/*
  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/>.
*/

#include <math.h>
#include <stdint.h>

#include <actions.h>
#include <nn.h>
#include <tak.h>
#include <tt_llcht.h>
#include <zobrist.h>

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

extern const float infty;
extern char negamax_ptn[9];
extern uint8_t negamax_search_depth;

extern void negamax_display_progress(const uint8_t cur_depth,
                                     const uint8_t init_depth,
                                     const uint32_t length);

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

void negamax_init(const uint8_t new_board_size);

void negamax_free(void);

/*
 * Do α-β negamax with transposition tables and naïve move ordering to
 * depth `negamax_search_depth' and store the PTN of best move in
 * `negamax_ptn', and return its value. The `negamax_display_progress'
 * function is called on every new square at the top level.
 */
float negamax_generate(tak_state_p state);