#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <time.h>

#include <SDL2/SDL.h>
#include <SDL2/SDL_video.h>

int startw=1900;
int starth=1100;

void iterate_game(int **grid, int** nextgrid, int cols, int rows){
    for (int i=0; i<cols; i++){
        for(int j=0;j<rows; j++){
            int state=grid[i][j];
            int sum=0;
            for (int k=-1; k<2; k++){
                for (int l=-1; l<2; l++){
                    int col = (i + k + cols) % cols;
                    int row = (j + l + rows) % rows;
                    sum = sum + grid[col][row];
                }
            }

            sum -= grid[i][j];

            if(state==0&sum==3){
                nextgrid[i][j]=1;
            } else if((state==1) & (sum<2 | sum>3)){
                nextgrid[i][j]=0;
            } else {
                nextgrid[i][j]=state;
            }
        }
    }

    for (int i=0; i<cols; i++){
        for(int j=0;j<rows; j++){
            grid[i][j]=nextgrid[i][j];
        }
    }
}

void draw(SDL_Renderer* renderer,SDL_Window* window,int cols, int rows, float mX, float mY, int boxsize, int **grid, int **nextgrid, int width, int height, SDL_Rect *box_rect){
    SDL_SetRenderDrawColor(renderer,0,0,0,255);
    SDL_RenderClear(renderer);

    SDL_SetRenderDrawColor(renderer,150,50,255,255);

	for (int i=0; i<cols; i++){
		for(int j=0;j<rows; j++){
            if(grid[i][j]==1){
                box_rect->x=i*boxsize;
                box_rect->y=j*boxsize;
                SDL_RenderFillRect(renderer,box_rect);
            }
        }
	}
    iterate_game(grid,nextgrid,cols,rows);



	SDL_RenderPresent(renderer);
	SDL_UpdateWindowSurface(window);
}

void mousePressed(int **grid,int x,int y,int size,int cols, int rows, double hue){

}

int main(int argc, char *argv[])
{
	if (SDL_InitSubSystem(SDL_INIT_VIDEO) < 0)
		SDL_Log("SDL fails to initialize! %s\n", SDL_GetError());



	SDL_Window *window = SDL_CreateWindow("SDL Tutorial", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, startw, starth, SDL_WINDOW_SHOWN | SDL_WINDOW_OPENGL);
	if (!window) {
		printf("Failed to create window: %s\n", SDL_GetError());
	}
	SDL_Renderer *renderer = SDL_CreateRenderer(window,-1,SDL_RENDERER_SOFTWARE);
	if (!renderer) {
		printf("Failed to create renderer: %s\n", SDL_GetError());
	}

	int w, h;
	SDL_GetWindowSize(window, &w, &h);
	printf("Window dimensions: %dx%d\n", w, h);

	int boxsize=8;
	int cols=w/boxsize;
	int rows=h/boxsize;
    SDL_Log("cols %d rows %d\n\n\n\n",cols,rows);
	int **grid = (int **)malloc(cols * sizeof(int *));
	for (int i=0; i<cols; i++){
		grid[i]=(int *)malloc(rows * sizeof(int *));
	}

	int **nextgrid = (int **)malloc(cols * sizeof(int *));
	for (int i=0; i<cols; i++){
		nextgrid[i]=(int *)malloc(rows * sizeof(int *));
	}

    srand(time(NULL));
	for (int i=0; i<cols; i++){
		for(int j=0;j<rows; j++){
            grid[i][j]=rand()%2;
            nextgrid[i][j]=rand()%2;
        }
	}

    SDL_Rect box_rect;
    box_rect.w = box_rect.h = boxsize-1;


	draw(renderer,window,cols,rows,0,0,boxsize,grid,nextgrid,w,h,&box_rect);

	bool quit = false;
	SDL_Event e;
	bool mousedown=false;
	int gmouseX=0;
	int gmouseY=0;
    bool ctrl=false;
	while (!quit) {
		while (SDL_PollEvent(&e)) {
			if (e.type == SDL_QUIT) {
				quit = true;
			}
			else if(e.type == SDL_MOUSEBUTTONDOWN){
				if(e.button.button==SDL_BUTTON_LEFT){
					mousedown=true;
				} else if(e.button.button==SDL_BUTTON_RIGHT){
				}
			} else if(e.type==SDL_MOUSEBUTTONUP){
					mousedown=false;
			}

            //SDL_Log("%d\n",e.key.keysym.sym);
            if(e.type==SDL_KEYDOWN&e.key.keysym.sym==1073742048){
                ctrl=true;

            }else if(e.type==SDL_KEYUP&e.key.keysym.sym==1073742048){
                ctrl=false;
            }else if(e.type==SDL_KEYDOWN&e.key.keysym.sym==114&ctrl==true){
                srand(time(NULL));
                for (int i=0; i<cols; i++){
                    for(int j=0;j<rows; j++){
                        grid[i][j]=rand()%2;
                    }
                }
            }


			gmouseX=e.button.x;
			gmouseY=e.button.y;
		}
		float mouseoutX=gmouseX;
		float mouseoutY=gmouseY;
		draw(renderer,window,cols,rows,mouseoutX,mouseoutY,boxsize,grid,nextgrid,w,h,&box_rect);
		//SDL_Delay(10);
	}

	SDL_DestroyWindow(window);
	//free window and windowSurface
	SDL_Quit();
	for (int i=0; i<cols; i++){
        free(grid[i]);
        free(nextgrid[i]);
	}
    free(grid);
    free(nextgrid);

	

	return 0;
}