/*
  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 <stdint.h>
#include <stdlib.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)

typedef struct action_node_s {
  struct action_node_s *next;
  action_t action;
} action_node_t;

typedef struct action_list_s {
  struct action_node_s *head, *tail;
  uint32_t length;
} action_list_t;

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

extern int8_t move_deltas[4];

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

void action_list_init(const uint8_t board_size);
void action_list_free(action_list_t *list);
action_list_t *action_list_generate(tak_state_p state);

int action_move_to_front(const action_t action, action_list_t *list);

void action_take(tak_state_p state, const action_t action);
void action_undo(tak_state_p state, const action_t action);

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

#endif