import 'package:isar/isar.dart';
import 'package:mnemo_cards_backend/cron/task.dart';
import 'package:mnemo_cards_backend/packs/free_packs_distributor.dart';
import 'package:mnemo_cards_common_backend/mnemo_cards_common_backend.dart';

import '../main.dart';

class AddFreePacks with Task {
  final FreePacksDistributor _freePacksDistributor;

  AddFreePacks(this._freePacksDistributor);

  @override
  String get name => 'add_free_packs';

  @override
  Future<void> task() async {
    final freePacks = await _freePacksDistributor.getFreePacks();

    print('$name found ${freePacks.length} free packs');
    if (freePacks.isEmpty) {
      print('No free packs found');
      return;
    }

    final users = await isar.txn(() => isar.userModels
        .filter()
        .anyOf(freePacks, (u, f) => u.not().packs((p) => p.idEqualTo(f.id)))
        .findAll());
    print(
      'Found ${users.length} users for ${freePacks.length} free packs: ${freePacks.map((e) => e.title).join(',')}',
    );

    for (final user in users) {
      try {
        await isar.writeTxn(
          () async {
            await (user.packs..addAll(freePacks)).save();
          },
        );
      } catch (e) {
        print('$name on user ${user.id}: $e');
      }
    }
  }

  @override
  int get intervalSeconds => 600;
}