import 'package:drift/drift.dart';
import 'package:drift_flutter/drift_flutter.dart';
import 'package:path_provider/path_provider.dart';

part 'app_database.g.dart';

@DataClassName('ProductRow')
class Products extends Table {
  TextColumn get id => text()();

  TextColumn get name => text()();

  TextColumn get category => text()();

  IntColumn get stockQuantity => integer()();

  IntColumn get lowStockThreshold => integer()();

  IntColumn get priceInCents => integer()();

  TextColumn get imagePath => text().nullable()();

  BoolColumn get active => boolean().withDefault(const Constant(true))();

  @override
  Set<Column> get primaryKey => {id};
}

@DataClassName('BarTabRow')
class BarTabs extends Table {
  TextColumn get id => text()();

  TextColumn get customerName => text()();

  TextColumn get status => text().withDefault(const Constant('open'))();

  DateTimeColumn get openedAt => dateTime()();

  DateTimeColumn get closedAt => dateTime().nullable()();

  @override
  Set<Column> get primaryKey => {id};
}

@DataClassName('TabItemRow')
class TabItems extends Table {
  TextColumn get id => text()();

  TextColumn get tabId =>
      text().references(BarTabs, #id, onDelete: KeyAction.cascade)();

  TextColumn get productId => text().references(Products, #id)();

  TextColumn get productName => text()();

  IntColumn get quantity => integer()();

  IntColumn get unitPriceInCents => integer()();

  DateTimeColumn get createdAt => dateTime()();

  @override
  Set<Column> get primaryKey => {id};
}

@DataClassName('ClosedTabsRow')
class ClosedTabs extends Table {
  TextColumn get id => text()();

  TextColumn get originalTabId => text()();

  TextColumn get customerName => text()();

  DateTimeColumn get closedAt => dateTime()();

  TextColumn get paymentMethod => text().withDefault(const Constant('cash'))();

  @override
  Set<Column> get primaryKey => {id};
}

@DataClassName('ClosedTabItemRow')
class ClosedTabItems extends Table {
  TextColumn get id => text()();

  TextColumn get closedTabId => text()();

  TextColumn get productId => text()();

  TextColumn get productName => text()();

  IntColumn get quantity => integer()();

  IntColumn get unitPriceInCents => integer()();

  @override
  Set<Column> get primaryKey => {id};
}

@DataClassName('AppSettingsRow')
class AppSettingsTable extends Table {
  @override
  String get tableName => 'app_settings';

  TextColumn get id => text()();

  BoolColumn get pinRequired => boolean().withDefault(const Constant(false))();

  TextColumn get themeMode => text().withDefault(const Constant('system'))();

  TextColumn get language => text().withDefault(const Constant('system'))();

  IntColumn get barGridRows => integer().withDefault(const Constant(3))();

  @override
  Set<Column> get primaryKey => {id};
}

@DriftDatabase(
  tables: [
    Products,
    BarTabs,
    TabItems,

    ClosedTabs,
    ClosedTabItems,

    AppSettingsTable,
  ],
)
class AppDatabase extends _$AppDatabase {
  AppDatabase([QueryExecutor? executor]) : super(executor ?? _openConnection());

  @override
  int get schemaVersion => 8;

  @override
  MigrationStrategy get migration {
    return MigrationStrategy(
      onCreate: (migrator) async {
        await migrator.createAll();
      },
      onUpgrade: (migrator, from, to) async {
        Future<bool> hasSettingsColumn(String columnName) async {
          final columns = await migrator.database
              .customSelect('PRAGMA table_info(app_settings)')
              .get();

          return columns.any((column) => column.data['name'] == columnName);
        }

        if (from < 2) {
          await migrator.createTable(barTabs);
          await migrator.createTable(tabItems);
        }

        if (from < 3) {
          await migrator.addColumn(products, products.imagePath);
        }

        if (from < 4) {
          await migrator.createTable(closedTabs);
          await migrator.createTable(closedTabItems);
        }

        if (from < 5) {
          await migrator.createTable(appSettingsTable);
        }

        if (from < 6) {
          await migrator.addColumn(closedTabs, closedTabs.paymentMethod);
        }

        if (from < 7 && !await hasSettingsColumn('language')) {
          await migrator.addColumn(appSettingsTable, appSettingsTable.language);
        }

        if (from < 8 && !await hasSettingsColumn('bar_grid_rows')) {
          await migrator.addColumn(
            appSettingsTable,
            appSettingsTable.barGridRows,
          );
        }
      },
    );
  }

  static QueryExecutor _openConnection() {
    return driftDatabase(
      name: 'kooltab',
      native: const DriftNativeOptions(
        databaseDirectory: getApplicationSupportDirectory,
      ),
    );
  }
}