#if UNITY_EDITOR
using System.Collections.Generic;
using System.IO;
using UnityEditor;
using UnityEngine;

/// <summary>
/// LmHouses 十二栋：XPbr Prefab，按高度缩放到场景可用尺寸。原点已在底面，不做 +90X。
/// unity command run_script --file AgentScripts/SetupLmHouses.cs --entry SetupLmHouses.Run
/// </summary>
public static class SetupLmHouses
{
    const string Root = "Assets/Bundles/Scenes/Test/LmHouses";
    const string XPbrShaderName = "Test/XPbr";

    static readonly (string name, float height)[] Houses =
    {
        ("cream_tile", 7.0f),
        ("cream_red", 7.2f),
        ("white_balcony", 7.0f),
        ("brown_wood", 6.8f),
        ("cream_porch", 7.2f),
        ("stone_balcony", 7.0f),
        ("thatched", 4.4f),
        ("white_blue", 7.0f),
        ("wood_fence", 6.6f),
        ("shop_awning", 7.0f),
        ("picket", 6.8f),
        ("gate", 7.0f),
    };

    public static string Run()
    {
        AssetDatabase.Refresh();
        var reports = new List<string>();
        foreach (var (name, height) in Houses)
            reports.Add(EnsurePrefab(name, height));
        AssetDatabase.SaveAssets();
        AssetDatabase.Refresh();
        return string.Join(" | ", reports);
    }

    static string EnsurePrefab(string name, float height)
    {
        var dir = $"{Root}/{name}";
        var fbxPath = $"{dir}/{name}.fbx";
        var basePath = $"{dir}/{name}_base.png";
        var mixPath = $"{dir}/{name}_mix.png";
        var matPath = $"{dir}/{name}.mat";
        var prefabPath = $"{dir}/{name}.prefab";
        if (!File.Exists(fbxPath))
            return name + ":missing";

        ConfigureTexture(basePath, srgb: true);
        ConfigureTexture(mixPath, srgb: false);

        var model = AssetImporter.GetAtPath(fbxPath) as ModelImporter;
        if (model != null)
        {
            model.globalScale = 1f;
            model.useFileScale = false;
            model.bakeAxisConversion = true;
            model.materialImportMode = File.Exists(matPath)
                ? ModelImporterMaterialImportMode.ImportViaMaterialDescription
                : ModelImporterMaterialImportMode.None;
            model.meshCompression = ModelImporterMeshCompression.Medium;
            model.isReadable = false;
            model.SaveAndReimport();
        }

        var baseMap = AssetDatabase.LoadAssetAtPath<Texture2D>(basePath);
        var mixMap = AssetDatabase.LoadAssetAtPath<Texture2D>(mixPath);
        var xpbr = Shader.Find(XPbrShaderName);
        var urpLit = Shader.Find("Universal Render Pipeline/Lit") ?? Shader.Find("Standard");
        var useXpbr = xpbr != null && baseMap != null && mixMap != null;
        var shader = useXpbr ? xpbr : urpLit;
        var mat = AssetDatabase.LoadAssetAtPath<Material>(matPath);
        if (mat == null)
        {
            mat = new Material(shader);
            AssetDatabase.CreateAsset(mat, matPath);
        }
        else
        {
            mat.shader = shader;
        }

        if (useXpbr)
        {
            if (mat.HasProperty("_MainTex")) mat.SetTexture("_MainTex", baseMap);
            if (mat.HasProperty("_MixTex")) mat.SetTexture("_MixTex", mixMap);
            if (mat.HasProperty("_BaseColor")) mat.SetColor("_BaseColor", Color.white);
            if (mat.HasProperty("_Metallic")) mat.SetFloat("_Metallic", 1f);
            if (mat.HasProperty("_Roughness")) mat.SetFloat("_Roughness", 1f);
            if (mat.HasProperty("_AO")) mat.SetFloat("_AO", 1f);
        }
        else if (baseMap != null && mat.HasProperty("_BaseMap"))
        {
            mat.SetTexture("_BaseMap", baseMap);
        }
        EditorUtility.SetDirty(mat);

        var modelRoot = AssetDatabase.LoadAssetAtPath<GameObject>(fbxPath);
        if (modelRoot == null)
            return name + ":fbx-not-loaded";

        var instance = (GameObject)PrefabUtility.InstantiatePrefab(modelRoot);
        instance.name = name;
        foreach (var renderer in instance.GetComponentsInChildren<Renderer>())
            renderer.sharedMaterial = mat;
        instance.transform.localPosition = Vector3.zero;
        instance.transform.localRotation = Quaternion.identity;
        instance.transform.localScale = Vector3.one;
        var bounds = default(Bounds);
        var has = false;
        foreach (var renderer in instance.GetComponentsInChildren<Renderer>())
        {
            if (!has) { bounds = renderer.bounds; has = true; }
            else bounds.Encapsulate(renderer.bounds);
        }
        if (has && bounds.size.y > 0.01f)
            instance.transform.localScale = Vector3.one * (height / bounds.size.y);
        PrefabUtility.SaveAsPrefabAsset(instance, prefabPath);
        Object.DestroyImmediate(instance);
        return name + "=" + height.ToString("0.0");
    }

    static void ConfigureTexture(string path, bool srgb)
    {
        if (!File.Exists(path)) return;
        var importer = AssetImporter.GetAtPath(path) as TextureImporter;
        if (importer == null) return;
        importer.textureType = TextureImporterType.Default;
        importer.sRGBTexture = srgb;
        importer.mipmapEnabled = true;
        importer.alphaIsTransparency = srgb;
        importer.SaveAndReimport();
    }
}
#endif