using System;
using System.Collections.Generic;
using System.Globalization;
using System.Windows.Controls;
using System.Windows.Data;

namespace ECMonitor.MVVM
{
	public class VerifyRule : ValidationRule
	{
		public VerifyRuleType Type { get; set; } = VerifyRuleType.Unknown;

		public List<object> WhatList { get; set; }

		public override ValidationResult Validate(object value, CultureInfo cultureInfo)
		{
			string strVal = value != null ? (string)value : string.Empty;
			ValidationResult vRet = Type switch
			{
				VerifyRuleType.NotEmpty => VerifyNotEmpty(strVal),
				VerifyRuleType.IP => VerifyIP(strVal),
				VerifyRuleType.Unknown => VerifyUnkown(strVal),
				VerifyRuleType.Temp => VerifyTemp(strVal),
				_ => VerifyUnkown(strVal),
			};

			WhatList = new();
			WhatList.Add(new { Type, vRet.IsValid, value, strVal, vRet });
			return vRet;
		}

		#region Verify Region

		private static ValidationResult VerifyNotEmpty(string value)
		{
			bool ret = !string.IsNullOrWhiteSpace(value);
			string errMsg = "不能为空！";
			return ret ? ValidationResult.ValidResult : new ValidationResult(false, errMsg);
		}

		private static ValidationResult VerifyIP(string value)
		{
			bool ret = VerifyUnit.CheckIp(value);
			string errMsg = "IP格式错误！";
			return ret ? ValidationResult.ValidResult : new ValidationResult(false, errMsg);
		}

		private static ValidationResult VerifyTemp(string value)
		{
			bool ret = !string.IsNullOrWhiteSpace(value);
			string errMsg = "临时错误！";
			return ret ? ValidationResult.ValidResult : new ValidationResult(false, errMsg);
		}

		private static ValidationResult VerifyUnkown(string value)
		{
			bool ret = false;
			string errMsg = "未知错误！";
			return ret ? ValidationResult.ValidResult : new ValidationResult(false, errMsg);
		}

		#endregion Verify Region
	}
}