using System;
using System.Diagnostics;
using System.ServiceProcess;

namespace ChadSoft.Edificator.Service
{
    public partial class EdificationService : ServiceBase
    {
        private Runner _runner;

        public EdificationService()
        {
            InitializeComponent();
        }

        protected override void OnStart(string[] args)
        {
            _runner = new Runner();
            _runner.Exception += HandleException;
            _runner.Start();

            EventLog.WriteEntry("Edification Service started.", EventLogEntryType.Information);
        }

        protected override void OnStop()
        {
            DisposeRunner();

            EventLog.WriteEntry("Edification Service stopped.", EventLogEntryType.Information);
        }

        protected override void OnShutdown()
        {
            DisposeRunner();

            EventLog.WriteEntry("Edification Service shut down.", EventLogEntryType.Information);

            base.OnShutdown();
        }

        private void HandleException(object sender, RunnerExceptionEventArgs e)
        {
            Exception exception = e.Exception;
            string message = string.Format("Exception in Edification Service!  Message: {0}\nStack Trace: {1}",
                                           exception.Message, exception.StackTrace);
            EventLog.WriteEntry(message, EventLogEntryType.Error);
        }

        private void DisposeRunner()
        {
            if (_runner == null)
                return;

            _runner.Stop();
            _runner.Dispose();
            _runner = null;
        }
    }
}