//=========== (C) Copyright 1999 Valve, L.L.C. All rights reserved. ===========
//
// The copyright to the contents herein is the property of Valve, L.L.C.
// The contents may be used and/or copied only with the written permission of
// Valve, L.L.C., or in accordance with the terms and conditions stipulated in
// the agreement/contract under which the contents have been supplied.
//
// Purpose: 
//
// $Workfile:     $
// $Date:         $
//
//-----------------------------------------------------------------------------
// $Log: $
//
// $NoKeywords: $
//=============================================================================

#include "hud.h"
#include "vgui_SchemeManager.h"
#include "cvardef.h"

#include <string.h>


cvar_t *g_CV_BitmapFonts;


void Scheme_Init()
{
	g_CV_BitmapFonts = gEngfuncs.pfnRegisterVariable("bitmapfonts", "1", 0);
}



//-----------------------------------------------------------------------------
// Purpose: Scheme managers data container
//-----------------------------------------------------------------------------
class CSchemeManager::CScheme
{
public:
	enum { 
		SCHEME_NAME_LENGTH = 32,
		FONT_NAME_LENGTH = 48,
		FONT_FILENAME_LENGTH = 64,
	};
	
	// name
	char schemeName[SCHEME_NAME_LENGTH];

	// font
	char fontName[FONT_NAME_LENGTH];

	int fontSize;
	int fontWeight;

	vgui::Font *font;
	int ownFontPointer; // true if the font is ours to delete

	// scheme
	byte fgColor[4];
	byte bgColor[4];
	byte armedFgColor[4];
	byte armedBgColor[4]; 
	byte mousedownFgColor[4];
	byte mousedownBgColor[4];
	byte borderColor[4];

	// construction/destruction
	CScheme();
	~CScheme();
};

CSchemeManager::CScheme::CScheme()
{
	schemeName[0] = 0;
	fontName[0] = 0;
	fontSize = 0;
	fontWeight = 0;
	font = NULL;
	ownFontPointer = false;
}

CSchemeManager::CScheme::~CScheme()
{
	// only delete our font pointer if we own it
	if ( ownFontPointer )
	{
		delete font;
	}
}

//-----------------------------------------------------------------------------
// Purpose: resolution information
//			!! needs to be shared out
//-----------------------------------------------------------------------------
static int g_ResArray[] =
{
	320,
	400,
	512,
	640,
	800,
	1024,
	1152,
	1280,
	1600
};
static int g_NumReses = sizeof(g_ResArray) / sizeof(int);

static byte *LoadFileByResolution( const char *filePrefix, int xRes, const char *filePostfix )
{
	// find our resolution in the res array
	int resNum = g_NumReses - 1;
	while ( g_ResArray[resNum] > xRes )
	{
		resNum--;

		if ( resNum < 0 )
			return NULL;
	}

	// try open the file
	byte *pFile = NULL;
	while ( 1 )
	{

		// try load
		char fname[256];
		sprintf( fname, "%s%d%s", filePrefix, g_ResArray[resNum], filePostfix );
		pFile = gEngfuncs.COM_LoadFile( fname, 5, NULL );

		if ( pFile )
			break;

		if ( resNum == 0 )
			return NULL;

		resNum--;
	};

	return pFile;
}

static void ParseRGBAFromString( byte colorArray[4], const char *colorVector )
{
	int r, g, b, a;
	sscanf( colorVector, "%d %d %d %d", &r, &g, &b, &a );
	colorArray[0] = r;
	colorArray[1] = g;
	colorArray[2] = b;
	colorArray[3] = a;
}

//-----------------------------------------------------------------------------
// Purpose: initializes the scheme manager
//			loading the scheme files for the current resolution
// Input  : xRes - 
//			yRes - dimensions of output window
//-----------------------------------------------------------------------------
CSchemeManager::CSchemeManager( int xRes, int yRes )
{
	// basic setup
	m_pSchemeList = NULL;
	m_iNumSchemes = 0;

	// find the closest matching scheme file to our resolution
	char token[1024];
	char *pFile = (char*)LoadFileByResolution( "", xRes, "_textscheme.txt" );
	m_xRes = xRes;

	char *pFileStart = pFile;
	
	byte *pFontData;
	int fontFileLength;
	char fontFilename[512];

	//
	// Read the scheme descriptions from the text file, into a temporary array
	// format is simply:
	// <paramName name> = <paramValue>
	//
	// a <paramName name> of "SchemeName" signals a new scheme is being described
	//

	const static int numTmpSchemes = 64;
	static CScheme tmpSchemes[numTmpSchemes];
	memset( tmpSchemes, 0, sizeof(tmpSchemes) );
	int currentScheme = -1;
	CScheme *pScheme = NULL;

	if ( !pFile )
	{
		gEngfuncs.Con_DPrintf( "Unable to find *_textscheme.txt\n");
		goto buildDefaultFont;
	}

	// record what has been entered so we can create defaults from the different values
	bool hasFgColor, hasBgColor, hasArmedFgColor, hasArmedBgColor, hasMouseDownFgColor, hasMouseDownBgColor;

	pFile = gEngfuncs.COM_ParseFile( pFile, token );
	while ( strlen(token) > 0 && (currentScheme < numTmpSchemes) )
	{
		// get the paramName name
		static const int tokenSize = 64;
		char paramName[tokenSize], paramValue[tokenSize];

		strncpy( paramName, token, tokenSize );
		paramName[tokenSize-1] = 0; // ensure null termination

		// get the '=' character
		pFile = gEngfuncs.COM_ParseFile( pFile, token );
		if ( stricmp( token, "=" ) )
		{
			if ( currentScheme < 0 )
			{
				gEngfuncs.Con_Printf( "error parsing font scheme text file at file start - expected '=', found '%s''\n", token );
			}
			else
			{
				gEngfuncs.Con_Printf( "error parsing font scheme text file at scheme '%s' - expected '=', found '%s''\n", tmpSchemes[currentScheme].schemeName, token );
			}
			break;
		}

		// get paramValue
		pFile = gEngfuncs.COM_ParseFile( pFile, token );
		strncpy( paramValue, token, tokenSize );
		paramValue[tokenSize-1] = 0; // ensure null termination
		
		// is this a new scheme?
		if ( !stricmp(paramName, "SchemeName") )
		{
			// setup the defaults for the current scheme
			if ( pScheme )
			{
				// foreground color defaults (normal -> armed -> mouse down)
				if ( !hasFgColor )
				{
					pScheme->fgColor[0] = pScheme->fgColor[1] = pScheme->fgColor[2] = pScheme->fgColor[3] = 255;
				}
				if ( !hasArmedFgColor )
				{
					memcpy( pScheme->armedFgColor, pScheme->fgColor, sizeof(pScheme->armedFgColor) );
				}
				if ( !hasMouseDownFgColor )
				{
					memcpy( pScheme->mousedownFgColor, pScheme->armedFgColor, sizeof(pScheme->mousedownFgColor) );
				}

				// background color (normal -> armed -> mouse down)
				if ( !hasBgColor )
				{
					pScheme->bgColor[0] = pScheme->bgColor[1] = pScheme->bgColor[2] = pScheme->bgColor[3] = 0;
				}
				if ( !hasArmedBgColor )
				{
					memcpy( pScheme->armedBgColor, pScheme->bgColor, sizeof(pScheme->armedBgColor) );
				}
				if ( !hasMouseDownBgColor )
				{
					memcpy( pScheme->mousedownBgColor, pScheme->armedBgColor, sizeof(pScheme->mousedownBgColor) );
				}

				// font size
				if ( !pScheme->fontSize )
				{
					pScheme->fontSize = 17;
				}
				if ( !pScheme->fontName[0] )
				{
					strcpy( pScheme->fontName, "Arial" );
				}
			}

			// create the new scheme
			currentScheme++;
			pScheme = &tmpSchemes[currentScheme];
			hasFgColor = hasBgColor = hasArmedFgColor = hasArmedBgColor = hasMouseDownFgColor = hasMouseDownBgColor = false;

			strncpy( pScheme->schemeName, paramValue, CScheme::SCHEME_NAME_LENGTH );
			pScheme->schemeName[CScheme::SCHEME_NAME_LENGTH-1] = '\0'; // ensure null termination of string
		}

		if ( !pScheme )
		{
			gEngfuncs.Con_Printf( "font scheme text file MUST start with a 'SchemeName'\n");
			break;
		}

		// pull the data out into the scheme
		if ( !stricmp(paramName, "FontName") )
		{
			strncpy( pScheme->fontName, paramValue, CScheme::FONT_NAME_LENGTH );
			pScheme->fontName[CScheme::FONT_NAME_LENGTH-1] = 0;
		}
		else if ( !stricmp(paramName, "FontSize") )
		{
			pScheme->fontSize = atoi( paramValue );
		}
		else if ( !stricmp(paramName, "FontWeight") )
		{
			pScheme->fontWeight = atoi( paramValue );
		}
		else if ( !stricmp(paramName, "FgColor") )
		{
			ParseRGBAFromString( pScheme->fgColor, paramValue );
			hasFgColor = true;
		}
		else if ( !stricmp(paramName, "BgColor") )
		{
			ParseRGBAFromString( pScheme->bgColor, paramValue );
			hasBgColor = true;
		}
		else if ( !stricmp(paramName, "FgColorArmed") )
		{
			ParseRGBAFromString( pScheme->armedFgColor, paramValue );
			hasArmedFgColor = true;
		}	
		else if ( !stricmp(paramName, "BgColorArmed") )
		{
			ParseRGBAFromString( pScheme->armedBgColor, paramValue );
			hasArmedBgColor = true;
		}
		else if ( !stricmp(paramName, "FgColorMousedown") )
		{
			ParseRGBAFromString( pScheme->mousedownFgColor, paramValue );
			hasMouseDownFgColor = true;
		}
		else if ( !stricmp(paramName, "BgColorMousedown") )
		{
			ParseRGBAFromString( pScheme->mousedownBgColor, paramValue );
			hasMouseDownBgColor = true;
		}
		else if ( !stricmp(paramName, "BorderColor") )
		{
			ParseRGBAFromString( pScheme->borderColor, paramValue );
			hasMouseDownBgColor = true;
		}

		// get the new token last, so we now if the loop needs to be continued or not
		pFile = gEngfuncs.COM_ParseFile( pFile, token );
	}

	// free the file
	gEngfuncs.COM_FreeFile( pFileStart );


buildDefaultFont:

	// make sure we have at least 1 valid font
	if ( currentScheme < 0 )
	{
		currentScheme = 0;
		strcpy( tmpSchemes[0].schemeName, "Default Scheme" );
		strcpy( tmpSchemes[0].fontName, "Arial" );
		tmpSchemes[0].fontSize = 0;
		tmpSchemes[0].fgColor[0] = tmpSchemes[0].fgColor[1] = tmpSchemes[0].fgColor[2] = tmpSchemes[0].fgColor[3] = 255;
		tmpSchemes[0].armedFgColor[0] = tmpSchemes[0].armedFgColor[1] = tmpSchemes[0].armedFgColor[2] = tmpSchemes[0].armedFgColor[3] = 255;
		tmpSchemes[0].mousedownFgColor[0] = tmpSchemes[0].mousedownFgColor[1] = tmpSchemes[0].mousedownFgColor[2] = tmpSchemes[0].mousedownFgColor[3] = 255;
	}

	// we have the full list of schemes in the tmpSchemes array
	// now allocate the correct sized list
	m_iNumSchemes = currentScheme + 1; // 0-based index
	m_pSchemeList = new CScheme[ m_iNumSchemes ];

	// copy in the data
	memcpy( m_pSchemeList, tmpSchemes, sizeof(CScheme) * m_iNumSchemes );

	// create the fonts
	for ( int i = 0; i < m_iNumSchemes; i++ )
	{
		m_pSchemeList[i].font = NULL;

		// see if the current font values exist in a previously loaded font
		for ( int j = 0; j < i; j++ )
		{
			// check if the font name, size, and weight are the same
			if ( !stricmp(m_pSchemeList[i].fontName, m_pSchemeList[j].fontName)  
				&& m_pSchemeList[i].fontSize == m_pSchemeList[j].fontSize
				&& m_pSchemeList[i].fontWeight == m_pSchemeList[j].fontWeight )
			{
				// copy the pointer, but mark i as not owning it
				m_pSchemeList[i].font = m_pSchemeList[j].font;
				m_pSchemeList[i].ownFontPointer = false;
			}
		}

		// if we haven't found the font already, load it ourselves
		if ( !m_pSchemeList[i].font )
		{
			fontFileLength = -1;
			pFontData = NULL;

			if(g_CV_BitmapFonts && g_CV_BitmapFonts->value)
			{
				sprintf(fontFilename, "gfx\\vgui\\fonts\\%d_%s.tga", m_xRes, m_pSchemeList[i].schemeName);
				pFontData = gEngfuncs.COM_LoadFile( fontFilename, 5, &fontFileLength );
			}

			m_pSchemeList[i].font = new vgui::Font(
				m_pSchemeList[i].fontName, 
				pFontData,
				fontFileLength,
				m_pSchemeList[i].fontSize, 
				0, 
				0, 
				m_pSchemeList[i].fontWeight, 
				false, 
				false, 
				false, 
				false);
			
			m_pSchemeList[i].ownFontPointer = true;
		}

		// fix up alpha values; VGUI uses 1-A (A=0 being solid, A=255 transparent)
		m_pSchemeList[i].fgColor[3] = 255 - m_pSchemeList[i].fgColor[3];
		m_pSchemeList[i].bgColor[3] = 255 - m_pSchemeList[i].bgColor[3];
		m_pSchemeList[i].armedFgColor[3] = 255 - m_pSchemeList[i].armedFgColor[3];
		m_pSchemeList[i].armedBgColor[3] = 255 - m_pSchemeList[i].armedBgColor[3];
		m_pSchemeList[i].mousedownFgColor[3] = 255 - m_pSchemeList[i].mousedownFgColor[3];
		m_pSchemeList[i].mousedownBgColor[3] = 255 - m_pSchemeList[i].mousedownBgColor[3];
	}
}

//-----------------------------------------------------------------------------
// Purpose: frees all the memory used by the scheme manager
//-----------------------------------------------------------------------------
CSchemeManager::~CSchemeManager()
{
	delete [] m_pSchemeList;
	m_iNumSchemes = 0;
}

//-----------------------------------------------------------------------------
// Purpose: Finds a scheme in the list, by name
// Input  : char *schemeName - string name of the scheme
// Output : SchemeHandle_t handle to the scheme
//-----------------------------------------------------------------------------
SchemeHandle_t CSchemeManager::getSchemeHandle( const char *schemeName )
{
	// iterate through the list
	for ( int i = 0; i < m_iNumSchemes; i++ )
	{
		if ( !stricmp(schemeName, m_pSchemeList[i].schemeName) )
			return i;
	}

	return 0;
}

//-----------------------------------------------------------------------------
// Purpose: always returns a valid scheme handle
// Input  : schemeHandle - 
// Output : CScheme
//-----------------------------------------------------------------------------
CSchemeManager::CScheme *CSchemeManager::getSafeScheme( SchemeHandle_t schemeHandle )
{
	if ( schemeHandle < m_iNumSchemes )
		return m_pSchemeList + schemeHandle;

	return m_pSchemeList;
}


//-----------------------------------------------------------------------------
// Purpose: Returns the schemes pointer to a font
// Input  : schemeHandle - 
// Output : vgui::Font
//-----------------------------------------------------------------------------
vgui::Font *CSchemeManager::getFont( SchemeHandle_t schemeHandle )
{
	return getSafeScheme( schemeHandle )->font;
}

void CSchemeManager::getFgColor( SchemeHandle_t schemeHandle, int &r, int &g, int &b, int &a )
{
	CScheme *pScheme = getSafeScheme( schemeHandle );
	r = pScheme->fgColor[0];
	g = pScheme->fgColor[1];
	b = pScheme->fgColor[2];
	a = pScheme->fgColor[3];
}

void CSchemeManager::getBgColor( SchemeHandle_t schemeHandle, int &r, int &g, int &b, int &a )
{
	CScheme *pScheme = getSafeScheme( schemeHandle );
	r = pScheme->bgColor[0];
	g = pScheme->bgColor[1];
	b = pScheme->bgColor[2];
	a = pScheme->bgColor[3];
}

void CSchemeManager::getFgArmedColor( SchemeHandle_t schemeHandle, int &r, int &g, int &b, int &a )
{
	CScheme *pScheme = getSafeScheme( schemeHandle );
	r = pScheme->armedFgColor[0];
	g = pScheme->armedFgColor[1];
	b = pScheme->armedFgColor[2];
	a = pScheme->armedFgColor[3];
}

void CSchemeManager::getBgArmedColor( SchemeHandle_t schemeHandle, int &r, int &g, int &b, int &a )
{
	CScheme *pScheme = getSafeScheme( schemeHandle );
	r = pScheme->armedBgColor[0];
	g = pScheme->armedBgColor[1];
	b = pScheme->armedBgColor[2];
	a = pScheme->armedBgColor[3];
}

void CSchemeManager::getFgMousedownColor( SchemeHandle_t schemeHandle, int &r, int &g, int &b, int &a )
{
	CScheme *pScheme = getSafeScheme( schemeHandle );
	r = pScheme->mousedownFgColor[0];
	g = pScheme->mousedownFgColor[1];
	b = pScheme->mousedownFgColor[2];
	a = pScheme->mousedownFgColor[3];
}

void CSchemeManager::getBgMousedownColor( SchemeHandle_t schemeHandle, int &r, int &g, int &b, int &a )
{
	CScheme *pScheme = getSafeScheme( schemeHandle );
	r = pScheme->mousedownBgColor[0];
	g = pScheme->mousedownBgColor[1];
	b = pScheme->mousedownBgColor[2];
	a = pScheme->mousedownBgColor[3];
}

void CSchemeManager::getBorderColor( SchemeHandle_t schemeHandle, int &r, int &g, int &b, int &a )
{
	CScheme *pScheme = getSafeScheme( schemeHandle );
	r = pScheme->borderColor[0];
	g = pScheme->borderColor[1];
	b = pScheme->borderColor[2];
	a = pScheme->borderColor[3];
}