import 'dart:io';

import 'package:flutter/services.dart' show rootBundle;
import 'package:jni/jni.dart';
import 'package:k3vinb5_aniyomi_bridge/jmodels/janiyomibridge.dart';
import 'package:k3vinb5_aniyomi_bridge/jmodels/jsanime.dart';
import 'package:path/path.dart' as path;
import 'package:path_provider/path_provider.dart';
import 'package:archive/archive.dart';

class AniyomiBridge {
  
  static final _aniyomiBridgeDir = "aniyomibridge";
  static final _packageAssetsDir = "packages/k3vinb5_aniyomi_bridge/assets";

  Future<void> initJvm() async{
    Directory supportDirectory = await getApplicationSupportDirectory();
    _loadJreIfNeeded(supportDirectory);
    _loadJarIfNeeded(supportDirectory);
    Jni.spawn(
      dylibDir: _getDylibDir(supportDirectory),
      classPath: _getClassPath(supportDirectory)
    );
    JAniyomiBridge.init();
    JAniyomiBridge jAniyomiBridge = JAniyomiBridge();
    jAniyomiBridge.loadExtension(JString.fromString("https://gitea.k3vinb5.dev/Backups/kohi-den-extensions/raw/branch/main/apk/aniyomi-en.allanime-v14.37.apk"));
    JList<JObject?>? searchResults = jAniyomiBridge.getSearchResults(JString.fromString("Naruto"), 1, JString.fromString("allanime"));
    print("Search results size: ${searchResults?.length}");
      if (searchResults != null) {
        for (JObject obj in searchResults.cast()) {
          print(obj.toString());
          JSAnime jsAnime = obj.as<JSAnime>(JSAnime.type);
          print(jsAnime.getTitle().toDartString());
          print(jsAnime.getUrl().toDartString());
        }
    }
  }

  String _getDylibDir(Directory supportDirectory) {
    String basePath = path.join(supportDirectory.absolute.path, _aniyomiBridgeDir);
    if (Platform.isLinux) {
      return path.join(basePath, "jre", "linux", "customjre", "lib", "server");
    } else if (Platform.isMacOS) {
      return path.join(basePath, "jre", "macos", "customjre", "lib", "server");
    } else if (Platform.isWindows) {
      return path.join(basePath, "jre", "windows", "customjre", "lib", "server");
    } else {
      throw UnsupportedError("Unsupported platform");
    }
  }
  
  List<String> _getClassPath(Directory supportDirectory) {
    return [path.join(supportDirectory.absolute.path, _aniyomiBridgeDir, "aniyomibridge-core.jar")];
  }

  Future<void> _loadJarIfNeeded(Directory supportDirectory) async {
    String aniyomiBridgeCorePath = path.join(supportDirectory.path, _aniyomiBridgeDir, "aniyomibridge-core.jar");
    File aniyomiBridgeCore = File(aniyomiBridgeCorePath);
    if (!(await aniyomiBridgeCore.exists())) {
      copyAssetToFile("$_packageAssetsDir/aniyomibridge-core.jar", aniyomiBridgeCorePath);
    }
  }

  Future<void> _loadJreIfNeeded(Directory supportDirectory) async {
    String zippedJrePath = path.join(supportDirectory.path, _aniyomiBridgeDir, "jre.zip");
    File zippedJre = File(zippedJrePath);
    if (!(await zippedJre.exists())) {
      await copyAssetToFile("$_packageAssetsDir/jre.zip", zippedJrePath);
    }
    Directory jreDir = Directory(path.join(supportDirectory.path, _aniyomiBridgeDir, "jre"));
    if (!(await jreDir.exists())) {
       final bytes = await zippedJre.readAsBytes();
       final jreArchive = ZipDecoder().decodeBytes(bytes);
       await _unzipFileToDir(jreArchive, "jre", jreDir.path);
       zippedJre.deleteSync(recursive: false);
    }
  }

  Future<void> _unzipFileToDir(Archive archive, String archiveName, String outDirPath) async{
    outDirPath = outDirPath.replaceAll("/$archiveName", "");
    for (final file in archive) {
         final filename = file.name;
         if (file.isFile) {
           final data = file.content as List<int>;
           final outFile = File(path.join(outDirPath, filename));
           await outFile.parent.create(recursive: true);
           await outFile.writeAsBytes(data);
         } else {
           await Directory(path.join(outDirPath, filename)).create(recursive: true);
         }
       }
  }

  Future<File> copyAssetToFile(String assetPath, String outPath) async {
    final byteData = await rootBundle.load(assetPath);
    final buffer = byteData.buffer.asUint8List();
    final file = File(outPath);
    await file.parent.create(recursive: true);
    await file.writeAsBytes(buffer, flush: true);
    return file;
  }
}