using SC.XR.Unity.Module_Keyboard;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.EventSystems;

namespace SC.XR.Unity.Module_PlatformAccount
{
    [RequireComponent(typeof(UGUI_SCInputField))]
    [RequireComponent(typeof(EventTrigger))]
    public class SCInputFieldTrigger : MonoBehaviour
    {
        private UGUI_SCInputField _scInputField;

        private EventTrigger _eventTrigger;

        protected Dictionary<EventTriggerType, EventTrigger.Entry> entrys = new Dictionary<EventTriggerType, EventTrigger.Entry>();

        private bool _onSelect = false;

        private bool _onError = false;

        public UGUI_SCInputField UGUI_SCInputField
        {
            get
            {
                if (_scInputField == null)
                {
                    _scInputField = GetComponent<UGUI_SCInputField>();
                }
                return _scInputField;
            }
        }

        public EventTrigger EventTrigger
        {
            get
            {
                if (_eventTrigger == null)
                {
                    _eventTrigger = GetComponent<EventTrigger>();
                }
                return _eventTrigger;
            }
        }


        public bool OnError
        {
            get
            {
                return _onError;
            }
            set
            {
                _onError = value;
            }
        }

        [Header("Target Graphic Color")]
        public Color normalColor;
        public Color highlightedColor;
        public Color pressedColor;
        public Color selectedColor;
        public Color disabledColor;
        public Color valueChangedColor;
        public Color errorColor;

        [Space(2)]
        [Header("Placeholder Color")]
        public Color placeholder_normal_color;
        public Color placeholder_error_color;

        [Space(2)]
        [Header("Text Component Color")]
        public Color textComponent_normal_color;        
        public Color textComponent_error_color;

        private void OnEnable()
        {
            //RegisterTriggerEvents(OnDeselectEvent, EventTriggerType.Deselect);
            RegisterTriggerEvents(OnPointerDownEvent, EventTriggerType.PointerDown);
            RegisterTriggerEvents(OnPointerEnterEvent, EventTriggerType.PointerEnter);
            RegisterTriggerEvents(OnPointerExitEvent, EventTriggerType.PointerExit);
            GetComponent<UGUI_SCInputField>().onValueChanged.AddListener(OnValueChanged);
            GetComponent<UGUI_SCInputField>().onEndEdit.AddListener(OnEndEdit);
        }

        private void OnDisable()
        {
            //UnRegisterTriggerEvents(OnDeselectEvent, EventTriggerType.Deselect);
            UnRegisterTriggerEvents(OnPointerDownEvent, EventTriggerType.PointerDown);
            UnRegisterTriggerEvents(OnPointerEnterEvent, EventTriggerType.PointerEnter);
            UnRegisterTriggerEvents(OnPointerExitEvent, EventTriggerType.PointerExit);
            GetComponent<UGUI_SCInputField>().onValueChanged.RemoveListener(OnValueChanged);
            GetComponent<UGUI_SCInputField>().onEndEdit.RemoveListener(OnEndEdit);
        }

        //public void OnDeselectEvent(BaseEventData baseEventData)
        //{
        //    if (UGUI_SCInputField.scKeyboard != null) return;

        //    _onSelect = false;
        //    UGUI_SCInputField.targetGraphic.color = _onError ? errorColor : normalColor;            
        //}

        public void OnPointerDownEvent(BaseEventData baseEventData)
        {
            _onSelect = true;
            UGUI_SCInputField.targetGraphic.color = selectedColor;
        }

        public void OnPointerEnterEvent(BaseEventData baseEventData)
        {
            if (UGUI_SCInputField.scKeyboard != null) return;

            if (_onSelect) return;
            UGUI_SCInputField.targetGraphic.color = highlightedColor;
        }

        public void OnPointerExitEvent(BaseEventData baseEventData)
        {
            if (UGUI_SCInputField.scKeyboard != null) return;

            if (_onSelect) return;
            UGUI_SCInputField.targetGraphic.color = _onError ? errorColor : normalColor;            
        }

        public void OnValueChanged(string input)
        {
            if (input == "")
            {
                UGUI_SCInputField.targetGraphic.color = selectedColor;
            }
            else
            {
                UGUI_SCInputField.targetGraphic.color = valueChangedColor;
            }
        }

        public void OnEndEdit(string input)
        {
            _onSelect = false;
            if (input == "")
            {
                UGUI_SCInputField.targetGraphic.color = _onError ? errorColor : normalColor;
            }
            else
            {
                UGUI_SCInputField.targetGraphic.color = _onError ? errorColor : valueChangedColor;
            }            
        }

        public void OnInputError(bool value)
        {
            _onError = value;
            if(value) UGUI_SCInputField.targetGraphic.color = errorColor;
        }

        public void OnTextComponentNormal()
        {
            UGUI_SCInputField.textComponent.color = textComponent_normal_color;
        }

        public void OnPlaceholderNormal()
        {
            UGUI_SCInputField.placeholder.color = placeholder_normal_color;
        }

        public void OnTextComponentError()
        {
            UGUI_SCInputField.textComponent.color = textComponent_error_color;
        }

        public void OnPlaceholderError()
        {
            UGUI_SCInputField.placeholder.color = placeholder_error_color;
        }

        private void RegisterTriggerEvents(UnityAction<BaseEventData> unityAction, EventTriggerType eventTriggerType)
        {
            UnityAction<BaseEventData> action = new UnityAction<BaseEventData>(unityAction);
            EventTrigger.Entry entry;

            if (entrys.ContainsKey(eventTriggerType))
            {
                EventTrigger.triggers.Add(entrys[eventTriggerType]);
            }
            else
            {
                entry = new EventTrigger.Entry();
                entry.eventID = eventTriggerType;
                entry.callback.AddListener(action);
                entrys.Add(eventTriggerType, entry);
                EventTrigger.triggers.Add(entry);
            }
        }

        private void UnRegisterTriggerEvents(UnityAction<BaseEventData> unityAction, EventTriggerType eventTriggerType)
        {
            EventTrigger.triggers.Remove(entrys[eventTriggerType]);
        }

    }
}