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

public class ToggleButton : MonoBehaviour
{
    [SerializeField]
    Button m_Button;
    public Button button { get { return m_Button; } }

    [SerializeField]
    bool m_IsOn = false;
    public bool isOn {
        get { return m_IsOn; }
        set {
            if (m_IsOn != value)
            {
                m_IsOn = value;

                selected.SetActive(m_IsOn);
                if (group != null && m_IsOn)
                {
                    group.NotifyToggleOn(this);
                }

                if (onValueChange != null)
                {
                    onValueChange(m_IsOn);
                }
            }
        }
    }

    [SerializeField]
    Image m_Selected;
    public Image selected { get { return m_Selected; } }

    [SerializeField]
    ToggleButtonGroup m_Group;
    public ToggleButtonGroup group {
        get { return m_Group; }
        set {
            if (m_Group != null)
            {
                m_Group.UnRegister(this);
            }
            m_Group = value;
            if (m_Group != null)
            {
                m_Group.Register(this);
            }
        }
    }

    UnityAction<bool> onValueChange;

    private void OnEnable()
    {
        selected.SetActive(m_IsOn);
        if (group != null)
        {
            group.Register(this);
            if (m_IsOn)
            {
                group.NotifyToggleOn(this);
            }
        }
    }

    private void OnDisable()
    {
        if (group != null)
        {
            group.UnRegister(this);
        }
    }

    public void SetListener(UnityAction action )
    {
        if (button != null)
        {
            button.SetListener(action);
        }
    }

    public void AddListener(UnityAction _action)
    {
        if (button != null)
        {
            button.AddListener(_action);
        }
    }

    public void RemoveListener()
    {
        if (button != null)
        {
            button.RemoveAllListeners();
        }
    }

    public void OnValueChange(UnityAction<bool> _action)
    {
        onValueChange = _action;
    }

    public void RemoveOnValueChange()
    {
        onValueChange = null;
    }

    private void OnValidate()
    {
#if UNITY_EDITOR
        if (selected != null)
        {
            selected.SetActive(isOn);
        }

        if (group != null)
        {
            group.NotifyToggleOn(this);
        }
#endif
    }
}