#pragma once

// MassBuilderSaveTool
// Copyright (C) 2021-2022 Guillaume Jacquemin
//
// 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 this program.  If not, see <https://www.gnu.org/licenses/>.

#include <ctime>

#include <mutex>
#ifndef SAVETOOL_DEBUG_BUILD
#include <fstream>
#endif

#include <Corrade/Containers/String.h>
#include <Corrade/Containers/ArrayView.h>
#include <Corrade/Utility/Format.h>

#include <Magnum/Types.h>

#include "EntryType.h"

using namespace Corrade;

using Containers::ArrayView;
using Containers::String;
using Containers::StringView;

using namespace Magnum;

using namespace Containers::Literals;

class Logger {
    public:
        Logger(const Logger&) = delete;
        Logger& operator=(const Logger&) = delete;

        Logger(Logger&&) = delete;
        Logger& operator=(Logger&&) = delete;

        static auto instance() -> Logger&;

        void initialise();

        void indent();
        void unindent();

        void log(EntryType type, StringView location, StringView message);

        void lockMutex();
        void unlockMutex();

    private:
        Logger() = default;

        #ifndef SAVETOOL_DEBUG_BUILD
        std::ofstream _logFile;
        #endif

        UnsignedInt _indentLevel = 0;

        std::mutex _logMutex{};
};

auto logger() -> Logger&;

#define LOG(entry_type, message) logger().lockMutex(); \
                                 logger().log(EntryType::entry_type, \
                                              Utility::format("{}:{}", StringView{__builtin_FILE()}.find("src"_s).data() + 4, __builtin_LINE()), \
                                              message); \
                                 logger().unlockMutex()

#define LOG_INFO(message) LOG(Info, message)
#define LOG_WARNING(message) LOG(Warning, message)
#define LOG_ERROR(message) LOG(Error, message)

#define LOG_INFO_FORMAT(message, ...) LOG_INFO(Utility::format(message, __VA_ARGS__))
#define LOG_WARNING_FORMAT(message, ...) LOG_WARNING(Utility::format(message, __VA_ARGS__))
#define LOG_ERROR_FORMAT(message, ...) LOG_ERROR(Utility::format(message, __VA_ARGS__))