using System;
using System.Threading;
using BriarQueen.Data.Identifiers;
using BriarQueen.Data.IO.Saves;
using BriarQueen.Framework.Effects;
using BriarQueen.Framework.Events.Save;
using BriarQueen.Framework.Managers.Interaction;
using BriarQueen.Framework.Services.Puzzles.Base;
using BriarQueen.Game.Levels.ChapterOne.Ashwick;
using Cysharp.Threading.Tasks;
using MemoryPack;
using PrimeTween;
using TMPro;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.UI;
using VContainer;

namespace BriarQueen.Game.Puzzles.ChapterOne.AshwickHallow
{
    [MemoryPackable]
    public partial class AshwickGateKeypadPuzzleState
    {
        public string Digits;
    }

    public class AshwickGateKeypadPuzzle : BasePuzzle, IPuzzleStateful
    {
        private const string CorrectCode = "312";
        private const int RequiredDigits = 3;

        [Header("Scene References")]
        [SerializeField] private AshwickOutskirts _outskirts;
        [SerializeField] private CanvasGroup _panelGroup;
        [SerializeField] private TMP_InputField _displayField;
        [SerializeField] private UILightGlow _statusGlow;
        [SerializeField] private GraphicRaycaster _graphicRaycaster;
        [SerializeField] private Button _closeButton;
        [SerializeField] private Button[] _digitButtons = new Button[9];

        [Header("Light Colors")]
        [SerializeField] private Color _incorrectGlowColor = new(0.85f, 0.2f, 0.2f, 1f);
        [SerializeField] private Color _correctGlowColor = new(0.2f, 0.85f, 0.35f, 1f);

        [Header("Timing")]
        [SerializeField] private float _feedbackDuration = 0.35f;

        [SerializeField] private TweenSettings _panelFadeTweenSettings = new()
        {
            duration        = 1.5f,
            ease            = Ease.OutQuad,
            useUnscaledTime = true
        };

        private readonly UnityAction[] _digitCallbacks = new UnityAction[9];

        private InteractManager _interactManager;
        private CancellationTokenSource _panelCts;
        private Sequence _panelSequence;

        private string _currentDigits = string.Empty;
        private bool _isCompleted;
        private bool _isEvaluating;
        private bool _isOpen;
        private bool _raycasterRegistered;

        public override string PuzzleID => PuzzleIdentifiers.AllPuzzles[PuzzleKey.AshwickMarketGate];
        public bool IsCompleted => _isCompleted || SaveManager.GetLevelFlag(LevelFlag.AshwickGateOpen);

        [Inject]
        public void ConstructKeypad(InteractManager interactManager)
        {
            _interactManager = interactManager;
        }

        private void Awake()
        {
            if (_displayField != null)
            {
                _displayField.readOnly = true;
                _displayField.text = string.Empty;
            }

            BindButtons();
            SetPanelState(0f, false, false);
            SyncDisplay();
        }

        private void OnDestroy()
        {
            UnbindButtons();
            TryUnregisterRaycaster();
            CancelPanelTween();
        }

        public override UniTask PostLoad()
        {
            _isCompleted = SaveManager.GetLevelFlag(LevelFlag.AshwickGateOpen);
            _isOpen = false;
            _isEvaluating = false;

            SetPanelState(0f, false, false);
            SyncDisplay();
            _statusGlow?.TurnOff().Forget();

            return UniTask.CompletedTask;
        }

        public override UniTask CompletePuzzle()
        {
            return CompletePuzzleInternal();
        }

        public void Open()
        {
            OpenInternal().Forget();
        }

        public void Close()
        {
            CloseInternal(requestSave: true).Forget();
        }

        public UniTask<byte[]> CaptureState()
        {
            var state = new AshwickGateKeypadPuzzleState
            {
                Digits = IsCompleted ? string.Empty : _currentDigits
            };

            return UniTask.FromResult(MemoryPackSerializer.Serialize(state));
        }

        public UniTask RestoreState(byte[] state)
        {
            _isCompleted = SaveManager.GetLevelFlag(LevelFlag.AshwickGateOpen);
            _currentDigits = string.Empty;

            if (!_isCompleted && state is { Length: > 0 })
            {
                var restored = MemoryPackSerializer.Deserialize<AshwickGateKeypadPuzzleState>(state);
                _currentDigits = restored?.Digits ?? string.Empty;

                if (_currentDigits.Length > RequiredDigits)
                    _currentDigits = _currentDigits[..RequiredDigits];
            }

            SyncDisplay();
            return UniTask.CompletedTask;
        }

        private async UniTask CompletePuzzleInternal()
        {
            if (IsCompleted || _outskirts == null)
                return;

            _isCompleted = true;
            _currentDigits = string.Empty;
            SyncDisplay();

            SaveManager.SetPuzzleCompleted(PuzzleKey.AshwickMarketGate, true, requestSave: false);

            await CloseInternal(requestSave: false);
            await _outskirts.OpenGate();
        }

        private async UniTaskVoid OpenInternal()
        {
            if (IsCompleted || _isEvaluating || _isOpen)
                return;

            _isOpen = true;
            ResetPanelTween();

            SetPanelState(0f, false, true);
            SyncDisplay();
            TryRegisterRaycaster();
            _statusGlow?.TurnOff().Forget();

            try
            {
                _panelSequence = Sequence.Create(useUnscaledTime: true)
                    .Group(Tween.Alpha(_panelGroup, new TweenSettings<float>
                    {
                        startValue = 0f,
                        endValue   = 1f,
                        settings   = _panelFadeTweenSettings
                    }));

                await _panelSequence.ToUniTask(cancellationToken: _panelCts.Token);
            }
            catch (OperationCanceledException)
            {
                return;
            }
            finally
            {
                _panelSequence = default;
            }

            SetPanelState(1f, true, true);
        }

        private async UniTask CloseInternal(bool requestSave)
        {
            if (!_isOpen)
                return;

            _isOpen = false;
            ResetPanelTween();

            if (_panelGroup != null)
            {
                _panelGroup.interactable = false;
                _panelGroup.blocksRaycasts = true;
            }

            try
            {
                _panelSequence = Sequence.Create(useUnscaledTime: true)
                    .Group(Tween.Alpha(_panelGroup, new TweenSettings<float>
                    {
                        startValue = _panelGroup != null ? _panelGroup.alpha : 0f,
                        endValue   = 0f,
                        settings   = _panelFadeTweenSettings
                    }));

                await _panelSequence.ToUniTask(cancellationToken: _panelCts.Token);
            }
            catch (OperationCanceledException)
            {
                return;
            }
            finally
            {
                _panelSequence = default;
            }

            SetPanelState(0f, false, false);
            TryUnregisterRaycaster();

            if (requestSave)
                EventCoordinator.PublishImmediate(new RequestGameSaveEvent());
        }

        private void OnDigitPressed(int digit)
        {
            if (_isEvaluating || IsCompleted || !_isOpen || _currentDigits.Length >= RequiredDigits)
                return;

            _currentDigits += digit.ToString();
            SyncDisplay();

            if (_currentDigits.Length == RequiredDigits)
                EvaluateCode().Forget();
        }

        private async UniTaskVoid EvaluateCode()
        {
            _isEvaluating = true;

            if (_panelGroup != null)
                _panelGroup.interactable = false;

            if (_currentDigits == CorrectCode)
            {
                if (_statusGlow != null)
                {
                    _statusGlow.SetLightColor(_correctGlowColor);
                    await _statusGlow.TurnOn();
                }

                await CompletePuzzleInternal();
            }
            else
            {
                if (_statusGlow != null)
                {
                    _statusGlow.SetLightColor(_incorrectGlowColor);
                    await _statusGlow.TurnOn();
                }

                _currentDigits = string.Empty;
                SyncDisplay();

                if (_statusGlow != null)
                    await _statusGlow.TurnOff();

                if (_isOpen && _panelGroup != null)
                    _panelGroup.interactable = true;
            }

            _isEvaluating = false;
        }

        private void BindButtons()
        {
            for (var i = 0; i < _digitButtons.Length; i++)
            {
                var button = _digitButtons[i];
                if (button == null)
                    continue;

                var digit = i + 1;
                _digitCallbacks[i] = () => OnDigitPressed(digit);
                button.onClick.AddListener(_digitCallbacks[i]);
            }

            if (_closeButton != null)
                _closeButton.onClick.AddListener(Close);
        }

        private void UnbindButtons()
        {
            for (var i = 0; i < _digitButtons.Length; i++)
            {
                var button = _digitButtons[i];
                if (button == null || _digitCallbacks[i] == null)
                    continue;

                button.onClick.RemoveListener(_digitCallbacks[i]);
                _digitCallbacks[i] = null;
            }

            if (_closeButton != null)
                _closeButton.onClick.RemoveListener(Close);
        }

        private void SyncDisplay()
        {
            if (_displayField == null)
                return;

            _displayField.text = _currentDigits;
        }

        private void SetPanelState(float alpha, bool interactable, bool blocksRaycasts)
        {
            if (_panelGroup == null)
                return;

            _panelGroup.alpha = alpha;
            _panelGroup.interactable = interactable;
            _panelGroup.blocksRaycasts = blocksRaycasts;
        }

        private void ResetPanelTween()
        {
            CancelPanelTween();
            _panelCts = new CancellationTokenSource();
        }

        private void CancelPanelTween()
        {
            if (_panelSequence.isAlive)
                _panelSequence.Stop();

            if (_panelCts != null)
            {
                try
                {
                    _panelCts.Cancel();
                }
                catch
                {
                }

                _panelCts.Dispose();
                _panelCts = null;
            }
        }

        private void TryRegisterRaycaster()
        {
            if (_raycasterRegistered || _interactManager == null || _graphicRaycaster == null)
                return;

            _interactManager.AddUIRaycaster(_graphicRaycaster);
            _interactManager.SetExclusiveRaycaster(_graphicRaycaster);
            _raycasterRegistered = true;
        }

        private void TryUnregisterRaycaster()
        {
            if (!_raycasterRegistered || _interactManager == null || _graphicRaycaster == null)
                return;

            _interactManager.RemoveUIRaycaster(_graphicRaycaster);
            _interactManager.ClearExclusiveRaycaster();
            _raycasterRegistered = false;
        }
    }
}