#include <algorithm>

#include <array>

#include <cstring>

#include "zserio/CppRuntimeException.h"

namespace zserio

{

CppRuntimeException::CppRuntimeException(const char* message) :

        m_buffer()

{

    append(message);

}

const char* CppRuntimeException::what() const noexcept

{

    return m_buffer.data();

}

void CppRuntimeException::append(const char* message)

{

    const size_t available = m_buffer.size() - 1 - m_len;

    const size_t numCharsToAppend = strnlen(message, available);

    appendImpl(std::string_view(message, numCharsToAppend));

}

void CppRuntimeException::append(const char* message, size_t messageLen)

{

    const size_t available = m_buffer.size() - 1 - m_len;

    const size_t numCharsToAppend = std::min(messageLen, available);

    appendImpl(std::string_view(message, numCharsToAppend));

}

void CppRuntimeException::appendImpl(std::string_view message)

{

    if (message.size() > 0)

    {

        (void)std::copy(message.begin(), message.end(), m_buffer.begin() + m_len);

        m_len += message.size();

    }

    m_buffer.at(m_len) = '\0';

}

CppRuntimeException& operator<<(CppRuntimeException& exception, const char* message)

{

    exception.append(message);

    return exception;

}

CppRuntimeException& operator<<(CppRuntimeException& exception, bool value)

{

    return exception << (value ? 
"true"1
 : 
"false"1
);

}

CppRuntimeException& operator<<(CppRuntimeException& exception, float value)

{

    std::array<char, 24> integerPartBuffer = {};

    std::array<char, 24> floatingPartBuffer = {};

    const char* integerPartString = nullptr;

    const char* floatingPartString = nullptr;

    convertFloatToString(integerPartBuffer, floatingPartBuffer, value, integerPartString, floatingPartString);

    CppRuntimeException& result = exception << integerPartString;

    if (floatingPartString != nullptr)

    {

        result = result << "." << floatingPartString;

    }

    return result;

}

CppRuntimeException& operator<<(CppRuntimeException& exception, double value)

{

    return exception << (static_cast<float>(value));

}

CppRuntimeException& operator<<(CppRuntimeException& exception, std::string_view value)

{

    exception.append(value.data(), value.size());

    return exception;

}

} // namespace zserio