import 'dart:async';
import 'dart:io';
import 'package:authsec_flutter_hybrid/LocalStorage/TableQuery.dart';
import 'package:path/path.dart';
import 'package:path_provider/path_provider.dart';
import 'package:sqflite_common_ffi/sqflite_ffi.dart';

class DatabaseHelper {
  DatabaseHelper.internal();
  static final DatabaseHelper instance = DatabaseHelper.internal();
  TableQuery tablequery = TableQuery();
  // factory DatabaseHelper() => instance;

  static DatabaseHelper? _instance;
  static Database? _database;

  DatabaseHelper._privateConstructor();

  factory DatabaseHelper() {
    _instance ??= DatabaseHelper._privateConstructor();
    return _instance!;
  }

  Future<Database> get database async {
    if (_database != null) {
      print('get database ... $_database');
      return _database!;
    }
    _database = await initDatabase();
    return _database!;
  }

  Future<Database> initDatabase() async {
    try {
      Directory directory = await getApplicationDocumentsDirectory();
      String path = join(directory.path, 'my_database.db');
      print('database path is $path');

      // final db = await openDatabase('my_database.db');

      var openDb = await openDatabase(
        path,
        version: 1,
        onCreate: (db, version) => _createDatabaseTables(db),
        onUpgrade: (db, int oldversion, int newversion) async {
          if (oldversion < newversion) {
            print("Version Upgrade");
          }
        },
      );

      // Check if the table exists
      // var tableResult = await openDb.query('sqlite_master',
      //     columns: ['name'],
      //     where: 'type = ? AND name = ?',
      //     whereArgs: ['table', 'company']);

      // if (tableResult.isEmpty) {
      //   print('Table does not exist');
      // } else {
      //   print('table data is $tableResult');
      //   print('company Table exists');
      // }

      print('open db is...... ${openDb.database}');
      return openDb;
    } catch (e) {
      print('Error initializing database: $e');
      rethrow; // rethrow the error to see the full stack trace
    }
  }

  Future<void> _createDatabaseTables(Database db) async {
    tablequery.createOtherTable(db);
  }

// create other table

  // Future<void> _createOtherTable(Database db) async {
  //   _createTable(db, 'research_status', 'status_name');
  // }

  // Future<void> _createTable(
  //     Database db, String tableName, String fieldName) async {
  //   var tableExists = await _isTableExists(db, tableName);
  //   if (!tableExists) {
  //     print('$tableName making.....');
  //     await db.execute(
  //         '''
  //    CREATE TABLE $tableName (
  //           id INTEGER PRIMARY KEY AUTOINCREMENT,
  //           accountId TEXT,
  //           createdAt TEXT,
  //           createdBy TEXT,
  //           updatedAt TEXT,
  //           updatedBy TEXT,
  //           extn1 TEXT,
  //           extn2 TEXT,
  //           extn3 TEXT,
  //           extn4 TEXT,
  //           extn5 TEXT,
  //           extn6 TEXT,
  //           extn7 TEXT,
  //           extn8 TEXT,
  //           extn9 TEXT,
  //           extn10 TEXT,
  //           extn11 TEXT,
  //           extn12 TEXT,
  //           extn13 TEXT,
  //           extn14 TEXT,
  //           extn15 TEXT,
  //     active INTEGER,
  //     description TEXT,
  //     $fieldName TEXT
  //   )''');
  //   } else {
  //     print('$tableName table exist');
  //   }
  // }

  // Future<bool> _isTableExists(Database db, String tableName) async {
  //   var result = await db.rawQuery(
  //     'SELECT * FROM sqlite_master WHERE type = ? AND name = ?',
  //     ['table', tableName],
  //   );
  //   return result.isNotEmpty;
  // }
}