using System;
using System.Collections;
using Core;
using Data.CardSystem;
using Pixelplacement;
using UnityEngine;
using UnityEngine.UI;

namespace UI.CardSystem
{
    /// <summary>
    /// UI component for granting booster packs from minigames.
    /// Supports awarding 1 to N booster packs with visual animations.
    /// Shows up to 3 booster packs visually. For more than 3, duplicates the first pack and tweens them sequentially.
    /// </summary>
    public class MinigameBoosterGiver : MonoBehaviour
    {
        public static MinigameBoosterGiver Instance { get; private set; }

        [Header("Visual References")]
        [SerializeField] private GameObject visualContainer;
        [SerializeField] private RectTransform[] boosterImages; // Up to 3 booster pack visuals
        [SerializeField] private RectTransform glowImage;       // Single glow effect for all boosters
        [SerializeField] private Button continueButton;

        [Header("Animation Settings")]
        [SerializeField] private float hoverAmount = 20f;
        [SerializeField] private float hoverDuration = 1.5f;
        [SerializeField] private float glowPulseMax = 1.1f;
        [SerializeField] private float glowPulseDuration = 1.2f;
        
        [Header("Disappear Animation")]
        [SerializeField] private Vector2 targetBottomLeftOffset = new Vector2(100f, 100f);
        [SerializeField] private float tweenDuration = 0.8f;
        [SerializeField] private float delayBetweenTweens = 0.2f;
        [SerializeField] private float disappearScale = 0.2f;

        private Vector3[] _boosterInitialPositions;
        private Vector3[] _boosterInitialScales;
        private Vector3 _glowInitialScale;
        private Coroutine _currentSequence;
        private Action _onCompleteCallback;
        private int _totalPackCount = 1;

        private void Awake()
        {
            // Singleton pattern
            if (Instance != null && Instance != this)
            {
                Logging.Warning("[MinigameBoosterGiver] Duplicate instance found. Destroying.");
                Destroy(gameObject);
                return;
            }

            Instance = this;

            // Cache initial values for all booster images
            if (boosterImages != null && boosterImages.Length > 0)
            {
                _boosterInitialPositions = new Vector3[boosterImages.Length];
                _boosterInitialScales = new Vector3[boosterImages.Length];
                
                for (int i = 0; i < boosterImages.Length; i++)
                {
                    if (boosterImages[i] != null)
                    {
                        _boosterInitialPositions[i] = boosterImages[i].localPosition;
                        _boosterInitialScales[i] = boosterImages[i].localScale;
                    }
                }
            }

            if (glowImage != null)
            {
                _glowInitialScale = glowImage.localScale;
            }

            // Setup button listener
            if (continueButton != null)
            {
                continueButton.onClick.AddListener(OnContinueClicked);
            }

            // Start hidden
            if (visualContainer != null)
            {
                visualContainer.SetActive(false);
            }
        }

        /// <summary>
        /// Initialize the booster giver with a specific pack count.
        /// Shows up to 3 booster visuals based on count.
        /// </summary>
        /// <param name="packCount">Number of booster packs to grant</param>
        public void Initialize(int packCount)
        {
            _totalPackCount = Mathf.Max(1, packCount);
            
            // Show up to 3 booster visuals
            int visualCount = Mathf.Min(_totalPackCount, boosterImages.Length);
            
            for (int i = 0; i < boosterImages.Length; i++)
            {
                bool shouldShow = i < visualCount;
                if (boosterImages[i] != null)
                {
                    boosterImages[i].gameObject.SetActive(shouldShow);
                }
            }
            
            Logging.Debug($"[MinigameBoosterGiver] Initialized with {_totalPackCount} packs, showing {visualCount} visuals");
        }

        private void OnDestroy()
        {
            if (Instance == this)
            {
                Instance = null;
            }

            if (continueButton != null)
            {
                continueButton.onClick.RemoveListener(OnContinueClicked);
            }
        }

        /// <summary>
        /// Public API to give a booster pack. Displays UI, starts animations, and waits for user interaction.
        /// </summary>
        /// <param name="onComplete">Optional callback when the sequence completes and pack is granted</param>
        public void GiveBooster(Action onComplete = null)
        {
            if (_currentSequence != null)
            {
                Logging.Warning("[MinigameBoosterGiver] Already running a sequence. Ignoring new request.");
                return;
            }

            _onCompleteCallback = onComplete;
            _currentSequence = StartCoroutine(GiveBoosterSequence());
        }

        private IEnumerator GiveBoosterSequence()
        {
            // Show the visual
            if (visualContainer != null)
            {
                visualContainer.SetActive(true);
            }

            // Reset positions and scales for visible boosters
            int visualCount = Mathf.Min(_totalPackCount, boosterImages.Length);
            
            for (int i = 0; i < visualCount; i++)
            {
                if (boosterImages[i] != null)
                {
                    boosterImages[i].localPosition = _boosterInitialPositions[i];
                    boosterImages[i].localScale = _boosterInitialScales[i];
                }
            }

            // Reset glow scale
            if (glowImage != null)
            {
                glowImage.localScale = _glowInitialScale;
            }

            // Enable the continue button
            if (continueButton != null)
            {
                continueButton.interactable = true;
            }

            // Start idle hovering animation on all visible boosters (ping-pong)
            for (int i = 0; i < visualCount; i++)
            {
                if (boosterImages[i] != null)
                {
                    Vector3 hoverTarget = _boosterInitialPositions[i] + Vector3.up * hoverAmount;
                    Tween.LocalPosition(boosterImages[i], hoverTarget, hoverDuration, 0f, Tween.EaseLinear, Tween.LoopType.PingPong);
                }
            }

            // Start pulsing animation on the single glow (ping-pong scale)
            if (glowImage != null)
            {
                Vector3 glowPulseScale = _glowInitialScale * glowPulseMax;
                Tween.LocalScale(glowImage, glowPulseScale, glowPulseDuration, 0f, Tween.EaseOut, Tween.LoopType.PingPong);
            }

            // Wait for button click (handled by OnContinueClicked)
            yield return null;
        }

        private void OnContinueClicked()
        {
            if (_currentSequence == null)
            {
                return; // Not in a sequence
            }

            // Disable and hide button to prevent double-clicks
            if (continueButton != null)
            {
                continueButton.interactable = false;
                continueButton.gameObject.SetActive(false);
            }

            // Start moving all boosters to backpack
            StartCoroutine(MoveAllBoostersToBackpack());
        }

        private IEnumerator MoveAllBoostersToBackpack()
        {
            // Show scrapbook button temporarily using HUD visibility context
            PlayerHudManager.HudVisibilityContext hudContext = null;
            GameObject scrapbookButton = PlayerHudManager.Instance?.GetScrabookButton();
            
            if (scrapbookButton != null)
            {
                hudContext = PlayerHudManager.Instance.ShowElementTemporarily(scrapbookButton);
            }
            else
            {
                Logging.Warning("[MinigameBoosterGiver] Scrapbook button not found in PlayerHudManager.");
            }

            // Calculate target position once
            Vector3 targetPosition = GetTargetPosition(scrapbookButton);
            
            int remaining = _totalPackCount;
            int visualCount = Mathf.Min(_totalPackCount, boosterImages.Length);
            
            // Stop and fade out the single glow immediately
            if (glowImage != null)
            {
                Tween.Stop(glowImage.GetInstanceID());
                Tween.LocalScale(glowImage, Vector3.zero, tweenDuration * 0.5f, 0f, Tween.EaseInBack);
            }
            
            // Phase 1: Animate duplicates for packs above 3 (if any)
            int duplicatesToAnimate = Mathf.Max(0, _totalPackCount - 3);
            
            for (int i = 0; i < duplicatesToAnimate; i++)
            {
                // Spawn duplicate at the first booster's current position
                if (boosterImages.Length > 0 && boosterImages[0] != null)
                {
                    StartCoroutine(TweenPackToBackpack(boosterImages[0], targetPosition, isDuplicate: true));
                }
                
                remaining--;
                
                // Wait for stagger delay before next
                if (i < duplicatesToAnimate - 1 || remaining > 0)
                {
                    yield return new WaitForSeconds(delayBetweenTweens);
                }
            }
            
            // Phase 2: Animate the actual visible packs (up to 3)
            for (int i = 0; i < visualCount && i < remaining; i++)
            {
                if (boosterImages[i] != null)
                {
                    // Stop hover animations first
                    Tween.Stop(boosterImages[i].GetInstanceID());
                    
                    // Tween the actual booster
                    StartCoroutine(TweenPackToBackpack(boosterImages[i], targetPosition, isDuplicate: false));
                }
                
                // Wait for stagger delay before next (except after last one)
                if (i < visualCount - 1 && i < remaining - 1)
                {
                    yield return new WaitForSeconds(delayBetweenTweens);
                }
            }
            
            // Wait for the last tween to complete
            yield return new WaitForSeconds(tweenDuration);
            
            // Grant all booster packs at once
            if (CardSystemManager.Instance != null)
            {
                CardSystemManager.Instance.AddBoosterPack(_totalPackCount);
                Logging.Debug($"[MinigameBoosterGiver] Granted {_totalPackCount} booster pack(s)!");
            }
            else
            {
                Logging.Warning("[MinigameBoosterGiver] CardSystemManager not found, cannot grant booster packs.");
            }

            // Hide scrapbook button by disposing the context
            hudContext?.Dispose();

            // Hide the visual container
            if (visualContainer != null)
            {
                visualContainer.SetActive(false);
            }
            
            // Show button again for next use
            if (continueButton != null)
            {
                continueButton.gameObject.SetActive(true);
            }

            // Invoke completion callback
            _onCompleteCallback?.Invoke();
            _onCompleteCallback = null;

            // Clear sequence reference
            _currentSequence = null;
        }
        
        /// <summary>
        /// Generic method to tween a booster pack to the backpack button.
        /// Handles both duplicates (instantiated clones) and actual booster visuals.
        /// </summary>
        private IEnumerator TweenPackToBackpack(RectTransform sourceRect, Vector3 targetPosition, bool isDuplicate)
        {
            RectTransform packToAnimate;
            
            if (isDuplicate)
            {
                // Create a clone at the source position
                GameObject clone = Instantiate(sourceRect.gameObject, sourceRect.parent);
                packToAnimate = clone.GetComponent<RectTransform>();
                
                if (packToAnimate != null)
                {
                    packToAnimate.localPosition = sourceRect.localPosition;
                    packToAnimate.localScale = sourceRect.localScale;
                    packToAnimate.gameObject.SetActive(true);
                }
            }
            else
            {
                packToAnimate = sourceRect;
            }
            
            if (packToAnimate == null)
            {
                yield break;
            }
            
            // Tween to target position
            Tween.LocalPosition(packToAnimate, targetPosition, tweenDuration, 0f, Tween.EaseInBack);
            
            // Scale down
            Vector3 targetScale = packToAnimate.localScale * disappearScale;
            Tween.LocalScale(packToAnimate, targetScale, tweenDuration, 0f, Tween.EaseInBack);
            
            // Don't wait here - let animations overlap
            // Hide/destroy the booster after tween completes (duplicate or not)
            // Since we destroy the entire UI instance anyway, just clean up visual artifacts
            yield return new WaitForSeconds(tweenDuration);
            
            if (packToAnimate != null)
            {
                packToAnimate.gameObject.SetActive(false);
            }
            
            yield break;
        }
        
        /// <summary>
        /// Get the target position for the booster pack animation (scrapbook button or fallback).
        /// </summary>
        private Vector3 GetTargetPosition(GameObject scrapbookButton)
        {
            if (scrapbookButton != null && boosterImages.Length > 0 && boosterImages[0] != null)
            {
                RectTransform scrapbookRect = scrapbookButton.GetComponent<RectTransform>();
                if (scrapbookRect != null)
                {
                    // Convert scrapbook button's world position to local position relative to booster's parent
                    Canvas canvas = GetComponentInParent<Canvas>();
                    if (canvas != null && canvas.renderMode == RenderMode.ScreenSpaceOverlay)
                    {
                        // For overlay canvas, convert screen position to local position
                        Vector2 screenPos = RectTransformUtility.WorldToScreenPoint(null, scrapbookRect.position);
                        RectTransformUtility.ScreenPointToLocalPointInRectangle(
                            boosterImages[0].parent as RectTransform, 
                            screenPos, 
                            null, 
                            out Vector2 localPoint);
                        return localPoint;
                    }
                    else
                    {
                        // For world space or camera canvas
                        return boosterImages[0].parent.InverseTransformPoint(scrapbookRect.position);
                    }
                }
            }
            
            // Fallback position
            return GetFallbackPosition();
        }

        private Vector3 GetFallbackPosition()
        {
            RectTransform canvasRect = GetComponentInParent<Canvas>()?.GetComponent<RectTransform>();
            if (canvasRect != null)
            {
                // Convert bottom-left corner with offset to local position
                Vector2 bottomLeft = new Vector2(-canvasRect.rect.width / 2f, -canvasRect.rect.height / 2f);
                return bottomLeft + targetBottomLeftOffset;
            }
            else
            {
                // Ultimate fallback if no canvas found
                if (boosterImages.Length > 0 && _boosterInitialPositions != null && _boosterInitialPositions.Length > 0)
                {
                    return _boosterInitialPositions[0] + new Vector3(-500f, -500f, 0f);
                }
                return new Vector3(-500f, -500f, 0f);
            }
        }
    }
}