// GNU Lesser General Public License v3.0
// Copyright (c) 2025 Bart Beumer <bart@4beumer.nl>
//
// This program is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License v3.0 as published by
// the Free Software Foundation.
//
#include <bmrshared/magic_file_info.hpp>

namespace bmrshared
{
magic_file_info::magic_file_info(const std::filesystem::path& path)
    : m_magic_cookie(nullptr)
{
    bool load_ok = false;
    m_magic_cookie = magic_open(MAGIC_MIME_TYPE);

    if (m_magic_cookie != nullptr && std::filesystem::is_regular_file(path))
    {
        load_ok = (magic_load(m_magic_cookie, path.native().c_str()) == 0);
    }

    if (m_magic_cookie && !load_ok)
    {
        magic_close(m_magic_cookie);
        m_magic_cookie = nullptr;
    }

    if (!load_ok)
    {
        throw std::runtime_error("Could not initialize libmagic.");
    }
}

magic_file_info::~magic_file_info()
{
    magic_close(m_magic_cookie);
}

std::string magic_file_info::get_mime(const std::filesystem::path& path) const
{
    std::string mime;
    if (std::filesystem::is_regular_file(path))
    {
        const char* file_name = path.native().c_str();
        const char* magic_full = nullptr;
        if (file_name != nullptr)
        {
            magic_full = magic_file(m_magic_cookie, file_name);
        }
        if (magic_full != nullptr)
        {
            mime = magic_full;
        }
    }
    return mime;
}

} // namespace bmrshared