using System;
using System.Threading;
using BriarQueen.Framework.Managers.Levels.Data;
using BriarQueen.Framework.Managers.Player.Data;
using Cysharp.Threading.Tasks;
using PrimeTween;
using UnityEngine;
using UnityEngine.UI;

namespace BriarQueen.Game.Levels.ChapterOne.LaxleyHouse.FireplaceLockbox
{
    public class LockboxSlot : BaseItem
    {
        private const int MinDigit = 1;
        private const int MaxDigit = 9;

        [Header("Components")]
        [SerializeField]
        private Image _currentNumberImage;

        [SerializeField]
        private Image _nextNumberImage;

        [Header("Animation")]
        [SerializeField]
        private float _spinPadding = 8f;

        [SerializeField]
        private float _spinDuration = 0.15f;

        [SerializeField]
        private Ease _spinEase = Ease.OutCubic;

        [SerializeField]
        [Range(0f, 1f)]
        private float _fadedAlpha = 0.4f;

        private RectTransform _currentRect;
        private RectTransform _nextRect;

        private Sequence _slotSequence;
        private CancellationTokenSource _slotCancellationTokenSource;

        private Func<int, Sprite> _spriteResolver;
        private Action _onValueChanged;

        public int CurrentValue { get; private set; } = MinDigit;

        public void Initialize(Func<int, Sprite> spriteResolver, Action onValueChanged)
        {
            _spriteResolver = spriteResolver;
            _onValueChanged = onValueChanged;

            _currentRect = _currentNumberImage != null ? _currentNumberImage.rectTransform : null;
            _nextRect = _nextNumberImage != null ? _nextNumberImage.rectTransform : null;

            SyncHelperImageLayout();
            ApplyValueImmediate(CurrentValue);
        }

        public void ApplyValueImmediate(int value)
        {
            CurrentValue = WrapValue(value);

            CancelTweenIfRunning();
            SyncHelperImageLayout();

            var sprite = ResolveSprite(CurrentValue);

            if (_currentNumberImage != null)
            {
                _currentNumberImage.sprite = sprite;
                _currentNumberImage.enabled = sprite != null;
                _currentNumberImage.color = Color.white;
            }

            if (_nextNumberImage != null)
            {
                _nextNumberImage.sprite = null;
                _nextNumberImage.enabled = false;
                _nextNumberImage.color = Color.white;
            }

            if (_currentRect != null)
                _currentRect.anchoredPosition = Vector2.zero;

            if (_nextRect != null)
                _nextRect.anchoredPosition = GetHiddenPosition();
        }

        public override async UniTask OnInteract(ItemDataSo item = null)
        {
            if (item != null)
                return;

            await SpinToNextValue();
        }

        public async UniTask SpinToNextValue()
        {
            if (_currentNumberImage == null || _nextNumberImage == null || _currentRect == null || _nextRect == null)
                return;

            int nextValue = WrapValue(CurrentValue + 1);
            var nextSprite = ResolveSprite(nextValue);

            if (nextSprite == null)
            {
                Debug.LogWarning($"[LockboxSlot] Missing sprite for value {nextValue}.", this);
                return;
            }

            CancelTweenIfRunning();
            SyncHelperImageLayout();

            _slotCancellationTokenSource = new CancellationTokenSource();

            _nextNumberImage.sprite = nextSprite;
            _nextNumberImage.enabled = true;
            _nextNumberImage.color = new Color(1f, 1f, 1f, _fadedAlpha);

            _currentNumberImage.enabled = true;
            _currentNumberImage.color = Color.white;

            _currentRect.anchoredPosition = Vector2.zero;
            _nextRect.anchoredPosition = GetHiddenPosition();

            _slotSequence = Sequence.Create(useUnscaledTime: true)
                .Group(Tween.UIAnchoredPosition(
                    _currentRect,
                    GetVisibleExitPosition(),
                    _spinDuration,
                    _spinEase,
                    useUnscaledTime: true))
                .Group(Tween.UIAnchoredPosition(
                    _nextRect,
                    Vector2.zero,
                    _spinDuration,
                    _spinEase,
                    useUnscaledTime: true))
                .Group(Tween.Alpha(
                    _currentNumberImage,
                    new TweenSettings<float>
                    {
                        endValue = _fadedAlpha,
                        settings = new TweenSettings
                        {
                            duration = _spinDuration,
                            useUnscaledTime = true
                        }
                    }))
                .Group(Tween.Alpha(
                    _nextNumberImage,
                    new TweenSettings<float>
                    {
                        endValue = 1f,
                        settings = new TweenSettings
                        {
                            duration = _spinDuration,
                            useUnscaledTime = true
                        }
                    }));

            try
            {
                await _slotSequence.ToUniTask(cancellationToken: _slotCancellationTokenSource.Token);
            }
            catch (OperationCanceledException)
            {
                return;
            }
            finally
            {
                if (_slotSequence.isAlive)
                    _slotSequence.Stop();

                _slotSequence = default;

                _slotCancellationTokenSource?.Dispose();
                _slotCancellationTokenSource = null;
            }

            SwapImages();
            CurrentValue = nextValue;

            PrepareHiddenImage();
            _onValueChanged?.Invoke();
        }

        private Sprite ResolveSprite(int value)
        {
            return _spriteResolver?.Invoke(WrapValue(value));
        }

        private int WrapValue(int value)
        {
            value %= MaxDigit;

            if (value <= 0)
                value += MaxDigit;

            return value;
        }

        private void SwapImages()
        {
            (_currentNumberImage, _nextNumberImage) = (_nextNumberImage, _currentNumberImage);
            (_currentRect, _nextRect) = (_nextRect, _currentRect);
        }

        private void PrepareHiddenImage()
        {
            if (_currentNumberImage != null)
            {
                _currentNumberImage.enabled = true;
                _currentNumberImage.color = Color.white;
            }

            if (_currentRect != null)
                _currentRect.anchoredPosition = Vector2.zero;

            if (_nextNumberImage != null)
            {
                _nextNumberImage.sprite = null;
                _nextNumberImage.enabled = false;
                _nextNumberImage.color = Color.white;
            }

            if (_nextRect != null)
                _nextRect.anchoredPosition = GetHiddenPosition();
        }

        private void SyncHelperImageLayout()
        {
            if (_currentRect == null || _nextRect == null)
                return;

            _nextRect.anchorMin = _currentRect.anchorMin;
            _nextRect.anchorMax = _currentRect.anchorMax;
            _nextRect.pivot = _currentRect.pivot;
            _nextRect.sizeDelta = _currentRect.sizeDelta;
            _nextRect.localScale = _currentRect.localScale;
            _nextRect.localRotation = _currentRect.localRotation;
        }

        private Vector2 GetHiddenPosition()
        {
            float travelDistance = GetTravelDistance();
            return new Vector2(0f, -travelDistance);
        }

        private Vector2 GetVisibleExitPosition()
        {
            float travelDistance = GetTravelDistance();
            return new Vector2(0f, travelDistance);
        }

        private float GetTravelDistance()
        {
            if (_currentRect == null)
                return _spinPadding;

            float rectHeight = _currentRect.rect.height;

            if (rectHeight <= 0f && _currentNumberImage != null)
                rectHeight = _currentNumberImage.preferredHeight;

            return rectHeight + _spinPadding;
        }

        private void CancelTweenIfRunning()
        {
            if (_slotCancellationTokenSource != null && !_slotCancellationTokenSource.IsCancellationRequested)
                _slotCancellationTokenSource.Cancel();

            if (_slotSequence.isAlive)
                _slotSequence.Stop();

            _slotSequence = default;

            _slotCancellationTokenSource?.Dispose();
            _slotCancellationTokenSource = null;
        }

        private void OnDisable()
        {
            CancelTweenIfRunning();
        }

        private void OnDestroy()
        {
            CancelTweenIfRunning();
        }
    }
}