using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;

namespace DotNet.Utilities
{
    /// <summary>
    /// Cookie操作帮助类
    /// </summary>
    public static class HttpCookieHelper
    {
        /// <summary>
        /// 根据字符生成Cookie列表
        /// </summary>
        /// <param name="cookie">Cookie字符串</param>
        /// <returns></returns>
        public static List<CookieItem> GetCookieList(string cookie)
        {
            List<CookieItem> cookielist = new List<CookieItem>();
            foreach (string item in cookie.Split(new string[] { ";", "," }, StringSplitOptions.RemoveEmptyEntries))
            {
                if (Regex.IsMatch(item, @"([\s\S]*?)=([\s\S]*?)$"))
                {
                    Match m = Regex.Match(item, @"([\s\S]*?)=([\s\S]*?)$");
                    cookielist.Add(new CookieItem() { Key = m.Groups[1].Value, Value = m.Groups[2].Value });
                }
            }
            return cookielist;
        }

        /// <summary>
        /// 根据Key值得到Cookie值,Key不区分大小写
        /// </summary>
        /// <param name="Key">key</param>
        /// <param name="cookie">字符串Cookie</param>
        /// <returns></returns>
        public static string GetCookieValue(string Key, string cookie)
        {
            foreach (CookieItem item in GetCookieList(cookie))
            {
                if (item.Key == Key)
                    return item.Value;
            }
            return "";
        }
        /// <summary>
        /// 格式化Cookie为标准格式
        /// </summary>
        /// <param name="key">Key值</param>
        /// <param name="value">Value值</param>
        /// <returns></returns>
        public static string CookieFormat(string key, string value)
        {
            return string.Format("{0}={1};", key, value);
        }
    }

    /// <summary>
    /// Cookie对象
    /// </summary>
    public class CookieItem
    {
        /// <summary>
        /// 键
        /// </summary>
        public string Key { get; set; }
        /// <summary>
        /// 值
        /// </summary>
        public string Value { get; set; }
    }
}