package lab08_sol;

public class CellGrid
{
	private boolean[][] cells;
	private int maxRows;
	private int maxCols;
	public CellGrid(int mRows, int mCols)
	{
		maxRows = mRows;
		maxCols = mCols;
		cells = new boolean[mRows][mCols];
		for(int i = 0; i < mRows; i++)
			for(int j = 0; j < mCols; j++)
				cells[i][j] = false;
	}

	public boolean[][] getCells() {
		return cells;
	}

	public void randomStart()
	{
		java.util.Random random = new java.util.Random();
		for(int i = 0; i < maxRows; i++)
			for(int j = 0; j < maxCols; j++)
				cells[i][j] = random.nextBoolean();
	}
	public void applyUpdate()
	{
		int[][] neighbors = new int[maxRows][maxCols];
		int topCol=maxCols-1;
		int topRow=maxRows-1;
		for(int i=0; i<maxRows;i++) {
			for(int j=0; j<maxCols; j++) {
				// Fill in neighbors[i][j]
				neighbors[i][j]=0;
				if (i>0 && j>0 && cells[i-1][j-1]) neighbors[i][j]++;
				if (i>0 && cells[i-1][j]) neighbors[i][j]++;
				if (i>0 && j<topCol && cells[i-1][j+1]) neighbors[i][j]++;
				if (j>0 && cells[i][j-1]) neighbors[i][j]++;
				if (j<topCol && cells[i][j+1]) neighbors[i][j]++;
				if (i<topRow && j>0 && cells[i+1][j-1]) neighbors[i][j]++;
				if (i<topRow && cells[i+1][j]) neighbors[i][j]++;
				if (i<topRow && j<topCol && cells[i+1][j+1]) neighbors[i][j]++;
			}
		}
		// Now, update cells
		for(int i=0;i<maxRows;i++) {
			for(int j=0;j<maxCols;j++) {
				if (!cells[i][j] && neighbors[i][j]==3) cells[i][j]=true;
				else if (cells[i][j] && neighbors[i][j]>3) cells[i][j]=false;
				else if (cells[i][j] && neighbors[i][j]<2) cells[i][j]=false;			
			}
		}
		
	}

	public void gosperStart() {
		for(int i = 0; i < maxRows; i++)
			for(int j = 0; j < maxCols; j++)
				cells[i][j] = false;
		cells[5][1] = true;
		cells[5][2] = true;
		cells[6][1] = true;
		cells[6][2] = true;
		cells[1][25] = true;
		cells[2][23] = true;
		cells[2][25] = true;
		cells[3][13] = true;
		cells[3][14] = true;
		cells[3][21] = true;
		cells[3][22] = true;
		cells[3][35] = true;
		cells[3][36] = true;
		cells[4][12] = true;
		cells[4][16] = true;
		cells[4][21] = true;
		cells[4][22] = true;
		cells[4][35] = true;
		cells[4][36] = true;
		cells[5][11] = true;
		cells[5][17] = true;
		cells[5][21] = true;
		cells[5][22] = true;
		cells[6][11] = true;
		cells[6][15] = true;
		cells[6][17] = true;
		cells[6][18] = true;
		cells[6][23] = true;
		cells[6][25] = true;
		cells[7][11] = true;
		cells[7][17] = true;
		cells[7][25] = true;
		cells[8][12] = true;
		cells[8][16] = true;
		cells[9][13] = true;
		cells[9][14] = true;
	}

	public void gliderStart() {
		for(int i = 0; i < maxRows; i++)
			for(int j = 0; j < maxCols; j++)
				cells[i][j] = false;
		cells[1][3] = true;
		cells[2][4] = true;
		cells[3][2] = true;
		cells[3][3] = true;
		cells[3][4] = true;
	}
}