namespace ChatApi.Infra
{
    public class Result
    {
        protected Result(bool success, string error)
        {
            if (success && error != string.Empty)
                throw new InvalidOperationException();
            if (!success && error == string.Empty)
                throw new InvalidOperationException();
            Success = success;
            Error = error;
        }

        public bool Success { get; }
        public string Error { get; }
        public bool IsFailure => !Success;

        public static Result Fail(string message)
        {
            return new Result(false, message);
        }

        public static Result<T> Fail<T>(string message)
        {
            return new Result<T>(default, false, message);
        }

        public static Result Ok()
        {
            return new Result(true, string.Empty);
        }

        public static Result<T> Ok<T>(T value)
        {
            return new Result<T>(value, true, string.Empty);
        }
    }

    public class Result<T> : Result
    {
        protected internal Result(T value, bool success, string error)
            : base(success, error)
        {
            Value = value;
        }

        protected internal Result(T value)
            : base(true, "")
        {
            Value = value;
        }

        public T Value { get; set; }
    }
}