using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq.Expressions;
using TMPro;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.EventSystems;
using UnityEngine.UI;

namespace Beyond
{
    public class SkipButton : MonoBehaviour, IPointerDownHandler, IPointerUpHandler, IDragHandler
    {
        [SerializeField] private Image m_skipImage;
        [SerializeField] private TextMeshProUGUI m_description;
        [SerializeField] private TextMeshProUGUI m_Paused;
        [SerializeField] private AnimationCurve m_showCurve;
        [SerializeField] private bool m_onlySkip = true;
        private SkipCanvas m_skipCanvas;
        private bool m_isPaused = false;

        public float m_skipTime = 2f;
        public float m_quickTapTime = 0.1f;
        public float m_showTime = 3f;
        private float m_showTimer;

        private bool m_isTouching = false;

        private float m_timer = 0f;
        private int m_tapCounter = 0;

        // Nowe eventy
        public UnityEvent OnStartSkip;
        public UnityEvent OnEndSkip;

        void Awake()
        {
            m_skipCanvas = gameObject.FindComponentUpHierarchy<SkipCanvas>();
        }

        private void OnEnable()
        {
            m_timer = 0f;
            m_tapCounter = 0;
            m_isTouching = false;
            m_isPaused = false;
            m_Paused.gameObject.SetActive(false);
            m_skipImage.gameObject.SetActive(false);
            m_description.gameObject.SetActive(false);
        }

        private void Pause()
        {
            m_isPaused = !m_isPaused;
            m_Paused.gameObject.SetActive(m_isPaused);
            if (m_skipCanvas) m_skipCanvas.OnPause();
        }

        void Update()
        {
            if (m_isTouching)
            {
                if (!m_isPaused)
                {
                    if (m_timer > m_skipTime)
                    {
                        if (m_skipCanvas) m_skipCanvas.OnSkip();
                        OnEndSkip?.Invoke(); // Wywo�anie eventu ko�ca skipowania
                        m_isTouching = false;
                        m_timer = 0f;
                    }
                    if (m_timer > m_quickTapTime && !m_skipImage.gameObject.activeSelf)
                    {
                        ShowSkip();
                    }
                    m_skipImage.fillAmount = m_timer / m_skipTime;
                }

                m_timer += Time.deltaTime;
            }
            else if (!m_onlySkip)
            {
                if (m_timer > m_quickTapTime)
                {
                    if (m_tapCounter == 1)
                    {
                        Pause();
                    }
                    else if (m_tapCounter == 2)
                    {
                        if (m_skipCanvas) m_skipCanvas.OnRestart();
                    }

                    m_tapCounter = 0;
                }
                m_timer += Time.deltaTime;
            }
            UpdateShow();
        }

        private void UpdateShow()
        {
            if (m_description.gameObject.activeSelf)
            {
                if (m_showTimer < m_showTime)
                {
                    m_description.alpha = m_showCurve.Evaluate(m_showTimer / m_showTime);
                }
                else
                {
                    m_description.gameObject.SetActive(false);
                }
            }

            m_showTimer += Time.unscaledDeltaTime;
        }

        private void ShowDescription()
        {
            m_showTimer = 0f;
            m_description.gameObject.SetActive(true);
        }

        private void ShowSkip()
        {
            m_skipImage.gameObject.SetActive(true);
            m_skipImage.fillAmount = 0f;
            OnStartSkip?.Invoke(); // Wywo�anie eventu startu skipowania
        }

        public void OnPointerDown(PointerEventData eventData)
        {
            ShowDescription();
            m_isTouching = true;
            m_timer = 0f;
        }

        public void OnPointerUp(PointerEventData eventData)
        {
            if (m_timer < m_quickTapTime)
            {
                m_tapCounter++;
                m_timer = 0f;
            }

            if (m_skipImage)
            {
                m_skipImage.gameObject.SetActive(false);
                m_skipImage.fillAmount = 0f;
            }
            m_isTouching = false;
        }

        public void OnDrag(PointerEventData eventData)
        {
        }
    }
}