using System;
using RR.Game2D.Core.Managers;
using UnityEngine;
using UnityEngine.Events;

namespace RR.Common.Controls
{
    /// <summary>
    /// Публичный компонент COM-системы.
    /// </summary>
    [AddComponentMenu("RR/Controls/Com System Manager")]
    public class ComSystemManager : MonoBehaviour
    {
        private enum ControllerHandlerType
        {
            Default = 0,
            PrizeStand = 1
        }

        [Serializable]
        private sealed class RoleHandlerBinding
        {
            public string role;
            public ControllerHandlerType handlerType = ControllerHandlerType.Default;
            [Min(0)] public int prizeStandBoxesCount;
        }

        [Header("Основные настройки")]
        [SerializeField] private bool saveMoneyBetweenSessions;
        [SerializeField] private bool enablePrizeChecking;
        [SerializeField] private bool keepAlive = true;

        [Header("Авторизация")]
        [SerializeField] private bool enableEncryptedHandshake = true;
        [SerializeField] private int handshakeTimeoutMs = 5000;

        [Header("Роль контроллера (после handshake)")]
        [SerializeField] private string roleRequestCommand = "97";
        [SerializeField] private string roleResponsePrefix = "ROLE";
        [SerializeField] private int roleRequestTimeoutMs = 1500;
        [SerializeField] private string mainControllerRole = "main_controller";

        [Header("Мульти-устройства")]
        [SerializeField] private bool useAllDetectedPorts = true;
        [SerializeField] private string[] explicitPorts = Array.Empty<string>();
        [SerializeField] private string defaultDevicePort = "";

        [Header("Фабрика обработчиков по ROLE")]
        [SerializeField] private RoleHandlerBinding[] roleHandlerBindings =
        {
            new RoleHandlerBinding { role = "prize_stand", handlerType = ControllerHandlerType.PrizeStand, prizeStandBoxesCount = 24 },
            new RoleHandlerBinding { role = "prize_stand_controller", handlerType = ControllerHandlerType.PrizeStand, prizeStandBoxesCount = 24 }
        };

        public static UnityEvent<int> OnCreditAdded;
        public static UnityEvent<int> OnCreditRemoved;
        public static UnityEvent<string> OnInputReceived;
        public static Action OnInitialize;

        public static UnityEvent<string, string> OnDeviceInputReceived;
        public static UnityEvent<string> OnDeviceAuthorized;

        private static ComSystemManager _instance;
        private static int _creditsCount;

        private ComHub _manager;
        private LightController _light;
        private bool _initializeInvoked;

        public LightController Light => _light;

        public void Initialize()
        {
            _instance = this;

            OnCreditAdded = new UnityEvent<int>();
            OnCreditRemoved = new UnityEvent<int>();
            OnInputReceived = new UnityEvent<string>();
            OnDeviceInputReceived = new UnityEvent<string, string>();
            OnDeviceAuthorized = new UnityEvent<string>();

            if (!saveMoneyBetweenSessions) PlayerPrefs.SetInt("CoinsCount", 0);
            _creditsCount = PlayerPrefs.GetInt("CoinsCount", 0);

            _light = GetComponent<LightController>() ?? gameObject.AddComponent<LightController>();

            _manager = new ComHub(
                useAllDetectedPorts,
                explicitPorts,
                defaultDevicePort,
                enableEncryptedHandshake,
                handshakeTimeoutMs,
                keepAlive || enablePrizeChecking,
                roleRequestCommand,
                roleResponsePrefix,
                roleRequestTimeoutMs,
                mainControllerRole,
                CreateRoleHandler);

            _manager.InitializeDevices();
        }

        public static void AddCredit()
        {
            _creditsCount++;
            PlayerPrefs.SetInt("CoinsCount", _creditsCount);
            OnCreditAdded?.Invoke(_creditsCount);
        }

        public static bool Pay(int amount = 1)
        {
            if (_creditsCount < amount)
            {
                return false;
            }

            _creditsCount -= amount;
            PlayerPrefs.SetInt("CoinsCount", _creditsCount);

            PlayerPrefs.SetInt(PrizeSystem.key_starts, PlayerPrefs.GetInt(PrizeSystem.key_starts) + 1);
            PlayerPrefs.SetInt(PrizeSystem.key_startsNul, PlayerPrefs.GetInt(PrizeSystem.key_startsNul) + 1);

            OnCreditRemoved?.Invoke(_creditsCount);
            return true;
        }

        public static int GetCredits() => _creditsCount;

        public static void SetCredits(int amount)
        {
            int oldCredits = _creditsCount;
            _creditsCount = Mathf.Max(0, amount);
            PlayerPrefs.SetInt("CoinsCount", _creditsCount);

            if (_creditsCount > oldCredits)
            {
                OnCreditAdded?.Invoke(_creditsCount);
            }
            else if (_creditsCount < oldCredits)
            {
                OnCreditRemoved?.Invoke(_creditsCount);
            }
        }

        public static void Send(string message)
        {
            if (_instance == null || string.IsNullOrWhiteSpace(message)) return;
            _instance._manager?.SendToDefault(message);
        }

        public static void SendToDevice(string deviceId, string message)
        {
            if (_instance == null || string.IsNullOrWhiteSpace(message)) return;
            _instance._manager?.SendToDevice(deviceId, message);
        }

        public static void SendToAll(string message)
        {
            if (_instance == null || string.IsNullOrWhiteSpace(message)) return;
            _instance._manager?.SendToAll(message);
        }

        public static string GetLastInputState()
        {
            if (_instance?._manager == null) return "11111111111111111111111111";
            string defaultId = _instance._manager.DefaultDeviceId;
            return string.IsNullOrWhiteSpace(defaultId)
                ? "11111111111111111111111111"
                : _instance._manager.GetLastInputState(defaultId);
        }

        public static string GetLastInputState(string deviceId)
        {
            return _instance?._manager?.GetLastInputState(deviceId) ?? "11111111111111111111111111";
        }

        public static string[] GetConnectedDeviceIds()
        {
            return _instance?._manager?.ConnectedDeviceIds ?? Array.Empty<string>();
        }

        public static string GetDefaultDeviceId()
        {
            return _instance?._manager?.DefaultDeviceId ?? string.Empty;
        }

        public static string GetDeviceRole(string deviceId)
        {
            return _instance?._manager?.GetDeviceRole(deviceId) ?? string.Empty;
        }

        public static PrizeStandController GetPrizeStandController(string deviceId = null)
        {
            return _instance?._manager?.GetPrizeStandController(deviceId);
        }

        private IComControllerHandler CreateRoleHandler(string deviceId, string role)
        {
            if (string.IsNullOrWhiteSpace(role) || roleHandlerBindings == null || roleHandlerBindings.Length == 0)
            {
                return null;
            }

            RoleHandlerBinding binding = FindRoleBinding(role);
            if (binding == null)
            {
                return null;
            }

            if (binding.handlerType == ControllerHandlerType.PrizeStand)
            {
                PrizeStandController controller = new PrizeStandController(
                    deviceId,
                    (id, message) => _manager != null && _manager.SendToDevice(id, message),
                    message => GameManager.Logger?.Log("PrizeStandController", $"[{deviceId}] {message}"));

                controller.SetBoxesCount(binding.prizeStandBoxesCount);
                return controller;
            }

            return null;
        }

        private RoleHandlerBinding FindRoleBinding(string role)
        {
            for (int i = 0; i < roleHandlerBindings.Length; i++)
            {
                RoleHandlerBinding binding = roleHandlerBindings[i];
                if (binding == null || string.IsNullOrWhiteSpace(binding.role))
                {
                    continue;
                }

                if (string.Equals(binding.role.Trim(), role.Trim(), StringComparison.OrdinalIgnoreCase))
                {
                    return binding;
                }
            }

            return null;
        }

        public void Blink() => _light.Blink();

        public void StopBlink(bool enableHat = true) => _light.StopBlink(enableHat);

        private void Update()
        {
            if (_manager == null) return;

            int coinsProcessed = 0;
            while (_manager.TryDequeueCoin(out _))
            {
                AddCredit();
                coinsProcessed++;
            }

            while (_manager.TryDequeueInput(out DeviceInputMessage msg))
            {
                OnDeviceInputReceived?.Invoke(msg.DeviceId, msg.InputBits);

                if (msg.DeviceId == _manager.DefaultDeviceId)
                {
                    OnInputReceived?.Invoke(msg.InputBits);
                }
            }

            while (_manager.TryDequeueAuthorized(out string deviceId))
            {
                OnDeviceAuthorized?.Invoke(deviceId);

                if (!_initializeInvoked)
                {
                    _initializeInvoked = true;
                    OnInitialize?.Invoke();
                }

                if (deviceId == _manager.DefaultDeviceId)
                {
                    _light.Blink();
                }
            }

            if (coinsProcessed > 0)
            {
                GameManager.Logger?.Log("ComSystemManager", $"Обработано монет: {coinsProcessed}");
            }
        }

        private void OnDisable()
        {
            _manager?.ShutdownAll(false);
            _manager = null;
            _initializeInvoked = false;
        }

        private void OnApplicationQuit()
        {
            _manager?.ShutdownAll(true);
            _manager = null;
            _initializeInvoked = false;
        }
    }
}