// WL-816k — ② 데모 물 셰이더를 섬에 씌워 본다 (PD 구도 · 거리 15 m)
//   실측 목표: ⓐ 깨지는가 ⓑ 무늬 크기가 UV 기반인가(평면 100배) ⓒ 섬과 만나는 선에 거품이 생기는가
//   🔴 Play 중 에셋 수정 0 — 전부 런타임 Material 복사본.
using System.Collections;
using System.Text;
using UnityEngine;
using UnityEngine.Rendering.Universal;
using UnityEngine.SceneManagement;
using WL.Look.Farm;

public static class WL816k_Probe
{
    public const string D = "Screenshots_WL/WL816k/";
    public const int PW = 1280, PH = 720;
    public const string MatDir = "Assets/WL/Look/Farm/Materials/";

    public static void Open()
    {
        UnityEditor.SceneManagement.EditorSceneManager.OpenScene(
            "Assets/Scenes/InGame.unity", UnityEditor.SceneManagement.OpenSceneMode.Single);
    }
    public static void Start()
    {
        var go = GameObject.Find("~WL816kP");
        if (go != null) Object.DestroyImmediate(go);
        go = new GameObject("~WL816kP");
        go.AddComponent<WL816k_ProbeRunner>();
    }

    public static Texture2D Grab(Camera cam, int w, int h)
    {
        var rt = new RenderTexture(w, h, 24, RenderTextureFormat.ARGB32, RenderTextureReadWrite.sRGB);
        rt.antiAliasing = 1; rt.Create();
        var pT = cam.targetTexture; var pA = RenderTexture.active;
        cam.targetTexture = rt; cam.Render(); RenderTexture.active = rt;
        var t = new Texture2D(w, h, TextureFormat.RGB24, false);
        t.ReadPixels(new Rect(0, 0, w, h), 0, 0); t.Apply();
        RenderTexture.active = pA; cam.targetTexture = pT; rt.Release(); Object.DestroyImmediate(rt);
        return t;
    }

    /// <summary>PD 구도 캡처 + ⓐ 바다 평균색 ⓑ 무늬 고주파 대비 σ ⓒ 밝은(거품) 픽셀 비율 ⓓ 어두운(깨짐) 픽셀 비율</summary>
    public static string Shot(Camera cam, string path, int w, int h)
    {
        System.IO.Directory.CreateDirectory(System.IO.Path.GetDirectoryName(path));
        var t = Grab(cam, w, h);
        System.IO.File.WriteAllBytes(path, t.EncodeToPNG());
        var px = t.GetPixels32();
        // 바다만 있는 왼쪽 아래 구역
        long r = 0, g = 0, b = 0; int n = 0; double sum = 0, sum2 = 0;
        int xm = Mathf.Min(340, w), ym = Mathf.Min(320, h);
        for (int y = 20; y < ym; y += 2)
            for (int x = 20; x < xm; x += 2)
            {
                var c = px[y * w + x]; r += c.r; g += c.g; b += c.b; n++;
                float lum = (0.299f * c.r + 0.587f * c.g + 0.114f * c.b) / 255f;
                sum += lum; sum2 += lum * lum;
            }
        double mean = n > 0 ? sum / n : 0;
        double sd = n > 0 ? System.Math.Sqrt(System.Math.Max(0, sum2 / n - mean * mean)) : 0;
        // 화면 아래 55 % 에서 밝은/어두운 픽셀
        int fn = 0, dn = 0, tot = 0; long fr = 0, fg = 0, fb = 0;
        int y1 = (int)(h * 0.55f);
        for (int y = 0; y < y1; y++)
            for (int x = 0; x < w; x += 2)
            {
                var c = px[y * w + x]; tot++;
                if (c.r > 200 && c.g > 195 && c.b > 195) { fr += c.r; fg += c.g; fb += c.b; fn++; }
                if (c.r < 40 && c.g < 40 && c.b < 40) dn++;
            }
        Object.DestroyImmediate(t);
        string foam = fn == 0 ? "밝음 0%" : "밝음 " + (100f * fn / tot).ToString("F2") + "% #"
            + ((int)(fr / fn)).ToString("X2") + ((int)(fg / fn)).ToString("X2") + ((int)(fb / fn)).ToString("X2")
            + "(R−B " + ((int)(fr / fn) - (int)(fb / fn)) + ")";
        return "바다 #" + ((int)(r / n)).ToString("X2") + ((int)(g / n)).ToString("X2") + ((int)(b / n)).ToString("X2")
             + " σ=" + sd.ToString("F4") + " · " + foam + " · 검정 " + (100f * dn / tot).ToString("F2") + "% → " + path;
    }

    public static void Strip(string[] paths, string outPath)
    {
        var ts = new Texture2D[paths.Length]; int w = 0, h = 0;
        for (int i = 0; i < paths.Length; i++)
        {
            if (!System.IO.File.Exists(paths[i])) return;
            ts[i] = new Texture2D(2, 2, TextureFormat.RGB24, false);
            ts[i].LoadImage(System.IO.File.ReadAllBytes(paths[i]));
            w = Mathf.Max(w, ts[i].width); h += ts[i].height;
        }
        var o = new Texture2D(w, h, TextureFormat.RGB24, false);
        var f = new Color32[w * h];
        for (int i = 0; i < f.Length; i++) f[i] = new Color32(24, 24, 28, 255);
        o.SetPixels32(f);
        int y = h;
        for (int i = 0; i < ts.Length; i++) { y -= ts[i].height; o.SetPixels32(0, y, ts[i].width, ts[i].height, ts[i].GetPixels32()); }
        o.Apply();
        System.IO.Directory.CreateDirectory(System.IO.Path.GetDirectoryName(outPath));
        System.IO.File.WriteAllBytes(outPath, o.EncodeToPNG());
        Object.DestroyImmediate(o);
        for (int i = 0; i < ts.Length; i++) Object.DestroyImmediate(ts[i]);
    }
}

public class WL816k_ProbeRunner : MonoBehaviour
{
    static StringBuilder sb;
    static void L(string s) { sb.AppendLine(s); }
    const string D = WL816k_Probe.D;
    const string MatDir = WL816k_Probe.MatDir;
    const int PW = WL816k_Probe.PW, PH = WL816k_Probe.PH;

    Camera live, zoom;
    Renderer water;
    MeshRenderer band;

    void Start() { StartCoroutine(Co()); }

    IEnumerator Co()
    {
        sb = new StringBuilder();
        L("=== WL-816k ② 데모 물 셰이더를 섬에 (PD 구도 · 거리 15 m) ===");
        var op = SceneManager.LoadSceneAsync("Level01", LoadSceneMode.Additive);
        while (op != null && !op.isDone) yield return null;
        for (int i = 0; i < 8; i++) yield return new WaitForSeconds(1f);

        foreach (var r in Object.FindObjectsByType<Renderer>(FindObjectsInactive.Exclude, FindObjectsSortMode.None))
            if (r != null && r.gameObject.scene.name == "Level01" && r.name == "Water") water = r;
        foreach (var c in Object.FindObjectsByType<Camera>(FindObjectsInactive.Exclude, FindObjectsSortMode.None))
        {
            if (!c.gameObject.activeInHierarchy || !c.enabled || c.targetTexture != null) continue;
            if (c.name.StartsWith("~WL816")) continue;
            if (live == null || c.depth > live.depth) live = c;
        }
        var foam = Object.FindFirstObjectByType<WLShoreFoam>(FindObjectsInactive.Include);
        band = foam != null ? foam.GetComponent<MeshRenderer>() : null;
        if (water == null || live == null) { L("🔴 물/카메라 없음"); Done(); yield break; }

        L("카메라 " + live.name + " pos=" + live.transform.position.ToString("F2") + " 각=" + live.transform.eulerAngles.ToString("F0")
          + " fov=" + live.fieldOfView + " · 거리 " + live.transform.position.magnitude.ToString("F1") + " m");
        L("물 오브젝트 " + water.name + " pos=" + water.transform.position.ToString("F2")
          + " scale=" + water.transform.localScale.ToString("F1") + " · 지금 mat=" + water.sharedMaterial.name
          + "(queue " + water.sharedMaterial.renderQueue + ")");
        L("둘레 띠 = " + (band == null ? "🔴 없음" : "있음 · " + WLShoreFoam.LastLog));

        var E = UnityEditor.AssetDatabase.LoadAssetAtPath<Material>(MatDir + "Farm_Water_WL_E.mat");
        var Demo = UnityEditor.AssetDatabase.LoadAssetAtPath<Material>(MatDir + "Farm_Water_Demo.mat");
        var FI = UnityEditor.AssetDatabase.LoadAssetAtPath<Material>(MatDir + "Farm_SimpleWater_Demo.mat");
        L("머티리얼: E=" + (E == null ? "null" : "q" + E.renderQueue) + " Demo=" + (Demo == null ? "null" : "q" + Demo.renderQueue)
          + " FI=" + (FI == null ? "null" : "q" + FI.renderQueue));
        if (Demo == null) { L("🔴 Farm_Water_Demo 없음"); Done(); yield break; }

        // 물가 확대 카메라
        var zgo = new GameObject("~WL816kZ"); zgo.hideFlags = HideFlags.DontSave;
        zoom = zgo.AddComponent<Camera>();
        zoom.fieldOfView = 34f; zoom.nearClipPlane = 0.1f; zoom.farClipPlane = 2000f;
        zoom.clearFlags = CameraClearFlags.Skybox; zoom.cullingMask = ~0; zoom.depth = -100f;
        zgo.AddComponent<UniversalAdditionalCameraData>().renderPostProcessing = true;
        Bounds b = band != null ? band.bounds : new Bounds(Vector3.zero, new Vector3(16, 1, 16));
        zgo.transform.position = new Vector3(b.center.x, 3.2f, b.min.z - 9f);
        zgo.transform.LookAt(new Vector3(b.center.x, -1f, b.min.z + 2f));

        // ── 1) 지금(E + 띠) ────────────────────────────────────
        L("");
        L("1) 지금 상태 (물 E + 띠 on)");
        yield return Show(E, true, "a1_now");

        // ── 2) 데모 물 그대로 (띠 off) ──────────────────────────
        L("");
        L("2) 데모 물 그대로 — 원본 값 · 띠 off");
        yield return Show(Demo, false, "b1_demo_raw");

        // ── 3) 데모 물 + queue 3000 ────────────────────────────
        L("");
        L("3) 데모 물 · renderQueue 3000 (투명 정렬) · 띠 off");
        var q3 = new Material(Demo); q3.renderQueue = 3000;
        yield return Show(q3, false, "b2_demo_q3000");

        // ── 4) 무늬가 UV 기반인지 — 평면이 100배라 100배 스케일이 필요한가 ──
        L("");
        L("4) 무늬 스케일 — 데모 평면 10 m vs 섬 물 1000 m (UV 기반이면 ×100 이 필요)");
        float[] fs = { 50f, 500f, 5000f };
        var names = new string[3];
        for (int i = 0; i < 3; i++)
        {
            var m = new Material(Demo); m.renderQueue = 3000;
            m.SetFloat("_FoamScale", fs[i]);
            m.SetFloat("_Bands", 78.52f * (fs[i] / 50f));
            names[i] = D + "c_scale" + (i + 1) + ".png";
            yield return Show(m, false, "c_scale" + (i + 1), "   _FoamScale " + fs[i] + " _Bands " + (78.52f * (fs[i] / 50f)));
        }
        WL816k_Probe.Strip(names, D + "c_scale_steps.png");

        // ── 5) 데모 씬 물 자체를 나란히 (기준) ──────────────────
        L("");
        L("5) [기준] FI SimpleWater (816h 이전 물)");
        if (FI != null) yield return Show(FI, false, "d_fi");

        Object.DestroyImmediate(zgo);
        // 원복
        water.sharedMaterial = E; if (band != null) band.enabled = true;
        Done();
    }

    IEnumerator Show(Material m, bool bandOn, string tag, string note = null)
    {
        water.sharedMaterial = m;
        if (band != null) band.enabled = bandOn;
        yield return null; yield return new WaitForSeconds(0.35f);
        if (note != null) L(note);
        L("   PD  " + WL816k_Probe.Shot(live, D + tag + ".png", PW, PH));
        L("   물가 " + WL816k_Probe.Shot(zoom, D + tag + "_zoom.png", PW, PH));
    }

    void Done()
    {
        System.IO.File.WriteAllText("AgentScripts/WL816k_PROBE.txt", sb.ToString());
        Debug.Log("[816k probe]\n" + sb);
    }
}