#include <doctest/doctest.h>

#include <vector>

#include "wireframe/l7/ssh.hpp"

using namespace wireframe::net;

namespace {

std::vector<unsigned char> to_bytes(const std::string& s) {
    return std::vector<unsigned char>(s.begin(), s.end());
}

}  // namespace

TEST_CASE("parse_ssh_banner decodes a CRLF-terminated banner with a comment") {
    auto banner = parse_ssh_banner(to_bytes("SSH-2.0-OpenSSH_9.6 FreeBSD-20240101\r\n"));
    REQUIRE(banner.has_value());
    CHECK(banner->proto_version == "2.0");
    CHECK(banner->software_version == "OpenSSH_9.6");
}

TEST_CASE("parse_ssh_banner decodes a banner with no comment") {
    auto banner = parse_ssh_banner(to_bytes("SSH-2.0-libssh_0.10.6\r\n"));
    REQUIRE(banner.has_value());
    CHECK(banner->proto_version == "2.0");
    CHECK(banner->software_version == "libssh_0.10.6");
}

TEST_CASE("parse_ssh_banner tolerates a bare LF terminator") {
    auto banner = parse_ssh_banner(to_bytes("SSH-1.99-OpenSSH_3.9\n"));
    REQUIRE(banner.has_value());
    CHECK(banner->proto_version == "1.99");
    CHECK(banner->software_version == "OpenSSH_3.9");
}

TEST_CASE("parse_ssh_banner rejects payloads without the SSH- prefix") {
    CHECK_FALSE(parse_ssh_banner(to_bytes("not an ssh banner\r\n")).has_value());
}

TEST_CASE("parse_ssh_banner rejects a banner missing the version separator") {
    CHECK_FALSE(parse_ssh_banner(to_bytes("SSH-nodash\r\n")).has_value());
}

TEST_CASE("parse_ssh_banner rejects an unterminated line") {
    CHECK_FALSE(parse_ssh_banner(to_bytes("SSH-2.0-OpenSSH_9.6")).has_value());
}

TEST_CASE("SshDissector claims port 22 and its summary matches parse_ssh_banner") {
    SshDissector dissector;
    CHECK(dissector.port() == kSshPort);

    auto summary = dissector.summarize(to_bytes("SSH-2.0-OpenSSH_9.6\r\n"));
    REQUIRE(summary.has_value());
    CHECK(*summary == "SSH 2.0 OpenSSH_9.6");
}

TEST_CASE("SshDissector::summarize returns nullopt for non-SSH payload") {
    SshDissector dissector;
    CHECK_FALSE(dissector.summarize(to_bytes("GET / HTTP/1.1\r\n")).has_value());
}