using System.Collections.Generic;
using UnityEngine;

[AddComponentMenu("Enviro/Seasons for Terrains")]
public class EnviroTerrainSeasons : MonoBehaviour
{
	public Terrain terrain;

	public bool ChangeGrass = true;

	public bool ChangeGrassDensity = true;

	public bool ChangeTextures = true;

	public List<int> textureChangeIds = new List<int>();

	public Texture2D SpringTexture;

	public Texture2D SpringNormal;

	public Texture2D SummerTexture;

	public Texture2D SummerNormal;

	public Texture2D AutumnTexture;

	public Texture2D AutumnNormal;

	public Texture2D WinterTexture;

	public Texture2D WinterNormal;

	public Color SpringGrassColor;

	public Color SummerGrassColor;

	public Color AutumnGrassColor;

	public Color WinterGrassColor;

	public float SpringGrassDensity = 0.7f;

	public float SummerGrassDensity = 1f;

	public float AutumnGrassDensity = 1f;

	public float WinterGrassDensity;

	public Vector2 tiling = new Vector2(10f, 10f);

	private SplatPrototype[] textureInSplats = new SplatPrototype[1];

	private SplatPrototype[] texturesIn;

	private void Start()
	{
		if (terrain == null)
		{
			terrain = GetComponent<Terrain>();
		}
		texturesIn = terrain.terrainData.splatPrototypes;
		UpdateSeason();
		EnviroSky.instance.OnSeasonChanged += delegate
		{
			UpdateSeason();
		};
	}

	private void OnEnable()
	{
		if (ChangeTextures)
		{
			if (SpringTexture == null)
			{
				Debug.LogError("Please assign a spring texture in Inspector!");
				base.enabled = false;
			}
			if (SummerTexture == null)
			{
				Debug.LogError("Please assign a summer texture in Inspector!");
				base.enabled = false;
			}
			if (AutumnTexture == null)
			{
				Debug.LogError("Please assign a autumn texture in Inspector!");
				base.enabled = false;
			}
			if (WinterTexture == null)
			{
				Debug.LogError("Please assign a winter texture in Inspector!");
				base.enabled = false;
			}
			if (textureChangeIds.Count < 1)
			{
				Debug.LogError("Please configure Texture ChangeSlot IDs!");
				base.enabled = false;
			}
		}
	}

	private void ChangeGrassColor(Color ChangeToColor)
	{
		terrain.terrainData.wavingGrassTint = ChangeToColor;
	}

	private void ChangeTexture(Texture2D inTexture, int id)
	{
		textureInSplats = texturesIn;
		textureInSplats[id].texture = inTexture;
		textureInSplats[id].tileSize = tiling;
		terrain.terrainData.splatPrototypes = textureInSplats;
		terrain.Flush();
	}

	private void ChangeTexture(Texture2D inTexture, Texture2D inNormal, int id)
	{
		textureInSplats = texturesIn;
		textureInSplats[id].texture = inTexture;
		textureInSplats[id].normalMap = inNormal;
		textureInSplats[id].tileSize = tiling;
		terrain.terrainData.splatPrototypes = textureInSplats;
		terrain.Flush();
	}

	private void UpdateSeason()
	{
		switch (EnviroSky.instance.Seasons.currentSeasons)
		{
		case SeasonVariables.Seasons.Spring:
		{
			for (int k = 0; k < textureChangeIds.Count; k++)
			{
				if (ChangeTextures)
				{
					ChangeTexture(SpringTexture, textureChangeIds[k]);
					if (SpringNormal != null)
					{
						ChangeTexture(SpringTexture, SpringNormal, textureChangeIds[k]);
					}
				}
			}
			if (ChangeGrass)
			{
				ChangeGrassColor(SpringGrassColor);
			}
			if (ChangeGrassDensity)
			{
				terrain.detailObjectDensity = SpringGrassDensity;
			}
			break;
		}
		case SeasonVariables.Seasons.Summer:
		{
			for (int l = 0; l < textureChangeIds.Count; l++)
			{
				if (ChangeTextures)
				{
					ChangeTexture(SummerTexture, textureChangeIds[l]);
					if (SummerNormal != null)
					{
						ChangeTexture(SummerTexture, SummerNormal, textureChangeIds[l]);
					}
				}
			}
			if (ChangeGrass)
			{
				ChangeGrassColor(SummerGrassColor);
			}
			if (ChangeGrassDensity)
			{
				terrain.detailObjectDensity = SummerGrassDensity;
			}
			break;
		}
		case SeasonVariables.Seasons.Autumn:
		{
			for (int j = 0; j < textureChangeIds.Count; j++)
			{
				if (ChangeTextures)
				{
					ChangeTexture(AutumnTexture, textureChangeIds[j]);
					if (AutumnNormal != null)
					{
						ChangeTexture(AutumnTexture, AutumnNormal, textureChangeIds[j]);
					}
				}
			}
			if (ChangeGrass)
			{
				ChangeGrassColor(AutumnGrassColor);
			}
			if (ChangeGrassDensity)
			{
				terrain.detailObjectDensity = AutumnGrassDensity;
			}
			break;
		}
		case SeasonVariables.Seasons.Winter:
		{
			for (int i = 0; i < textureChangeIds.Count; i++)
			{
				if (ChangeTextures)
				{
					ChangeTexture(WinterTexture, textureChangeIds[i]);
					if (WinterNormal != null)
					{
						ChangeTexture(WinterTexture, WinterNormal, textureChangeIds[i]);
					}
				}
			}
			if (ChangeGrass)
			{
				ChangeGrassColor(WinterGrassColor);
			}
			if (ChangeGrassDensity)
			{
				terrain.detailObjectDensity = WinterGrassDensity;
			}
			break;
		}
		}
	}
}