// Copyright 2019 Google LLC

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

// http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

#include "cc/game_utils.h"

#include <iostream>

#include <cstring>

#include <utility>

#include <vector>

#include "absl/strings/str_cat.h"

#include "absl/strings/str_format.h"

#include "cc/file/path.h"

#include "cc/file/utils.h"

#include "cc/logging.h"

#include "cc/platform/utils.h"

#include "cc/sgf.h"

namespace minigo {

std::string FormatWinStatsTable(

const std::vector<std::pair<std::string, WinStats>>& stats) {

size_t name_length = 4;

for (const auto& name_stats : stats) {

name_length = std::max(name_length, name_stats.first.size());

}

std::string result;

auto append_header = [&](absl::string_view str) {

absl::StrAppendFormat(&result, "%*s %s", name_length, "", str);

};

auto append_stats = [&](absl::string_view name, const WinStats& stats) {

const auto& b = stats.black_wins;

const auto& w = stats.white_wins;

absl::StrAppendFormat(

&result, "\n%-*s %7d %7d %7d %7d %7d %7d", name_length, name,

b.total(), b.both_passed, b.opponent_resigned,

w.total(), w.both_passed, w.opponent_resigned);

};

append_header(

" Black Black Black White White White\n");

append_header(

" total passes resign total passes resign");

for (const auto& name_stats : stats) {

append_stats(name_stats.first, name_stats.second);

}

return result;

}

std::string GetOutputName(size_t game_id) {

return absl::StrCat(GetHostname(), "-", GetProcessId(), "-", game_id);

}

void WriteSgf(const std::string& output_dir, const std::string& output_name,

const Game& game, bool write_comments) {

MG_CHECK(file::RecursivelyCreateDir(output_dir));

bool log_names = game.black_name() != game.white_name();

std::vector<sgf::MoveWithComment> moves;

moves.reserve(game.moves().size());

for (size_t i = 0; i < game.moves().size(); ++i) {

const auto* move = game.moves()[i].get();

std::string comment;

if (write_comments) {

if (i == 0) {

comment =

absl::StrCat("Resign Threshold: ", game.options().resign_threshold,

"\n", move->comment);

} else {

if (log_names) {

comment =

absl::StrCat(move->color == Color::kBlack ? game.black_name()

: game.white_name(),

"\n", move->comment);

} else {

comment = move->comment;

}

}

}

moves.emplace_back(move->color, move->c, std::move(comment));

}

sgf::CreateSgfOptions options;

options.komi = game.options().komi;

options.result = game.result_string();

options.black_name = game.black_name();

options.white_name = game.white_name();

options.game_comment = game.comment();

auto sgf_str = sgf::CreateSgfString(moves, options);

auto output_path = file::JoinPath(output_dir, output_name + ".sgf");

MG_CHECK(file::WriteFile(output_path, sgf_str));

}

void LogEndGameInfo(const Game& game, absl::Duration game_time) {

std::cout << game.result_string() << std::endl;

std::cout << "Playing game: " << absl::ToDoubleSeconds(game_time)

<< std::endl;

std::cout << "Played moves: " << game.moves().size() << std::endl;

if (game.moves().empty()) {

return;

}

int bleakest_move = 0;

float q = 0.0;

if (game.FindBleakestMove(&bleakest_move, &q)) {

std::cout << "Bleakest eval: move=" << bleakest_move << " Q=" << q

<< std::endl;

}

// If resignation is disabled, check to see if the first time Q_perspective

// crossed the resign_threshold the eventual winner of the game would have

// resigned. Note that we only check for the first resignation: if the

// winner would have incorrectly resigned AFTER the loser would have

// resigned on an earlier move, this is not counted as a bad resignation for

// the winner (since the game would have ended after the loser's initial

// resignation).

if (!game.options().resign_enabled) {

for (size_t i = 0; i < game.moves().size(); ++i) {

const auto* move = game.moves()[i].get();

float Q_perspective = move->color == Color::kBlack ? move->Q : -move->Q;

if (Q_perspective < game.options().resign_threshold) {

if ((move->Q < 0) != (game.result() < 0)) {

std::cout << "Bad resign: move=" << i << " Q=" << move->Q

<< std::endl;

}

break;

}

}

}

}

} // namespace minigo