import 'dart:io';

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

part 'app_database.g.dart';

class Tasks extends Table {
  TextColumn get id => text()();
  TextColumn get title => text().withLength(min: 1, max: 500)();
  TextColumn get description => text().nullable()();
  DateTimeColumn get date => dateTime()();
  TextColumn get time => text().nullable()();
  TextColumn get priority => text().withDefault(const Constant('medium'))();
  BoolColumn get isDone => boolean().withDefault(const Constant(false))();
  DateTimeColumn get createdAt => dateTime().withDefault(currentDateAndTime)();
  DateTimeColumn get updatedAt => dateTime().withDefault(currentDateAndTime)();

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

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

  @override
  int get schemaVersion => 1;

  // Task CRUD operations
  Future<List<Task>> getTasksByDate(DateTime date) {
    final startOfDay = DateTime(date.year, date.month, date.day);
    final endOfDay = startOfDay.add(const Duration(days: 1));
    return (select(tasks)
          ..where((t) => t.date.isBiggerOrEqualValue(startOfDay))
          ..where((t) => t.date.isSmallerThanValue(endOfDay))
          ..orderBy([(t) => OrderingTerm.asc(t.priority)]))
        .get();
  }

  Future<Task?> getTaskById(String id) {
    return (select(tasks)..where((t) => t.id.equals(id))).getSingleOrNull();
  }

  Future<int> insertTask(TasksCompanion task) {
    return into(tasks).insert(task);
  }

  Future<bool> updateTask(TasksCompanion task) {
    return update(tasks).replace(task);
  }

  Future<int> deleteTaskById(String id) {
    return (delete(tasks)..where((t) => t.id.equals(id))).go();
  }

  Future<List<Task>> getAllTasks() {
    return select(tasks).get();
  }
}

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