// WL-816a 캡처 — ⓐ원본 ⓑ통일 ⓒ좌우 ⓓ데모와 나란히 ⓔ텍스처 vs 단색 + 수치
// 전부 에디트 모드 오프스크린 렌더(UI 캔버스가 안 끼어든다) · 씬은 저장하지 않는다.
public static class WL816a_Cap
{
    const string Dir = "Screenshots_WL/WL816a/";
    const string Farm = "Assets/WL/Look/Farm/Scenes/WL_FarmLook.unity";
    const string Orig = "Assets/FarmingIsland/Scenes/Level01.unity";
    const string Demo = "Assets/3DPixelArtEnvironment/Demo/Demo.unity";
    const int W = 1080, H = 1920;

    public static void Run()
    {
        var sb = new System.Text.StringBuilder();

        // ── ⓐ 원본 Level01 (저장 안 함) ──────────────────────────────────
        UnityEditor.SceneManagement.EditorSceneManager.OpenScene(Orig, UnityEditor.SceneManagement.OpenSceneMode.Single);
        Shot(FindCam("MainCamera"), Dir + "a_orig_level01.png");
        Shot(DemoAngleCam(), Dir + "a_orig_demoangle.png");
        Stats("원본 Level01", sb);

        // ── ⓑ 통일본(텍스처 유지) ────────────────────────────────────────
        UnityEditor.SceneManagement.EditorSceneManager.OpenScene(Farm, UnityEditor.SceneManagement.OpenSceneMode.Single);
        Shot(FindCam("MainCamera"), Dir + "b_unified_tex.png");
        Shot(DemoAngleCam(), Dir + "b_unified_tex_demoangle.png");
        Stats("통일본(텍스처 유지)", sb);

        // ── ⓔ 단색안 ─────────────────────────────────────────────────────
        var comp = UnityEngine.Object.FindFirstObjectByType<WL.Look.Farm.WLFarmLook>(UnityEngine.FindObjectsInactive.Include);
        if (comp != null) comp.Apply(2, 1);
        Shot(FindCam("MainCamera"), Dir + "e_unified_flat.png");
        Shot(DemoAngleCam(), Dir + "e_unified_flat_demoangle.png");
        Stats("통일본(단색)", sb);

        // ── 되돌리기 검증: enabled_=0 (원본 머티리얼 + 원본 조명) ─────────
        UnityEditor.SceneManagement.EditorSceneManager.OpenScene(Farm, UnityEditor.SceneManagement.OpenSceneMode.Single);
        comp = UnityEngine.Object.FindFirstObjectByType<WL.Look.Farm.WLFarmLook>(UnityEngine.FindObjectsInactive.Include);
        if (comp != null) comp.Apply(0, 0);
        Shot(FindCam("MainCamera"), Dir + "z_rollback_off.png");
        Stats("되돌리기(enabled_=0)", sb);

        // 씬을 디스크에서 다시 읽어 변경을 버린다(저장 금지)
        UnityEditor.SceneManagement.EditorSceneManager.OpenScene(Farm, UnityEditor.SceneManagement.OpenSceneMode.Single);

        // ── 데모 ─────────────────────────────────────────────────────────
        UnityEditor.SceneManagement.EditorSceneManager.OpenScene(Demo, UnityEditor.SceneManagement.OpenSceneMode.Single);
        Shot(FindCam("Main Camera"), Dir + "x_demo.png");
        Stats("데모 Demo.unity", sb);

        // ── 합성 ─────────────────────────────────────────────────────────
        Side(Dir + "c_side_by_side.png", Dir + "a_orig_level01.png", Dir + "b_unified_tex.png");
        Side(Dir + "d_demo_vs_unified.png", Dir + "x_demo.png", Dir + "b_unified_tex_demoangle.png");
        Side(Dir + "e_tex_vs_flat.png", Dir + "b_unified_tex.png", Dir + "e_unified_flat.png");
        Side(Dir + "z_rollback_vs_orig.png", Dir + "a_orig_level01.png", Dir + "z_rollback_off.png");

        // ── 화면 고유색 수 ───────────────────────────────────────────────
        sb.AppendLine("── 화면 고유색 수(1080x1920 · RGB24) ──");
        string[] files = { "a_orig_level01.png", "b_unified_tex.png", "e_unified_flat.png", "x_demo.png",
                           "a_orig_demoangle.png", "b_unified_tex_demoangle.png", "z_rollback_off.png" };
        for (int i = 0; i < files.Length; i++)
            sb.AppendLine(string.Format("   {0,-32} {1,8:N0}", files[i], UniqueColors(Dir + files[i])));
        UnityEngine.Debug.Log("[WL816a Cap]\n" + sb.ToString());
    }

    // ── 데모와 같은 카메라 설정(직교 10 · euler 30,60,0)로 섬 중앙을 본다 ──
    static UnityEngine.Camera DemoAngleCam()
    {
        var go = UnityEngine.GameObject.Find("__WL816aDemoAngle");
        if (go == null) { go = new UnityEngine.GameObject("__WL816aDemoAngle"); go.hideFlags = UnityEngine.HideFlags.DontSave; }
        var c = go.GetComponent<UnityEngine.Camera>();
        if (c == null) c = go.AddComponent<UnityEngine.Camera>();
        c.orthographic = true; c.orthographicSize = 10f;
        c.nearClipPlane = 0.3f; c.farClipPlane = 500f;
        c.clearFlags = UnityEngine.CameraClearFlags.Skybox;
        c.backgroundColor = new UnityEngine.Color(0.192f, 0.302f, 0.475f, 0f);
        var rot = UnityEngine.Quaternion.Euler(30f, 60f, 0f);
        go.transform.rotation = rot;
        go.transform.position = new UnityEngine.Vector3(0f, 0.6f, 0f) - rot * UnityEngine.Vector3.forward * 60f;
        if (go.GetComponent<UnityEngine.Rendering.Universal.UniversalAdditionalCameraData>() == null)
            go.AddComponent<UnityEngine.Rendering.Universal.UniversalAdditionalCameraData>();
        return c;
    }

    static UnityEngine.Camera FindCam(string name)
    {
        var cams = UnityEngine.Object.FindObjectsByType<UnityEngine.Camera>(
            UnityEngine.FindObjectsInactive.Exclude, UnityEngine.FindObjectsSortMode.None);
        for (int i = 0; i < cams.Length; i++) if (cams[i].name == name) return cams[i];
        return cams.Length > 0 ? cams[0] : null;
    }

    static void Shot(UnityEngine.Camera cam, string path)
    {
        if (cam == null) { UnityEngine.Debug.Log("[WL816a] 카메라 없음 " + path); return; }
        var rt = new UnityEngine.RenderTexture(W, H, 24, UnityEngine.RenderTextureFormat.ARGB32, UnityEngine.RenderTextureReadWrite.sRGB);
        rt.antiAliasing = 1;
        var pT = cam.targetTexture; var pA = UnityEngine.RenderTexture.active;
        cam.targetTexture = rt; cam.Render();
        UnityEngine.RenderTexture.active = rt;
        var tex = new UnityEngine.Texture2D(W, H, UnityEngine.TextureFormat.RGB24, false);
        tex.ReadPixels(new UnityEngine.Rect(0, 0, W, H), 0, 0); tex.Apply();
        UnityEngine.RenderTexture.active = pA; cam.targetTexture = pT;
        var dir = System.IO.Path.GetDirectoryName(path);
        if (!System.IO.Directory.Exists(dir)) System.IO.Directory.CreateDirectory(dir);
        System.IO.File.WriteAllBytes(path, UnityEngine.ImageConversion.EncodeToPNG(tex));
        UnityEngine.Object.DestroyImmediate(tex); UnityEngine.Object.DestroyImmediate(rt);
    }

    static UnityEngine.Texture2D Load(string path)
    {
        if (!System.IO.File.Exists(path)) return null;
        var t = new UnityEngine.Texture2D(2, 2, UnityEngine.TextureFormat.RGB24, false, false);
        return UnityEngine.ImageConversion.LoadImage(t, System.IO.File.ReadAllBytes(path)) ? t : null;
    }

    static void Side(string outPath, string leftPath, string rightPath)
    {
        var a = Load(leftPath); var b = Load(rightPath);
        if (a == null || b == null) { UnityEngine.Debug.Log("[WL816a] 합성 실패 " + outPath); return; }
        int w = a.width + b.width, h = UnityEngine.Mathf.Max(a.height, b.height);
        var o = new UnityEngine.Texture2D(w, h, UnityEngine.TextureFormat.RGB24, false);
        var px = new UnityEngine.Color32[w * h];
        for (int i = 0; i < px.Length; i++) px[i] = new UnityEngine.Color32(20, 20, 20, 255);
        o.SetPixels32(px);
        o.SetPixels(0, 0, a.width, a.height, a.GetPixels());
        o.SetPixels(a.width, 0, b.width, b.height, b.GetPixels());
        o.Apply();
        System.IO.File.WriteAllBytes(outPath, UnityEngine.ImageConversion.EncodeToPNG(o));
        UnityEngine.Object.DestroyImmediate(a); UnityEngine.Object.DestroyImmediate(b); UnityEngine.Object.DestroyImmediate(o);
    }

    static int UniqueColors(string path)
    {
        var t = Load(path);
        if (t == null) return -1;
        var px = t.GetPixels32();
        var set = new System.Collections.Generic.HashSet<int>();
        for (int i = 0; i < px.Length; i++) set.Add((px[i].r << 16) | (px[i].g << 8) | px[i].b);
        UnityEngine.Object.DestroyImmediate(t);
        return set.Count;
    }

    static void Stats(string label, System.Text.StringBuilder sb)
    {
        var rends = UnityEngine.Object.FindObjectsByType<UnityEngine.Renderer>(
            UnityEngine.FindObjectsInactive.Exclude, UnityEngine.FindObjectsSortMode.None);
        var mats = new System.Collections.Generic.HashSet<UnityEngine.Material>();
        var shaders = new System.Collections.Generic.Dictionary<string, int>();
        long tris = 0; int slots = 0; int texMats = 0;
        for (int i = 0; i < rends.Length; i++)
        {
            var r = rends[i];
            if (r is UnityEngine.ParticleSystemRenderer) continue;
            UnityEngine.Mesh mesh = null;
            var mf = r.GetComponent<UnityEngine.MeshFilter>(); if (mf != null) mesh = mf.sharedMesh;
            var sk = r as UnityEngine.SkinnedMeshRenderer; if (sk != null) mesh = sk.sharedMesh;
            if (mesh != null) for (int s = 0; s < mesh.subMeshCount; s++) tris += mesh.GetIndexCount(s) / 3;
            var ms = r.sharedMaterials;
            for (int m = 0; m < ms.Length; m++)
            {
                if (ms[m] == null) continue;
                slots++; mats.Add(ms[m]);
                string sn = ms[m].shader != null ? ms[m].shader.name : "?";
                int c; shaders.TryGetValue(sn, out c); shaders[sn] = c + 1;
            }
        }
        foreach (var m in mats)
            if ((m.HasProperty("_BaseMap") && m.GetTexture("_BaseMap") != null) ||
                (m.HasProperty("_MainTex") && m.GetTexture("_MainTex") != null)) texMats++;
        var shs = new System.Text.StringBuilder();
        foreach (var kv in shaders) shs.Append(kv.Key + " x" + kv.Value + " · ");
        sb.AppendLine(string.Format("[{0}] 렌더러 {1} · 슬롯 {2} · 고유 머티리얼 {3}(텍스처 사용 {4}) · 삼각형 {5:N0}",
            label, rends.Length, slots, mats.Count, texMats, tris));
        sb.AppendLine("     셰이더: " + shs.ToString());
        sb.AppendLine(string.Format("     ambient={0} {1} · skybox={2} · 라이트 {3}",
            UnityEngine.RenderSettings.ambientMode, UnityEngine.RenderSettings.ambientSkyColor,
            UnityEngine.RenderSettings.skybox != null ? UnityEngine.RenderSettings.skybox.name : "없음",
            UnityEngine.Object.FindObjectsByType<UnityEngine.Light>(UnityEngine.FindObjectsInactive.Exclude, UnityEngine.FindObjectsSortMode.None).Length));
    }
}