using UnityEngine;
using UnityEditor;
using System;
using System.IO;
using System.Linq;
using System.Reflection;
using UnityMeshSimplifier; 

public class TestBuilder
{
    // ==========================================
    // FASE 1: MINIFY MESH
    // ==========================================
    public static void ManualConvert()
    {
        try
        {
            // --- WORKER LIMIT ---
            Unity.Jobs.LowLevel.Unsafe.JobsUtility.JobWorkerCount = 4;
            Debug.Log($"⚙️ [CLI] Job Worker Count: {Unity.Jobs.LowLevel.Unsafe.JobsUtility.JobWorkerCount}");

            // --- BACKEND FIX ---
            PlayerSettings.SetScriptingBackend(BuildTargetGroup.Standalone, ScriptingImplementation.Mono2x);
            PlayerSettings.SetScriptingBackend(BuildTargetGroup.Android, ScriptingImplementation.Mono2x);
            PlayerSettings.SetScriptingBackend(BuildTargetGroup.iOS, ScriptingImplementation.IL2CPP);

            // --- PROSES PERAMPINGAN MESH ---
            string inputPath = "Assets/InputRaw";
            if (Directory.Exists(inputPath))
            {
                string[] prefabs = Directory.GetFiles(inputPath, "*.prefab", SearchOption.AllDirectories);
                foreach (string path in prefabs)
                {
                    GameObject go = PrefabUtility.LoadPrefabContents(path);
                    if (go != null)
                    {
                        Debug.Log($"📦 Merampingkan Mesh: {path}");
                        SimplifyMesh(go, path);
                        PrefabUtility.SaveAsPrefabAsset(go, path);
                        PrefabUtility.UnloadPrefabContents(go);
                    }
                }
            }

            AssetDatabase.SaveAssets();
            AssetDatabase.Refresh();

            Debug.Log("✅ [CLI] Fase 1 (Minify) selesai dengan sukses. Menutup instance untuk masuk Fase Upload.");
            EditorApplication.Exit(0);
        }
        catch (Exception e)
        {
            Debug.LogError($"💀 [ERROR FATAL FASE 1] {e.ToString()}");
            EditorApplication.Exit(1);
        }
    }

    // ==========================================
    // FASE 2: UPLOAD ZEPETO 
    // ==========================================
    public static void ZepetoUploadPhase()
    {
        try
        {
            Debug.Log("🚀 [CLI] Memulai Fase 2: Eksekusi Pengepakan & Upload ZEPETO...");
            
            Type zepetoType = null;
            
            // Pencarian Aman (Safe Reflection)
            foreach (var assembly in AppDomain.CurrentDomain.GetAssemblies())
            {
                try
                {
                    var types = assembly.GetTypes();
                    var foundType = types.FirstOrDefault(t => t != null && t.Name == "ZepetoPackageCliBuilder");
                    if (foundType != null)
                    {
                        zepetoType = foundType;
                        break;
                    }
                }
                catch (ReflectionTypeLoadException e)
                {
                    var foundType = e.Types.FirstOrDefault(t => t != null && t.Name == "ZepetoPackageCliBuilder");
                    if (foundType != null)
                    {
                        zepetoType = foundType;
                        break;
                    }
                }
                catch (Exception) {}
            }

            if (zepetoType != null)
            {
                MethodInfo buildMethod = zepetoType.GetMethod("BuildWithArgs", BindingFlags.Public | BindingFlags.Static);
                if (buildMethod != null)
                {
                    Debug.Log("✅ [CLI] Memanggil ZepetoPackageCliBuilder.BuildWithArgs()...");
                    buildMethod.Invoke(null, null);
                    // Dibiarkan tanpa Exit(0) agar thread asinkron ZEPETO bisa berjalan untuk Upload
                }
                else
                {
                    Debug.LogError("💀 [ERROR FASE 2] Method BuildWithArgs tidak ditemukan di class ZepetoPackageCliBuilder!");
                    EditorApplication.Exit(1);
                }
            }
            else
            {
                Debug.LogError("💀 [ERROR FASE 2] Class ZepetoPackageCliBuilder tidak ditemukan! Pastikan library Zepeto sudah ter-load di Fase 2.");
                EditorApplication.Exit(1);
            }
        }
        catch (Exception e)
        {
            Debug.LogError($"💀 [ERROR FATAL FASE 2 ASLI] {e.ToString()}");
            EditorApplication.Exit(1);
        }
    }

    static void SimplifyMesh(GameObject go, string path)
    {
        var renderers = go.GetComponentsInChildren<Renderer>();
        foreach (var ren in renderers)
        {
            Mesh src = (ren is MeshRenderer mr) ? ren.GetComponent<MeshFilter>()?.sharedMesh :
                      (ren is SkinnedMeshRenderer smr) ? smr.sharedMesh : null;

            if (src != null && !src.name.Contains("_Internal"))
            {
                string assetPath = AssetDatabase.GetAssetPath(src);
                if (!string.IsNullOrEmpty(assetPath))
                {
                    ModelImporter importer = AssetImporter.GetAtPath(assetPath) as ModelImporter;
                    if (importer != null && !importer.isReadable)
                    {
                        importer.isReadable = true;
                        importer.SaveAndReimport();
                    }
                }

                var simplifier = new MeshSimplifier();
                simplifier.Initialize(src);
                simplifier.SimplifyMesh(0.05f); // Sisa 5% poligon
                Mesh newMesh = simplifier.ToMesh();
                newMesh.name = src.name + "_Internal";
                
                string directory = Path.GetDirectoryName(path);
                string newMeshPath = Path.Combine(directory, newMesh.name + "_" + Guid.NewGuid().ToString().Substring(0, 5) + ".asset");
                newMeshPath = newMeshPath.Replace("\\", "/");
                AssetDatabase.CreateAsset(newMesh, newMeshPath);
                
                if (ren is MeshRenderer) ren.GetComponent<MeshFilter>().sharedMesh = newMesh;
                else if (ren is SkinnedMeshRenderer s) s.sharedMesh = newMesh;
            }
        }
    }
}