using System;
using System.Collections.Generic;
using System.Net;

namespace CsharpHttpHelper.Helper
{
	/// <summary>
	/// Cookie操作帮助类 Copyright：http://www.httphelper.com/
	/// </summary>
	internal static class HttpCookieHelper
	{
		/// <summary>
		/// 根据字符生成Cookie和精简串，将排除path,expires,domain以及重复项
		/// </summary>
		/// <param name="strcookie">Cookie字符串</param>
		/// <returns>精简串</returns>
		internal static string GetSmallCookie(string strcookie)
		{
			if (string.IsNullOrWhiteSpace(strcookie))
			{
				return string.Empty;
			}
			List<string> list = new List<string>();
			string[] array = strcookie.ToString().Split(new string[2]
			{
				",",
				";"
			}, StringSplitOptions.RemoveEmptyEntries);
			string[] array2 = array;
			foreach (string text in array2)
			{
				string text2 = text.ToLower().Trim().Replace("\r\n", string.Empty)
					.Replace("\n", string.Empty);
				if (!string.IsNullOrWhiteSpace(text2) && text2.Contains("=") && !text2.Contains("path=") && !text2.Contains("expires=") && !text2.Contains("domain=") && !list.Contains(text))
				{
					list.Add($"{text};");
				}
			}
			return string.Join(";", list);
		}

		/// <summary>
		/// 将字符串Cookie转为CookieCollection
		/// </summary>
		/// <param name="strcookie">Cookie字符串</param>
		/// <returns>List-CookieItem</returns>
		internal static CookieCollection StrCookieToCookieCollection(string strcookie)
		{
			if (string.IsNullOrWhiteSpace(strcookie))
			{
				return null;
			}
			CookieCollection cookieCollection = new CookieCollection();
			strcookie = GetSmallCookie(strcookie);
			string[] array = strcookie.ToString().Split(new string[1]
			{
				";"
			}, StringSplitOptions.RemoveEmptyEntries);
			string[] array2 = array;
			foreach (string text in array2)
			{
				string[] array3 = text.ToString().Split(new string[1]
				{
					"="
				}, StringSplitOptions.RemoveEmptyEntries);
				if (array3.Length == 2)
				{
					cookieCollection.Add(new Cookie
					{
						Name = array3[0].Trim(),
						Value = array3[1].Trim()
					});
				}
			}
			return cookieCollection;
		}

		/// <summary>
		/// 将CookieCollection转为字符串Cookie
		/// </summary>
		/// <param name="cookie">Cookie字符串</param>
		/// <returns>strcookie</returns>
		internal static string CookieCollectionToStrCookie(CookieCollection cookie)
		{
			if (cookie == null)
			{
				return string.Empty;
			}
			string text = string.Empty;
			foreach (Cookie item in cookie)
			{
				text += $"{item.Name}={item.Value};";
			}
			return text;
		}

		/// <summary>
		/// 自动合并两个Cookie的值返回更新后结果 
		/// </summary>
		/// <param name="cookie1">Cookie1</param>
		/// <param name="cookie2">Cookie2</param>
		/// <returns>返回更新后的Cookie</returns>
		internal static string GetMergeCookie(string cookie1, string cookie2)
		{
			if (string.IsNullOrWhiteSpace(cookie1))
			{
				return cookie2;
			}
			if (string.IsNullOrWhiteSpace(cookie2))
			{
				return cookie1;
			}
			List<string> list = new List<string>();
			string[] array = cookie1.ToString().Split(';');
			string[] array2 = cookie2.ToString().Split(';');
			string[] array3 = array;
			foreach (string text in array3)
			{
				if (!list.Contains(text))
				{
					list.Add($"{text} ");
				}
			}
			array3 = array2;
			foreach (string text in array3)
			{
				if (!list.Contains(text))
				{
					list.Add($"{text}");
				}
			}
			return string.Join(";", list);
		}
	}
}