using AppServerWatchDogService.Enums;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Timers;

namespace AppServerWatchDogService
{
    public static class RestartTCPClient
    {
        static Timer timer;
        static Int32 HH = ConfigHelper.SetHour;
        static Int32 MM = ConfigHelper.SetMinute;
        static String RestartType = ConfigHelper.SetRestartType;

        public static void Main()
        {
            setup_Timer(HH, MM, RestartType);
        }

        public static void setup_Timer(Int32 HH, Int32 MM, String restartType)
        {
            AppServerWatchDogService.WriteEventLog(Program.COMPANY, "### Timer Started ###", EventLogEntryType.Information, (Int32)EventId.EVENT_WATCHDOG);

            DateTime nowTime = DateTime.Now;
            DateTime scheduledTime = new DateTime(nowTime.Year, nowTime.Month, nowTime.Day, HH, MM, 0, 0); //Specify your time HH,MM,SS
            if (nowTime > scheduledTime)
                scheduledTime = scheduledTime.AddDays(1);

            if(restartType.Equals("periodic"))
                scheduledTime = DateTime.Now.AddHours(HH).AddMinutes(MM);

            AppServerWatchDogService.WriteEventLog(Program.COMPANY, String.Format("TCP Service will restart @ {0}", 
                scheduledTime.ToString()), EventLogEntryType.Information, (Int32)EventId.EVENT_WATCHDOG);

            double tickTime = (double)(scheduledTime - DateTime.Now).TotalMilliseconds;
            timer = new Timer(tickTime);
            timer.Elapsed += new ElapsedEventHandler(timer_Elapsed);
            timer.Start();
        }

        static void timer_Elapsed(object sender, ElapsedEventArgs e)
        {
            AppServerWatchDogService.WriteEventLog(Program.COMPANY, "### Timer Stopping ###", EventLogEntryType.Warning, (Int32)EventId.EVENT_WATCHDOG);

            timer.Stop();
            
            AppServerWatchDogService.WriteEventLog(Program.COMPANY, $"### Restarting TCP Service: {ConfigHelper.TCPServiceName}###", EventLogEntryType.Information, (Int32)EventId.EVENT_WATCHDOG);
            try
            {
                if (ServiceControlUtils.IsServiceRunning(ConfigHelper.TCPServiceName))
                {
                    ServiceControlUtils.stopService(ConfigHelper.TCPServiceName);
                    ServiceControlUtils.startService(ConfigHelper.TCPServiceName);
                }
                else
                {
                    ServiceControlUtils.startService(ConfigHelper.TCPServiceName);
                }
                AppServerWatchDogService.WriteEventLog(Program.COMPANY, $"### Restarted TCP Service: {ConfigHelper.TCPServiceName} ###", EventLogEntryType.Information, (Int32)EventId.EVENT_WATCHDOG);
            }
            catch(Exception ex)
            {
                AppServerWatchDogService.WriteEventLog(Program.COMPANY, $"Failed to restart TCP Service: {ConfigHelper.TCPServiceName} because: " + Environment.NewLine +
                    ex.ToString(), EventLogEntryType.Error, (int)EventId.EVENT_WATCHDOG);
            }
                        
            setup_Timer(HH, MM, RestartType);
        }
    }
}