using System;
using System.Collections;
using TMPro;
using UnityEngine;
using UnityEngine.UI;

namespace Levels
{
    /// <summary>
    /// UI overlay for confirming a level switch. Displays level info and handles confirm/cancel actions, and supports scrolling between level info and leaderboard.
    /// </summary>
    public class MinigameSwitchMenu : MonoBehaviour
    {
        [Header("UI References")]
        public Image iconImage;
        public TMP_Text levelNameText;
        public Button confirmButton;
        public Button cancelButton;
        public Button toLeaderboardButton;
        public Button toLevelSelectButton;
        public ScrollRect scrollView;
        public float scrollDuration = 1f;

        private Action _onLevelConfirm;
        private Action _onCancel;
        private LevelSwitchData _switchData;
        private Coroutine _activeScrollCoroutine;

        /// <summary>
        /// Initialize the menu with data and callbacks.
        /// </summary>
        public void Setup(LevelSwitchData switchData, Action onLevelConfirm, Action onCancel)
        {
            _switchData = switchData;
            _onLevelConfirm = onLevelConfirm;
            _onCancel = onCancel;
            if (iconImage) iconImage.sprite = switchData?.menuSprite ?? switchData?.mapSprite;
            if (levelNameText) levelNameText.text = switchData?.targetLevelSceneName ?? "";
            if (confirmButton) confirmButton.onClick.AddListener(OnConfirmClicked);
            if (cancelButton) cancelButton.onClick.AddListener(OnCancelClicked);
            if (toLeaderboardButton) toLeaderboardButton.onClick.AddListener(OnToLeaderboardClicked);
            if (toLevelSelectButton) toLevelSelectButton.onClick.AddListener(OnToLevelSelectClicked);
            // Show only the toLeaderboardButton at start
            if (toLeaderboardButton) toLeaderboardButton.gameObject.SetActive(true);
            if (toLevelSelectButton) toLevelSelectButton.gameObject.SetActive(false);
            // Initialize scroll view to start at left (level info view)
            if (scrollView) scrollView.horizontalNormalizedPosition = 0f;
        }

        private void OnDestroy()
        {
            if (confirmButton) confirmButton.onClick.RemoveListener(OnConfirmClicked);
            if (cancelButton) cancelButton.onClick.RemoveListener(OnCancelClicked);
            if (toLeaderboardButton) toLeaderboardButton.onClick.RemoveListener(OnToLeaderboardClicked);
            if (toLevelSelectButton) toLevelSelectButton.onClick.RemoveListener(OnToLevelSelectClicked);
            if (_activeScrollCoroutine != null)
            {
                StopCoroutine(_activeScrollCoroutine);
                _activeScrollCoroutine = null;
            }
        }

        private void OnConfirmClicked()
        {
            _onLevelConfirm?.Invoke();
            Destroy(gameObject);
        }

        private void OnCancelClicked()
        {
            _onCancel?.Invoke();
            Destroy(gameObject);
        }

        private void OnToLeaderboardClicked()
        {
            if (_activeScrollCoroutine != null)
            {
                StopCoroutine(_activeScrollCoroutine);
            }
            _activeScrollCoroutine = StartCoroutine(ScrollToLeaderboardCoroutine());
        }

        private void OnToLevelSelectClicked()
        {
            if (_activeScrollCoroutine != null)
            {
                StopCoroutine(_activeScrollCoroutine);
            }
            _activeScrollCoroutine = StartCoroutine(ScrollToLevelSelectCoroutine());
        }

        private IEnumerator ScrollToLeaderboardCoroutine()
        {
            if (toLeaderboardButton) toLeaderboardButton.gameObject.SetActive(false);
            float elapsed = 0f;
            float startPos = scrollView.horizontalNormalizedPosition;
            float targetPos = 0.95f;
            while (elapsed < scrollDuration)
            {
                elapsed += Time.deltaTime;
                float t = Mathf.Clamp01(elapsed / scrollDuration);
                float smoothT = Mathf.SmoothStep(0f, 1f, t);
                scrollView.horizontalNormalizedPosition = Mathf.Lerp(startPos, targetPos, smoothT);
                yield return null;
            }
            scrollView.horizontalNormalizedPosition = targetPos;
            if (toLevelSelectButton) toLevelSelectButton.gameObject.SetActive(true);
            _activeScrollCoroutine = null;
        }

        private IEnumerator ScrollToLevelSelectCoroutine()
        {
            if (toLevelSelectButton) toLevelSelectButton.gameObject.SetActive(false);
            float elapsed = 0f;
            float startPos = scrollView.horizontalNormalizedPosition;
            float targetPos = 0f;
            while (elapsed < scrollDuration)
            {
                elapsed += Time.deltaTime;
                float t = Mathf.Clamp01(elapsed / scrollDuration);
                float smoothT = Mathf.SmoothStep(0f, 1f, t);
                scrollView.horizontalNormalizedPosition = Mathf.Lerp(startPos, targetPos, smoothT);
                yield return null;
            }
            scrollView.horizontalNormalizedPosition = targetPos;
            if (toLeaderboardButton) toLeaderboardButton.gameObject.SetActive(true);
            _activeScrollCoroutine = null;
        }
    }
}