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

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.getBlockClumps().size();i++){
		BlockClump&c=gameBoard.getBlockClumps()[i];
		c.vspeed+=gameBoard.gravity*fElapsedTime;
		for (int j=0;j<c.getBlocks().size();j++){
			Block&b=c.getBlocks()[j];
			int col=b.pos.x/12;
			for (int k=0;k<gameBoard.getBlocks(j).size();k++){
				Block&b2=gameBoard.getBlocks(j)[k];
				if (c.getBlockPosition(b).y+12>=b2.pos.y&&c.getBlockPosition(b).y<=b2.pos.y+12){
					c.y=b2.pos.y-12;
					c.vspeed=0;
					gameBoard.removeClump(c);
					i--;
				}
			}
			if (c.getBlockPosition(b).y>=gameBoard.yBottom) {
				c.y=gameBoard.yBottom;
				c.vspeed=0;
				gameBoard.removeClump(c);
				i--;
			}
		}
		applyVelocity:
		for (int j=0;j<c.getBlocks().size();j++){
			Block&b=c.getBlocks()[j];
			c.y+=c.vspeed*fElapsedTime;
			FillRectDecal(c.getBlockPosition(b)+gameBoard.drawOffset,{12,12},DARK_GREEN);
		}
	}
	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];
			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;
}