using System.Collections.Generic;
using System.Collections.ObjectModel;

namespace game.PlayerDataStorage
{
    public enum PlayerKVError
    {
        None, Validation, Unauthorized, Http, Network, Timeout, Cancelled, Protocol
    }

    public sealed class PlayerKVResult
    {
        public bool Success => Error == PlayerKVError.None;
        public PlayerKVError Error { get; }
        public int? StatusCode { get; }
        // Only a successful Get has Data. Failure must never look like an empty save.
        public IReadOnlyDictionary<string, string> Data { get; }
        // A failed write that entered the transport may already have reached the server.
        // This is conservative, including HTTP failures. Do not blindly replay the write.
        public bool MayHaveCommitted { get; }

        internal PlayerKVResult(PlayerKVError error, int? statusCode = null,
            Dictionary<string, string> data = null, bool mayHaveCommitted = false)
        {
            Error = error;
            StatusCode = statusCode;
            Data = data == null ? null : new ReadOnlyDictionary<string, string>(data);
            MayHaveCommitted = mayHaveCommitted;
        }
    }
}