using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Reflection;
using Motorola.Snapi;
using Motorola.Snapi.Constants;
using Motorola.Snapi.Constants.Enums;
using Motorola.Snapi.EventArguments;

namespace Motorola.Examples
{
    static class Program
    {
        private static List<IMotorolaBarcodeScanner> _scanners;
        private static string _lastScanned;

        static void Main()
        {
            //First open an instance of the CoreScanner driver.
            BarcodeScannerManager.Instance.Open();
            //Register for events.
            BarcodeScannerManager.Instance.RegisterForEvents(
                EventType.Barcode,
                EventType.Pnp,
                EventType.Image,
                EventType.Other,
                EventType.Rmd
                );
            //If you need to unregister
            BarcodeScannerManager.Instance.UnRegisterForEvents(
                EventType.Barcode,
                EventType.Pnp,
                EventType.Image,
                EventType.Other,
                EventType.Rmd
                );
            //The events you are currently registered to will be listed in RegisteredEvents.
            if (BarcodeScannerManager.Instance.RegisteredEvents.Contains(EventType.Image))
            {
                //Do things
            };
            
            //Turn off keyboard emulation
            BarcodeScannerManager.Instance.Keyboard.EnableEmulation = false;

            //Get a List<IMotorolaBarcodeScanner> containing each connected scanner.
            _scanners = BarcodeScannerManager.Instance.GetDevices();

            //Loop through scanners and set their host mode to SNAPI with imaging enabled.
            foreach (var scanner in _scanners)
            {
                scanner.SetHostMode(HostMode.USB_SNAPI_Imaging);
            }

            //Add a handler for barcode scans.
            BarcodeScannerManager.Instance.DataReceived += OnDataReceived;

            Console.WriteLine("Ready to scan.. (Enter to quit)");
            Console.ReadLine();
        }

        //Outputs barcode data to the console and overwrites _lastScanned.
        private static void OnDataReceived(object sender, BarcodeScanEventArgs e)
        {
            _lastScanned = e.Data;
            Console.WriteLine("Barcode type: " + e.BarcodeType.GetDescription());
            Console.WriteLine("Data: " + e.Data);
        }

        //Gets the description out of an Enum
        public static string GetDescription(this Enum value)
        {
            FieldInfo fi = value.GetType().GetField(value.ToString());

            DescriptionAttribute[] attributes =
                (DescriptionAttribute[])fi.GetCustomAttributes(
                typeof(DescriptionAttribute),
                false);

            if (attributes != null &&
                attributes.Length > 0)
                return attributes[0].Description;
            else
                return value.ToString();
        }
    }
}