiceWindow::PostParse()
{
	idWindow::PostParse();
	UpdateChoicesAndVals();
	
	InitVars();
	UpdateChoice();
	UpdateVars( false );
	
	flags |= WIN_CANFOCUS;
}

void idChoiceWindow::Draw( int time, float x, float y )
{
	idVec4 color = foreColor;
	
	UpdateChoicesAndVals();
	UpdateChoice();
	
	// FIXME: It'd be really cool if textAlign worked, but a lot of the guis have it set wrong because it used to not work
	textAlign = 0;
	
	if( textShadow )
	{
		idStr shadowText = choices[currentChoice];
		idRectangle shadowRect = textRect;
		
		shadowText.RemoveColors();
		shadowRect.x += textShadow;
		shadowRect.y += textShadow;
		
		dc->DrawText( shadowText, textScale, textAlign, colorBlack, shadowRect, false, -1 );
	}
	
	if( hover && !noEvents && Contains( gui->CursorX(), gui->CursorY() ) )
	{
		color = hoverColor;
	}
	else
	{
		hover = false;
	}
	if( flags & WIN_FOCUS )
	{
		color = hoverColor;
	}
	
	dc->DrawText( choices[currentChoice], textScale, textAlign, color, textRect, false, -1 );
}

void idChoiceWindow::Activate( bool activate, idStr& act )
{
	idWindow::Activate( activate, act );
	if( activate )
	{
		// sets the gui state based on the current choice the window contains
		UpdateChoice();
	}
}
