// WL-816h — ⓓ 데모 씬과 나란히 (에디트 모드 렌더 · §9 데모 Play 안 함)
using UnityEngine;
using UnityEngine.Rendering.Universal;
using UnityEditor;

public static class WL816h_Demo
{
    const string Dir = "Screenshots_WL/WL816h/";
    const int W = 1080, H = 1920;

    public static void Run()
    {
        var sb = new System.Text.StringBuilder();
        UnityEditor.SceneManagement.EditorSceneManager.OpenScene(
            "Assets/LowPolyFantasyArena/Scenes/LowPolyArena_Demo.unity",
            UnityEditor.SceneManagement.OpenSceneMode.Single);

        // 수평선이 보이는 화각 — 우리 섬 캡처(b_after_horizon)와 같은 fov·피치
        var go = new GameObject("~WL816hDemoCam"); go.hideFlags = HideFlags.DontSave;
        var c = go.AddComponent<Camera>();
        c.orthographic = false; c.fieldOfView = 55f; c.nearClipPlane = 0.3f; c.farClipPlane = 2000f;
        c.clearFlags = CameraClearFlags.Skybox; c.cullingMask = ~0; c.depth = -100f;
        go.transform.position = new Vector3(-14f, 8f, -14f);
        go.transform.rotation = Quaternion.Euler(4f, 45f, 0f);
        go.AddComponent<UniversalAdditionalCameraData>();

        sb.AppendLine("데모 = " + Shot(c, Dir + "x_demo_horizon.png"));
        Object.DestroyImmediate(go);

        Pair(Dir + "x_demo_horizon.png", Dir + "b_after_horizon.png", Dir + "d_demo_vs_island.png");
        sb.AppendLine("나란히 = " + Dir + "d_demo_vs_island.png (좌 데모 / 우 우리 섬 · 같은 화각)");
        System.IO.File.WriteAllText("AgentScripts/WL816h_DEMO.txt", sb.ToString());
        Debug.Log("[816h demo]\n" + sb);

        // 다음 작업을 위해 InGame 으로 돌려 둔다(데모 씬 저장 0)
        UnityEditor.SceneManagement.EditorSceneManager.OpenScene(
            "Assets/Scenes/InGame.unity", UnityEditor.SceneManagement.OpenSceneMode.Single);
    }

    static string Shot(Camera cam, string path)
    {
        System.IO.Directory.CreateDirectory(System.IO.Path.GetDirectoryName(path));
        var rt = new RenderTexture(W, H, 24, RenderTextureFormat.ARGB32, RenderTextureReadWrite.sRGB);
        rt.antiAliasing = 1; rt.Create();
        var pA = RenderTexture.active;
        cam.targetTexture = rt; cam.Render(); RenderTexture.active = rt;
        var tex = new Texture2D(W, H, TextureFormat.RGB24, false);
        tex.ReadPixels(new Rect(0, 0, W, H), 0, 0); tex.Apply();
        RenderTexture.active = pA; cam.targetTexture = null;
        System.IO.File.WriteAllBytes(path, tex.EncodeToPNG());
        var px = tex.GetPixels32(); long r = 0, g = 0, b = 0;
        for (int i = 0; i < px.Length; i += 7) { r += px[i].r; g += px[i].g; b += px[i].b; }
        int n = (px.Length + 6) / 7;
        Object.DestroyImmediate(tex); rt.Release(); Object.DestroyImmediate(rt);
        return "#" + ((int)(r / n)).ToString("X2") + ((int)(g / n)).ToString("X2") + ((int)(b / n)).ToString("X2") + " → " + path;
    }

    static void Pair(string left, string right, string outPath)
    {
        var a = Load(left); var b = Load(right);
        if (a == null || b == null) { Debug.Log("[816h] 나란히 실패 " + left + " / " + right); return; }
        int w = a.width + b.width, h = Mathf.Max(a.height, b.height);
        var o = new Texture2D(w, h, TextureFormat.RGB24, false);
        var fill = new Color32[w * h];
        for (int i = 0; i < fill.Length; i++) fill[i] = new Color32(24, 24, 28, 255);
        o.SetPixels32(fill);
        o.SetPixels32(0, 0, a.width, a.height, a.GetPixels32());
        o.SetPixels32(a.width, 0, b.width, b.height, b.GetPixels32());
        o.Apply();
        System.IO.File.WriteAllBytes(outPath, o.EncodeToPNG());
        Object.DestroyImmediate(o); Object.DestroyImmediate(a); Object.DestroyImmediate(b);
    }

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