// WL-816j2 — ⑥ 격자선 세기를 실제로 낮추는 값 찾기 (PD 구도 · 6단 스윕 · 평균 바다색은 유지)
using System.Collections;
using System.Text;
using UnityEngine;

public static class WL816j2_Sweep
{
    public const string D = "Screenshots_WL/WL816j2/";
    public static void Start()
    {
        var go = GameObject.Find("~WL816j2S");
        if (go != null) Object.DestroyImmediate(go);
        go = new GameObject("~WL816j2S");
        go.AddComponent<WL816j2_SweepRunner>();
    }
}

public class WL816j2_SweepRunner : MonoBehaviour
{
    static StringBuilder sb;
    static void L(string s) { sb.AppendLine(s); }
    const string D = WL816j2_Sweep.D;
    const int PW = 1280, PH = 720;
    const string C_Light = "Color_1ec6cccf8ead489ebb917674f7e8b3b1";
    const string C_FoamShadow = "Color_2323d69962e04c499c5d5f0925432b55";
    const string C_Water = "Color_9af4ad59934f40d1ae6565e6ab22c45e";
    const string C_Dark = "Color_ca031ae309ff42bdb95f777248fb961d";
    const string R_DeepDistance = "Vector1_566e288f42864b8e9432d81fbdb83f38";

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

    string Shot(Camera cam, string path)
    {
        System.IO.Directory.CreateDirectory(System.IO.Path.GetDirectoryName(path));
        var rt = new RenderTexture(PW, PH, 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(PW, PH, TextureFormat.RGB24, false);
        t.ReadPixels(new Rect(0, 0, PW, PH), 0, 0); t.Apply();
        RenderTexture.active = pA; cam.targetTexture = pT; rt.Release(); Object.DestroyImmediate(rt);
        System.IO.File.WriteAllBytes(path, t.EncodeToPNG());
        var px = t.GetPixels32();
        long r = 0, g = 0, b = 0; int n = 0;
        for (int y = 20; y < 320; y += 2)
            for (int x = 20; x < 340; x += 2) { var c = px[y * PW + x]; r += c.r; g += c.g; b += c.b; n++; }
        Object.DestroyImmediate(t);
        return "바다 평균 #" + ((int)(r / n)).ToString("X2") + ((int)(g / n)).ToString("X2") + ((int)(b / n)).ToString("X2") + " → " + path;
    }

    IEnumerator Co()
    {
        sb = new StringBuilder();
        L("=== WL-816j2 ⑥ 격자선 세기 스윕 (바다 평균색은 유지해야 한다) ===");
        Renderer water = null;
        foreach (var r in Object.FindObjectsByType<Renderer>(FindObjectsInactive.Exclude, FindObjectsSortMode.None))
            if (r != null && r.gameObject.scene.name == "Level01" && r.name == "Water") water = r;
        Camera live = null;
        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;
        }
        if (water == null || live == null) { L("🔴 없음"); Done(); yield break; }
        var E = UnityEditor.AssetDatabase.LoadAssetAtPath<Material>("Assets/WL/Look/Farm/Materials/Farm_Water_WL_E.mat");
        Color W = E.GetColor(C_Water), Dk = E.GetColor(C_Dark);
        L("816h 채택색 WaterColor " + W + " DarkColor " + Dk);

        var names = new string[]
        {
            "0 기준 E",
            "1 Shadow=0.30 회색",
            "2 Shadow=흰색",
            "3 Dark→Water 50%",
            "4 Dark→Water 75%",
            "5 Dark→Water 75% + Light=Water + Shadow=흰색",
            "6 Dark→Water 90% + Light=Water + Shadow=흰색",
        };
        for (int i = 0; i < names.Length; i++)
        {
            var m = new Material(E);
            if (i == 1) m.SetColor(C_FoamShadow, new Color(0.30f, 0.30f, 0.30f, 1f));
            if (i == 2) m.SetColor(C_FoamShadow, Color.white);
            if (i == 3) m.SetColor(C_Dark, Color.Lerp(Dk, W, 0.50f));
            if (i == 4) m.SetColor(C_Dark, Color.Lerp(Dk, W, 0.75f));
            if (i == 5) { m.SetColor(C_Dark, Color.Lerp(Dk, W, 0.75f)); m.SetColor(C_Light, W); m.SetColor(C_FoamShadow, Color.white); }
            if (i == 6) { m.SetColor(C_Dark, Color.Lerp(Dk, W, 0.90f)); m.SetColor(C_Light, W); m.SetColor(C_FoamShadow, Color.white); }
            water.sharedMaterial = m; yield return null; yield return new WaitForSeconds(0.25f);
            L(names[i] + " · " + Shot(live, D + "m_sweep" + i + ".png"));
        }
        Done();
    }
    void Done()
    {
        System.IO.File.WriteAllText("AgentScripts/WL816j2_SWEEP.txt", sb.ToString());
        Debug.Log("[816j2 sweep]\n" + sb);
    }
}