/*
 * Helper to test board_rect function.
 * Copyright © 2022 Nick Bowler
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#include <config.h>
#include "game.h"
#include "tap.h"

#define mask_char(x) ((x) ? '@' : '.')

static void print_mask(const char *prefix, unsigned long mask)
{
	int i;

	for (i = 0; i < 5; i++) {
		tap_diag("%s%c%c%c%c%c", prefix, mask_char(mask & 1),
		                                 mask_char(mask & 2),
		                                 mask_char(mask & 4),
		                                 mask_char(mask & 8),
		                                 mask_char(mask & 16));
		mask >>= 5;
	}
}

static void do_check(int x1, int y1, int x2, int y2)
{
	unsigned long expect = board_right(x1)
	                     & board_below(y1)
	                     & board_left(x2)
	                     & board_above(y2);

	unsigned long actual = board_rect(x1, y1, x2, y2);

	if (!tap_result(actual == expect, "board_rect(%d, %d, %d, %d)",
	                                  x1, y1, x2, y2))
	{
		tap_diag("Failed, unexpected result");
		tap_diag("Received 0x%.7lx:", actual);
		print_mask("   ", actual);
		tap_diag("Expected 0x%.7lx:", expect);
		print_mask("   ", expect);
	}
}

int main(void)
{
	int x1, y1, x2, y2;

	tap_plan(225);

	/* Exhaustive search of all valid inputs */
	for (x1 = 0; x1 < 5; x1++) {
		for (y1 = 0; y1 < 5; y1++) {
			for (x2 = x1; x2 < 5; x2++) {
				for (y2 = y1; y2 < 5; y2++) {
					do_check(x1, y1, x2, y2);
				}
			}
		}
	}
	tap_done();
}