/*
 
 Copyright (C) 2009 Id Software, Inc.
 
 This program 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 2
 of the License, or (at your option) any later version.
 
 This program 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 this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
 */

#include "../wolfiphone.h"

hud_t	huds;

void HudDraw();

void HudWrite();

void HudRead();

hudPic_t	*dragHud;
int			dragX, dragY;

void SetHudPic( hudPic_t *hp, const char *image ) {
	texture_t *gl;
	gl = TM_FindTexture( image, TT_Pic );
	assert( gl );
	hp->glTexNum = gl->texnum;
}

void SetHudSpot( hudPic_t *hp, int x, int y, int w, int h, int flags ) {
	hp->x = x;
	hp->y = y;
	hp->width = w;
	hp->height = h;
	hp->hudFlags = flags;
}

void HudSetTexnums() {
	SetHudPic( &huds.forwardStick, "iphone/up_down.tga" );
	SetHudPic( &huds.sideStick, "iphone/side_2_side.tga" );
	SetHudPic( &huds.turnStick, "iphone/diractional_03.tga" );
	SetHudPic( &huds.fire, "iphone/shoot.tga" );
	SetHudPic( &huds.menu, "iphone/menu.tga" );
	SetHudPic( &huds.map, "iphone/map.tga" );
	SetHudPic( &huds.ammo, "iphone/9.tga" );
	
#ifdef ALLOW_MAP_VIEW_HUD	
	// Special setup for mapView texture since it's a scratch texture.
	texture_t *gl = TM_AllocateTexture( "_mapView" );
	huds.mapView.glTexNum = gl->texnum;
	R_Bind( huds.mapView.glTexNum );
	pfglTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, 64, 64, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL );
	pfglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
	pfglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
	GLubyte *yellow = malloc( 64 * 4 );
	for( int i = 0; i < 64; i++ ) {
		yellow[ i * 4 + 0 ] = 255;
		yellow[ i * 4 + 1 ] = 255;
		yellow[ i * 4 + 2 ] = 0;
		yellow[ i * 4 + 3 ] = 128;
	}
	for( int i = 0; i < 64; i++ ) {
		pfglTexSubImage2D( GL_TEXTURE_2D, 0, 0, i, 64, 1, GL_RGBA, GL_UNSIGNED_BYTE, yellow );
	}
#endif	
}

void HudSetForScheme( int schemeNum ) {
	switch ( schemeNum ) {
		default:
		case 0:
			SetHudSpot( &huds.forwardStick, 0, 320-100, 100, 100, 0 );
			SetHudSpot( &huds.sideStick, 0, 320-100, 100, 100, HF_DISABLED );
			SetHudSpot( &huds.turnStick, 0, 320-100, 100, 100, 0 );
			SetHudSpot( &huds.fire, 480-80, 320-80, 80, 80, 0 );
			SetHudSpot( &huds.menu, 480-64, 0, 64, 32, 0 );
			SetHudSpot( &huds.map, 0, 0, 64, 32, 0 );
			SetHudSpot( &huds.ammo, 480-80, 320-100-44, 80, 44, 0 );
			break;
		case 1:
			SetHudSpot( &huds.forwardStick, 480-100, 320-100, 100, 100, 0 );
			SetHudSpot( &huds.sideStick, 0, 320-100, 100, 100, HF_DISABLED );
			SetHudSpot( &huds.turnStick, 480-100, 320-100, 100, 100, 0 );
			SetHudSpot( &huds.fire, 0, 320-80, 80, 80, 0 );
			SetHudSpot( &huds.menu, 480-64, 0, 64, 32, 0 );
			SetHudSpot( &huds.map, 0, 0, 64, 32, 0 );
			SetHudSpot( &huds.ammo, 480-80, 320-100-44, 80, 44, 0 );
			break;
		case 2:
			SetHudSpot( &huds.forwardStick, 0, 320-100, 100, 100, 0 );
			SetHudSpot( &huds.sideStick, 0, 320-100, 100, 100, 0 );
			SetHudSpot( &huds.turnStick, 480-100, 320-100, 100, 100, 0 );
			SetHudSpot( &huds.fire, 480-80, 0, 80, 80, 0 );
			SetHudSpot( &huds.menu, 0, 32, 64, 32, 0 );
			SetHudSpot( &huds.map, 0, 0, 64, 32, 0 );
			SetHudSpot( &huds.ammo, 480-80, 80, 80, 44, 0 );
			break;
		case 3:
			SetHudSpot( &huds.forwardStick, 480-100, 320-100, 100, 100, 0 );
			SetHudSpot( &huds.sideStick, 480-100, 320-100, 100, 100, 0 );
			SetHudSpot( &huds.turnStick, 0, 320-100, 100, 100, 0 );
			SetHudSpot( &huds.fire, 480-80, 0, 80, 80, 0 );
			SetHudSpot( &huds.menu, 0, 32, 64, 32, 0 );
			SetHudSpot( &huds.map, 0, 0, 64, 32, 0 );
			SetHudSpot( &huds.ammo, 480-80, 80, 80, 44, 0 );
			break;
	}
	
#ifdef ALLOW_MAP_VIEW_HUD	
	SetHudSpot( &huds.mapView, 240-64, 0, 128, 128, 0 );
	huds.mapView.hudFlags |= HF_DISABLED;
#endif	
}

void SnapSticks( hudPic_t *test, const hudPic_t *to ) {
	if ( test->x < to->x + to->width && test->x + test->width > to->x
		&& test->y < to->y + to->height && test->y + test->height > to->y ) {
		test->x = to->x;
		test->y = to->y;
	}
}

/*
 ==================
 HudEditFrame
 
 ==================
 */
void HudEditFrame() {
	int		w;
	int		x;
	colour3_t gray = { 32, 32, 32 };
	
	iphoneSetNotifyText( "Drag the controls" );
	
	if ( numTouches == 0 && numPrevTouches == 1 && dragHud ) {
		// if it was released near the center, make it inactive
		int x = prevTouches[0][0];
		int y = prevTouches[0][1];
		if ( x > 120 && x < 360 && y > 80 && y < 240 ) {
			dragHud->hudFlags |= HF_DISABLED;			
		} else {
			// magnet pull a matchable axis if it is close enough
			if ( dragHud == &huds.forwardStick ) {
				SnapSticks( &huds.sideStick, dragHud );
				SnapSticks( &huds.turnStick, dragHud );				
			} 
			if ( dragHud == &huds.sideStick ) {
				SnapSticks( &huds.forwardStick, dragHud );
			} 
			if ( dragHud == &huds.turnStick ) {
				SnapSticks( &huds.forwardStick, dragHud );
			} 
		}
		Sound_StartLocalSound( "iphone/baction_01.wav" );
		dragHud = NULL;
	}
	
	if ( numTouches == 1 && numPrevTouches == 0 ) {
		// identify the hud being touched for drag
		int x = touches[0][0];
		int y = touches[0][1];
		dragHud = NULL;
		for ( hudPic_t *hud = (hudPic_t *)&huds ; hud != (hudPic_t *)(&huds+1) ; hud++ ) {
			if ( x >= hud->x && x - hud->x < hud->width && 
				y >= hud->y && y - hud->y < hud->height ) {
				dragHud = hud;
				dragX = dragHud->x - x;
				dragY = dragHud->y - y;
				Sound_StartLocalSound( "iphone/bdown_01.wav" );
				dragHud->hudFlags &= ~HF_DISABLED;
				break;
			}
		}
	}
	
	if ( numTouches == 1 && numPrevTouches == 1 && dragHud ) {
		// adjust the position of the dragHud
		dragHud->x = touches[0][0] + dragX;
		dragHud->y = touches[0][1] + dragY;
		if ( dragHud->x < 0 ) {
			dragHud->x = 0;
		}
		if ( dragHud->x > 480 - dragHud->width ) {
			dragHud->x = 480 - dragHud->width;
		}
		if ( dragHud->y < 0 ) {
			dragHud->y = 0;
		}
		if ( dragHud->y > 320 - dragHud->height ) {
			dragHud->y = 320 - dragHud->height;
		}
	}
	
	// layout the disabled items in the center
	w = 0;
	for ( hudPic_t *hud = (hudPic_t *)&huds ; hud != (hudPic_t *)(&huds+1) ; hud++ ) {
		if ( hud->hudFlags & HF_DISABLED ) {
			w += hud->width;
		}
	}
	x = 240 - w / 2;
	
	for ( hudPic_t *hud = (hudPic_t *)&huds ; hud != (hudPic_t *)(&huds+1) ; hud++ ) {
		if ( hud->hudFlags & HF_DISABLED ) {
			hud->x = x;
			hud->y = 160-hud->height/2;
			x += hud->width;
		 }
	 }

	// decide where the menu button, map button, and ammo will draw
	
	// solid background color and some UI elements for context
	R_Draw_Fill( 0, 0, 480, 320, gray );	
	iphoneDrawFace();
	iphoneDrawNotifyText();
	
	// draw the active items at their current locations
	for ( hudPic_t *hud = (hudPic_t *)&huds ; hud != (hudPic_t *)(&huds+1) ; hud++ ) {
		if ( hud->hudFlags & HF_DISABLED ) {
			pfglColor3f( 0.5, 0.5, 0.5 );
		}
		if ( hud == &huds.ammo ) {
			iphoneDrawNumber( huds.ammo.x + huds.ammo.width / 2, huds.ammo.y, 99, 48, 48 );
		} else {
			iphoneDrawPicNum( hud->x, hud->y, hud->width, hud->height, hud->glTexNum );
		}
		pfglColor3f( 1, 1, 1 );
	}
	
	// draw the done button
	if ( iphoneDrawPicWithTouch( 240-32, 320-80-32, 64, 32, "iphone/button_back.tga" ) ) {
		menuState = IPM_CONTROLS;
		iphoneSetNotifyText( "" );
	}
 }