import 'package:drift/drift.dart';

import 'enums.dart';
import 'tables.dart';

part 'database.g.dart';

/// The encrypted local inventory database (SQLCipher via an injected executor).
///
/// The executor is passed in so production wires SQLCipher while tests can use
/// an in-memory database — the schema and queries are identical either way.
@DriftDatabase(
  tables: [
    Varieties,
    VarietyVernacularNames,
    Species,
    SpeciesCommonNames,
    Lots,
    GerminationTests,
    Movements,
    Parties,
    Attachments,
    ExternalLinks,
  ],
)
class AppDatabase extends _$AppDatabase {
  AppDatabase(super.e);

  /// Current schema version; also stamped into interchange exports so an
  /// importer knows which app generation wrote the file (data-model §7).
  static const int currentSchemaVersion = 5;

  @override
  int get schemaVersion => currentSchemaVersion;

  @override
  MigrationStrategy get migration => MigrationStrategy(
    onCreate: (m) async => m.createAll(),
    onUpgrade: (m, from, to) async {
      // v2: lots can hold seeds or living plant material.
      if (from < 2) {
        await m.addColumn(lots, lots.type);
      }
      // v3: optional harvest month alongside the harvest year.
      if (from < 3) {
        await m.addColumn(lots, lots.harvestMonth);
      }
      // v4: optional packaging/supply form for living lots.
      if (from < 4) {
        await m.addColumn(lots, lots.presentation);
      }
      // v5: display order for attachments (cover photo = lowest sortOrder).
      if (from < 5) {
        await m.addColumn(attachments, attachments.sortOrder);
      }
    },
  );
}