/*
 * Copyright (c) UserJoy Technology
 * All Rights Reserved.
 */

using UnityEditor;
using UnityEngine;
using System.Reflection;

namespace Edit.Postprocessor {
    public sealed class TextureReviewer : AssetPostprocessor {
        #region AssetPostprocessor Hooks
        void OnPreprocessTexture() {
            // Unity Code Snippet: Getting the original size of a Texture2D
            // http://philippseifried.com/blog/2012/07/30/unity3d-code-original-texture-siz/

            var textureImporter = (TextureImporter) assetImporter;
            if (textureImporter != null) {
                var args = new object[2] { 0, 0 };
                MethodInfo mi = typeof(TextureImporter).GetMethod("GetWidthAndHeight", BindingFlags.NonPublic | BindingFlags.Instance);
                mi.Invoke(textureImporter, args);

                int width = (int) args[0];
                int height = (int) args[1];

                if (width > 2048 || height > 2048) {
                    Debug.LogError(string.Format("texture width or height must small than 4096, width:{0}, height:{1}", width, height));
                }
            }
        }
        #endregion
    }
}