using APCViewer.Singleton;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using System;
using System.Diagnostics;
using System.IO;
using System.Net;
using System.Threading;
using System.Threading.Tasks;

namespace APCViewer.HostedService
{

    public class TimedHostedService : IHostedService, IDisposable
    {

        private readonly int _ExecutionCount;
        private readonly WebClient _WebClient;
        private readonly Background _Background;
        private readonly IConfiguration _Configuration;
        private readonly ILogger<TimedHostedService> _Log;

        private Timer _APCDataTimer;
        private Timer _EDADataTimer;
        private Timer _EAFLogDataTimer;

        public TimedHostedService(Background background, IConfiguration configuration, IServiceProvider serviceProvider)
        {
            _ExecutionCount = 0;
            _Background = background;
            _Configuration = configuration;
            _WebClient = serviceProvider.GetRequiredService<WebClient>();
            _Log = serviceProvider.GetRequiredService<ILogger<TimedHostedService>>();
            //_HttpContextAccessor = serviceProvider.GetRequiredService<IHttpContextAccessor>();
            _WebClient = serviceProvider.GetRequiredService<WebClient>();
        }

        public Task StartAsync(CancellationToken stoppingToken)
        {
            _Log.LogInformation(string.Concat("Timed Hosted Service: ", nameof(Background), ":", _Background.IsEnvironment.Profile, ":", Environment.ProcessId, " running."));
            _Background.Update(_Log, _WebClient);
            if (_Background.IsEnvironment.Development)
            {
                int milliSeconds = 3000;
                if (milliSeconds == 0)
                { }
            }
            else if (_Background.IsEnvironment.Staging)
            {
                int milliSeconds = 3000;
                _APCDataTimer = new Timer(APCDataCallback, null, milliSeconds, Timeout.Infinite);
                _Background.Timers.Add(_APCDataTimer);
                milliSeconds += 2000;
                _EAFLogDataTimer = new Timer(EAFLogDataCallback, null, milliSeconds, Timeout.Infinite);
                _Background.Timers.Add(_EAFLogDataTimer);
                milliSeconds += 2000;
                _EDADataTimer = new Timer(EDADataCallback, null, milliSeconds, Timeout.Infinite);
                _Background.Timers.Add(_EDADataTimer);
                milliSeconds += 2000;
            }
            else if (_Background.IsEnvironment.Production)
            {
                int milliSeconds = 3000;
                _APCDataTimer = new Timer(APCDataCallback, null, milliSeconds, Timeout.Infinite);
                _Background.Timers.Add(_APCDataTimer);
                milliSeconds += 2000;
                _EAFLogDataTimer = new Timer(EAFLogDataCallback, null, milliSeconds, Timeout.Infinite);
                _Background.Timers.Add(_EAFLogDataTimer);
                milliSeconds += 2000;
                _EDADataTimer = new Timer(EDADataCallback, null, milliSeconds, Timeout.Infinite);
                _Background.Timers.Add(_EDADataTimer);
                milliSeconds += 2000;
            }
            else
                throw new Exception();
            if (_Background.IsEnvironment.Staging || _Background.IsEnvironment.Production)
            {
                string countDirectory = _Background.GetCountDirectory("Start");
                string checkDirectory = Path.GetPathRoot(countDirectory);
                if (Directory.Exists(checkDirectory))
                    Directory.CreateDirectory(countDirectory);
            }
            return Task.CompletedTask;
        }

        public Task StopAsync(CancellationToken stoppingToken)
        {
            _Log.LogInformation(string.Concat("Timed Hosted Service: ", nameof(Background), ":", _Background.IsEnvironment.Profile, ":", Environment.ProcessId, " is stopping."));
            _Background.Stop(immediate: true);
            for (short i = 0; i < short.MaxValue; i++)
            {
                Thread.Sleep(500);
                if (_ExecutionCount == 0)
                    break;
            }
            return Task.CompletedTask;
        }

        public void Dispose()
        {
            _Background.Dispose();
        }

        private void APCDataCallback(object state)
        {
            try
            {
                if (_Background.IsPrimaryInstance())
                    _Background.APCDataCallback();
            }
            catch (Exception e) { _Background.Catch(e); }
            try
            {
                TimeSpan timeSpan;
                if (!_Background.IsPrimaryInstance())
                    timeSpan = new TimeSpan(DateTime.Now.AddSeconds(15).Ticks - DateTime.Now.Ticks);
                else
                    timeSpan = new TimeSpan(DateTime.Now.AddMinutes(1).Ticks - DateTime.Now.Ticks);
                _APCDataTimer.Change((int)timeSpan.TotalMilliseconds, Timeout.Infinite);
            }
            catch (Exception e) { _Background.Catch(e); }
        }

        private void EDADataCallback(object state)
        {
            try
            {
                if (_Background.IsPrimaryInstance())
                    _Background.EDADataCallback();
            }
            catch (Exception e) { _Background.Catch(e); }
            try
            {
                TimeSpan timeSpan;
                if (!_Background.IsPrimaryInstance())
                    timeSpan = new TimeSpan(DateTime.Now.AddSeconds(15).Ticks - DateTime.Now.Ticks);
                else
                    timeSpan = new TimeSpan(DateTime.Now.AddMinutes(1).Ticks - DateTime.Now.Ticks);
                _EDADataTimer.Change((int)timeSpan.TotalMilliseconds, Timeout.Infinite);
            }
            catch (Exception e) { _Background.Catch(e); }
        }

        private void EAFLogDataCallback(object state)
        {
            try
            {
                if (_Background.IsPrimaryInstance())
                    _Background.EAFLogDataCallback();
            }
            catch (Exception e) { _Background.Catch(e); }
            try
            {
                TimeSpan timeSpan;
                if (!_Background.IsPrimaryInstance())
                    timeSpan = new TimeSpan(DateTime.Now.AddSeconds(15).Ticks - DateTime.Now.Ticks);
                else
                    timeSpan = new TimeSpan(DateTime.Now.AddMinutes(1).Ticks - DateTime.Now.Ticks);
                _EAFLogDataTimer.Change((int)timeSpan.TotalMilliseconds, Timeout.Infinite);
            }
            catch (Exception e) { _Background.Catch(e); }
        }

    }

}