using bsmd.database;
using log4net;
using System;
using System.Diagnostics;
using System.IO;
using System.ServiceProcess;
using System.Timers;

namespace bsmd.dakosy.ResponseService
{
    /// <summary>
    /// Windows service zum Abruf von NSW Response Dateien via SFTP und Import der Dateien in die DB    
    /// </summary>
    public partial class SFTPService : ServiceBase
    {
        private Timer _timer;
        private object _timerlock = new object();
        private bool processRunning = false;
        private ILog _log = LogManager.GetLogger(typeof(SFTPService));

        public SFTPService()
        {
            Directory.SetCurrentDirectory(AppDomain.CurrentDomain.BaseDirectory);
            InitializeComponent();
        }

        protected override void OnStart(string[] args)
        {
            this.EventLog.Source = this.ServiceName;
            this.EventLog.Log = "Application";            
            this.Init(args);
            this.EventLog.WriteEntry("NSW SFTP Response Service started.", EventLogEntryType.Information);
            System.Reflection.Assembly assembly = System.Reflection.Assembly.GetExecutingAssembly();
            FileVersionInfo fvi = FileVersionInfo.GetVersionInfo(assembly.Location);
            string version = fvi.FileVersion;
            _log.InfoFormat("Dakosy SFTP Response Service started. v.{0}", version);
            this._timer_Elapsed(null, null);
        }

        protected override void OnStop()
        {
            _log.Info("SFTPService stopped");
        }

        public void Init(string[] args)
        {
            this._timer = new Timer();
            this._timer.Interval = Properties.Settings.Default.SleepSeconds * 1000;
            this._timer.Elapsed += _timer_Elapsed;
            this._timer.Enabled = true;

            if (Debugger.IsAttached)
                this._timer_Elapsed(null, null);
        }

        void _timer_Elapsed(object sender, ElapsedEventArgs e)
        {
            lock (this._timerlock)
            {
                if (this.processRunning) return;
                else this.processRunning = true;
            }            

            if (DBManager.Instance.Connect(Properties.Settings.Default.ConnectionString))
            {
                try
                {
                    Response.ReadAll();
                }
                catch (Exception ex)
                {
                    _log.ErrorFormat("Exception occurred: {0}", ex.ToString());
                }
            }
            else
            {
                this.EventLog.WriteEntry("FormService DB connection failure", EventLogEntryType.Error);                
            }

            lock (this._timerlock)
            {
                this.processRunning = false;
            }
        }
    }
}