using System;
using System.Web;
using System.Configuration;
using System.Web.Configuration;
using System.Timers;
using WebLib;

namespace 報到系統
{
    public class Global : System.Web.HttpApplication
    {
        private Timer _smsSendingTimer;
        private int _smsSendingIntervalMinutes = 1; // 預設每1分鐘執行一次

        protected void Application_Start(object sender, EventArgs e)
        {
            StringTable.Insert = false;
            StringTable.ByPass = true;

            #region 讀進 Web.Config 中的系統參數

            if (ConfigurationManager.AppSettings["ConnectionString"] != null)
                PublicVariable.ConnectionString = ConfigurationManager.ConnectionStrings[ConfigurationManager.AppSettings["ConnectionString"]].ConnectionString;
            else
                PublicVariable.ConnectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;

            DAC.ConnectionString = DAC.connTypeMSSQL;
            DAC.ConnectionString = PublicVariable.ConnectionString;

            if (ConfigurationManager.AppSettings["UserLanguage"] != null)
                PublicVariable.UserLanguage = ConfigurationManager.AppSettings["UserLanguage"];

            if (ConfigurationManager.AppSettings["CompanyName"] != null)
                PublicVariable.CompanyName = ConfigurationManager.AppSettings["CompanyName"];

            if (ConfigurationManager.AppSettings["CopyrightText"] != null)
                PublicVariable.CopyrightText = ConfigurationManager.AppSettings["CopyrightText"];

            if (ConfigurationManager.AppSettings["Theme"] != null)
                PublicVariable.Theme = ConfigurationManager.AppSettings["Theme"].ToLower();

            if (ConfigurationManager.AppSettings["SystemName"] != null)
                PublicVariable.SystemName = ConfigurationManager.AppSettings["SystemName"].ToLower();

            if (ConfigurationManager.AppSettings["NoLoginFunction"] != null)
                PublicVariable.NoLoginFunction = Convert.ToBoolean(ConfigurationManager.AppSettings["NoLoginFunction"].ToLower());

            #region 發郵件設定
            if (ConfigurationManager.AppSettings["SendMailBySSL"] != null)
                PublicVariable.SendMailBySSL = Convert.ToBoolean(ConfigurationManager.AppSettings["SendMailBySSL"].ToLower());

            if (ConfigurationManager.AppSettings["SendMailHost"] != null)
                PublicVariable.SendMailHost = ConfigurationManager.AppSettings["SendMailHost"];

            if (ConfigurationManager.AppSettings["SendMailPort"] != null)
                PublicVariable.SendMailPort = Convert.ToInt32(ConfigurationManager.AppSettings["SendMailPort"]);

            if (ConfigurationManager.AppSettings["SendMailUserName"] != null)
                PublicVariable.SendMailUserName = ConfigurationManager.AppSettings["SendMailUserName"];

            if (ConfigurationManager.AppSettings["SendMailPassword"] != null)
                PublicVariable.SendMailPassword = ConfigurationManager.AppSettings["SendMailPassword"];
            #endregion

            #endregion

            #region 設定相關服務的參數

            MailService.Host = PublicVariable.SendMailHost;
            MailService.Port = PublicVariable.SendMailPort;
            MailService.UserName = PublicVariable.SendMailUserName;
            MailService.Password = PublicVariable.SendMailPassword;
            MailService.UseSSL = PublicVariable.SendMailBySSL;
            MailService.LogPath = Server.MapPath("~/Log");
            MailService.Enabled = true;

            DeleteFileService.DeletePatterns.Add(Server.MapPath("~/Upload") + "/*.mdb");
            DeleteFileService.Enabled = true;

            #endregion

            #region 設定 DEBUG 模式
            CompilationSection section = ConfigurationManager.GetSection("system.web/compilation") as CompilationSection;
            PublicVariable.DEBUG = section.Debug;
            #endregion

            #region 從資料庫讀取系統設定
            try
            {
                using (var conn = DAC.NewConnection())
                {
                    // 讀取目前使用的簡訊平台代碼
                    var dacBwex = new DAC_BWEX(conn);
                    string currentPlatform = dacBwex.GetKeyValue("CurrentMMSPlatform");
                    if (!string.IsNullOrEmpty(currentPlatform))
                        PublicVariable.CurrentMMSPlatform = currentPlatform;
                }
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine("[Global] 讀取系統設定失敗：" + ex.Message);
            }
            #endregion

            #region 啟動簡訊發送服務
            InitializeSMSSendingService();
            #endregion
        }

        protected void Session_Start(object sender, EventArgs e)
        {

        }

        protected void Application_BeginRequest(object sender, EventArgs e)
        {
            HttpRuntimeSection section = (HttpRuntimeSection)ConfigurationManager.GetSection("system.web/httpRuntime");
            int maxFileSize = section.MaxRequestLength * 1024;
            if (Request.ContentLength > maxFileSize)
            {
                Server.ClearError();
                Response.Redirect("~/Forms/Common/FileTooLarge.aspx");
            }
        }

        protected void Application_AuthenticateRequest(object sender, EventArgs e)
        {

        }

        private string Message1 = @"錯誤網頁：{0}
錯誤類別：{1}
錯誤來源：{2}
錯誤訊息：{3}
堆疊內容：
{4}

";

        private string Message2 = @"以上的錯誤發生的原因是：
錯誤類別：{0}
錯誤來源：{1}
錯誤訊息：{2}
堆疊內容：
{3}

";
        protected void Application_Error(object sender, EventArgs e)
        {
            // 發生未處理錯誤時執行的程式碼
            string Message = "";
            Exception ex = Server.GetLastError();

            if (ex == null)
            {
                Server.ClearError();
                return;
            }

            // 如果是 404，重導到 404 頁面
            if (ex is HttpException && (ex as HttpException).GetHttpCode() == 404)
            {
                Server.ClearError();
                Response.Redirect("~/Forms/404.aspx");
                return;
            }

            Message += String.Format(Message1,
              Request.Path,
              ex.GetType().FullName,
              ex.Source,
              ex.Message,
              ex.StackTrace);

            ex = ex.InnerException;
            while (ex != null)
            {
                Message += String.Format(Message2,
                  ex.GetType().FullName,
                  ex.Source,
                  ex.Message,
                  ex.StackTrace);
                ex = ex.InnerException;
            }

            // 建立Log目錄
            if (!System.IO.Directory.Exists(Server.MapPath("~/Log")))
            {
                System.IO.Directory.CreateDirectory(Server.MapPath("~/Log"));
            }

            // 寫入文字檔
            string fileName = DateTime.UtcNow.AddHours(8).ToString("yyyyMMdd_HHmmss");
            System.IO.File.AppendAllText(Server.MapPath(string.Format(@"~/Log/{0}.txt", fileName)), Message);

            // 清除Error
            Server.ClearError();

            Response.Redirect(String.Format("~/Forms/500.aspx?errcode={0}", fileName));
        }

        protected void Session_End(object sender, EventArgs e)
        {

        }

        protected void Application_End(object sender, EventArgs e)
        {
            // 停止簡訊發送 Timer
            if (_smsSendingTimer != null)
            {
                _smsSendingTimer.Stop();
                _smsSendingTimer.Dispose();
                _smsSendingTimer = null;
            }
        }

        /// <summary>
        /// 初始化簡訊發送服務
        /// </summary>
        private void InitializeSMSSendingService()
        {
            try
            {
                // 從 Web.Config 讀取發送間隔設定（預設為 1 分鐘）
                if (ConfigurationManager.AppSettings["SMSSendingIntervalMinutes"] != null)
                {
                    if (int.TryParse(ConfigurationManager.AppSettings["SMSSendingIntervalMinutes"], out int interval))
                    {
                        _smsSendingIntervalMinutes = interval;
                    }
                }

                // 建立 Timer
                if (_smsSendingTimer == null)
                    _smsSendingTimer = new Timer();
                _smsSendingTimer.Interval = _smsSendingIntervalMinutes * 60 * 1000; // 轉換為毫秒
                _smsSendingTimer.Elapsed += SMSSendingTimer_Elapsed;
                _smsSendingTimer.AutoReset = true;
                _smsSendingTimer.Enabled = true;

                System.Diagnostics.Debug.WriteLine(
                    string.Format("[SMSSendingService] 已啟動，發送間隔：{0} 分鐘", _smsSendingIntervalMinutes));
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine(
                    string.Format("[SMSSendingService] 初始化失敗：{0}", ex.Message));
            }
        }

        /// <summary>
        /// Timer Elapsed 事件處理器
        /// </summary>
        private void SMSSendingTimer_Elapsed(object sender, ElapsedEventArgs e)
        {
            try
            {
                // 呼叫簡訊發送服務
                SMSSendingService.Instance.Start();
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine(
                    string.Format("[SMSSendingService] 執行失敗：{0}", ex.Message));
            }
        }
    }
}