/*
 * Copyright (C) 2022 Camden Dixie O'Brien
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public
 * License along with this program.  If not, see
 * <https://www.gnu.org/licenses/>.
 */

#include "ds.h"
#include "sud.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define RESNAME "results"
#define SOLNAME "solns"

int main(void)
{
	FILE *rfp, *sfp;
	unsigned solved = 0, errors = 0, i, j;
	char res[NCELLS], sol[NCELLS];
	int allcells;
	double pc;

	rfp = fopen(RESNAME, "rb");
	if (!rfp) {
		fputs("Failed to open results file\n", stderr);
		return EXIT_FAILURE;
	}

	sfp = fopen(SOLNAME, "rb");
	if (!sfp) {
		fputs("Failed to open solutions file\n", stderr);
		return EXIT_FAILURE;
	}

	for (i = 0; i < NPUZZ; ++i) {
		if (fread(&res, sizeof(char), NCELLS, rfp) != NCELLS) {
			fprintf(stderr, "Failed to read result #%u\n", i);
			return EXIT_FAILURE;
		}
		if (fread(&sol, sizeof(char), NCELLS, sfp) != NCELLS) {
			fprintf(stderr, "Failed to read result #%u\n", i);
			return EXIT_FAILURE;
		}

		allcells = 1;
		for (j = 0; j < NCELLS; ++j) {
			if (res[j] != sol[j]) {
				allcells = 0;
				if (res[j] != '0')
					++errors;
			}
		}
		if (allcells)
			++solved;
	}

	pc = 1e2 * (double)solved / (double)NPUZZ;
	printf("%u/%u (%.2f%%) solved, %u errors\n", solved, NPUZZ, pc, errors);

	fclose(rfp);
	fclose(sfp);
	return EXIT_SUCCESS;
}