#include <luna/SHA.h>
#include <os/ArgumentParser.h>
#include <os/File.h>

Result<int> luna_main(int argc, char** argv)
{
    Vector<StringView> files;

    os::ArgumentParser parser;
    parser.add_description("Calculate SHA256 hashes for a series of files."_sv);
    parser.add_system_program_info("sha256sum"_sv);
    parser.set_vector_argument(files, "files"_sv, "-"_sv);
    parser.parse(argc, argv);

    for (auto path : files)
    {
        auto file = TRY(os::File::open_input_file(path));
        auto data = TRY(file->read_all());

        SHA256 sha;

        TRY(sha.append(data.data(), data.size()));
        auto digest = TRY(sha.digest());
        auto string = TRY(digest.to_string());

        os::println("%s %s", string.chars(), path.chars());
    }

    return 0;
}