/***
*
*	Copyright (c) 1996-2002, Valve LLC. All rights reserved.
*	
*	This product contains software technology licensed from Id 
*	Software, Inc. ("Id Technology").  Id Technology (c) 1996 Id Software, Inc. 
*	All Rights Reserved.
*
*   Use, distribution, and modification of this source code and/or resulting
*   object code is restricted to non-commercial enhancements to products from
*   Valve LLC.  All other use, distribution, or modification is prohibited
*   without written permission from Valve LLC.
*
****/
//
// hud_redraw.cpp
//
#include <math.h>
#include "hud.h"
#include "cl_util.h"
#include "triangleapi.h"

#define MAX_LOGO_FRAMES 56

int grgLogoFrame[MAX_LOGO_FRAMES] = 
{
	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 13, 13, 13, 13, 13, 12, 11, 10, 9, 8, 14, 15,
	16, 17, 18, 19, 20, 20, 20, 20, 20, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 
	29, 29, 29, 29, 29, 28, 27, 26, 25, 24, 30, 31 
};


extern int g_iVisibleMouse;

float HUD_GetFOV( void );

extern cvar_t *sensitivity;

// Think
void CHud::Think(void)
{
	int newfov;
	HUDLIST *pList = m_pHudList;

	while (pList)
	{
		if (pList->p->m_iFlags & HUD_ACTIVE)
			pList->p->Think();
		pList = pList->pNext;
	}

	newfov = HUD_GetFOV();
	if ( newfov == 0 )
	{
		m_iFOV = default_fov->value;
	}
	else
	{
		m_iFOV = newfov;
	}

	// the clients fov is actually set in the client data update section of the hud

	// Set a new sensitivity
	if ( m_iFOV == default_fov->value )
	{  
		// reset to saved sensitivity
		m_flMouseSensitivity = 0;
	}
	else
	{  
		// set a new sensitivity that is proportional to the change from the FOV default
		m_flMouseSensitivity = sensitivity->value * ((float)newfov / (float)default_fov->value) * CVAR_GET_FLOAT("zoom_sensitivity_ratio");
	}

	// think about default fov
	if ( m_iFOV == 0 )
	{  // only let players adjust up in fov,  and only if they are not overriden by something else
		m_iFOV = max( default_fov->value, 90 );  
	}
}

//LRC - fog fading values
extern float g_fFadeDuration;
extern float g_fStartDist;
extern float g_fEndDist;
//extern int g_iFinalStartDist;
extern int g_iFinalEndDist;

// Redraw
// step through the local data,  placing the appropriate graphics & text as appropriate
// returns 1 if they've changed, 0 otherwise
int CHud :: Redraw( float flTime, int intermission )
{
	m_fOldTime = m_flTime;	// save time of previous redraw
	m_flTime = flTime;
	m_flTimeDelta = (double)m_flTime - m_fOldTime;
	static int m_flShotTime = 0;

	//LRC - handle fog fading effects. (is this the right place for it?)
	if (g_fFadeDuration)
	{
		// Nicer might be to use some kind of logarithmic fade-in?
		double fFraction = m_flTimeDelta/g_fFadeDuration;
//		g_fStartDist -= (FOG_LIMIT - g_iFinalStartDist)*fFraction;
		g_fEndDist -= (FOG_LIMIT - g_iFinalEndDist)*fFraction;

//		CONPRINT("FogFading: %f - %f, frac %f, time %f, final %d\n", g_fStartDist, g_fEndDist, fFraction, flTime, g_iFinalEndDist);

		// cap it
//		if (g_fStartDist > FOG_LIMIT)				g_fStartDist = FOG_LIMIT;
		if (g_fEndDist   > FOG_LIMIT)				g_fEndDist = FOG_LIMIT;
//		if (g_fStartDist < g_iFinalStartDist)	g_fStartDist = g_iFinalStartDist;
		if (g_fEndDist   < g_iFinalEndDist)		g_fEndDist   = g_iFinalEndDist;
	}
	
	// Clock was reset, reset delta
	if ( m_flTimeDelta < 0 )
		m_flTimeDelta = 0;

	// Bring up the scoreboard during intermission
	/*if (gViewPort)
	{
		if ( m_iIntermission && !intermission )
		{
			// Have to do this here so the scoreboard goes away
			m_iIntermission = intermission;
			gViewPort->HideCommandMenu();
			gViewPort->HideScoreBoard();
			gViewPort->UpdateSpectatorPanel();
		}
		else if ( !m_iIntermission && intermission )
		{
			m_iIntermission = intermission;
			gViewPort->HideCommandMenu();
			gViewPort->HideVGUIMenu();
			gViewPort->ShowScoreBoard();
			gViewPort->UpdateSpectatorPanel();

			// Take a screenshot if the client's got the cvar set
			if ( CVAR_GET_FLOAT( "hud_takesshots" ) != 0 )
				m_flShotTime = flTime + 1.0;	// Take a screenshot in a second
		}
	}*/

	if (m_flShotTime && m_flShotTime < flTime)
	{
		gEngfuncs.pfnClientCmd("snapshot\n");
		m_flShotTime = 0;
	}

	m_iIntermission = intermission;

	// if no redrawing is necessary
	// return 0;
	
	if ( m_pCvarDraw->value )
	{
		HUDLIST *pList = m_pHudList;

		while (pList)
		{
			if ( !intermission )
			{
				if ( (pList->p->m_iFlags & HUD_ACTIVE) && !(m_iHideHUDDisplay & HIDEHUD_ALL) )
					pList->p->Draw(flTime);
			}
			else
			{  // it's an intermission,  so only draw hud elements that are set to draw during intermissions
				if ( pList->p->m_iFlags & HUD_INTERMISSION )
					pList->p->Draw( flTime );
			}

			pList = pList->pNext;
		}
	}

	// are we in demo mode? do we need to draw the logo in the top corner?
	if (m_iLogo)
	{
		int x, y, i;

		if (m_hsprLogo == 0)
			m_hsprLogo = LoadSprite("sprites/%d_logo.spr");

		SPR_Set(m_hsprLogo, 250, 250, 250 );
		
		x = SPR_Width(m_hsprLogo, 0);
		x = ScreenWidth - x;
		y = SPR_Height(m_hsprLogo, 0)/2;

		// Draw the logo at 20 fps
		int iFrame = (int)(flTime * 20) % MAX_LOGO_FRAMES;
		i = grgLogoFrame[iFrame] - 1;

		SPR_DrawAdditive(i, x, y, NULL);
	}

	/*
	if ( g_iVisibleMouse )
	{
		void IN_GetMousePos( int *mx, int *my );
		int mx, my;

		IN_GetMousePos( &mx, &my );
		
		if (m_hsprCursor == 0)
		{
			char sz[256];
			sprintf( sz, "sprites/cursor.spr" );
			m_hsprCursor = SPR_Load( sz );
		}

		SPR_Set(m_hsprCursor, 250, 250, 250 );
		
		// Draw the logo at 20 fps
		SPR_DrawAdditive( 0, mx, my, NULL );
	}
	*/

	return 1;
}

void ScaleColors( int &r, int &g, int &b, int a )
{
	float x = (float)a / 255;
	r = (int)(r * x);
	g = (int)(g * x);
	b = (int)(b * x);
}

const unsigned char colors[8][3] =
{
{127, 127, 127}, // additive cannot be black
{255,   0,   0},
{  0, 255,   0},
{255, 255,   0},
{  0,   0, 255},
{  0, 255, 255},
{255,   0, 255},
{240, 180,  24}
};

int CHud::DrawHudString( int xpos, int ypos, int iMaxX, char *szIt, int r, int g, int b )
{
	if( hud_textmode->value == 2 )
	{
		gEngfuncs.pfnDrawSetTextColor( r / 255.0, g / 255.0, b / 255.0 );
		return gEngfuncs.pfnDrawConsoleString( xpos, ypos, szIt );
	}

	// xash3d: reset unicode state
	TextMessageDrawChar( 0, 0, 0, 0, 0, 0 );

	// draw the string until we hit the null character or a newline character
	for( ; *szIt != 0 && *szIt != '\n'; szIt++ )
	{
		int w = gHUD.m_scrinfo.charWidths['M'];
		if( xpos + w  > iMaxX )
			return xpos;
		if( ( *szIt == '^' ) && ( *( szIt + 1 ) >= '0') && ( *( szIt + 1 ) <= '7') )
		{
			szIt++;
			r = colors[*szIt - '0'][0];
			g = colors[*szIt - '0'][1];
			b = colors[*szIt - '0'][2];
			if( !*(++szIt) )
			return xpos;
		}
		int c = (unsigned int)(unsigned char)*szIt;

		xpos += TextMessageDrawChar( xpos, ypos, c, r, g, b );
	}

	return xpos;
}

int CHud::DrawHudStringLen( char *szIt )
{
	int l = 0;
	for( ; *szIt != 0 && *szIt != '\n'; szIt++ )
	{
		l += gHUD.m_scrinfo.charWidths[(unsigned char)*szIt];
	}
	return l;
}

int CHud :: DrawHudNumberString( int xpos, int ypos, int iMinX, int iNumber, int r, int g, int b )
{
	char szString[32];
	sprintf( szString, "%d", iNumber );
	return DrawHudStringReverse( xpos, ypos, iMinX, szString, r, g, b );

}

// draws a string from right to left (right-aligned)
int CHud :: DrawHudStringReverse( int xpos, int ypos, int iMinX, char *szString, int r, int g, int b )
{
	char *szIt;
	// find the end of the string
	for ( szIt = szString; *szIt != 0; szIt++ )
	{ // we should count the length?		
	}

	// iterate throug the string in reverse
	for ( szIt--;  szIt != (szString-1);  szIt-- )	
	{
		int next = xpos - gHUD.m_scrinfo.charWidths[ *szIt ]; // variable-width fonts look cool
		if ( next < iMinX )
			return xpos;
		xpos = next;

		TextMessageDrawChar( xpos, ypos, *szIt, r, g, b );
	}

	return xpos;
}

int CHud :: DrawHudNumber( int x, int y, int iFlags, int iNumber, int r, int g, int b)
{
	int iWidth = GetSpriteRect(m_HUD_number_0).right - GetSpriteRect(m_HUD_number_0).left;
	int k;
	
	if (iNumber > 0)
	{
		// SPR_Draw 100's
		if (iNumber >= 100)
		{
			 k = iNumber/100;
			SPR_Set(GetSprite(m_HUD_number_0 + k), r, g, b );
			SPR_DrawAdditive( 0, x, y, &GetSpriteRect(m_HUD_number_0 + k));
			x += iWidth;
		}
		else if (iFlags & (DHN_3DIGITS))
		{
			//SPR_DrawAdditive( 0, x, y, &rc );
			x += iWidth;
		}

		// SPR_Draw 10's
		if (iNumber >= 10)
		{
			k = (iNumber % 100)/10;
			SPR_Set(GetSprite(m_HUD_number_0 + k), r, g, b );
			SPR_DrawAdditive( 0, x, y, &GetSpriteRect(m_HUD_number_0 + k));
			x += iWidth;
		}
		else if (iFlags & (DHN_3DIGITS | DHN_2DIGITS))
		{
			//SPR_DrawAdditive( 0, x, y, &rc );
			x += iWidth;
		}

		// SPR_Draw ones
		k = iNumber % 10;
		SPR_Set(GetSprite(m_HUD_number_0 + k), r, g, b );
		SPR_DrawAdditive(0,  x, y, &GetSpriteRect(m_HUD_number_0 + k));
		x += iWidth;
	} 
	else if (iFlags & DHN_DRAWZERO) 
	{
		SPR_Set(GetSprite(m_HUD_number_0), r, g, b );

		// SPR_Draw 100's
		if (iFlags & (DHN_3DIGITS))
		{
			//SPR_DrawAdditive( 0, x, y, &rc );
			x += iWidth;
		}

		if (iFlags & (DHN_3DIGITS | DHN_2DIGITS))
		{
			//SPR_DrawAdditive( 0, x, y, &rc );
			x += iWidth;
		}

		// SPR_Draw ones
		
		SPR_DrawAdditive( 0,  x, y, &GetSpriteRect(m_HUD_number_0));
		x += iWidth;
	}

	return x;
}


int CHud::GetNumWidth( int iNumber, int iFlags )
{
	if (iFlags & (DHN_3DIGITS))
		return 3;

	if (iFlags & (DHN_2DIGITS))
		return 2;

	if (iNumber <= 0)
	{
		if (iFlags & (DHN_DRAWZERO))
			return 1;
		else
			return 0;
	}

	if (iNumber < 10)
		return 1;

	if (iNumber < 100)
		return 2;

	return 3;

}	

void CHud::DrawDarkRectangle( int x, int y, int wide, int tall )
{
	//gEngfuncs.pTriAPI->RenderMode( kRenderTransTexture );
	gEngfuncs.pfnFillRGBABlend( x, y, wide, tall, 0, 0, 0, 255 * 0.6 );
	FillRGBA( x + 1, y, wide - 1, 1, 255, 140, 0, 255 );
	FillRGBA( x, y, 1, tall - 1, 255, 140, 0, 255 );
	FillRGBA( x + wide - 1, y + 1, 1, tall - 1, 255, 140, 0, 255 );
	FillRGBA( x, y + tall - 1, wide - 1, 1, 255, 140, 0, 255 );
}