#pragma once

// MassBuilderSaveTool
// Copyright (C) 2021 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 <cstdio>

#include <Corrade/Containers/ArrayView.h>
#include <Corrade/Containers/GrowableArray.h>
#include <Corrade/Containers/StaticArray.h>
#include <Corrade/Utility/StlForwardString.h>

#include <Magnum/Types.h>

using namespace Corrade;
using namespace Magnum;

class BinaryWriter {
    public:
        explicit BinaryWriter(const std::string& filename);
        ~BinaryWriter();

        auto open() -> bool;

        void closeFile();

        auto position() -> Long;

        auto arrayPosition() const -> UnsignedLong;
        auto flushToFile() -> bool;

        auto writeByte(Byte value) -> bool;
        auto writeChar(char value) -> bool;
        auto writeUnsignedByte(UnsignedByte value) -> bool;
        auto writeShort(Short value) -> bool;
        auto writeUnsignedShort(UnsignedShort value) -> bool;
        auto writeInt(Int value) -> bool;
        auto writeUnsignedInt(UnsignedInt value) -> bool;
        auto writeLong(Long value) -> bool;
        auto writeUnsignedLong(UnsignedLong value) -> bool;
        auto writeFloat(Float value) -> bool;
        auto writeDouble(Double value) -> bool;
        auto writeArray(Containers::ArrayView<char> array) -> bool;

        template<std::size_t S>
        auto writeStaticArray(Containers::StaticArrayView<S, const char> array) -> bool {
            return std::fwrite(array.data(), sizeof(char), S, _file) == S;
        }

        auto writeUEString(const std::string& str) -> bool;

        template<typename T, typename U = std::conditional_t<std::is_trivially_copyable<T>::value, T, T&>>
        auto writeValueToArray(U value) -> UnsignedLong {
            Containers::ArrayView<U> view{&value, 1};
            return writeDataToArray(view);
        }

        auto writeUEStringToArray(const std::string& value) -> UnsignedLong;

        template<typename T>
        void writeValueToArrayAt(T& value, UnsignedLong position) {
            Containers::ArrayView<T> view{&value, 1};
            writeDataToArrayAt(view, position);
        }

        template<typename T>
        auto writeDataToArray(Containers::ArrayView<T> view) -> UnsignedLong {
            arrayAppend(_data, Containers::arrayCast<const char>(view));
            _index += sizeof(T) * view.size();
            return sizeof(T) * view.size();
        }

        template<typename T>
        void writeDataToArrayAt(Containers::ArrayView<T> view, UnsignedLong position) {
            auto casted_view = Containers::arrayCast<const char>(view);
            for(UnsignedLong i = 0; i < casted_view.size(); i++) {
                _data[position + i] = casted_view[i];
            }
        }

    private:
        FILE* _file = nullptr;

        Containers::Array<char> _data;
        UnsignedLong _index = 0;
};