// ***********************************************************************
// Company          : 
// Author           : Kimch
// Created          : 
//
// Last Modified By : Kimch
// Last Modified On : 2016-03-30
// ***********************************************************************
namespace G
{
	using System.Collections;
	using UnityEngine;

	/// <summary>
	/// 转换方法集
	/// </summary>
	public static class KUtils
	{
		#region CONST

		#endregion

		#region ENUM

		#endregion

		#region MODEL

		#endregion

		#region FIELD

		#endregion

		#region PROPERTY

		#endregion

		#region METHOD

		#endregion

		#region STATIC

		private static string _PersistentDataPath;

		public static string PersistentDataPath
		{
			get
			{
				if (_PersistentDataPath.IsNullOrEmpty())
				{
					_PersistentDataPath = Application.persistentDataPath;
					if (_PersistentDataPath.IsNullOrEmpty())
					{
						//_PersistentDataPath = KPlatform.InternalGetPersistentDataPath();
					}
				}
				return _PersistentDataPath;
			}
		}

		/// <summary>
		/// add component if not have one
		/// </summary>
		/// <typeparam name="T">Component</typeparam>
		/// <param name="go">target</param>
		/// <param name="checkChild">是否从子物体中获取T</param>
		public static T AddComponentIfNotHave<T>(GameObject go, bool checkChild = false) where T : UnityEngine.Component
		{
			T t = default(T);
			if (checkChild)
			{
				t = go.GetComponentInChildren<T>();
			}
			else
			{
				t = go.GetComponent<T>();
			}
			if (t == null)
			{
				t = (T)go.AddComponent(typeof(T));
			}
			return t;
		}
		/// <summary>
		/// add an element to array by index
		/// </summary>
		/// <param name="index">默认加到数组尾部</param>
		public static void AddElementAt<T>(ref T[] arr, T t, int index = -1) where T : new()
		{
			if (arr == null)
			{
				arr = new T[] { };
			}
			T[] temp = new T[arr.Length + 1];
			if (index == -1)
			{
				index = arr.Length;
			}
			if (index > temp.Length)
			{
				//KLog.LogWarning("insert index out of range");
				return;
			}
			if (t == null)
			{
				t = new T();
			}
			if (temp.Length > 1)
			{
				for (int i = 0; i < temp.Length; i++)
				{
					if (i < index)
					{
						temp[i] = arr[i];
					}
					else if (i == index)
					{
						temp[index] = t;
					}
					else
					{
						temp[i] = arr[i - 1];
					}
				}
			}
			arr = temp;
		}

		/// <summary>
		/// 检查特定DateTime和当前是不是差距特定天数
		/// </summary>
		/// <param name="checkDate"></param>
		/// <param name="day"></param>
		/// <param name="afterNow">如果是true，则认为checkDate在当前之后</param>
		/// <returns></returns>
		public static bool CheckDate(System.DateTime checkDate, int day, bool afterNow = false)
		{
			System.DateTime now = System.DateTime.Now;
			double days;
			if (afterNow)
			{
				days = (checkDate - now).TotalDays;
			}
			else
			{
				days = (now - checkDate).TotalDays;
			}
			if (days >= day)
			{
				return true;
			}
			return false;
		}
		/// <summary>
		/// 检查特定DateTime和当前是不是差距特定秒数
		/// </summary>
		/// <param name="checkMinute"></param>
		/// <param name="second"></param>
		/// <param name="afterNow">如果是true，则认为checkDate在当前之后</param>
		/// <returns></returns>
		public static bool CheckSecond(System.DateTime checkMinute, int second, bool afterNow = false)
		{
			System.DateTime now = System.DateTime.Now;
			double seconds;
			if (afterNow)
			{
				seconds = (checkMinute - now).TotalSeconds;
			}
			else
			{
				seconds = (now - checkMinute).TotalSeconds;
			}
			if (seconds >= second)
			{
				return true;
			}
			return false;
		}

		/// <summary>
		/// 为空或者是""
		/// </summary>
		/// <param name="str"></param>
		/// <returns></returns>
		public static bool IsNullOrEmpty(this string str)
		{
			return string.IsNullOrEmpty(str);
		}
		/// <summary>
		/// 为空或者全是占位符
		/// </summary>
		/// <param name="str"></param>
		/// <returns></returns>
		public static bool IsNullOrWhiteSpace(this string str)
		{
			return string.IsNullOrEmpty(str) || str.Trim().Length == 0;
		}
		/// <summary>
		/// string转boolean
		/// </summary>
		/// <param name="value"></param>
		/// <returns></returns>
		public static bool ToBoolean(this string value)
		{
			bool result;
			bool.TryParse(value, out result);
			return result;
		}
		/// <summary>
		/// string转float
		/// </summary>
		/// <param name="value"></param>
		/// <returns></returns>
		public static float ToFloat(this string value)
		{
			float result;
			float.TryParse(value, out result);
			return result;
		}
		/// <summary>
		/// string转int
		/// </summary>
		/// <param name="value"></param>
		/// <returns></returns>
		public static int ToInt(this string value)
		{
			int result;
			int.TryParse(value, out result);
			return result;
		}

		/// <summary>Generates the unique identifier.</summary>
		/// <returns></returns>
		public static string GenerateGUID()
		{
			return System.Guid.NewGuid().ToString();
		}

		/// <summary>Generates the hash.</summary>
		/// <param name="value">The value.</param>
		/// <returns></returns>
		public static uint GenerateHash(string value)
		{
			uint b = 378551;
			uint a = 63689;
			uint hash = 0;
			foreach (var str in value)
			{
				hash = hash * a + str;
				a *= b;
			}
			return hash;
		}


		#endregion
	}
}