import 'dart:io';

import 'package:drift/drift.dart';
import 'package:drift/native.dart';
import 'package:path/path.dart' as p;
import 'package:path_provider/path_provider.dart';

part 'app_database.g.dart';

/// Persistenz fuer Missionen (Architektur-Doku 4.15): Drift statt Hive, weil
/// indexierte Abfragen (Suche nach Name/Ort/Datum) benoetigt werden und das
/// Schema kompatibel zu einem kuenftigen lokal-first Server-Sync-Muster
/// (Dirty-Flags, Server-IDs) bleiben soll.
class Missions extends Table {
  IntColumn get id => integer().autoIncrement()();
  TextColumn get name => text()();
  TextColumn get location => text().nullable()();
  DateTimeColumn get createdAt =>
      dateTime().withDefault(currentDateAndTime)();
  TextColumn get waypointsJson => text()();
  BoolColumn get isDirty => boolean().withDefault(const Constant(true))();
  TextColumn get serverId => text().nullable()();
}

@DriftDatabase(tables: [Missions])
class AppDatabase extends _$AppDatabase {
  AppDatabase() : super(_openConnection());

  @override
  int get schemaVersion => 1;

  static LazyDatabase _openConnection() {
    return LazyDatabase(() async {
      final dbFolder = await getApplicationDocumentsDirectory();
      final file = File(p.join(dbFolder.path, 'dmc_missions.sqlite'));
      return NativeDatabase.createInBackground(file);
    });
  }
}