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

namespace UI.CardSystem
{
    /// <summary>
    /// Singleton UI component for granting booster packs from minigames.
    /// Displays a booster pack with glow effect, waits for user to click continue,
    /// then animates the pack flying to bottom-left corner before granting the reward.
    /// </summary>
    public class MinigameBoosterGiver : MonoBehaviour
    {
        public static MinigameBoosterGiver Instance { get; private set; }

        [Header("Visual References")]
        [SerializeField] private GameObject visualContainer;
        [SerializeField] private RectTransform boosterImage;
        [SerializeField] private RectTransform glowImage;
        [SerializeField] private Button continueButton;

        [Header("Animation Settings")]
        [SerializeField] private float hoverAmount = 20f;
        [SerializeField] private float hoverDuration = 1.5f;
        [SerializeField] private float glowPulseMin = 0.9f;
        [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 disappearDuration = 0.8f;
        [SerializeField] private float disappearScale = 0.2f;

        private Vector3 _boosterInitialPosition;
        private Vector3 _boosterInitialScale;
        private Vector3 _glowInitialScale;
        private Coroutine _currentSequence;
        private Action _onCompleteCallback;

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

            Instance = this;

            // Cache initial values
            if (boosterImage != null)
            {
                _boosterInitialPosition = boosterImage.localPosition;
                _boosterInitialScale = boosterImage.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);
            }
        }

        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)
            {
                Debug.LogWarning("[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
            if (boosterImage != null)
            {
                boosterImage.localPosition = _boosterInitialPosition;
                boosterImage.localScale = _boosterInitialScale;
            }

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

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

            // Start idle hovering animation on booster (ping-pong)
            if (boosterImage != null)
            {
                Vector3 hoverTarget = _boosterInitialPosition + Vector3.up * hoverAmount;
                Tween.LocalPosition(boosterImage, hoverTarget, hoverDuration, 0f, Tween.EaseLinear, Tween.LoopType.PingPong);
            }

            // Start pulsing animation on 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 button to prevent double-clicks
            if (continueButton != null)
            {
                continueButton.interactable = false;
            }

            // Stop the ongoing animations by stopping all tweens on these objects
            if (boosterImage != null)
            {
                Tween.Stop(boosterImage.GetInstanceID());
            }

            if (glowImage != null)
            {
                Tween.Stop(glowImage.GetInstanceID());
                // Fade out the glow
                Tween.LocalScale(glowImage, Vector3.zero, disappearDuration * 0.5f, 0f, Tween.EaseInBack);
            }

            // Start disappear animation
            StartCoroutine(DisappearSequence());
        }

        private IEnumerator DisappearSequence()
        {
            if (boosterImage == null)
            {
                yield break;
            }

            // Calculate bottom-left corner position in local space
            RectTransform canvasRect = GetComponentInParent<Canvas>()?.GetComponent<RectTransform>();
            Vector3 targetPosition;

            if (canvasRect != null)
            {
                // Convert bottom-left corner with offset to local position
                Vector2 bottomLeft = new Vector2(-canvasRect.rect.width / 2f, -canvasRect.rect.height / 2f);
                targetPosition = bottomLeft + targetBottomLeftOffset;
            }
            else
            {
                // Fallback if no canvas found
                targetPosition = _boosterInitialPosition + new Vector3(-500f, -500f, 0f);
            }

            // Tween to bottom-left corner
            Tween.LocalPosition(boosterImage, targetPosition, disappearDuration, 0f, Tween.EaseInBack);

            // Scale down
            Vector3 targetScale = _boosterInitialScale * disappearScale;
            Tween.LocalScale(boosterImage, targetScale, disappearDuration, 0f, Tween.EaseInBack);

            // Wait for animation to complete
            yield return new WaitForSeconds(disappearDuration);

            // Grant the booster pack
            if (CardSystemManager.Instance != null)
            {
                CardSystemManager.Instance.AddBoosterPack(1);
                Debug.Log("[MinigameBoosterGiver] Booster pack granted!");
            }
            else
            {
                Debug.LogWarning("[MinigameBoosterGiver] CardSystemManager not found, cannot grant booster pack.");
            }

            // Hide the visual
            if (visualContainer != null)
            {
                visualContainer.SetActive(false);
            }

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

            // Clear sequence reference
            _currentSequence = null;
        }
    }
}