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/*
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  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
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  Copyright (c) 2013 Ronald de Man
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  Copyright (C) 2016-2018 Marco Costalba, Lucas Braesch
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  Stockfish is free software: you can redistribute it and/or modify
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  it under the terms of the GNU General Public License as published by
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  the Free Software Foundation, either version 3 of the License, or
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  (at your option) any later version.
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  Stockfish is distributed in the hope that it will be useful,
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  but WITHOUT ANY WARRANTY; without even the implied warranty of
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  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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  GNU General Public License for more details.
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  You should have received a copy of the GNU General Public License
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  along with this program.  If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef TBPROBE_H
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#ifndef TBPROBE_H
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#define TBPROBE_H
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#define TBPROBE_H
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#include <ostream>
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#include "../search.h"
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#include "../search.h"
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namespace Tablebases {
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namespace Tablebases {
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enum WDLScore {
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    WDLLoss        = -2, // Loss
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    WDLBlessedLoss = -1, // Loss, but draw under 50-move rule
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    WDLDraw        =  0, // Draw
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    WDLCursedWin   =  1, // Win, but draw under 50-move rule
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    WDLWin         =  2, // Win
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    WDLScoreNone  = -1000
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};
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// Possible states after a probing operation
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enum ProbeState {
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    FAIL              =  0, // Probe failed (missing file table)
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    OK                =  1, // Probe succesful
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    CHANGE_STM        = -1, // DTZ should check the other side
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    ZEROING_BEST_MOVE =  2  // Best move zeroes DTZ (capture or pawn move)
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};
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extern int MaxCardinality;
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extern int MaxCardinality;
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void init(const std::string& path);
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void init(const std::string& paths);
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int probe_wdl(Position& pos, int *success);
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WDLScore probe_wdl(Position& pos, ProbeState* result);
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int probe_dtz(Position& pos, int *success);
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int probe_dtz(Position& pos, ProbeState* result);
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bool root_probe(Position& pos, Search::RootMoves& rootMoves, Value& score);
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bool root_probe(Position& pos, Search::RootMoves& rootMoves, Value& score);
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bool root_probe_wdl(Position& pos, Search::RootMoves& rootMoves, Value& score);
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bool root_probe_wdl(Position& pos, Search::RootMoves& rootMoves, Value& score);
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void filter_root_moves(Position& pos, Search::RootMoves& rootMoves);
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void filter_root_moves(Position& pos, Search::RootMoves& rootMoves);
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inline std::ostream& operator<<(std::ostream& os, const WDLScore v) {
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    os << (v == WDLLoss        ? "Loss" :
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           v == WDLBlessedLoss ? "Blessed loss" :
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           v == WDLDraw        ? "Draw" :
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           v == WDLCursedWin   ? "Cursed win" :
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           v == WDLWin         ? "Win" : "None");
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    return os;
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}
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inline std::ostream& operator<<(std::ostream& os, const ProbeState v) {
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    os << (v == FAIL              ? "Failed" :
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           v == OK                ? "Success" :
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           v == CHANGE_STM        ? "Probed opponent side" :
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           v == ZEROING_BEST_MOVE ? "Best move zeroes DTZ" : "None");
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    return os;
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}
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}
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}
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#endif
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#endif