using System;
using System.Collections;
using System.Net;
using System.Net.NetworkInformation;
using System.Text;

namespace NJCIT
{
    class LoginServer
    {
        private static readonly string[] domainStr = new string[] { "studentphone", "student" };
        private static readonly string initURL = "http://n.njcit.cn/index.php/index/init";
        private static readonly string logoutURL = "http://n.njcit.cn/index.php/index/logout";
        private static ArrayList result = null;
        public static bool Online = false;
        public static bool Logouted = false;

        // 静态初始化
        static LoginServer()
        {
            UpdateResult(HttpConect(initURL));
        }
        
        // 获取登录信息
        public static ArrayList GetInformation()
        {
            UpdateResult(HttpConect(initURL));
            return result;
        }

        // 执行登录
        public static void DoLogin(string username, int domain, string password)
        {
            string[] textArray = new string[] { "http://n.njcit.cn/index.php/index/login?username=", username, "&domain=" + domainStr[domain] + "&password=", password, "&enablemacauth=1" };
            UpdateResult(HttpConect(string.Concat(textArray)));
        }

        // 退出登录
        public static void DoLogout()
        {
            UpdateResult(HttpConect(logoutURL));
            Logouted = true;
        }

        // 处理登录返回结果
        private static void UpdateResult(string str)
        {
            if (str != null)
            {
                string[] strArray = str.Replace("{", "").Replace("}", "").Replace("\"", "").Split(new char[] { ',' });
                if (strArray != null)
                {
                    ArrayList list = new ArrayList();
                    if (strArray.Length == 3)
                    {
                        list.Add("认证失败, 请检查密码及账户状态！");
                        Online = false;
                    }
                    else if (strArray.Length == 1)
                    {
                        list.Add("认证失败，账户已锁定！");
                        Online = false;
                    }
                    else if (strArray.Length == 4)
                    {
                        list.Add("认证失败，并发登录超过最大限制！");
                        Online = false;
                    }
                    else
                    {
                        list.Add("用户已登录");
                        if (strArray.Length == 11)
                        {
                            list.Add(ParseData(strArray[2]));
                            list.Add(ParseData(strArray[3]));
                            list.Add(ParseData(strArray[4]));
                            list.Add(ParseData(strArray[6]));
                            list.Add(ParseData(strArray[8]));
                            list.Add(ParseData(strArray[9]));
                        }
                        else
                        {
                            list.Add(ParseData(strArray[2]));
                            list.Add(ParseData(strArray[3]));
                            list.Add(ParseData(strArray[4]));
                            list.Add(ParseData(strArray[6]));
                            list.Add(ParseData(strArray[9]));
                            list.Add(ParseData(strArray[10]));
                        }
                        Online = true;
                    }
                    result = list;
                }
            }
        }

        // Http连接
        private static string HttpConect(string URL)
        {
            Ping ping = new Ping();
            PingReply reply = ping.Send("n.njcit.cn", 1000);
            if (reply.Status != IPStatus.Success)
            {
                return null;
            }
            try
            {
                WebClient client = new WebClient
                {
                    Credentials = CredentialCache.DefaultCredentials
                };
                byte[] bytes = client.DownloadData(URL);
                return Encoding.UTF8.GetString(bytes);
            }
            catch (Exception)
            {
                return null;
            }
        }



        // 解析数据
        private static string ParseData(string str)
        {
            char[] separator = new char[] { ':' };
            return str.Split(separator)[1];
        }

    }
}