//v0.6 - 10th march, 2019
//Revision History

//v0.2
//v0.3
//v0.4 Fix compile
//v0.5 Update DMaps after Levels in Link Active
//v0.6 Move locations.clear() to Link active, because that array data is not available
//		early enough in the engine for Link init. (Engine bug.)


script typedef screendata struct;
script typedef screendata class;

struct script locations
{
	enum{ curDMAP, curSCREEN, curLEVEL, pvsDMAP, pvsSCREEN, pvsLEVEL, locLAST};
	int data[locLAST];
	void run(){}
	void clear() { for ( int q = 0; q < locLAST; ++q ) data[q] = 0; }
	bool changed() { return ( Game->GetCurDMap() != data[curDMAP] || Game->GetCurScreen() != data[curSCREEN] ); }
	bool dmapchanged() { return ( Game->GetCurDMap() != data[curDMAP] ); }
	bool screenchanged() { return ( Game->GetCurScreen() != data[curSCREEN] ); }
	bool levelchanged() { return ( Game->GetCurLevel() != data[curLEVEL] ); }
	int priorDMap() { return ( data[pvsDMAP] ); }
	void update()
	{
		data[pvsSCREEN] = data[curSCREEN];
		data[pvsDMAP] = data[curDMAP];
		data[curSCREEN] = Game->GetCurScreen();
		data[curDMAP] = Game->GetCurDMap();
	}
	void update_dmap()
	{
		data[pvsDMAP] = data[curDMAP];
		data[curDMAP] = Game->GetCurDMap();
	}
	void update_level()
	{
		data[pvsLEVEL] = data[curLEVEL];
		data[curLEVEL] = Game->GetCurLevel();
	}
	void update_screen()
	{
		data[pvsSCREEN] = data[curSCREEN];
		data[curSCREEN] = Game->GetCurScreen();
	}
	
}

class script screenintros
{
	const int REGISTER = 6;
	const int BIT = 2;
	void run(){}
	void clear()
	{
		for ( int q = 0; q < 0x80; ++q )
		{
			SetScreenDBit(locations.data[locations.pvsDMAP], q, REGISTER, BIT, false);
		}
	}
	void update()
	{
	
		if ( locations.levelchanged() )
		{
			locations.update_level();
			locations.update_dmap();
			clear(); //Re-display after changing dmaps, like DMap intros repeat, but for screens.
		}
	}
}

link script active
{
	void run()
	{
		locations.clear();
		locations.clear(); //Call twice to push the previous screen down. 
		while(1)
		{
			screenintros.update();
			
			Waitframe();
		}
	}
}

//Does not repeat if you revisit the screen, unless you change dmaps. 
ffc script screenmessage
{

	const int REGISTER = 6;
	const int BIT = 2;
	const int DELAY_DEFAULT = 20;
	void run(int delay, int reg, int bit )
	{
		reg = ( reg > 0 ) ? reg : REGISTER;
		bit = ( bit > 0 ) ? reg : BIT;
		delay = ( delay > 0 ) ? delay : DELAY_DEFAULT;
		
		while(1)
		{
			if ( !(GetScreenDBit(Game->GetCurDMap(), Game->GetCurScreen(), reg, bit)) )
			{
				Waitframes(delay);
				Screen->Message(Screen->String);
				SetScreenDBit(Game->GetCurDMap(), Game->GetCurScreen(), reg, bit, true);
			}
			Waitframe();
		}
	}
}

link script init
{
	void run()
	{
		//locations.clear();
		//locations.clear(); //Call twice to push the previous screen down. 
	}
}

///////////////////////////
/// NPC Script Room Guy ///
/// v0.3                ///
/// 8th March, 2019     ///
/// By: ZoriaRPG        ///
///////////////////////////

//ZQuest Screen Menu Sets Options
//Set Screen->String to the string to display
//Set Screen->Catchall to the delay time, if the roomtype is none.
//Otherwise, you can set a default delay on the enemy using D0. 

//v0.2 Initial Fixes
//v0.3 Added Once Only Behavioural Flag

npc script screenguy
{
	const int DELAY = 20; //Time to spawn. 
	const int BFLAG_ONCE = 4;
	const int REGISTER = 6;
	const int BIT = 2;
	void run(int delay, int reg, int bit)
	{
		delay = this->InitD[0] > 0 ? delay : DELAY;
		reg = this->InitD[1] > 0 ? reg : REGISTER;
		bit = this->InitD[2] > 0 ? bit : BIT;
		
		if ( !Screen->RoomType )
		{
			if ( Screen->Catchall )
			{
				delay = Screen->Catchall;
			}
		}
		this->CollDetection = false;
		//this->DrawYOffset = -32768;
		//Waitframes(Screen->Catchall); //might be in use depending on room type
		Waitframes(delay);
		
		if ( this->BFlags[BFLAG_ONCE] ) 
		{
			if ( !(GetScreenDBit(Game->GetCurDMap(), Game->GetCurScreen(), reg, bit)) )
			{
				Screen->Message(Screen->String);
				SetScreenDBit(Game->GetCurDMap(), Game->GetCurScreen(), reg, bit, true);
			}
		}
		else Screen->Message(Screen->String);
	}
}