using UnityEngine;

namespace Thousandto.Launcher.ExternalLibs
{
    public class RenderQueueAutomatic : MonoBehaviour
    {
        //UIPanel
        private UIPanel panelOwner;

        private void OnEnable()
        {
            panelOwner = GetUIPanelByParent(transform);

            if (panelOwner != null)
            {
                SetRenderQueue(panelOwner.startingRenderQueue + 1);
            }
        }

        //设置RenderQueue
        private void SetRenderQueue(int renderQueue)
        {
            var Renderers = GetComponentsInChildren<Renderer>();
            var count = Renderers.Length;
            if (count > 0)
            {
                for (int i = 0; i < count; i++)
                {
                    if(Renderers[i].sharedMaterial)
                        Renderers[i].sharedMaterial.renderQueue = renderQueue;
                }
            }
        }

        //获取UIPanel
        private UIPanel GetUIPanelByParent(Transform trans)
        {
            var uiPanel = trans.GetComponent<UIPanel>();

            if (uiPanel != null)
            {
                return uiPanel;
            }

            if (trans.parent != null)
            {
                return GetUIPanelByParent(trans.parent);
            }

            return null;
        }
    }
}