//========= Copyright (c) 1996-2005, Valve Corporation, All rights reserved. ============//
//
// Purpose: 
//
// $NoKeywords: $
//
//=============================================================================//
#include "quakedef.h"
#include "cdll_int.h"
#include "draw.h"
#include "tmessage.h"
#include "common.h"
#include "characterset.h"
#include "mem_fgets.h"
#include "tier0/icommandline.h"
#include "tier0/platform.h"

// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"

#define MSGFILE_NAME		0
#define MSGFILE_TEXT		1
#define MAX_MESSAGES		600			// I don't know if this table will balloon like every other feature in Half-Life
										// But, for now, I've set this to a reasonable value
// Defined in other files.
static characterset_t	g_WhiteSpace;

client_textmessage_t	gMessageParms;
client_textmessage_t	*gMessageTable = NULL;
int						gMessageTableCount = 0;

char	gNetworkTextMessageBuffer[MAX_NETMESSAGE][512];
const char *gNetworkMessageNames[MAX_NETMESSAGE] = { NETWORK_MESSAGE1, NETWORK_MESSAGE2, NETWORK_MESSAGE3, NETWORK_MESSAGE4, NETWORK_MESSAGE5, NETWORK_MESSAGE6 };

client_textmessage_t	gNetworkTextMessage[MAX_NETMESSAGE] = 
{
	0, // effect
	255,255,255,255,
	255,255,255,255,
	-1.0f, // x
	-1.0f, // y
	0.0f, // fadein
	0.0f, // fadeout
	0.0f, // holdtime
	0.0f, // fxTime,
	NULL,//pVGuiSchemeFontName (NULL == default)
	NETWORK_MESSAGE1,  // pName message name.
	gNetworkTextMessageBuffer[0]    // pMessage
};

char	gDemoMessageBuffer[512];
client_textmessage_t tm_demomessage =
{
	0, // effect
	255,255,255,255,
	255,255,255,255,
	-1.0f, // x
	-1.0f, // y
	0.0f, // fadein
	0.0f, // fadeout
	0.0f, // holdtime
	0.0f, // fxTime,
	NULL,// pVGuiSchemeFontName (NULL == default)
	DEMO_MESSAGE,  // pName message name.
	gDemoMessageBuffer    // pMessage
};

static client_textmessage_t orig_demo_message = tm_demomessage;

static void TextMessageParse( byte *pMemFile, int fileSize );

// The string "pText" is assumed to have all whitespace from both ends cut out
int IsComment( char *pText )
{
	if ( pText )
	{
		int length = strlen( pText );

		if ( length >= 2 && pText[0] == '/' && pText[1] == '/' )
			return 1;
		
		// No text?
		if ( length > 0 )
			return 0;
	}
	// No text is a comment too
	return 1;
}


// The string "pText" is assumed to have all whitespace from both ends cut out
int IsStartOfText( char *pText )
{
	if ( pText )
	{
		if ( pText[0] == '{' )
			return 1;
	}
	return 0;
}


// The string "pText" is assumed to have all whitespace from both ends cut out
int IsEndOfText( char *pText )
{
	if ( pText )
	{
		if ( pText[0] == '}' )
			return 1;
	}
	return 0;
}


#if 0
int IsWhiteSpace( char space )
{
	if ( space == ' ' || space == '\t' || space == '\r' || space == '\n' )
		return 1;
	return 0;
}
#else

#define IsWhiteSpace(space)		IN_CHARACTERSET( g_WhiteSpace, space )
#endif


const char *SkipSpace( const char *pText )
{
	if ( pText )
	{
		int pos = 0;
		while ( pText[pos] && IsWhiteSpace( pText[pos] ) )
			pos++;
		return pText + pos;
	}

	return NULL;
}


const char *SkipText( const char *pText )
{
	if ( pText )
	{
		int pos = 0;
		while ( pText[pos] && !IsWhiteSpace( pText[pos] ) )
			pos++;
		return pText + pos;
	}

	return NULL;
}


int ParseFloats( const char *pText, float *pFloat, int count )
{
	const char *pTemp = pText;
	int index = 0;

	while ( pTemp && count > 0 )
	{
		// Skip current token / float
		pTemp = SkipText( pTemp );
		// Skip any whitespace in between
		pTemp = SkipSpace( pTemp );
		if ( pTemp )
		{
			// Parse a float
			pFloat[index] = (float)atof( pTemp );
			count--;
			index++;
		}
	}

	if ( count == 0 )
		return 1;

	return 0;
}

int ParseString( char const *pText, char *buf, size_t bufsize )
{
	const char *pTemp = pText;

	// Skip current token / float
	pTemp = SkipText( pTemp );
	// Skip any whitespace in between
	pTemp = SkipSpace( pTemp );
	
	if ( pTemp )
	{
		char const *pStart = pTemp;
		pTemp = SkipText( pTemp );

		int len =  MIN( pTemp - pStart + 1, (int)bufsize - 1 );
		Q_strncpy( buf, pStart, len );
		buf[ len ] = 0;
		return 1;
	}

	return 0;
}


// Trims all whitespace from the front and end of a string
void TrimSpace( const char *source, char *dest )
{
	int start, end, length;

	start = 0;
	end = strlen( source );

	while ( source[start] && IsWhiteSpace( source[start] ) )
		start++;

	end--;
	while ( end > 0 && IsWhiteSpace( source[end] ) )
		end--;

	end++;

	length = end - start;
	if ( length > 0 )
		memcpy( dest, source + start, length );
	else
		length = 0;

	// Terminate the dest string
	dest[ length ] = 0;
}


int IsToken( const char *pText, const char *pTokenName )
{
	if ( !pText || !pTokenName )
		return 0;

	if ( StringHasPrefix( pText+1, pTokenName ) )
		return 1;
	
	return 0;
}

static char g_pchSkipName[ 64 ];

int ParseDirective( const char *pText )
{
	if ( pText && pText[0] == '$' )
	{
		float tempFloat[8];

		if ( IsToken( pText, "position" ) )
		{
			if ( ParseFloats( pText, tempFloat, 2 ) )
			{
				gMessageParms.x = tempFloat[0];
				gMessageParms.y = tempFloat[1];
			}
		}
		else if ( IsToken( pText, "effect" ) )
		{
			if ( ParseFloats( pText, tempFloat, 1 ) )
			{
				gMessageParms.effect = (int)tempFloat[0];
			}
		}
		else if ( IsToken( pText, "fxtime" ) )
		{
			if ( ParseFloats( pText, tempFloat, 1 ) )
			{
				gMessageParms.fxtime = tempFloat[0];
			}
		}
		else if ( IsToken( pText, "color2" ) )
		{
			if ( ParseFloats( pText, tempFloat, 3 ) )
			{
				gMessageParms.r2 = (int)tempFloat[0];
				gMessageParms.g2 = (int)tempFloat[1];
				gMessageParms.b2 = (int)tempFloat[2];
			}
		}
		else if ( IsToken( pText, "color" ) )
		{
			if ( ParseFloats( pText, tempFloat, 3 ) )
			{
				gMessageParms.r1 = (int)tempFloat[0];
				gMessageParms.g1 = (int)tempFloat[1];
				gMessageParms.b1 = (int)tempFloat[2];
			}
		}
		else if ( IsToken( pText, "fadein" ) )
		{
			if ( ParseFloats( pText, tempFloat, 1 ) )
			{
				gMessageParms.fadein = tempFloat[0];
			}
		}
		else if ( IsToken( pText, "fadeout" ) )
		{
			if ( ParseFloats( pText, tempFloat, 3 ) )
			{
				gMessageParms.fadeout = tempFloat[0];
			}
		}
		else if ( IsToken( pText, "holdtime" ) )
		{
			if ( ParseFloats( pText, tempFloat, 3 ) )
			{
				gMessageParms.holdtime = tempFloat[0];
			}
		}
		else if ( IsToken( pText, "boxsize" ) )
		{
			if ( ParseFloats( pText, tempFloat, 1 ) )
			{
				gMessageParms.bRoundedRectBackdropBox = tempFloat[0] != 0.0f;
				gMessageParms.flBoxSize = tempFloat[0];
			}
		}
		else if ( IsToken( pText, "boxcolor" ) )
		{
			if ( ParseFloats( pText, tempFloat, 4 ) )
			{
				for ( int i = 0; i < 4; ++i )
				{
					gMessageParms.boxcolor[ i ] = (byte)(int)tempFloat[ i ];
				}
			}
		}
		else if ( IsToken( pText, "clearmessage" ) )
		{
			if ( ParseString( pText, g_pchSkipName, sizeof( g_pchSkipName ) ) )
			{
				if ( !g_pchSkipName[ 0 ] || !Q_stricmp( g_pchSkipName, "0" ) )
				{
					gMessageParms.pClearMessage = NULL;
				}
				else
				{
					gMessageParms.pClearMessage = g_pchSkipName;
				}
			}
		}
		else
		{
			ConDMsg("Unknown token: %s\n", pText );
		}

		return 1;
	}
	return 0;
}

#define NAME_HEAP_SIZE 16384

void TextMessageParse( byte *pMemFile, int fileSize )
{
	char		buf[512], trim[512];
	char		*pCurrentText=0, *pNameHeap;
	char		 currentName[512], nameHeap[ NAME_HEAP_SIZE ];
	int			lastNamePos;

	int			mode = MSGFILE_NAME;	// Searching for a message name	
	int			lineNumber, filePos, lastLinePos;
	int			messageCount;

	client_textmessage_t	textMessages[ MAX_MESSAGES ];
	
	int			i, nameHeapSize, textHeapSize, messageSize;
	intp   nameOffset;

	lastNamePos = 0;
	lineNumber = 0;
	filePos = 0;
	lastLinePos = 0;
	messageCount = 0;

	bool bSpew = CommandLine()->FindParm( "-textmessagedebug" ) ? true : false;

	CharacterSetBuild( &g_WhiteSpace, " \r\n\t" );

	while( memfgets( pMemFile, fileSize, &filePos, buf, 512 ) != NULL )
	{
		if(messageCount>=MAX_MESSAGES)
		{
			Sys_Error("tmessage::TextMessageParse : messageCount>=MAX_MESSAGES");
		}

		TrimSpace( buf, trim );
		switch( mode )
		{
		case MSGFILE_NAME:
			if ( IsComment( trim ) )	// Skip comment lines
				break;
			
			if ( ParseDirective( trim ) )	// Is this a directive "$command"?, if so parse it and break
				break;

			if ( IsStartOfText( trim ) )
			{
				mode = MSGFILE_TEXT;
				pCurrentText = (char*)(pMemFile + filePos);
				break;
			}
			if ( IsEndOfText( trim ) )
			{
				ConDMsg("Unexpected '}' found, line %d\n", lineNumber );
				return;
			}
			Q_strncpy( currentName, trim, sizeof( currentName ) );
			break;
		
		case MSGFILE_TEXT:
			if ( IsEndOfText( trim ) )
			{
				int length = strlen(currentName);

				// Save name on name heap
				if ( lastNamePos + length > 8192 )
				{
					ConDMsg("Error parsing file!\n" );
					return;
				}
				Q_strcpy( nameHeap + lastNamePos, currentName );

				// Terminate text in-place in the memory file (it's temporary memory that will be deleted)
				// If the string starts with #, it's a localization string and we don't
				// want the \n (or \r) on the end or the Find() lookup will fail (so subtract 2)
				if ( pCurrentText && pCurrentText[0] && pCurrentText[0] == '#' && lastLinePos > 1 && 
					( ( pMemFile[lastLinePos - 2] == '\n' ) || ( pMemFile[lastLinePos - 2] == '\r' ) ) )
				{
					pMemFile[ lastLinePos - 2 ] = 0;
				}
				else
				{
					pMemFile[ lastLinePos - 1 ] = 0;
				}

				// Save name/text on heap
				textMessages[ messageCount ] = gMessageParms;
				textMessages[ messageCount ].pName = nameHeap + lastNamePos;
				lastNamePos += strlen(currentName) + 1;
				if ( gMessageParms.pClearMessage )
				{
					Q_strncpy( nameHeap + lastNamePos, textMessages[ messageCount ].pClearMessage, Q_strlen( textMessages[ messageCount ].pClearMessage ) + 1 );
					textMessages[ messageCount ].pClearMessage = nameHeap + lastNamePos;
					lastNamePos += Q_strlen( textMessages[ messageCount ].pClearMessage ) + 1;
				}
				textMessages[ messageCount ].pMessage = pCurrentText;

				if ( bSpew )
				{
					client_textmessage_t *m = &textMessages[ messageCount ];
					Msg( "%d %s\n",
						messageCount, m->pName ? m->pName : "(null)" );
					Msg( "  effect %d, color1(%d,%d,%d,%d), color2(%d,%d,%d,%d)\n",
						m->effect, m->r1, m->g1, m->b1, m->a1, m->r2, m->g2, m->b2, m->a2 );
					Msg( "  pos %f,%f, fadein %f fadeout %f hold %f fxtime %f\n",
						m->x, m->y, m->fadein, m->fadeout, m->holdtime, m->fxtime );
					Msg( "  '%s'\n", m->pMessage ? m->pMessage : "(null)" );

					Msg( "  box %s, size %f, color(%d,%d,%d,%d)\n",
						m->bRoundedRectBackdropBox ? "yes" : "no", m->flBoxSize, m->boxcolor[ 0 ], m->boxcolor[ 1 ], m->boxcolor[ 2 ], m->boxcolor[ 3 ] );

					if ( m->pClearMessage )
					{
						Msg( "  will clear '%s'\n", m->pClearMessage );
					}
				}

				messageCount++;

				// Reset parser to search for names
				mode = MSGFILE_NAME;
				break;
			}
			if ( IsStartOfText( trim ) )
			{
				ConDMsg("Unexpected '{' found, line %d\n", lineNumber );
				return;
			}
			break;
		}
		lineNumber++;
		lastLinePos = filePos;

		if ( messageCount >= MAX_MESSAGES )
		{
			ConMsg("WARNING: TOO MANY MESSAGES IN TITLES.TXT, MAX IS %d\n", MAX_MESSAGES );
			break;
		}
	}

	ConDMsg("Parsed %d text messages\n", messageCount );
	nameHeapSize = lastNamePos;
	textHeapSize = 0;
	for ( i = 0; i < messageCount; i++ )
		textHeapSize += strlen( textMessages[i].pMessage ) + 1;


	messageSize = (messageCount * sizeof(client_textmessage_t));

	// Must malloc because we need to be able to clear it after initialization
	gMessageTable = (client_textmessage_t *)malloc( textHeapSize + nameHeapSize + messageSize );
	
	// Copy table over
	memcpy( gMessageTable, textMessages, messageSize );
	
	// Copy Name heap
	pNameHeap = ((char *)gMessageTable) + messageSize;
	memcpy( pNameHeap, nameHeap, nameHeapSize );
	nameOffset = pNameHeap - gMessageTable[0].pName;

	// Copy text & fixup pointers
	pCurrentText = pNameHeap + nameHeapSize;

	for ( i = 0; i < messageCount; i++ )
	{
		gMessageTable[i].pName += nameOffset;		// Adjust name pointer (parallel buffer)
		if ( gMessageTable[ i ].pClearMessage )
		{
			gMessageTable[ i ].pClearMessage += nameOffset;
		}
		Q_strcpy( pCurrentText, gMessageTable[i].pMessage );	// Copy text over
		gMessageTable[i].pMessage = pCurrentText;
		pCurrentText += strlen( pCurrentText ) + 1;
	}

#if _DEBUG
	if ( (pCurrentText - (char *)gMessageTable) != (textHeapSize + nameHeapSize + messageSize) )
		ConMsg("Overflow text message buffer!!!!!\n");
#endif
	gMessageTableCount = messageCount;
}

void TextMessageShutdown( void )
{
	// Clear out any old data that's sitting around.
	if ( gMessageTable )
	{
		free( gMessageTable );
		gMessageTable = NULL;
	}
}

void TextMessageInit( void )
{
	int fileSize;
	byte *pMemFile;

	// Clear out any old data that's sitting around.
	if ( gMessageTable )
	{
		free( gMessageTable );
		gMessageTable = NULL;
	}

	pMemFile = COM_LoadFile( "scripts/titles.txt", 5, &fileSize );

	if ( pMemFile )
	{
		TextMessageParse( pMemFile, fileSize );
		free( pMemFile );
	}

	int i;

	for ( i = 0; i < MAX_NETMESSAGE; i++ )
	{
		gNetworkTextMessage[ i ].pMessage = 
			gNetworkTextMessageBuffer[ i ];
	}
}

void TextMessage_DemoMessage( const char *pszMessage, float fFadeInTime, float fFadeOutTime, float fHoldTime )
{
	if ( !pszMessage || !pszMessage[0] )
		return;
	
	// Restore
	tm_demomessage = orig_demo_message;

	Q_strncpy( gDemoMessageBuffer, (char *)pszMessage, sizeof( gDemoMessageBuffer ) );
	tm_demomessage.fadein   = fFadeInTime;
	tm_demomessage.fadeout  = fFadeOutTime;
	tm_demomessage.holdtime = fHoldTime;
}

//-----------------------------------------------------------------------------
// Purpose: 
// Input  : *pszMessage - 
//			*message - 
//-----------------------------------------------------------------------------
void TextMessage_DemoMessageFull( const char *pszMessage, client_textmessage_t const *message )
{
	Assert( message );
	if ( !message )
		return;

	if ( !pszMessage || !pszMessage[0] )
		return;

	memcpy( &tm_demomessage, message, sizeof( tm_demomessage ) );
	tm_demomessage.pMessage = orig_demo_message.pMessage;
	tm_demomessage.pName = orig_demo_message.pName;
	Q_strncpy( gDemoMessageBuffer, pszMessage, sizeof( gDemoMessageBuffer ) );
}


client_textmessage_t *TextMessageGet( const char *pName )
{
	if (!Q_stricmp( pName, DEMO_MESSAGE ))
		return &tm_demomessage;

	// HACKHACK -- add 4 "channels" of network text
	if (!Q_stricmp( pName, NETWORK_MESSAGE1 ))
		return gNetworkTextMessage;
	else if (!Q_stricmp( pName, NETWORK_MESSAGE2 ))
		return gNetworkTextMessage + 1;
	else if (!Q_stricmp( pName, NETWORK_MESSAGE3 ))
		return gNetworkTextMessage + 2;
	else if (!Q_stricmp( pName, NETWORK_MESSAGE4 ))
		return gNetworkTextMessage + 3;
	else if (!Q_stricmp( pName, NETWORK_MESSAGE5 ))
		return gNetworkTextMessage + 4;
	else if (!Q_stricmp( pName, NETWORK_MESSAGE6 ))
		return gNetworkTextMessage + 5;

	for ( int i = 0; i < gMessageTableCount; i++ )
	{
		if ( !Q_stricmp( pName, gMessageTable[i].pName ) )
			return &gMessageTable[i];
	}

	return NULL;
}