#include <boost/ut.hpp>
#include <parselink/proto/session_id.h>
#include <set>

#include <fmt/format.h>

namespace {

using namespace boost::ut;
using namespace parselink::proto;

template <typename... Bytes>
constexpr std::array<std::byte, sizeof...(Bytes)> make_bytes(Bytes&&... bytes) {
    return {std::byte(std::forward<Bytes>(bytes))...};
}

constexpr std::array<std::byte, 32> null_id_bytes = {};
constexpr std::size_t expected_null_hash = 0xd98558;

} // namespace

suite session_id_tests = [] {
    "test explicitly generated session ids"_test = [] {
        constexpr session_id sid1(null_id_bytes);
        constexpr session_id sid2(null_id_bytes);
        expect(sid1 == sid2);
        expect(sid1 == null_id_bytes);
        constexpr auto basic_id = make_bytes(0x0, 0x01, 0x02, 0x03, 0x04, 0x05,
                0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
                0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19,
                0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f);
        constexpr session_id sid3(basic_id);
        constexpr session_id sid4(basic_id);
        expect(sid3 == sid4);
        expect(sid3 == basic_id);
    };

    "test hashing"_test = [] {
        session_id sid(null_id_bytes);
        expect(std::hash<decltype(sid)>{}(sid) == expected_null_hash);
    };

    "test random generated"_test = [] {
        session_id sid1;
        session_id sid2;
        expect(sid1 != null_id_bytes);
        expect(sid2 != null_id_bytes);
        expect(sid1 != sid2);
    };

    "test random generated entropy"_test = [] {
        constexpr static std::size_t iter_count = 100000;
        std::set<session_id> sessions;
        while (sessions.size() < iter_count) {
            session_id s;
            expect(!sessions.contains(s));
            sessions.insert(std::move(s));
        }
    };
};