#nullable enable
using System;
using System.Threading;

namespace ShrinkNetwork
{
    public readonly struct ShrinkRequestToken : IEquatable<ShrinkRequestToken>
    {
        public static readonly ShrinkRequestToken Default = new(0);

        public ShrinkRequestToken(int value)
        {
            Value = value;
        }

        public int Value { get; }
        public bool IsDefault => Value == 0;

        public bool Equals(ShrinkRequestToken other) => Value == other.Value;
        public override bool Equals(object? obj) => obj is ShrinkRequestToken other && Equals(other);
        public override int GetHashCode() => Value;
        public override string ToString() => Value.ToString();

        public static bool operator ==(ShrinkRequestToken left, ShrinkRequestToken right) => left.Equals(right);
        public static bool operator !=(ShrinkRequestToken left, ShrinkRequestToken right) => !left.Equals(right);
        public static explicit operator int(ShrinkRequestToken token) => token.Value;
        public static explicit operator ShrinkRequestToken(int value) => new(value);
    }

    public sealed class ShrinkRpcCallOptions
    {
        public int TimeoutMs { get; set; } = 10000;
        public string? RouteOverride { get; set; }
        public ShrinkRequestToken? RequestTokenOverride { get; set; }
        public string? DebugLabel { get; set; }
        public CancellationToken CancellationToken { get; set; } = default;
    }

    public sealed class ShrinkRpcException : Exception
    {
        public int ErrorCode { get; }

        public ShrinkRpcException(int errorCode, string message)
            : base(message)
        {
            ErrorCode = errorCode;
        }
    }

    public static class ShrinkRpcErrorCode
    {
        public const int Unknown = 1;
        public const int Timeout = 2;
        public const int Canceled = 3;
        public const int HandlerException = 4;
        public const int InvalidResponse = 5;
        public const int PermissionDenied = 6;
        public const int ConnectionClosed = 7;
        public const int ProtocolMismatch = 8;
        public const int AuthenticationFailed = 9;
        public const int SessionTokenExpired = 10;
    }

    public abstract class ShrinkRpcResponseBase : IShrinkNetworkResponse
    {
        public int ErrorCode { get; set; }
        public string ErrorMessage { get; set; } = string.Empty;

        public bool IsSuccess => ErrorCode == 0;
    }
}