using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using GISTech.GISTerrainLoader;
using UnityEngine;
using UnityEngine.UI;

public class BlendMultiLayers : MonoBehaviour
{
	public Dropdown UILayers;

	public Slider UIOpacitySlider;

	private string TerrainFilePath;

	private GISTerrainLoaderPrefs Prefs;

	private GISTerrainLoaderRuntimePrefs RuntimePrefs;

	private RuntimeTerrainGenerator RuntimeGenerator;

	private float Opacity;

	private float[,,] splat;

	public int areaOfEffectSize = 100;

	private void Start()
	{
		TerrainFilePath = Application.streamingAssetsPath + "/GIS Terrains/MultiTextures/TIFF.tif";
		RuntimeGenerator = GISTerrainLoaderMonoSingleton<RuntimeTerrainGenerator>.Get;
		RuntimePrefs = GISTerrainLoaderMonoSingleton<GISTerrainLoaderRuntimePrefs>.Get;
		Prefs = RuntimePrefs.Prefs;
		UILayers.onValueChanged.AddListener(OnUILayerValueChanged);
		SetUILayers();
		UIOpacitySlider.onValueChanged.AddListener(UIOpacitySliderValueChanged);
		StartCoroutine(GenerateTerrain(TerrainFilePath));
	}

	private IEnumerator GenerateTerrain(string TerrainPath)
	{
		if ((Application.platform == RuntimePlatform.WindowsEditor || Application.platform == RuntimePlatform.WindowsPlayer) && (string.IsNullOrEmpty(TerrainPath) || !File.Exists(TerrainPath)))
		{
			Debug.LogError("Terrain file null or not supported.. Try againe");
			yield break;
		}
		InitializingRuntimePrefs();
		StartCoroutine(RuntimeGenerator.StartGenerating(Prefs));
	}

	private void InitializingRuntimePrefs()
	{
		RuntimeGenerator.enabled = true;
		Prefs.TerrainFilePath = TerrainFilePath;
		Prefs.RemovePrvTerrain = OptionEnabDisab.Enable;
		Prefs.TerrainElevation = TerrainElevation.RealWorldElevation;
		Prefs.terrainDimensionMode = TerrainDimensionsMode.AutoDetection;
		Prefs.terrainScale = new Vector3(1f, 1f, 1f);
		Prefs.projectionMode = ProjectionMode.Geographic;
		Prefs.heightmapResolution = 257;
		Prefs.textureloadingMode = TexturesLoadingMode.AutoDetection;
		Prefs.textureMode = TextureMode.MultiLayers;
	}

	private void SetUILayers()
	{
		List<string> fullTextureFolders = GISTerrainLoaderTextureGenerator.GetFullTextureFolders(TerrainFilePath);
		List<Dropdown.OptionData> list = new List<Dropdown.OptionData>();
		if (fullTextureFolders.Count > 0)
		{
			for (int i = 0; i < fullTextureFolders.Count; i++)
			{
				list.Add(new Dropdown.OptionData("Layer_" + i));
			}
			UILayers.ClearOptions();
			UILayers.AddOptions(list);
		}
	}

	private void OnUILayerValueChanged(int value)
	{
		UIOpacitySlider.value = 0f;
		Prefs.TextureFolderIndex = value;
	}

	private void UIOpacitySliderValueChanged(float value)
	{
		Opacity = value;
		GISTerrainTile[,] terrains = RuntimeGenerator.GeneratedContainer.terrains;
		int upperBound = terrains.GetUpperBound(0);
		int upperBound2 = terrains.GetUpperBound(1);
		for (int i = terrains.GetLowerBound(0); i <= upperBound; i++)
		{
			for (int j = terrains.GetLowerBound(1); j <= upperBound2; j++)
			{
				Terrain terrain = terrains[i, j].terrain;
				GetTerrainCoordinates(terrain);
			}
		}
	}

	private void OnDisable()
	{
		UILayers.onValueChanged.RemoveListener(OnUILayerValueChanged);
		UIOpacitySlider.onValueChanged.RemoveListener(UIOpacitySliderValueChanged);
	}

	private void Update()
	{
		if (!Input.GetKeyDown(KeyCode.Space))
		{
			return;
		}
		GISTerrainTile[,] terrains = RuntimeGenerator.GeneratedContainer.terrains;
		int upperBound = terrains.GetUpperBound(0);
		int upperBound2 = terrains.GetUpperBound(1);
		for (int i = terrains.GetLowerBound(0); i <= upperBound; i++)
		{
			for (int j = terrains.GetLowerBound(1); j <= upperBound2; j++)
			{
				Terrain terrain = terrains[i, j].terrain;
				GetTerrainCoordinates(terrain);
			}
		}
	}

	private void GetTerrainCoordinates(Terrain targetTerrain)
	{
		splat = targetTerrain.terrainData.GetAlphamaps(0, 0, targetTerrain.terrainData.alphamapWidth, targetTerrain.terrainData.alphamapHeight);
		for (int i = 0; i < targetTerrain.terrainData.alphamapWidth; i++)
		{
			for (int j = 0; j < targetTerrain.terrainData.alphamapHeight; j++)
			{
				float[] array = new float[targetTerrain.terrainData.alphamapLayers];
				for (int k = 0; k < splat.GetLength(2); k++)
				{
					array[k] = splat[i, j, k];
				}
				array[Prefs.TextureFolderIndex] += Opacity * 2f;
				float num = array.Sum();
				for (int l = 0; l < array.Length; l++)
				{
					array[l] /= num;
					splat[i, j, l] = array[l];
				}
			}
		}
		targetTerrain.terrainData.SetAlphamaps(0, 0, splat);
		targetTerrain.Flush();
	}
}