using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

namespace SC.XR.Unity.Module_Keyboard
{
    public class Custom_SCInputField : Selectable
    {
        public Text text;
        public Vector3 m_Position;
        public Vector3 m_Rotation;
        public Vector3 m_Scale;

        protected SCKeyboard m_Keyboard;

        private bool shouldDeactivateOnDeselect
        {
            get
            {
                //TODO
                return (m_Keyboard == null || m_Keyboard.status > 0)
                    && EventSystem.current.currentSelectedGameObject != this.gameObject;
            }
        }

        private bool m_ShouldDeactivateNextUpdate = false;

        private void LateUpdate()
        {
            #region SCKeyboard		
            if (m_Keyboard != null && m_Keyboard.status > 0 && EventSystem.current.currentSelectedGameObject != this.gameObject)
            {
                this.m_ShouldDeactivateNextUpdate = true;
            }

            bool shouldDeactivateNextUpdate = this.m_ShouldDeactivateNextUpdate;
            if (shouldDeactivateNextUpdate)
            {
                OnDeselect(null);
                this.m_ShouldDeactivateNextUpdate = false;
            }
            #endregion
        }

        public override void OnDeselect(BaseEventData eventData)
        {
            if (shouldDeactivateOnDeselect)
            {
                //this.DeactivateInputField();
                base.OnDeselect(eventData);
                SCKeyboard.Close(SCKeyboardEnum.SCKeyboard2D);
                m_Keyboard = null;
            }
        }

        public override void OnSelect(BaseEventData eventData)
        {
            base.OnSelect(eventData);
            m_Keyboard = SCKeyboard.Open(SCKeyboardEnum.SCKeyboard2D, "", SCKeyboardType.Default, m_Position, Quaternion.Euler(m_Rotation), m_Scale);
            m_Keyboard.transform.SetParent(transform);
            SetKeyboardRegistEvents(m_Keyboard);
        }

        private void SetKeyboardRegistEvents(SCKeyboard scKeyboard)
        {
            scKeyboard.ClearOnKeyClickEvent();
            scKeyboard.ClearOnSpecialKeyClickEvent(SpecialKeyEnum.Delete);
            scKeyboard.RegisterOnKeyClickEvent((str) => { text.text += str; });
            scKeyboard.RegisterOnSpecialKeyClickEvent(SpecialKeyEnum.Delete, ()=> {
                if (text.text.Length == 0)
                {
                    return;
                }
                text.text = text.text.Substring(0, text.text.Length - 1); 
            });
        }

    }
}