using System.Collections.Generic;
using System.IO;
using System.Text;
using UnityEditor;
using UnityEngine;

// WL837 — ExplosiveLLC Warrior 데모 씬을 URP 프로젝트에서 보이게 하는 보정 2종 (에디트 모드 전용 · Play 중 실행 금지)
//   FixGuiCamera(apply)  : Warrior/Demo Elements/Prefabs/Camera.prefab 의 보조 'GUI Camera'(Depth-only · TransparentFX 만) 를 끈다.
//                          URP 는 Base 카메라마다 화면을 다시 그려 이 카메라가 메인 화면을 회색으로 덮는다(실측 2026-10-11).
//   ConvertMaterials(apply): Assets/ExplosiveLLC 아래 내장 Standard 셰이더 머티리얼 → Universal Render Pipeline/Lit (주요 속성 매핑).
//   실행: unity command run_script --file AgentScripts/WL837_DemoFixes.cs --entry WL837_DemoFixes.FixGuiCamera --args '[true]'
//         unity command run_script --file AgentScripts/WL837_DemoFixes.cs --entry WL837_DemoFixes.ConvertMaterials --args '[true]'
public static class WL837_DemoFixes
{
    const string CameraPrefab = "Assets/ExplosiveLLC/Warrior/Demo Elements/Prefabs/Camera.prefab";
    const string Root = "Assets/ExplosiveLLC";

    public static string FixGuiCamera(bool apply)
    {
        if (EditorApplication.isPlaying) return "skipped: playing";
        var root = PrefabUtility.LoadPrefabContents(CameraPrefab);
        try
        {
            Camera gui = null;
            foreach (var c in root.GetComponentsInChildren<Camera>(true)) if (c.gameObject.name == "GUI Camera") gui = c;
            if (gui == null) return "GUI Camera: not found in " + CameraPrefab;
            string before = "GUI Camera enabled=" + gui.enabled + " clear=" + gui.clearFlags + " mask=" + gui.cullingMask + " depth=" + gui.depth;
            if (!apply || !gui.enabled) return before + (apply ? " (already off)" : " (dry run)");
            gui.enabled = false;
            PrefabUtility.SaveAsPrefabAsset(root, CameraPrefab);
            return before + " -> enabled=false saved";
        }
        finally { PrefabUtility.UnloadPrefabContents(root); }
    }

    public static string ConvertMaterials(bool apply)
    {
        if (EditorApplication.isPlaying) return "skipped: playing";
        var lit = Shader.Find("Universal Render Pipeline/Lit");
        if (lit == null) return "URP Lit shader not found";
        var sb = new StringBuilder();
        int n = 0, done = 0;
        foreach (var guid in AssetDatabase.FindAssets("t:Material", new[] { Root }))
        {
            var path = AssetDatabase.GUIDToAssetPath(guid);
            var m = AssetDatabase.LoadAssetAtPath<Material>(path);
            if (m == null || m.shader == null || m.shader.name != "Standard") continue;
            n++;
            if (!apply) { sb.Append("would convert: ").Append(Path.GetFileName(path)).Append('\n'); continue; }
            // Standard 값 보관
            Texture main = m.HasProperty("_MainTex") ? m.GetTexture("_MainTex") : null;
            Vector2 sc = m.HasProperty("_MainTex") ? m.GetTextureScale("_MainTex") : Vector2.one, off = m.HasProperty("_MainTex") ? m.GetTextureOffset("_MainTex") : Vector2.zero;
            Color col = m.HasProperty("_Color") ? m.GetColor("_Color") : Color.white;
            Texture bump = m.HasProperty("_BumpMap") ? m.GetTexture("_BumpMap") : null;
            float bumpScale = m.HasProperty("_BumpScale") ? m.GetFloat("_BumpScale") : 1f;
            Texture metal = m.HasProperty("_MetallicGlossMap") ? m.GetTexture("_MetallicGlossMap") : null;
            float metallic = m.HasProperty("_Metallic") ? m.GetFloat("_Metallic") : 0f;
            float gloss = m.HasProperty("_Glossiness") ? m.GetFloat("_Glossiness") : 0.5f;
            Texture occ = m.HasProperty("_OcclusionMap") ? m.GetTexture("_OcclusionMap") : null;
            Texture emi = m.HasProperty("_EmissionMap") ? m.GetTexture("_EmissionMap") : null;
            Color emiCol = m.HasProperty("_EmissionColor") ? m.GetColor("_EmissionColor") : Color.black;
            bool emission = m.IsKeywordEnabled("_EMISSION");
            float mode = m.HasProperty("_Mode") ? m.GetFloat("_Mode") : 0f; // 0 opaque 1 cutout 2 fade 3 transparent
            float cutoff = m.HasProperty("_Cutoff") ? m.GetFloat("_Cutoff") : 0.5f;

            m.shader = lit;
            if (main) { m.SetTexture("_BaseMap", main); m.SetTextureScale("_BaseMap", sc); m.SetTextureOffset("_BaseMap", off); }
            m.SetColor("_BaseColor", col);
            if (bump) { m.SetTexture("_BumpMap", bump); m.SetFloat("_BumpScale", bumpScale); m.EnableKeyword("_NORMALMAP"); }
            if (metal) { m.SetTexture("_MetallicGlossMap", metal); m.EnableKeyword("_METALLICSPECGLOSSMAP"); }
            m.SetFloat("_Metallic", metallic);
            m.SetFloat("_Smoothness", gloss);
            if (occ) { m.SetTexture("_OcclusionMap", occ); m.EnableKeyword("_OCCLUSIONMAP"); }
            if (emission) { m.SetColor("_EmissionColor", emiCol); if (emi) m.SetTexture("_EmissionMap", emi); m.EnableKeyword("_EMISSION"); m.globalIlluminationFlags = MaterialGlobalIlluminationFlags.RealtimeEmissive; }
            if (mode >= 1.5f) { m.SetFloat("_Surface", 1); m.SetFloat("_Blend", 0); m.SetOverrideTag("RenderType", "Transparent"); m.renderQueue = (int)UnityEngine.Rendering.RenderQueue.Transparent; m.EnableKeyword("_SURFACE_TYPE_TRANSPARENT"); m.SetFloat("_ZWrite", 0); m.SetFloat("_SrcBlend", (float)UnityEngine.Rendering.BlendMode.SrcAlpha); m.SetFloat("_DstBlend", (float)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha); }
            else if (mode >= 0.5f) { m.SetFloat("_AlphaClip", 1); m.SetFloat("_Cutoff", cutoff); m.EnableKeyword("_ALPHATEST_ON"); m.SetOverrideTag("RenderType", "TransparentCutout"); m.renderQueue = (int)UnityEngine.Rendering.RenderQueue.AlphaTest; }
            EditorUtility.SetDirty(m);
            done++;
            sb.Append("converted: ").Append(Path.GetFileName(path)).Append(main ? " tex" : "").Append(bump ? " normal" : "").Append(metal ? " metalmap" : "").Append(mode >= 0.5f ? " mode" + mode : "").Append('\n');
        }
        if (apply && done > 0) AssetDatabase.SaveAssets();
        sb.Insert(0, "standard materials=" + n + " converted=" + done + "\n");
        return sb.ToString();
    }
}