using System.Data;

using Gatus.To.MonA.Models;

using Microsoft.Extensions.Hosting.WindowsServices;

namespace Gatus.To.MonA;

public partial class Worker : BackgroundService {

    private bool? _First;
    private readonly bool _IsWindowsService;
    private readonly ILogger<Worker> _Logger;
    private readonly AppSettings _AppSettings;
    private readonly IHttpClientFactory _HttpClientFactory;

    public Worker(IHttpClientFactory httpClientFactory, ILogger<Worker> logger, IServiceProvider serviceProvider, AppSettings appSettings, List<string> collection) {
        _Logger = logger;
        _AppSettings = appSettings;
        _HttpClientFactory = httpClientFactory;
        logger.LogInformation(string.Join(Environment.NewLine, collection));
        try { logger.LogInformation("<{folder}>", Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData)); } catch (Exception) { }
        _First = null;
        _IsWindowsService = collection.Contains(nameof(WindowsServiceLifetime));
    }

    public override Task StopAsync(CancellationToken cancellationToken) {
        if (_AppSettings.GatusToMonaConfiguration.Helper == nameof(Helpers.HelperGatusToMona))
            Helpers.HelperGatusToMona.Heartbeat(_AppSettings, _HttpClientFactory, _Logger, Infineon.Monitoring.MonA.State.Down, cancellationToken);
        return base.StopAsync(cancellationToken);
    }

    private async Task Body(CancellationToken cancellationToken) {
        if (!_IsWindowsService) {
            _Logger.LogInformation("Set break point and skip to run {_AppSettings.GatusToMonaConfiguration.Helper}!", _AppSettings.GatusToMonaConfiguration.Helper);
            throw new EvaluateException($"Set break point and skip to run {_AppSettings.GatusToMonaConfiguration.Helper}!");
        }
        if (!_IsWindowsService) {
            for (int i = 0; i < int.MaxValue; i++) {
                BodyInner(cancellationToken);
                Thread.Sleep(_AppSettings.GatusToMonaConfiguration.MillisecondsDelay);
            }
        }
        while (_IsWindowsService && !cancellationToken.IsCancellationRequested) {
            BodyInner(cancellationToken);
            await Task.Delay(_AppSettings.GatusToMonaConfiguration.MillisecondsDelay, cancellationToken);
        }
    }

    private void BodyInner(CancellationToken cancellationToken) {
        _Logger.LogInformation("A) Next execute will be at {date}", DateTime.Now.AddMilliseconds(_AppSettings.GatusToMonaConfiguration.MillisecondsDelay).ToString("yyyy-MM-dd hh:mm:ss.fff tt"));
        if (_First is null || _First.Value) {
            _First = false;
            if (_AppSettings.GatusToMonaConfiguration.Helper == nameof(Helpers.HelperGatusToMona))
                Helpers.HelperGatusToMona.Heartbeat(_AppSettings, _HttpClientFactory, _Logger, Infineon.Monitoring.MonA.State.Up, cancellationToken);
        }
        if (!Directory.Exists(_AppSettings.GatusToMonaConfiguration.Directory))
            _ = Directory.CreateDirectory(_AppSettings.GatusToMonaConfiguration.Directory);
        else {
            _ = _AppSettings.GatusToMonaConfiguration.Helper switch {
                nameof(Helpers.HelperGatusToMona) => Helpers.HelperGatusToMona.UpdateCount(_AppSettings, _Logger, cancellationToken),
                _ => throw new NotSupportedException()
            };
        }
        _Logger.LogInformation("B) Next execute will be at {date}", DateTime.Now.AddMilliseconds(_AppSettings.GatusToMonaConfiguration.MillisecondsDelay).ToString("yyyy-MM-dd hh:mm:ss.fff tt"));
    }

    protected override async Task ExecuteAsync(CancellationToken cancellationToken) =>
        await Body(cancellationToken);

}