using Akari.Provider.WaveshareUART.Users;
using System;
using System.Threading;
using WaveshareUARTFingerprintSensor;

namespace Akari.Provider.WaveshareUART
{
    public class MQTTService
    {
        public FingerprintSensor FingerprintSensor => WaveshareUARTProvider.Instance.FingerprintSensor;
        public UsersManager UsersManager => WaveshareUARTProvider.Instance.UsersManager;

        public MQTTService()
        {

        }

        public void Start()
        {
            Console.WriteLine("Starting MQTT service...");

            InitMQTT();

            Console.WriteLine($"There is {UsersManager.Count} users registered");

            FingerprintSensor.Waked += FingerprintSensor_Waked;

            FingerprintSensor.Sleep();

            Console.WriteLine("Waiting for fingerprints...");

            Thread.Sleep(-1);

            FingerprintSensor.Waked -= FingerprintSensor_Waked;
        }

        private void InitMQTT()
        {
            // TODO
        }

        private void SendAuth(User user)
        {
            // TODO
        }

        private void FingerprintSensor_Waked(FingerprintSensor sender)
        {
            FingerprintSensor.Wake();

            if (FingerprintSensor.TryComparison1N(out var userInfo))
            {
                if (TryFindUser(userInfo.userID, out var user))
                {
                    Console.WriteLine($"{user.Name} fingerprint recognized");

                    SendAuth(user);
                }
                else
                {
                    Console.WriteLine($"Found unknown fingerprint with id {userInfo.userID}");
                }
            }

            FingerprintSensor.Sleep();
        }

        private bool TryFindUser(ushort userID, out User user)
        {
            ushort id = (ushort)((userID / UsersManager.RangeLength) * UsersManager.RangeLength + UsersManager.RangeStart);

            if (UsersManager[id] is User u)
            {
                user = u;

                return true;
            }

            user = default;

            return false;
        }
    }
}