using MAX.Core.Helpers;
using System;
using System.Collections.Generic;
using System.Linq;

namespace MAX.Core.Extensions;

/// <summary>
/// 系统扩展 - 类型转换
/// </summary>
public static partial class Extensions
{
	/// <summary>
	/// IsNullOrEmpty
	/// </summary>
	/// <param name="input"></param>
	/// <returns></returns>
	public static bool IsNullOrEmpty(this string input)
	{
		return string.IsNullOrEmpty(input);
	}
	/// <summary>
	/// 安全转换为字符串，去除两端空格，当值为null时返回""
	/// </summary>
	/// <param name="input">输入值</param>
	public static string SafeString(this object input)
	{
		return input?.ToString().Trim() ?? string.Empty;
	}

	/// <summary>
	/// 转换为bool
	/// </summary>
	/// <param name="obj">数据</param>
	public static bool ToBool(this string obj, bool defvalue = false)
	{
		return Helpers.Convert.ToBool(obj, defvalue);
	}

	/// <summary>
	/// 转换为可空bool
	/// </summary>
	/// <param name="obj">数据</param>
	public static bool? ToBoolOrNull(this string obj)
	{
		return Helpers.Convert.ToBoolOrNull(obj);
	}

	/// <summary>
	/// 转换为int
	/// </summary>
	/// <param name="obj">数据</param>
	public static int ToInt(this string obj, int defvalue = 0)
	{
		return Helpers.Convert.ToInt(obj, defvalue);
	}

	/// <summary>
	/// 转换为可空int
	/// </summary>
	/// <param name="obj">数据</param>
	public static int? ToIntOrNull(this string obj)
	{
		return Helpers.Convert.ToIntOrNull(obj);
	}

	/// <summary>
	/// 转换为long
	/// </summary>
	/// <param name="obj">数据</param>
	public static long ToLong(this string obj, long defvalue = 0)
	{
		return Helpers.Convert.ToLong(obj, defvalue);
	}

	/// <summary>
	/// 转换为可空long
	/// </summary>
	/// <param name="obj">数据</param>
	public static long? ToLongOrNull(this string obj)
	{
		return Helpers.Convert.ToLongOrNull(obj);
	}

	/// <summary>
	/// 转换为double
	/// </summary>
	/// <param name="obj">数据</param>
	public static double ToDouble(this string obj, double defvalue = 0)
	{
		return Helpers.Convert.ToDouble(obj, defvalue: defvalue);
	}

	/// <summary>
	/// 转换为可空double
	/// </summary>
	/// <param name="obj">数据</param>
	public static double? ToDoubleOrNull(this string obj)
	{
		return Helpers.Convert.ToDoubleOrNull(obj);
	}

	/// <summary>
	/// 转换为decimal
	/// </summary>
	/// <param name="obj">数据</param>
	public static decimal ToDecimal(this string obj, decimal defvalue = 0)
	{
		return Helpers.Convert.ToDecimal(obj, defvalue: defvalue);
	}

	/// <summary>
	/// 转换为可空decimal
	/// </summary>
	/// <param name="obj">数据</param>
	public static decimal? ToDecimalOrNull(this string obj)
	{
		return Helpers.Convert.ToDecimalOrNull(obj);
	}

	/// <summary>
	/// 转换为日期
	/// </summary>
	/// <param name="obj">数据</param>
	public static DateTime ToDate(this string obj)
	{
		return Helpers.Convert.ToDate(obj);
	}

	/// <summary>
	/// 转换为可空日期
	/// </summary>
	/// <param name="obj">数据</param>
	public static DateTime? ToDateOrNull(this string obj)
	{
		return Helpers.Convert.ToDateOrNull(obj);
	}

	/// <summary>
	/// 转换为Guid
	/// </summary>
	/// <param name="obj">数据</param>
	public static Guid ToGuid(this string obj)
	{
		return Helpers.Convert.ToGuid(obj);
	}

	/// <summary>
	/// 转换为可空Guid
	/// </summary>
	/// <param name="obj">数据</param>
	public static Guid? ToGuidOrNull(this string obj)
	{
		return Helpers.Convert.ToGuidOrNull(obj);
	}

	/// <summary>
	/// 转换为Guid集合
	/// </summary>
	/// <param name="obj">数据,范例: "83B0233C-A24F-49FD-8083-1337209EBC9A,EAB523C6-2FE7-47BE-89D5-C6D440C3033A"</param>
	public static List<Guid> ToGuidList(this string obj)
	{
		return Helpers.Convert.ToGuidList(obj);
	}

	/// <summary>
	/// 转换为Guid集合
	/// </summary>
	/// <param name="obj">字符串集合</param>
	public static List<Guid> ToGuidList(this IList<string> obj)
	{
		if (obj == null)
		{
			return [];
		}

		return obj.Select(t => t.ToGuid()).ToList();
	}
	/// <summary>
	/// 转换枚举描述
	/// </summary>
	/// <param name="obj"></param>
	/// <returns></returns>
	public static string ToDescription(this Enum obj)
	{
		return EnumHelper.GetDescription(obj.GetType(), obj);
	}

	/// <summary>
	/// 枚举值 → 单个 EnumItem
	/// </summary>
	/// <typeparam name="TEnum"></typeparam>
	/// <param name="value"></param>
	/// <returns></returns>
	public static EnumItem<TEnum> ToItem<TEnum>(this TEnum value) where TEnum : struct, Enum
	{
		return new EnumItem<TEnum>(value);
	}
	/// <summary>
	/// 是否单一标记
	/// </summary>
	/// <param name="obj"></param>
	/// <returns></returns>
	public static bool IsSingleFlag(Enum obj)
	{
		return EnumHelper.IsSingleFlag(obj);
	}
	/// <summary>
	/// 获取第一个标记
	/// </summary>
	/// <typeparam name="T"></typeparam>
	/// <param name="obj"></param>
	/// <returns></returns>
	public static Enum GetFirstFlag(this Enum obj)
	{
		return EnumHelper.GetFirstFlag(obj);
	}
}