// ***********************************************************************
// Assembly         : Unity
// Author           : Kimch
// Created          : 
//
// Last Modified By : Kimch
// Last Modified On : 
// ***********************************************************************
// <copyright file= "KUISwitchGroup" company=""></copyright>
// <summary></summary>
// ***********************************************************************
using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;

[AddComponentMenu("UI/Custom/Switch Group", 32)]
[DisallowMultipleComponent]
public class KUISwitchGroup : UIBehaviour
{
    [SerializeField] private bool m_AllowSwitchOff = false;
    public bool allowSwitchOff { get { return m_AllowSwitchOff; } set { m_AllowSwitchOff = value; } }

    private List<KUISwitch> m_Switchs = new List<KUISwitch>();

    protected KUISwitchGroup()
    { }

    private void ValidateSwitchIsInGroup(KUISwitch uiSwitch)
    {
        if (uiSwitch == null || !m_Switchs.Contains(uiSwitch))
            throw new ArgumentException(string.Format("Switch {0} is not part of SwitchGroup {1}", new object[] { uiSwitch, this }));
    }

    public void NotifySwitchOn(KUISwitch Switch)
    {
        ValidateSwitchIsInGroup(Switch);

        // disable all Switchs in the group
        for (var i = 0; i < m_Switchs.Count; i++)
        {
            if (m_Switchs[i] == Switch)
                continue;

            m_Switchs[i].isOn = false;
        }
    }

    public void UnregisterSwitch(KUISwitch Switch)
    {
        if (m_Switchs.Contains(Switch))
        {
            m_Switchs.Remove(Switch);
            Switch.onValueChanged.RemoveAllListeners();
        }
    }

    public void RegisterSwitch(KUISwitch Switch)
    {
        if (!m_Switchs.Contains(Switch))
        {
            m_Switchs.Add(Switch);
            Switch.onValueChanged.AddListener((value) =>
                {
                    OnToggleValueChanged(Switch, value);
                });
        }
    }

    public bool AnySwitchsOn()
    {
        return m_Switchs.Find(x => x.isOn) != null;
    }

    public IEnumerable<KUISwitch> ActiveSwitchs()
    {
        return m_Switchs.FindAll(x => x.isOn);
    }

    public void SetAllSwitchsOff()
    {
        bool oldAllowSwitchOff = m_AllowSwitchOff;
        m_AllowSwitchOff = true;

        for (var i = 0; i < m_Switchs.Count; i++)
            m_Switchs[i].isOn = false;

        m_AllowSwitchOff = oldAllowSwitchOff;
    }

    public event System.Action<string> onSwitchSelect;

    private void OnToggleValueChanged(KUISwitch uiSwitch, bool value)
    {
        if (value && onSwitchSelect != null)
        {
            onSwitchSelect(uiSwitch.name);
        }
    }
}