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

namespace CallCenterApi.Common
{
    /// <summary>
    /// 对cookie的操作(带壳版)
    /// </summary>
    /// <remarks>
    /// 带壳版的意思是之前ASP支持的那种二维cookie，cookie[][],
    /// 动用的是cookie.values,原版是cookie.value.
    /// 并且直接DES加密
    /// </remarks>
    public class CookieUtil
    {
        [DebuggerStepThrough]
        public static void SetCookie(string name, Dictionary<string, string> values)
        {
            SetCookie(name, values, null, null);
        }

        [DebuggerStepThrough]
        public static void SetCookie(string name, Dictionary<string, string> values, string domain)
        {
            SetCookie(name, values, domain, null);
        }
        [DebuggerStepThrough]
        public static void SetCookie(string name, Dictionary<string, string> values, DateTime expires)
        {
            SetCookie(name, values, null, expires);
        }
        [DebuggerStepThrough]
        public static void SetCookie(string name, Dictionary<string, string> values, string domain, DateTime? expires)
        {
            HttpCookie cookie = new HttpCookie(name);

            foreach (string k in values.Keys)
            {
                cookie.Values.Add(k, HttpUtility.UrlEncode(DESEncrypt.Encrypt(values[k]), Encoding.UTF8));
            }

            if (expires != null)
            {
                cookie.Expires = (DateTime)expires;
            }

            if (!string.IsNullOrEmpty(domain)) cookie.Domain = domain;
            cookie.HttpOnly = true;

            HttpContext context = HttpContext.Current;
            context.Response.Cookies.Add(cookie);
        }
        /// <summary>
        /// 获取cookie(已解密)
        /// </summary>
        /// <param name="name"></param>
        /// <param name="key"></param>
        /// <returns></returns>
        [DebuggerStepThrough]
        public static string GetCookie(string name, string key)
        {
            if (HttpContext.Current == null)
            {
                return null;
            }
            string valu = "";
            HttpContext context = HttpContext.Current;
            HttpCookie cookie = context.Request.Cookies[name];
            if (cookie != null)
            {
                valu = DESEncrypt.Decrypt(HttpUtility.UrlDecode(cookie.Values[key], Encoding.UTF8));
            }
            return valu;
        }
        [DebuggerStepThrough]
        public static void RemoveCookie(string name)
        {
            SetCookie(name, new Dictionary<string, string>(), "", DateTime.Now.AddDays(-1));
        }
        /// <summary>
        /// 将要删除的二维Cookie，写成Dictionary形式传入
        /// </summary>
        /// <param name="name"></param>
        /// <param name="values"></param>
        /// <remarks>没有基于SetCookie方法</remarks>
        public static void RemoveCookie(string name, List<string> values)
        {
            HttpContext context = HttpContext.Current;
            HttpCookie cookie = context.Request.Cookies[name];
            List<string> cookiekeys = Utils.StrArrayToList(cookie.Values.AllKeys);
            foreach (string k in values)
            {
                //if (cookiekeys.Contains(k))
                cookie.Values.Remove(k);
            }
            context.Response.Cookies.Add(cookie);
        }
        /// <summary>
        /// 清楚所有cookie
        /// </summary>
        public static void RemoveAllCookies()
        {
            HttpContext context = HttpContext.Current;
            foreach (string cookieKey in context.Request.Cookies.AllKeys)
            {
                context.Response.Cookies[cookieKey].Expires = DateTime.Now.AddDays(-1);
            }
        }
        /// <summary>
        /// 修改cookie,将要修改的二维Cookie，写成Dictionary形式传入
        /// </summary>
        /// <param name="name"></param>
        /// <param name="values"></param>
        /// <remarks>没有基于SetCookie方法</remarks>
        public static void UpdateCookie(string name, Dictionary<string, string> values)
        {
            HttpContext context = HttpContext.Current;
            HttpCookie cookie = context.Request.Cookies[name];
            List<string> cookiekeys = Utils.StrArrayToList(cookie.Values.AllKeys);
            foreach (string k in values.Keys)
            {
                //if (cookiekeys.Contains(k))
                cookie.Values[k] = HttpUtility.UrlEncode(DESEncrypt.Encrypt(values[k]), Encoding.UTF8);
            }
            context.Response.Cookies.Add(cookie);
        }
    }
}