using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace GeoSigmaDrawLib
{
    /// <summary>
    /// 操作结果类
    /// 没有专门的工具模块，暂时先放这里
    /// </summary>
    public class OperationResult
    {
        private OperationResult(bool success, string error)
        {
            IsSuccess = success;
            ErrorMessage = error;
        }

        /// <summary>
        /// 是否成功
        /// </summary>
        public bool IsSuccess { get; }

        /// <summary>
        /// 错误消息，如果失败，这里会放上原因
        /// </summary>
        public string ErrorMessage { get; }

        /// <summary>
        /// 成功
        /// </summary>
        /// <returns>表示成功的操作结果对象</returns>
        public static OperationResult Success()
        {
            return new OperationResult(true, string.Empty);
        }

        /// <summary>
        /// 失败
        /// </summary>
        /// <param name="message">失败消息</param>
        /// <returns>带失败消息的操作结果对象</returns>
        public static OperationResult Fail(string message)
        {
            if (string.IsNullOrEmpty(message))
            {
                throw new ArgumentException("失败时必须提供错误消息", nameof(message));
            }

            return new OperationResult(false, message);
        }
    }
}