#include "fracture.h"

FILE *get_file(const char *prefix, unsigned int width, unsigned int crack,
							 double beta, unsigned int iter, unsigned int num_iter,
							 unsigned int num, bool read) {
	int prefix_len = strlen(prefix);
	int width_len = 1 + (int)log10(width);
	int crack_len;
	if (crack != 0) {
		crack_len = 1 + (int)log10(crack);
	} else {
		crack_len = 1;
	}
	int beta_len;
	if (beta > 1) {
		beta_len = 1 + (int)log10(beta) + 3;
	} else {
		beta_len = 4;
	}
	int iter_len = 1 + (int)log10(num_iter);
	int num_len = 1 + (int)log10(num);
	int num_underscores = 5;

	int len = prefix_len + width_len + crack_len + beta_len + iter_len + num_len +
						num_underscores + 4;

	char filename[len + 1];
	snprintf(filename, sizeof(filename), "%s_%u_%u_%.2f_%0*u_%u.txt", prefix,
					 width, crack, beta, iter_len, iter + 1, num);

	char *mode = "w";
	if (read) {
		mode = "r";
	}
	FILE *file = fopen(filename, mode);
	return file;
}