using APCViewer.Models.Methods;
using APCViewer.Models.Stateless;
using APCViewer.Models.Stateless.Methods;
using APCViewer.Singleton;
using IFX.Shared;
using Serilog.Context;
using System.Diagnostics;

namespace APCViewer.HostedService;

public class TimedHostedService : IHostedService
{

    private readonly int _ExecutionCount;
    private readonly List<Timer> _Timers;
    private readonly Timer _APCDataTimer;
    private readonly Timer _EDADataTimer;
    private readonly Serilog.ILogger _Log;
    private readonly Background _Background;
    private readonly Timer _EAFLogDataTimer;
    private readonly IsEnvironment _IsEnvironment;
    private readonly IBackground _BackgroundMethods;

    public TimedHostedService(IsEnvironment isEnvironment, Background background)
    {
        _ExecutionCount = 0;
        _Background = background;
        _IsEnvironment = isEnvironment;
        _BackgroundMethods = background;
        _Log = Serilog.Log.ForContext<TimedHostedService>();
        _APCDataTimer = new Timer(APCDataCallback, null, Timeout.Infinite, Timeout.Infinite);
        _EDADataTimer = new Timer(EDADataCallback, null, Timeout.Infinite, Timeout.Infinite);
        _EAFLogDataTimer = new Timer(EAFLogDataCallback, null, Timeout.Infinite, Timeout.Infinite);
        _Timers = new()
        {
            _APCDataTimer,
            _EDADataTimer,
            _EAFLogDataTimer
        };
    }

    public Task StartAsync(CancellationToken stoppingToken)
    {
        string? methodName = IMethodName.GetActualAsyncMethodName();
        using (LogContext.PushProperty("MethodName", methodName))
        {
            _Log.Info(string.Concat("Timed Hosted Service: ", _IsEnvironment.Profile, ":", Environment.ProcessId, " running."));
            int milliSeconds = 3000;
            if (_IsEnvironment.Development)
            {
                if (milliSeconds == 0)
                { }
            }
            else if (_IsEnvironment.Staging)
            {
                _ = _APCDataTimer.Change(milliSeconds, Timeout.Infinite);
                milliSeconds += 2000;
                _ = _EAFLogDataTimer.Change(milliSeconds, Timeout.Infinite);
                milliSeconds += 2000;
                _ = _EDADataTimer.Change(milliSeconds, Timeout.Infinite);
                milliSeconds += 2000;
            }
            else if (_IsEnvironment.Production)
            {
                _ = _APCDataTimer.Change(milliSeconds, Timeout.Infinite);
                milliSeconds += 2000;
                _ = _EAFLogDataTimer.Change(milliSeconds, Timeout.Infinite);
                milliSeconds += 2000;
                _ = _EDADataTimer.Change(milliSeconds, Timeout.Infinite);
                milliSeconds += 2000;
            }
            else
                throw new Exception();
        }
        return Task.CompletedTask;
    }

    public Task StopAsync(CancellationToken stoppingToken)
    {
        string? methodName = IMethodName.GetActualAsyncMethodName();
        using (LogContext.PushProperty("MethodName", methodName))
        {
            _Log.Info(string.Concat("Timed Hosted Service: ", _IsEnvironment.Profile, ":", Environment.ProcessId, " is stopping."));
            foreach (Timer timer in _Timers)
                _ = timer.Change(Timeout.Infinite, 0);
            _BackgroundMethods.Stop(immediate: true);
            for (short i = 0; i < short.MaxValue; i++)
            {
                Thread.Sleep(500);
                if (_ExecutionCount == 0)
                    break;
            }
        }
        return Task.CompletedTask;
    }

    private void APCDataCallback(object? state)
    {
        try
        {
            string? methodName = IMethodName.GetActualAsyncMethodName();
            using (LogContext.PushProperty("MethodName", methodName))
            {
                if (_BackgroundMethods.IsPrimaryInstance())
                    _Background.APCDataCallback();
            }
        }
        catch (Exception e) { _Log.Error(e, "Error: "); }
        try
        {
            TimeSpan timeSpan;
            if (!_BackgroundMethods.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) { _Log.Error(e, "Error: "); }
    }

    private void EDADataCallback(object? state)
    {
        try
        {
            string? methodName = IMethodName.GetActualAsyncMethodName();
            using (LogContext.PushProperty("MethodName", methodName))
            {
                if (_BackgroundMethods.IsPrimaryInstance())
                    _Background.EDADataCallback();
            }
        }
        catch (Exception e) { _Log.Error(e, "Error: "); }
        try
        {
            TimeSpan timeSpan;
            if (!_BackgroundMethods.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) { _Log.Error(e, "Error: "); }
    }

    private void EAFLogDataCallback(object? state)
    {
        try
        {
            string? methodName = IMethodName.GetActualAsyncMethodName();
            using (LogContext.PushProperty("MethodName", methodName))
            {
                if (_BackgroundMethods.IsPrimaryInstance())
                    _Background.EAFLogDataCallback();
            }
        }
        catch (Exception e) { _Log.Error(e, "Error: "); }
        try
        {
            TimeSpan timeSpan;
            if (!_BackgroundMethods.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) { _Log.Error(e, "Error: "); }
    }

}