// 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 <cstring>

#include <string>

#include "BinaryWriter.h"

BinaryWriter::BinaryWriter(const std::string& filename) {
    _file = std::fopen(filename.c_str(), "wb");
    if(!_file) {
        Utility::Error{} << "Couldn't open" << filename.c_str() << "for reading:\n"
                         << std::strerror(errno);
    }
}

BinaryWriter::~BinaryWriter() {
    closeFile();
}

auto BinaryWriter::open() -> bool {
    return _file;
}

void BinaryWriter::closeFile() {
    std::fflush(_file);
    std::fclose(_file);
    _file = nullptr;
}

auto BinaryWriter::position() -> Long {
    return _ftelli64(_file);
}

auto BinaryWriter::arrayPosition() const -> UnsignedLong {
    return _index;
}

auto BinaryWriter::flushToFile() -> bool {
    bool ret = writeArray(_data);
    std::fflush(_file);
    _data = Containers::Array<char>{};
    _index = 0;
    return ret;
}

auto BinaryWriter::writeChar(char value) -> bool {
    return std::fwrite(&value, sizeof(char), 1, _file) == 1;
}

auto BinaryWriter::writeByte(Byte value) -> bool {
    return std::fwrite(&value, sizeof(Byte), 1, _file) == 1;
}

auto BinaryWriter::writeUnsignedByte(UnsignedByte value) -> bool {
    return std::fwrite(&value, sizeof(UnsignedByte), 1, _file) == 1;
}

auto BinaryWriter::writeShort(Short value) -> bool {
    return std::fwrite(&value, sizeof(Short), 1, _file) == 1;
}

auto BinaryWriter::writeUnsignedShort(UnsignedShort value) -> bool {
    return std::fwrite(&value, sizeof(UnsignedShort), 1, _file) == 1;
}

auto BinaryWriter::writeInt(Int value) -> bool {
    return std::fwrite(&value, sizeof(Int), 1, _file) == 1;
}

auto BinaryWriter::writeUnsignedInt(UnsignedInt value) -> bool {
    return std::fwrite(&value, sizeof(UnsignedInt), 1, _file) == 1;
}

auto BinaryWriter::writeLong(Long value) -> bool {
    return std::fwrite(&value, sizeof(Long), 1, _file) == 1;
}

auto BinaryWriter::writeUnsignedLong(UnsignedLong value) -> bool {
    return std::fwrite(&value, sizeof(UnsignedLong), 1, _file) == 1;
}

auto BinaryWriter::writeFloat(Float value) -> bool {
    return std::fwrite(&value, sizeof(Float), 1, _file) == 1;
}

auto BinaryWriter::writeDouble(Double value) -> bool {
    return std::fwrite(&value, sizeof(Double), 1, _file) == 1;
}

auto BinaryWriter::writeArray(Containers::ArrayView<char> array) -> bool {
    if(array.size() == 0) {
        return false;
    }

    return std::fwrite(array.data(), sizeof(char), array.size(), _file) == array.size();
}

auto BinaryWriter::writeUEString(const std::string& str) -> bool {
    if(str.length() > UINT32_MAX) {
        Utility::Error{} << "BinaryWriter::writeUEString(): string is too big.";
        return false;
    }

    writeUnsignedInt(static_cast<UnsignedInt>(str.length()) + 1);

    if(str.length() > 0) {
        std::size_t count = std::fwrite(&str[0], sizeof(char), str.length(), _file);
        if(count != str.length()) {
            return false;
        }
    }
    return writeChar('\0');
}

auto BinaryWriter::writeUEStringToArray(const std::string& value) -> UnsignedLong {
    Containers::ArrayView<const char> view{value.c_str(), value.length()};
    return writeValueToArray<UnsignedInt>(UnsignedInt(value.length()) + 1u) + writeDataToArray(view) + writeValueToArray<char>('\0');
}