using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;
using TMPro;
namespace RainbowArt.CleanFlatUI
{
    public class DropdownTransition : TMP_Dropdown
    {
        Animator animatorList; 
        Toggle[] toggleList;
        IEnumerator diableCoroutine;
        float disableTime = 0.4f;

        public new void Show()
        {
            Transform dropdownList = transform.Find("Dropdown List");
            if (dropdownList != null)
            {
                return;
            }
            base.Show();   
            Transform contentTransform = transform.Find("Dropdown List/Viewport/Content");
            toggleList = contentTransform.GetComponentsInChildren<Toggle>(false);
            for (int i = 0; i < toggleList.Length; i++)
            {
                Toggle item = toggleList[i];
                item.onValueChanged.RemoveAllListeners();
                item.onValueChanged.AddListener(x => OnSelectItemCustom(item));
            }

            if(animatorList == null)
            {
                Transform listTransform = transform.Find("Dropdown List");
                animatorList = listTransform.gameObject.GetComponent<Animator>();                
            } 
            PlayAnimation(true);
        }

        void OnSelectItemCustom(Toggle toggle)
        {
            if (!toggle.isOn)
                toggle.isOn = true;

            int selectedIndex = -1;
            Transform tr = toggle.transform;
            Transform parent = tr.parent;
            for (int i = 0; i < parent.childCount; i++)
            {
                if (parent.GetChild(i) == tr)
                {
                    selectedIndex = i - 1;
                    break;
                }
            }

            if (selectedIndex < 0)
                return;
            value = selectedIndex;
            Hide();
        }

        public new void Hide()
        {
            if(animatorList == null)
            {
                Transform listTransform = transform.Find("Dropdown List");
                animatorList = listTransform.gameObject.GetComponent<Animator>();                
            } 
            PlayAnimation(false);   
            HideDropdown();          
        }

        public void HideDropdown()
        {
            if(diableCoroutine != null)
            {
                StopCoroutine(diableCoroutine);
                diableCoroutine = null;
            }    
            diableCoroutine = DisableTransition();              
            StartCoroutine(diableCoroutine);    
        }

        IEnumerator DisableTransition()
        {
            yield return new WaitForSeconds(disableTime);
            base.Hide();                                          
        }  

        void PlayAnimation(bool bShow)
        {
            if(animatorList != null)
            {
                if(animatorList.enabled == false)
                {
                    animatorList.enabled = true;
                }
                if(bShow)
                {
                    animatorList.Play("In",0,0);  
                }
                else
                {
                    animatorList.Play("Out",0,0);  
                }
            }            
        }     

        public override void OnPointerClick(PointerEventData eventData)
        {
            Show();
        }

        public override void OnSubmit(BaseEventData eventData)
        {
            Show();
        }

        public override void OnCancel(BaseEventData eventData)
        {
            Hide();
        }
    }
}