using UnityEditor;
using UnityEngine;
using UnityEngine.SceneManagement;

namespace InTerra
{
	public class InTerra_UpdateAndCheckInEditor : UnityEditor.AssetModificationProcessor
	{
		[InitializeOnLoadMethod]
		static void InTerra_InitializeTerrainDataLoading()
		{
			if (!InTerra_Setting.DisableAllAutoUpdates) EditorApplication.update += EditorUpdate;
			Undo.undoRedoPerformed += UndoChecks;
			SceneManager.sceneLoaded += OnSceneLoaded;
			CheckTerrain();
		}

		static void EditorUpdate()
		{
			if (!EditorApplication.isPlaying || EditorApplication.isPaused)
			{
				InTerra_Data.CheckAndUpdate();
			}
		}

		static void UndoChecks()
		{
			if (!InTerra_Data.CheckDefinedKeywords()) InTerra_Data.WriteDefinedKeywords();
			InTerra_Data.TerrainMaterialUpdate();
			InTerra_TerrainShaderGUI.restrictInit = false;
		}

		static void OnSceneLoaded(Scene scene, LoadSceneMode mode)
		{
			CheckTerrain();
		}


		static void CheckTerrain()
		{
			foreach (var terrain in Terrain.activeTerrains)
			{
				if (InTerra_Data.CheckTerrainShader(terrain.materialTemplate) && terrain.materialTemplate.IsKeywordEnabled("_LAYERS_EIGHT"))
				{
					GameObject terGO = terrain.transform.root.gameObject;
					if (!terGO.TryGetComponent<InTerra_TerrainData>(out var td))
					{
						terGO.AddComponent<InTerra_TerrainData>();
					}
				}
			}
		}
	}
}