#define OLC_PGE_APPLICATION
#include "pixelGameEngine.h"
#include "Meteos.h"
#include <random>

Meteos*game;

bool Meteos::OnUserCreate()
{
	game=this;

	std::random_device rd;  //Will be used to obtain a seed for the random number engine
    gen=std::mt19937(rd()); //Standard mersenne_twister_engine seeded with rd()
    randBlockPos=std::uniform_int_distribution<>(0, 9);

	gameBoard=Board({10,14},12.f,3.0f);
	return true;
}

bool Meteos::OnUserUpdate(float fElapsedTime)
{
	lastBlockSpawn+=fElapsedTime;
	if (lastBlockSpawn>=3.0f){
		lastBlockSpawn-=3.0f;
		gameBoard.spawnBlock(randBlockPos(gen));
	}
	Clear(Pixel(32,32,255));
	for (int x=-1;x<=gameBoard.boardSize.x;x++) {
		for (int y=0;y<=gameBoard.boardSize.y;y++) {
			if (x==-1||x==10||y==14) {
				FillRectDecal({(float)(gameBoard.drawOffset.x+x*12),(float)(gameBoard.drawOffset.y+y*12)},{12,12},Pixel(0,0,0,255));
			} else {
				DrawRectDecal({(float)(gameBoard.drawOffset.x+x*12),(float)(gameBoard.drawOffset.y+y*12)},{12,12},Pixel(255,255,255,64));
			}
		}
	}
	for (int i=0;i<gameBoard.boardSize.x;i++) {
		for (int y=0;y<gameBoard.getBlocks(i).size();y++) {
			Block&b=gameBoard.getBlocks(i)[y];
			if (b.pos.y<gameBoard.yBottom) {
				b.vspeed+=gameBoard.gravity*fElapsedTime;
				bool collisionDetected=false;
				for (int yy=y-1;yy>=0;yy--) {
					Block&b2=gameBoard.getBlocks(i)[yy];
					if (b.pos.y+12>b2.pos.y) {
						collisionDetected=true;
						b.vspeed=0;
						b.pos.y=b2.pos.y-12;
						break;
					}
				}
				if (!collisionDetected) {
					b.pos.y+=b.vspeed*fElapsedTime;
				}
			} else {
				b.vspeed=0;
				b.pos.y=gameBoard.yBottom;
			}
			FillRectDecal(b.pos+gameBoard.drawOffset,{12,12},GREEN);
		}
	}
	return true;
}

int main()
{
	Meteos instance;
	if (instance.Construct(256, 240, 4, 4))
		instance.Start();
	return 0;
}