using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using UnityEngine;

namespace Wing.Utils
{
    public static class UnityExt
    {
        public static Mesh GetMesh(this GameObject go)
        {
            var filter = go.GetComponent<MeshFilter>();
            if (filter == null)
            {
                return null;
            }
            return filter.mesh;
        }

        public static void SetRectTransformSize(this RectTransform trans, Vector2 newSize)
        {
            Vector2 oldSize = trans.rect.size;
            Vector2 deltaSize = newSize - oldSize;
            trans.offsetMin = trans.offsetMin - new Vector2(deltaSize.x * trans.pivot.x, deltaSize.y * trans.pivot.y);
            trans.offsetMax = trans.offsetMax + new Vector2(deltaSize.x * (1f - trans.pivot.x), deltaSize.y * (1f - trans.pivot.y));
        }

        public static void SetLayerWithChildren(this GameObject go, string layer)
        {
            var lyr = LayerMask.NameToLayer(layer);
            go.layer = lyr;
            var children = go.transform.GetComponentsInChildren<Transform>();
            foreach(var c in children)
            {
                c.gameObject.layer = lyr;
            }
        }
    }
}