namespace NATS.Server.Raft;

public sealed class RaftLog
{
    private readonly List<RaftLogEntry> _entries = [];

    public IReadOnlyList<RaftLogEntry> Entries => _entries;

    public RaftLogEntry Append(int term, string command)
    {
        var entry = new RaftLogEntry(_entries.Count + 1, term, command);
        _entries.Add(entry);
        return entry;
    }

    public void AppendReplicated(RaftLogEntry entry)
    {
        if (_entries.Any(e => e.Index == entry.Index))
            return;

        _entries.Add(entry);
    }
}

public sealed record RaftLogEntry(long Index, int Term, string Command);