/* SPDX-License-Identifier: GPL-2.0-only */
#pragma once

#include <stddef.h>
#include "config.h"
#include "types.h"

// Types for using a bit more ram to avoid duplicated computations
typedef struct {
	column_t *vertical2;
	column_t *horizontal2;
	column_t *diagonalUp2;
	column_t *diagonalDown2;
	column_t *vertical4;
	column_t *horizontal4;
	column_t *diagonalUp4;
	column_t *diagonalDown4;
} directions_t;

typedef struct {
	column_t *win0;
	column_t *win1;
	directions_t same;
} wins_t;

extern winint_t countcmp(
	const board_t a,
	const board_t b
);

// Get a random column in the board
extern columnsint_t randomColumn(
	const board_t board
);

// Put a piece in the board
extern void playMove(
	board_t *boardptr,
	const columnsint_t column
);

// Calculate wins
extern void calcWins(
	// Null pointer on systems where the extra ram is not available
	wins_t  *wins,
	board_t *boardptr,
	const columnsint_t column
);

// Reference implementation for calculating wins,
// slow AF especially on big boards
extern void calcWins_slow(
	board_t *boardptr
);