using System;
using UnityEngine;
using UnityEngine.Rendering;

namespace UnityEditor.TerrainTools
{
    [Serializable]
    internal class TerrainSettings : ScriptableObject
    {
        // Basic settings
        public int GroupingID = 0;
        public bool AutoConnect = true;
        public bool DrawHeightmap = true;
        public bool DrawInstanced = true;
        public float PixelError = 5;
        public float BaseMapDistance = 1000;
        public ShadowCastingMode ShadowCastingMode = ShadowCastingMode.TwoSided;
        public Material MaterialTemplate = null;
#if UNITY_2019_2_OR_NEWER
#else
		public Terrain.MaterialType MaterialType = Terrain.MaterialType.BuiltInStandard;
		public Color LegacySpecular = Color.gray;
		public float LegacyShininess = 0;
#endif
        public ReflectionProbeUsage ReflectionProbeUsage = ReflectionProbeUsage.BlendProbes;

        // Mesh resolution settings
        public float TerrainWidth = 500;
        public float TerrainHeight = 600;
        public float TerrainLength = 500;
        public int DetailResolutaion = 1024;
        public int DetailResolutionPerPatch = 32;

        // Texture resolution settings
        public int BaseTextureResolution = 1024;
        public int AlphaMapResolution = 512;
        public int HeightMapResolution = 513;

        // Tree and detail settings
        public bool DrawTreesAndFoliage = true;
        public bool BakeLightProbesForTrees = true;
        public bool DeringLightProbesForTrees = false;
        public bool PreserveTreePrototypeLayers = false;
        public float DetailObjectDistance = 80;
        public bool CollectDetailPatches = true;
        public float DetailObjectDensity = 1;
        public float TreeDistance = 2000;
        public float TreeBillboardDistance = 50;
        public float TreeCrossFadeLength = 5;
        public int TreeMaximumFullLODCount = 50;

        // Grass wind settings
        public float WavingGrassStrength = 0.5f;
        public float WavingGrassSpeed = 0.5f;
        public float WavingGrassAmount = 0.5f;
        public Color WavingGrassTint = new Color(0.7f, 0.6f, 0.5f, 0.0f);

        // UI
        public bool ShowBasicTerrainSettings = false;
        public bool ShowMeshResolutionSettings = false;
        public bool ShowTextureResolutionSettings = false;
        public bool ShowTreeAndDetailSettings = false;
        public bool ShowGrassWindSettings = false;
        public bool EnableBasicSettings = false;
        public bool EnableMeshResSettings = false;
        public bool EnableTextureResSettings = false;
        public bool EnableTreeSettings = false;
        public bool EnableWindSettings = false;

        public string PresetPath = string.Empty;
        public int PresetMode = 0;

        public void CopyUISettingsFrom(TerrainSettings other)
        {
            if (other == null)
            {
                return;
            }

            ShowBasicTerrainSettings = other.ShowBasicTerrainSettings;
            ShowMeshResolutionSettings = other.ShowMeshResolutionSettings;
            ShowTextureResolutionSettings = other.ShowTextureResolutionSettings;
            ShowTreeAndDetailSettings = other.ShowTreeAndDetailSettings;
            ShowGrassWindSettings = other.ShowGrassWindSettings;
            EnableBasicSettings = other.EnableBasicSettings;
            EnableMeshResSettings = other.EnableMeshResSettings;
            EnableTextureResSettings = other.EnableTextureResSettings;
            EnableTreeSettings = other.EnableTreeSettings;
            EnableWindSettings = other.EnableWindSettings;
        }

        public void CopySettingsFrom(TerrainSettings other)
        {
            if (other == null)
            {
                return;
            }

            GroupingID = other.GroupingID;
            AutoConnect = other.AutoConnect;
            DrawHeightmap = other.DrawHeightmap;
            DrawInstanced = other.DrawInstanced;
            PixelError = other.PixelError;
            BaseMapDistance = other.BaseMapDistance;
            ShadowCastingMode = other.ShadowCastingMode;
            MaterialTemplate = other.MaterialTemplate;
            ReflectionProbeUsage = other.ReflectionProbeUsage;
#if UNITY_2019_2_OR_NEWER
#else
			MaterialType = other.MaterialType;
			LegacySpecular = other.LegacySpecular;
			LegacyShininess = other.LegacyShininess;
#endif

            // mesh resolution
            TerrainWidth = other.TerrainWidth;
            TerrainHeight = other.TerrainHeight;
            TerrainLength = other.TerrainLength;
            DetailResolutaion = other.DetailResolutaion;
            DetailResolutionPerPatch = other.DetailResolutionPerPatch;

            // texture resolution
            BaseTextureResolution = other.BaseTextureResolution;
            AlphaMapResolution = other.AlphaMapResolution;
            HeightMapResolution = other.HeightMapResolution;

            // tree and details
            DrawTreesAndFoliage = other.DrawTreesAndFoliage;
            BakeLightProbesForTrees = other.BakeLightProbesForTrees;
            DeringLightProbesForTrees = other.DeringLightProbesForTrees;
            PreserveTreePrototypeLayers = other.PreserveTreePrototypeLayers;
            DetailObjectDistance = other.DetailObjectDistance;
            CollectDetailPatches = other.CollectDetailPatches;
            DetailObjectDensity = other.DetailObjectDensity;
            TreeDistance = other.TreeDistance;
            TreeBillboardDistance = other.TreeBillboardDistance;
            TreeCrossFadeLength = other.TreeCrossFadeLength;
            TreeMaximumFullLODCount = other.TreeMaximumFullLODCount;

            // grass wind
            WavingGrassStrength = other.WavingGrassStrength;
            WavingGrassSpeed = other.WavingGrassSpeed;
            WavingGrassAmount = other.WavingGrassAmount;
            WavingGrassTint = other.WavingGrassTint;
        }

        public void CopySettingsFrom(Terrain terrain)
        {
            if (terrain == null)
            {
                return;
            }

            // base settings
            GroupingID = terrain.groupingID;
            AutoConnect = terrain.allowAutoConnect;
            DrawHeightmap = terrain.drawHeightmap;
            DrawInstanced = terrain.drawInstanced;
            PixelError = terrain.heightmapPixelError;
            BaseMapDistance = terrain.basemapDistance;
            ShadowCastingMode = terrain.shadowCastingMode;
            MaterialTemplate = terrain.materialTemplate;
            ReflectionProbeUsage = terrain.reflectionProbeUsage;
#if UNITY_2019_2_OR_NEWER
#else
			MaterialType = terrain.materialType;
			LegacySpecular = terrain.legacySpecular;
			LegacyShininess = terrain.legacyShininess;
#endif

            // mesh resolution
            TerrainWidth = terrain.terrainData.size.x;
            TerrainHeight = terrain.terrainData.size.y;
            TerrainLength = terrain.terrainData.size.z;
            DetailResolutaion = terrain.terrainData.detailResolution;
            DetailResolutionPerPatch = terrain.terrainData.detailResolutionPerPatch;

            // texture resolution
            BaseTextureResolution = terrain.terrainData.baseMapResolution;
            AlphaMapResolution = terrain.terrainData.alphamapResolution;
            HeightMapResolution = terrain.terrainData.heightmapResolution;

            // tree and details
            DrawTreesAndFoliage = terrain.drawTreesAndFoliage;
            BakeLightProbesForTrees = terrain.bakeLightProbesForTrees;
            DeringLightProbesForTrees = terrain.deringLightProbesForTrees;
            PreserveTreePrototypeLayers = terrain.preserveTreePrototypeLayers;
            DetailObjectDistance = terrain.detailObjectDistance;
            CollectDetailPatches = terrain.collectDetailPatches;
            DetailObjectDensity = terrain.detailObjectDensity;
            TreeDistance = terrain.treeDistance;
            TreeBillboardDistance = terrain.treeBillboardDistance;
            TreeCrossFadeLength = terrain.treeCrossFadeLength;
            TreeMaximumFullLODCount = terrain.treeMaximumFullLODCount;

            // grass wind
            WavingGrassStrength = terrain.terrainData.wavingGrassStrength;
            WavingGrassSpeed = terrain.terrainData.wavingGrassSpeed;
            WavingGrassAmount = terrain.terrainData.wavingGrassAmount;
            WavingGrassTint = terrain.terrainData.wavingGrassTint;
        }
    }
}