using System;
using Jugenddienst_Stunden.Models;
using Jugenddienst_Stunden.ViewModels;
using Microsoft.Maui.Controls;
using System.Collections.Generic;
using ZXing.Net.Maui;

namespace Jugenddienst_Stunden.Views;

/// <summary>
/// Die Loginseite mit dem Barcodescanner
/// </summary>
public partial class LoginPage : ContentPage {

	private DateTime _lastDetectionTime;
	private readonly TimeSpan _detectionInterval = TimeSpan.FromSeconds(5);

	/// <summary>
	/// CTOR
	/// </summary>
	public LoginPage() {
		InitializeComponent();

		//if (BindingContext is LoginViewModel vm) {
		//	vm.AlertEvent += Vm_AlertEvent;
		//	vm.InfoEvent += Vm_InfoEvent;
		//	vm.MsgEvent += Vm_MsgEvent;
		//}

		barcodeScannerView.Options = new ZXing.Net.Maui.BarcodeReaderOptions {
			Formats = ZXing.Net.Maui.BarcodeFormat.QrCode,
			AutoRotate = true,
			Multiple = false
		};
	}


	private void BarcodesDetected(object sender, ZXing.Net.Maui.BarcodeDetectionEventArgs e) {
		var currentTime = DateTime.Now;
		if ((currentTime - _lastDetectionTime) > _detectionInterval) {
			_lastDetectionTime = currentTime;
			foreach (var barcode in e.Results) {
				if (Stunde.apiKey != barcode.Value) {
					_ = MainThread.InvokeOnMainThreadAsync(async () => {
						//await DisplayAlert("Barcode erkannt", $"Barcode: {barcode.Format} - {barcode.Value}", "OK");

						try {
							var tokendata = new TokenData(barcode.Value);
							var op = await Models.Operator.LoadData(barcode.Value);
							Models.Stunde.apiKey = barcode.Value;
							Models.Stunde.name = op.name;
							Models.Stunde.surname = op.surname;
							Models.Stunde.EmployeeId = int.Parse(op.id);
							Title = op.name + " " + op.surname;
							ServerLabel.Text = "Server: " + tokendata.url.Replace("/appapi", "").Replace("https://", "").Replace("http://", "");

							Preferences.Default.Set("apiKey", barcode.Value);
							Preferences.Default.Set("name", op.name);
							Preferences.Default.Set("surname", op.surname);
							Preferences.Default.Set("EmployeeId", int.Parse(op.id));

							await DisplayAlert("Login erfolgreich", op.name + " " + op.surname, "OK");
							await Navigation.PopAsync();
						} catch (Exception e) {
							await DisplayAlert("Fehler", e.Message, "OK");
						}

					});
				} else {
					MainThread.InvokeOnMainThreadAsync(() => {
						DisplayAlert("Bereits eingeloggt",
							Preferences.Default.Get("name", "") + " " + Preferences.Default.Get("surname", ""),
							"OK");
					});
				}
			}
		}

	}

	protected override void OnDisappearing() {
		base.OnDisappearing();
		barcodeScannerView.CameraLocation = CameraLocation.Front;
		barcodeScannerView.IsDetecting = false;

	}

	protected override void OnAppearing() {
		base.OnAppearing();

		barcodeScannerView.IsDetecting = true;
		barcodeScannerView.CameraLocation = CameraLocation.Rear;
	}

	//private void Vm_AlertEvent(object? sender, string e) {
	//	DisplayAlert("Fehler:", e, "OK");
	//}
	//private void Vm_InfoEvent(object? sender, string e) {
	//	DisplayAlert("Information:", e, "OK");
	//}
	//private async Task Vm_MsgEvent(string title, string message) {
	//	await DisplayAlert(title, message, "OK");
	//}
}