import 'package:flutter/services.dart';
import 'package:path/path.dart';
import 'package:path_provider/path_provider.dart';
import 'package:sqflite/sqflite.dart';
import 'package:sqflite_common_ffi/sqflite_ffi.dart' as sqflite_ffi;
import 'package:sqflite_common_ffi/sqflite_ffi.dart';
import 'package:youmazgestion/Models/users.dart';
import 'dart:io';

class AuthDatabase {
  static final AuthDatabase instance = AuthDatabase._init();
  late Database _database;

  AuthDatabase._init() {
    sqflite_ffi.sqfliteFfiInit();
  }

  Future<void> initDatabase() async {
    _database = await _initDB('usersDb.db');
    await _createDB(_database, 1);
  }

  Future<Database> get database async {
    if (_database.isOpen) return _database;

    _database = await _initDB('usersDb.db');
    return _database;
  }

  Future<Database> _initDB(String filePath) async {
    // Obtenez le répertoire de stockage local de l'application
    final documentsDirectory = await getApplicationDocumentsDirectory();
    final path = join(documentsDirectory.path, filePath);

    // Vérifiez si le fichier de base de données existe déjà dans le répertoire de stockage local
    bool dbExists = await File(path).exists();
    if (!dbExists) {
      // Si le fichier n'existe pas, copiez-le depuis le dossier assets/database
      ByteData data = await rootBundle.load('assets/database/$filePath');
      List<int> bytes =
          data.buffer.asUint8List(data.offsetInBytes, data.lengthInBytes);
      await File(path).writeAsBytes(bytes);
    }

    // Ouvrez la base de données
    return await databaseFactoryFfi.openDatabase(path);
  }

  Future<void> _createDB(Database db, int version) async {
    final resultUsers = await db.rawQuery(
        "SELECT name FROM sqlite_master WHERE type='table' AND name='users'");

    if (resultUsers.isEmpty) {
      await db.execute('''
      CREATE TABLE users (
        id INTEGER PRIMARY KEY AUTOINCREMENT,
        name TEXT,
        lastname TEXT,
        email TEXT,
        password TEXT,
        username TEXT,
        role TEXT
      )
    ''');
    }
  }

  Future<int> createUser(Users user) async {
    final db = await database;
    return await db.insert('users', user.toMap());
  }

  Future<int> deleteUser(int id) async {
    final db = await database;
    return await db.delete('users', where: 'id = ?', whereArgs: [id]);
  }

  Future<int> updateUser(Users user) async {
    final db = await database;
    return await db
        .update('users', user.toMap(), where: 'id = ?', whereArgs: [user.id]);
  }

  Future<int> getUserCount() async {
    final db = await database;
    List<Map<String, dynamic>> x =
        await db.rawQuery('SELECT COUNT (*) from users');
    int result = Sqflite.firstIntValue(x)!;
    return result;
  }

  // verify username and password existe
  Future<bool> verifyUser(String username, String password) async {
    final db = await database;
    List<Map<String, dynamic>> x = await db.rawQuery(
        'SELECT COUNT (*) from users WHERE username = ? AND password = ?',
        [username, password]);
    int result = Sqflite.firstIntValue(x)!;
    if (result == 1) {
      return true;
    } else {
      return false;
    }
  }

  //recuperer un user grace a son username
  Future<Users> getUser(String username) async {
    try {
      final db = await database;
      List<Map<String, dynamic>> x = await db
          .rawQuery('SELECT * from users WHERE username = ?', [username]);
      print(x.first);
      Users user = Users.fromMap(x.first);
      print(user);
      return user;
    } catch (e) {
      print(e);
      rethrow;
    }
  }

  Future<Map<String, String>?> getUserCredentials(String username, String password) async {
  final db = await database;

  List<Map<String, dynamic>> result = await db.rawQuery(
    'SELECT username, role FROM users WHERE username = ? AND password = ?',
    [username, password],
  );

  if (result.isNotEmpty) {
    print('username '+result[0]['username']);
    return {
      'username': result[0]['username'],
      'role': result[0]['role'],
    };
  } else {
    return null; // Aucun utilisateur trouvé
  }
}

  Future<List<Users>> getAllUsers() async {
    final db = await database;
    const orderBy = 'id ASC';
    final result = await db.query('users', orderBy: orderBy);
    return result.map((json) => Users.fromMap(json)).toList();
  }
}