namespace Rokid.UXR.Interaction
{
    using System;
    using UnityEngine;

    /// <summary>
    /// By adding BeginStart and EndStart at the beginning and end of Start, MonoBehaviours with
    /// OnEnable and OnDisable logic can wrap their contents within a _started flag and effectively
    /// skip over logic in those methods until after Start has been invoked.
    ///
    /// To not bypass the Unity Lifecycle, the enabled property is used to disable the most derived
    /// MonoBehaviour, invoke Start up the hierarchy chain, and finally re-enable the MonoBehaviour.
    /// </summary>
    public static class MonoBehaviourStartExtensions
    {
        public static void BeginStart(this MonoBehaviour monoBehaviour, ref bool started,
                                      Action baseStart = null)
        {
            if (!started)
            {
                monoBehaviour.enabled = false;
                started = true;
                baseStart?.Invoke();
                started = false;
            }
            else
            {
                baseStart?.Invoke();
            }
        }

        public static void EndStart(this MonoBehaviour monoBehaviour, ref bool started)
        {
            if (!started)
            {
                started = true;
                monoBehaviour.enabled = true;
            }
        }
    }
}