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

Meteos*game;

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

	SPRITES["blocks_test.png"].Load("assets/blocks_test.png");

	std::random_device rd;  //Will be used to obtain a seed for the random number engine
    gen=std::mt19937(0); //Standard mersenne_twister_engine seeded with rd()
    randBlockPos=std::uniform_int_distribution<>(0, 9);
    coinFlip=std::uniform_int_distribution<>(0, 1);

	gameBoard=Board({10,14},0.04f,1.2f,-1.f,1.7f,2.0f,1.0f,{3,3,0,0,0,0,0,0,0,0},SPRITES["blocks_test.png"]);

	return true;
}

bool Meteos::OnUserUpdate(float fElapsedTime)
{
	accumulatedTime+=fElapsedTime;
	if (accumulatedTime>=1/60.0f) {
		updateGame(1/60.0f);
		accumulatedTime=0;
	}
	drawGame(fElapsedTime);
	return true;
}

void Meteos::updateGame(float fElapsedTime){
	lastBlockSpawn+=fElapsedTime;
	if (lastBlockSpawn>=gameBoard.spawnRate){
		lastBlockSpawn-=gameBoard.spawnRate;
		gameBoard.spawnBlock(randBlockPos(gen));
	}
	for (int i=0;i<gameBoard.getBlockClumps().size();i++){
		BlockClump&c=gameBoard.getBlockClumps()[i];
		if (c.launchTime>0) {
			c.launchTime-=fElapsedTime;
		} else 
		if (c.landTime>0) {
			c.landTime-=fElapsedTime;
			if (c.landTime<=0) {
				c.landTime=0;
				for (int j=0;j<c.getBlocks().size();j++){
					if (c.getBlocks()[j].col==BlockColor::LAUNCHED) {
						gameBoard.assignRandomColor(c.getBlocks()[j]);
					}
				}
			}
		} else {
			c.vspeed+=gameBoard.gravity;
		}
		if (c.vspeed>gameBoard.maxGravity){
			c.vspeed=gameBoard.maxGravity;
		}
		for (int j=0;j<gameBoard.getBlockClumps().size();j++) {
			if (i==j) continue;
			BlockClump&c2=gameBoard.getBlockClumps()[j];
			for (int k=0;k<c2.getBlocks().size();k++) {
				Block&b2=c2.getBlocks()[k];
				for (int l=0;l<c.getBlocks().size();l++) {
					Block&b3=c.getBlocks()[l];
					if (c2.getBlockPosition(b2).x==c.getBlockPosition(b3).x&&
						c2.getBlockPosition(b2).y+12>=c.getBlockPosition(b3).y&&
						c2.getBlockPosition(b2).y<=c.getBlockPosition(b3).y+12) {
						
						if (c2.getBlockPosition(b2).y>c.getBlockPosition(b3).y) {
							c.y-=12-(c2.getBlockPosition(b2).y-c.getBlockPosition(b3).y);
						} else {
							c2.y-=12-(c.getBlockPosition(b3).y-c2.getBlockPosition(b2).y);
						}
						float influence=(float)c.getBlocks().size()/(c.getBlocks().size()+c2.getBlocks().size());
						int blockCount=c.getBlocks().size();
						//Copy every block from one clump to the other
						for (int m=0;m<c2.getBlocks().size();m++) {
							Block&b4=c2.getBlocks()[m];
							c.addBlock(b4.pos.x/12,(c2.getBlockPosition(b4).y-c.y)/12,b4.col);
						}
						if (blockCount+c2.getBlocks().size()!=c.getBlocks().size()) {
							std::cout<<"Block size is: "<<c.getBlocks().size()<<" but expected "<<blockCount+c2.getBlocks().size()<<std::endl;
							assert(false);
						}
						if (c.vspeed>0) {
							c.vspeed/=4;
						}
						if (c2.vspeed>0) {
							c2.vspeed/=4;
						}
						c.vspeed=c.vspeed*influence+c2.vspeed*(1-influence);
						c.sortBlocks();
						gameBoard.removeClump(j--);
						goto nextClumpCollisionCheck;
					}
				}
			}
		}
		nextClumpCollisionCheck:;
		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(col).size();k++){
				Block&b2=gameBoard.getBlocks(col)[k];
				if (c.getBlockPosition(b).y+12>=b2.pos.y&&c.getBlockPosition(b).y<=b2.pos.y+12){
					c.y-=c.getBlockPosition(b).y+12-b2.pos.y;
					c.vspeed=0;
					gameBoard.convertClump(i--);
					goto nextClump;
				}
			}
			if (c.getBlockPosition(b).y>=gameBoard.yBottom) {
				c.y-=c.getBlockPosition(b).y-gameBoard.yBottom;
				c.vspeed=0;
				gameBoard.convertClump(i--);
				goto nextClump;
			}
		}
		nextClump:;
	}
	for (BlockClump&c:gameBoard.getBlockClumps()){
		std::vector<int>matchedBlockIDs;
		for (Block&b:c.getBlocks()) {
			b.addedToLaunchList=false;
		}
		for (int i=0;i<c.getBlocks().size();i++) {
			Block&b=c.getBlocks()[i];
			std::vector<int>tempMatchIDsX;
			std::vector<int>tempMatchIDsY;
			float targetX=b.pos.x;
			float targetY=b.pos.y;
			bool found=false;
			tempMatchIDsX.push_back(i);
			tempMatchIDsY.push_back(i);
			rightCheck:
			float checkX=targetX+12;
			float checkY=targetY;
			do{
				found=false;
				for (int j=0;j<c.getBlocks().size();j++){
					Block&b2=c.getBlocks()[j];
					if (i==j)continue;
					if (b.col==b2.col&&b2.col!=BlockColor::LAUNCHED&&b2.pos.x==checkX&&b2.pos.y==checkY) {
						found=true;
						checkX+=12;
						tempMatchIDsX.push_back(j);
						break;
					}
				}
			}while(found);
			leftCheck:
			checkX=targetX-12;
			checkY=targetY;
			do{
				found=false;
				for (int j=0;j<c.getBlocks().size();j++){
					Block&b2=c.getBlocks()[j];
					if (i==j)continue;
					if (b.col==b2.col&&b2.col!=BlockColor::LAUNCHED&&b2.pos.x==checkX&&b2.pos.y==checkY) {
						found=true;
						checkX-=12;
						tempMatchIDsX.push_back(j);
						break;
					}
				}
			}while(found);
			upCheck:
			checkX=targetX;
			checkY=targetY-12;
			do{
				found=false;
				for (int j=0;j<c.getBlocks().size();j++){
					Block&b2=c.getBlocks()[j];
					if (i==j)continue;
					if (b.col==b2.col&&b2.col!=BlockColor::LAUNCHED&&b2.pos.x==checkX&&b2.pos.y==checkY) {
						found=true;
						checkY-=12;
						tempMatchIDsY.push_back(j);
						break;
					}
				}
			}while(found);
			downCheck:
			checkX=targetX;
			checkY=targetY+12;
			do{
				found=false;
				for (int j=0;j<c.getBlocks().size();j++){
					Block&b2=c.getBlocks()[j];
					if (i==j)continue;
					if (b.col==b2.col&&b2.col!=BlockColor::LAUNCHED&&b2.pos.x==checkX&&b2.pos.y==checkY) {
						found=true;
						checkY+=12;
						tempMatchIDsY.push_back(j);
						break;
					}
				}
			}while(found);
			if (tempMatchIDsX.size()>2||tempMatchIDsY.size()>2) {
				if (tempMatchIDsX.size()>2) {
					for (int i:tempMatchIDsX) {
						Block&bb=c.getBlocks()[i];
						if (!bb.addedToLaunchList) {
							bb.addedToLaunchList=true;
							matchedBlockIDs.push_back(i);
						}
					}
				}
				if (tempMatchIDsY.size()>2) {
					for (int i:tempMatchIDsY) {
						Block&bb=c.getBlocks()[i];
						if (!bb.addedToLaunchList) {
							bb.addedToLaunchList=true;
							matchedBlockIDs.push_back(i);
						}
					}
				}
			}
		}
		for (int i:matchedBlockIDs) {
			Block&b=c.getBlocks()[i];
			b.col=BlockColor::LAUNCHED;
			c.vspeed=gameBoard.launchSpd;
			c.launchTime=gameBoard.launchTime;
		}
	}
	std::vector<std::pair<int,int>>matchedBlockIDs; //Col followed by index
	for (int i=0;i<gameBoard.boardSize.x;i++){
		for (Block&b:gameBoard.getBlocks(i)) {
			b.addedToLaunchList=false;
		}
		for (int j=0;j<gameBoard.getBlocks(i).size();j++) {
			Block&b=gameBoard.getBlocks(i)[j];
			std::vector<std::pair<int,int>>tempMatchIDsX; //Col followed by index
			std::vector<std::pair<int,int>>tempMatchIDsY; //Col followed by index
			float targetX=b.pos.x;
			float targetY=b.pos.y;
			bool found=false;
			tempMatchIDsX.push_back({i,j});
			tempMatchIDsY.push_back({i,j});
			rightBoardCheck:
			float checkX=1;
			float checkY=targetY;
			do{
				found=false;
				if (i+checkX<gameBoard.boardSize.x) {
					for (int k=0;k<gameBoard.getBlocks(i+checkX).size();k++){
						Block&b2=gameBoard.getBlocks(i+checkX)[k];
						if (b.col==b2.col&&b2.col!=BlockColor::LAUNCHED&&b2.pos.x==b.pos.x+checkX*12&&b2.pos.y==checkY) {
							found=true;
							tempMatchIDsX.push_back({i+checkX,k});
							checkX++;
							break;
						}
					}
				}
			}while(found);
			leftBoardCheck:
			checkX=-1;
			checkY=targetY;
			do{
				found=false;
				if (i+checkX>=0) {
					for (int k=0;k<gameBoard.getBlocks(i+checkX).size();k++){
						Block&b2=gameBoard.getBlocks(i+checkX)[k];
						if (b.col==b2.col&&b2.col!=BlockColor::LAUNCHED&&b2.pos.x==b.pos.x+checkX*12&&b2.pos.y==checkY) {
							found=true;
							tempMatchIDsX.push_back({i+checkX,k});
							checkX--;
							break;
						}
					}
				}
			}while(found);
			upBoardCheck:
			checkX=targetX;
			checkY=targetY-12;
			do{
				found=false;
				for (int k=0;k<gameBoard.getBlocks(i).size();k++){
					Block&b2=gameBoard.getBlocks(i)[k];
					if (j==k)continue;
					if (b.col==b2.col&&b2.col!=BlockColor::LAUNCHED&&b2.pos.x==checkX&&b2.pos.y==checkY) {
						found=true;
						checkY-=12;
						tempMatchIDsY.push_back({i,k});
						break;
					}
				}
			}while(found);
			downBoardCheck:
			checkX=targetX;
			checkY=targetY+12;
			do{
				found=false;
				for (int k=0;k<gameBoard.getBlocks(i).size();k++){
					Block&b2=gameBoard.getBlocks(i)[k];
					if (j==k)continue;
					if (b.col==b2.col&&b2.col!=BlockColor::LAUNCHED&&b2.pos.x==checkX&&b2.pos.y==checkY) {
						found=true;
						checkY+=12;
						tempMatchIDsY.push_back({i,k});
						break;
					}
				}
			}while(found);
			if (tempMatchIDsX.size()>2||tempMatchIDsY.size()>2) {
				if (tempMatchIDsX.size()>2) {
					for (std::pair<int,int>&info:tempMatchIDsX) {
						Block&bb=gameBoard.getBlocks(info.first)[info.second];
						if (!bb.addedToLaunchList) {
							bb.addedToLaunchList=true;
							matchedBlockIDs.push_back(info);
						}
					}
				}
				if (tempMatchIDsY.size()>2) {
					for (std::pair<int,int>&info:tempMatchIDsY) {
						Block&bb=gameBoard.getBlocks(info.first)[info.second];
						if (!bb.addedToLaunchList) {
							bb.addedToLaunchList=true;
							matchedBlockIDs.push_back(info);
						}
					}
				}
			}
		}
	}
	if (matchedBlockIDs.size()>0) {
		BlockClump c;
		bool firstBlock=true;
		int baseBlockPos;
		for (std::pair<int,int>&info:matchedBlockIDs) {
			Block&b=gameBoard.getBlocks(info.first)[info.second];
			if (firstBlock) {
				baseBlockPos=b.pos.y;
				c.y=baseBlockPos-1;
				firstBlock=false;
			}
			b.col=BlockColor::LAUNCHED;
			c.vspeed=gameBoard.launchSpd;
			c.launchTime=gameBoard.launchTime;
		}
		for (std::pair<int,int>&info:matchedBlockIDs) {
			Block&b=gameBoard.getBlocks(info.first)[info.second];
			for (Block&b2:gameBoard.getBlocks(b.pos.x/12)) {
				if (!b2.markedForRemoval&&b2.pos.y<=b.pos.y) {
					c.addBlock(b.pos.x/12,(b2.pos.y-baseBlockPos)/12,b2.col);
					b2.markedForRemoval=true;
				}
			}
		}
		gameBoard.addClump(c);
	}
	for (int i=0;i<gameBoard.getBlockClumps().size();i++){ //Resolve BlockClump movements.
		BlockClump&c=gameBoard.getBlockClumps()[i];
		if (c.vspeed<0) {
			for (int j=0;j<c.getBlocks().size();j++){
				Block&b=c.getBlocks()[j];
				if (c.getBlockPosition(b).y<0){
					c.removeBlock(j--);
					break;
				}
			}
		}
		c.y+=c.vspeed;
	}
	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.markedForRemoval){
				gameBoard.removeBlock(i,y--);
				continue;
			}
			b.addedToLaunchList=false;
		}
	}
}

void Meteos::drawGame(float fElapsedTime){
	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];
		for (int j=0;j<c.getBlocks().size();j++){
			Block&b=c.getBlocks()[j];
			if (b.resetTime>0) {
				b.resetTime-=fElapsedTime;
				if (b.resetTime<0) {
					b.resetTime=0;
					if (b.col==BlockColor::LAUNCHED) {
						gameBoard.assignRandomColor(b);
					}
				}
			}
			DrawPartialDecal(c.getBlockPosition(b)+gameBoard.drawOffset,gameBoard.tileset,{(float)(int)b.col*12,0},{12,12});
		}
	}
	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.resetTime>0) {
				b.resetTime-=fElapsedTime;
				if (b.resetTime<0) {
					b.resetTime=0;
					if (b.col==BlockColor::LAUNCHED) {
						gameBoard.assignRandomColor(b);
					}
				}
			}
			DrawPartialDecal(b.pos+gameBoard.drawOffset,gameBoard.tileset,{(float)(int)b.col*12,0},{12,12});
		}
	}
}

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