#include "GameManager.h"

static pascal void Timer(EventLoopTimerRef r, void * d)
{
	#pragma unused(r)
	VGame * g;
	UnsignedWide microseconds;
	float interval;
	Vector front, push;
	
	g = (VGame *)d;
	
	microseconds = UpTime();
	interval = (10000.0 / (microseconds.lo - g->lastTime.lo));
	g->lastTime = microseconds;
	
	if(g->Status == MENU)
	{
		glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
		
		RunInterface(&g->Interface, interval);
		DrawInterface(&g->Interface);
		
		if(g->w.IsFullScreen)
			aglSwapBuffers(g->w.FullScreen);
		else
			aglSwapBuffers(g->w.Windowed);
		return;
	}
	
	g->Frames++;
	
	if(TickCount() - g->FrameTimer > 60)
	{
		g->FrameTimer = TickCount();
		g->FramesPerSecond = g->Frames;
		g->Frames = 0;
	}
	
	if (!g->Paused)
	{
  	RunWorld(&g->world, interval);
	}
	
	glClear(GL_DEPTH_BUFFER_BIT);
	glLoadIdentity();
	
	ForwardsVector(&g->world.Camera, 1.0, &front);
	push = front;
	if (g->Direction & STOP) {
	  StopShip(&g->world.Physics, (SHIPACCELERATION / interval));
	} else if (g->Direction & FORWARDS) {
  	push.x *= (SHIPACCELERATION / interval);
		push.y *= (SHIPACCELERATION / interval);
		push.z *= (SHIPACCELERATION / interval);
		PushShip(&g->world.Physics, &push);
	} else if (g->Direction & BACKWARDS) {
  	push.x *= -(SHIPACCELERATION / interval);
		push.y *= -(SHIPACCELERATION / interval);
		push.z *= -(SHIPACCELERATION / interval);
		PushShip(&g->world.Physics, &push);
	}
	TurnShip(&g->world.Physics, g->Rotation, interval);
	
	DrawWorld(&g->world, interval);
	
	if(g->w.IsFullScreen)
		aglSwapBuffers(g->w.FullScreen);
	else
		aglSwapBuffers(g->w.Windowed);
	
	if(g->world.Finished)
		SwitchMode(g, MENU);
}

static void ResumeGame(VGame * g)
{
	g->lastTime = UpTime();
	g->FrameTimer = TickCount();
	if (g->Status != MENU && g->w.IsFullScreen) HideCursor();
	else ShowCursor();
}

static pascal OSStatus MenuSelected(EventHandlerCallRef r, 
	EventRef e, void * d)
{
	#pragma unused(r)
	VGame * g;
	HICommand TheCommand;
	g = (VGame *)d;
	
	GetEventParameter(e, kEventParamDirectObject, typeHICommand, NULL, 
		sizeof(HICommand), NULL, &TheCommand);
	
	switch(TheCommand.commandID)
	{
		case 'FScn':
			if (g->w.IsFullScreen) {
				CreateWindowedContext(&g->w);
				ShowCursor();
				if (g->Status == PLAYING && g->Paused) {
					glClear(GL_DEPTH_BUFFER_BIT);
					DrawWorld(&g->world, 1.0);
					aglSwapBuffers(g->w.Windowed);
				}
			} else {
				CreateFullScreenContext(&g->w);
				if (g->Status != MENU) HideCursor();
				if (g->Paused) {
					glClear(GL_DEPTH_BUFFER_BIT);
					DrawWorld(&g->world, 1.0);
					aglSwapBuffers(g->w.FullScreen);
				}
			}
			
			return noErr;
			break;
		case 'EndG':
			if (g->Status == PLAYING) {
			  SwitchMode(g, MENU);
			}
			break;
		case kHICommandAbout:
			OpenAboutWindow(&g->m);
			return noErr;
			break;
		case kHICommandPreferences:
			OpenSettingsWindow(&g->Settings);
			return noErr;
			break;
	}
	return eventNotHandledErr;
}

static pascal OSStatus KeyDown(EventHandlerCallRef nextEvent, EventRef theEvent, void * userData) {
	#pragma unused (nextEvent)
	VGame * g;
	VSettings * s;
	unsigned char charCode;
	UInt32 modifiers;
	SInt16 key;
	
	g = (VGame *) userData;
	s = GetSettings();
	GetEventParameter(theEvent, kEventParamKeyMacCharCodes, typeChar, NULL, sizeof(char), NULL, &charCode);
	GetEventParameter(theEvent, kEventParamKeyModifiers, typeUInt32, NULL, sizeof(UInt32), NULL, &modifiers);
	key = KeyWithModifiers(charCode, modifiers);
	if (charCode == 27)
	{ /* Escape */
		if (g->w.IsFullScreen) {
			CreateWindowedContext(&g->w);
			ShowCursor();
			if (g->Status == PLAYING && g->Paused) {
				glClear(GL_DEPTH_BUFFER_BIT);
				DrawWorld(&g->world, 1.0);
				aglSwapBuffers(g->w.Windowed);
			}
		}
	}
	
	if(charCode == 0x9)
	{
		FindTarget(&g->world);
	}
	
	if (g->Status != PLAYING) return eventNotHandledErr;
	if (SettingsIsEquivalentKey(s, key, s->Left)) {
		g->Rotation &= ~RIGHT;
		g->Rotation |= LEFT;
	}
	if (SettingsIsEquivalentKey(s, key, s->Right)) {
		g->Rotation &= ~LEFT;
		g->Rotation |= RIGHT;
	}
	if (SettingsIsEquivalentKey(s, key, s->Up)) {
		g->Rotation &= ~DOWN;
		g->Rotation |= UP;
	}
	if (SettingsIsEquivalentKey(s, key, s->Down)) {
		g->Rotation &= ~UP;
		g->Rotation |= DOWN;
	}
	if (SettingsIsEquivalentKey(s, key, s->Forward)) {
		g->Direction = FORWARDS;
	}
	if (SettingsIsEquivalentKey(s, key, s->Backward)) {
		g->Direction = BACKWARDS;
	}
	if (SettingsIsEquivalentKey(s, key, s->Brake)) {
		g->Direction |= STOP;
	}
	if (SettingsIsEquivalentKey(s, key, s->Bullet)) {
	  AddWeapon(&g->world, WEAPONTYPEBULLET);
	}
	if (SettingsIsEquivalentKey(s, key, s->Rocket)) {
		AddWeapon(&g->world, WEAPONTYPEROCKET);
	}
	if (SettingsIsEquivalentKey(s, key, s->Pause)) {
	  if (g->Paused) {
      //SetEventLoopTimerNextFireTime(g->timerRef, (kEventDurationSecond / 120.0));
      ResumeGame(g);
	  } else {
      //SetEventLoopTimerNextFireTime(g->timerRef, kEventDurationForever);
      InitCursor();
	  }
	  g->Paused = !g->Paused;
	  g->world.Console.Paused = g->Paused;
	}
	
	return eventNotHandledErr;
}

static pascal OSStatus KeyUp(EventHandlerCallRef nextEvent, EventRef theEvent, void * userData) {
	#pragma unused(nextEvent)
	VGame * g;
	VSettings * s;
	unsigned char charCode;
	
	g = (VGame *) userData;
	s = GetSettings();
	GetEventParameter(theEvent, kEventParamKeyMacCharCodes, typeChar, NULL, sizeof(char), NULL, &charCode);
	if (g->Status != PLAYING) return eventNotHandledErr;
	if (charCode == (s->Left & 0xFF)) {
		g->Rotation &= ~LEFT;
	}
	if (charCode == (s->Right & 0xFF)) {
		g->Rotation &= ~RIGHT;
	}
	if (charCode == (s->Up & 0xFF)) {
		g->Rotation &= ~UP;
	}
	if (charCode == (s->Down & 0xFF)) {
		g->Rotation &= ~DOWN;
	}
	if (charCode == (s->Forward & 0xFF) || charCode == (s->Backward & 0xFF)) {
		g->Direction &= ~(FORWARDS | BACKWARDS);
	}
	if (charCode == (s->Brake & 0xFF)) {
		g->Direction &= ~STOP;
	}
	
	return eventNotHandledErr;
}

static pascal OSStatus AppActivated(EventHandlerCallRef nextEvent, EventRef theEvent, void * userData) {
	#pragma unused(nextEvent, theEvent)
	VGame * g;
	
	g = (VGame *) userData;
	if (!g->Paused) SetEventLoopTimerNextFireTime(g->timerRef, (kEventDurationSecond / 120.0));
	ResumeGame(g);
	return eventNotHandledErr;
}

static pascal OSStatus AppDeactivated(EventHandlerCallRef nextEvent, EventRef theEvent, void * userData) {
	#pragma unused(nextEvent, theEvent)
	VGame * g;
	
	g = (VGame *) userData;
	SetEventLoopTimerNextFireTime(g->timerRef, kEventDurationForever);
	ShowCursor();
	return eventNotHandledErr;
}

void InitGame(VGame * g)
{
	EventTypeSpec eventType;
	
	InitCursor();
	InstallEventLoopTimer(GetMainEventLoop(), 0, (kEventDurationSecond / 120.0), 
		NewEventLoopTimerUPP(Timer), g, &g->timerRef);
	
	eventType.eventClass = kEventClassCommand;
	eventType.eventKind = kEventProcessCommand;
	InstallEventHandler(GetApplicationEventTarget(), 
		NewEventHandlerUPP(MenuSelected), 1, &eventType, g, NULL);
	eventType.eventClass = kEventClassKeyboard;
	eventType.eventKind = kEventRawKeyDown;
	InstallApplicationEventHandler(NewEventHandlerUPP(KeyDown), 1, &eventType, g, NULL);
	eventType.eventClass = kEventClassKeyboard;
	eventType.eventKind = kEventRawKeyUp;
	InstallApplicationEventHandler(NewEventHandlerUPP(KeyUp), 1, &eventType, g, NULL);
	eventType.eventClass = kEventClassApplication;
	eventType.eventKind = kEventAppActivated;
	InstallApplicationEventHandler(NewEventHandlerUPP(AppActivated), 1, &eventType, g, NULL);
	eventType.eventClass = kEventClassApplication;
	eventType.eventKind = kEventAppDeactivated;
	InstallApplicationEventHandler(NewEventHandlerUPP(AppDeactivated), 1, &eventType, g, NULL);
	
	SetQDGlobalsRandomSeed(TickCount());
	
	InitSettings(&g->Settings);
	InitMenu(&g->m);
	InitWindow(&g->w);
	InitInterface(&g->Interface, &g->w, g);
	
	g->Status = MENU;
	SetOrtho(&g->w);
	g->w.quitOnClose = true;
	g->lastTime = UpTime();
	g->Paused = false;
	g->Frames = 0;
	g->FramesPerSecond = -1;
	g->FrameTimer = TickCount();
}

void RunGame(VGame * g)
{
	InitGame(g);
	RunApplicationEventLoop();
	CleanUpGame(g);
}

void CleanUpGame(VGame * g)
{
	RemoveEventLoopTimer(g->timerRef);

	CleanUpWindow(&g->w);
	CleanUpMenu(&g->m);
	CleanUpSettings(&g->Settings);
}

void SwitchMode(VGame * g, int Mode)
{
	g->Status = Mode;
	if(Mode == MENU)
	{
		SetOrtho(&g->w);
		ShowCursor();
		CleanUpWorld(&g->world);
		CleanUpConsole(&g->world.Console);
	} else if(Mode == PLAYING)
	{
		SetPerspective(&g->w);
		InitWorld(&g->world);
		InitConsole(&g->world.Console, &g->world.Player, &g->FramesPerSecond);
		g->Direction = STATIONARY;
		g->Rotation = STATIONARY;
		g->lastTime = UpTime();
		g->Paused = false;
		g->Frames = 0;
		g->FramesPerSecond = -1;
		g->FrameTimer = TickCount();
	}
}