/*
	This file is part of ct.

	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 ct. If not, see <https://www.gnu.org/licenses/>.
*/

#ifndef ACTIONS_H
#define ACTIONS_H

#include <stdlib.h>
#include <stdint.h>

#include <tak.h>

// ===================================================================
// Types
// ===================================================================

enum A_TYPE { A_PLACE, A_MOVE };

typedef uint32_t action_t;

#define A_DATA1_SHIFT 24
#define A_DATA0_SHIFT 16
#define A_LOC_SHIFT   8

#define A_GET_DATA1(a)  (enum A_TYPE)((a)>>A_DATA1_SHIFT)
#define A_GET_DATA0(a)   (int8_t)(((a)>>A_DATA0_SHIFT) & 0xFF)
#define A_GET_LOC(a) (uint8_t)(((a)>>A_LOC_SHIFT) & 0xFF)
#define A_GET_TYPE(a) (uint8_t)((a) & 0xFF)
#define A_BUILD(type,loc,data0,data1) ((type)												\
																			 | (loc) << A_LOC_SHIFT				\
																			 | (data0) << A_DATA0_SHIFT		\
																			 | (data1) << A_DATA1_SHIFT)

// lazy queue
#define ACTION_AR_LEN 256
typedef struct action_lq_s {
	action_t actions[ACTION_AR_LEN*2];
	int length, i_f, i_b;
} action_lq_t;

// ===================================================================
// Variables
// ===================================================================

extern int8_t move_deltas[4];

// ===================================================================
// Methods
// ===================================================================

void action_lq_init(void);
void action_lq_free(action_lq_t *lq);
action_lq_t *action_lq_generate(void);
action_lq_t *action_lq_copy_with_mtf(action_lq_t *lq, action_t front);

int action_move_to_front(const action_t action, action_lq_t *lq);

void action_take(const action_t action);
void action_undo(const action_t action);

void action_to_ptn(const action_t action, char* out_ptn);

#endif