#include <sodium.h>
#include <fstream>
#include <string>
#include <array>

static std::string base64(const unsigned char *data, size_t length) {
    std::array<char, 128> output{};
    sodium_bin2base64(output.data(), output.size(), data, length, sodium_base64_VARIANT_ORIGINAL_NO_PADDING);
    return output.data();
}

int main(int argc, char **argv) {
    if (argc != 2 || sodium_init() < 0) return 1;
    std::ofstream output(argv[1]);
    output << "{\"hashes\":[";
    const std::array<std::string, 3> passwords{"voicecat test", "caf\xc3\xa9", std::string("a\0b", 3)};
    std::array<unsigned char, 16> salt{};
    for (size_t i = 0; i < salt.size(); ++i) salt[i] = static_cast<unsigned char>(i);
    for (size_t i = 0; i < passwords.size(); ++i) {
        std::array<unsigned char, 32> hash{};
        if (crypto_pwhash(hash.data(), hash.size(), passwords[i].data(), passwords[i].size(), salt.data(), 2,
                         64 * 1024 * 1024, crypto_pwhash_ALG_ARGON2ID13) != 0) return 1;
        if (i) output << ',';
        output << "{\"passwordBase64\":\"" << base64(reinterpret_cast<const unsigned char *>(passwords[i].data()), passwords[i].size())
               << "\",\"hash\":\"$argon2id$v=19$m=65536,t=2,p=1$" << base64(salt.data(), salt.size()) << '$' << base64(hash.data(), hash.size()) << "\"}";
    }
    output << "]}\n";
    return output ? 0 : 1;
}