//Name: image_read.c
//Author: Price Poston
//Purpose: To open an image file and read integer values.
#include <stdio.h>
#include <stdlib.h>

void read_header(FILE *fp, int *x, int *y);

void read_image_body(FILE *fp, int **img);

int **read_image(char *img, int x, int y);

int get_image_pixel(int **img, int x, int y);

void set_image_pixel(int **img, int x, int y, int set);

int main(int argc, char *argv[])
{
	int x = 0, y = 0, **img;
	//FILE *fp;
	//fp = fopen(argv[1], "r+");
	/*if(fp == NULL)
	{
		printf("Failed to open file");
		return -1;//Checks to see if file was opened.
	}
	printf("file opened\n");*/
	img = read_image(argv[1], x, y);
	while((x!=-1)&&(y!=-1))
	{
		printf("Please enter a pixel value (x, y): ");
		scanf("%d%d", &x, &y);
		//printf("%d\n", img[x][y]);
	}

	//fclose(fp);
	return 0;
}

void read_header(FILE *fp, int *x, int *y)
{
	int max;
	//Reads the header of the file.
	while(fgetc(fp)!='\n');
	while(fgetc(fp)!='\n');
	//fscanf(fp, "%d%d", x, y);
	fscanf(fp, "%d", x);
	fscanf(fp, "%d", y);
}

void read_image_body(FILE *fp, int **img)
{
	//Reads the body of the image.
	int col=0, row=0;
	read_header(fp, &col, &row);
	for(int i = 0;i<row;i++)
	{
		for(int j = 0; j<col;j++)
		{
			fscanf(fp, "%d", &img[i][j]);
		}
	}
}

int **read_image(char *img, int x, int y)
{
	//Reads the entire image file and returns the body of the image
	int **body;
	printf("read image\n");
	//body = malloc(sizeof(int)*24*7);
	FILE *fp;
	fp = fopen(img, "r");
	/*if(fp == NULL)
	{
		printf("file not opened\n");
		return &&-1;//Checks to see if file was opened.
	}*/
		printf("file opened\n");
	read_image_body(fp, body);

	fclose(fp);
	return body;
}

int get_image_pixel(int **img, int x, int y)
{
	//gets the image pixel.
	return img[x][y];
}

void set_image_pixel(int **img, int x, int y, int set)
{
	//sets the image pixel.
	img[x][y] = 0;
}