import 'package:flutter/material.dart';
import 'package:sendtrain/database/daos/sessions_dao.dart';
import 'package:sendtrain/database/database.dart';
import '../widgets/session_card.dart';

class SessionsScreen extends StatelessWidget {
  final AppDatabase database = AppDatabase();
  SessionsScreen({super.key});

  @override
  Widget build(BuildContext context) {
    return FutureBuilder<List<Session>>(
        future: SessionsDao(database).all(),
        builder: (context, snapshot) {
          if (snapshot.hasData) {
            database.close();
            final sessions = snapshot.data!;
            final pending = sessions.where((session) =>
                session.status == SessionStatus.completed ||
                session.status == SessionStatus.missed);
            final upcoming = sessions.firstWhere(
                (session) => session.status == SessionStatus.pending);
            final current = sessions.firstWhere(
                (session) => session.status == SessionStatus.started);

            List<Widget> previousSessions = List.generate(pending.length,
                (i) => SessionCard(type: 1, session: pending.elementAt(i)));
            Widget upcomingSession = SessionCard(session: upcoming);
            Widget currentSession = SessionCard(session: current);

            database.close();

            return Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: <Widget>[
                const Padding(
                    padding: EdgeInsets.fromLTRB(15, 5, 0, 0),
                    child: Text(
                        style: TextStyle(
                            fontSize: 25, fontWeight: FontWeight.bold),
                        'Current:')),
                currentSession,
                const Padding(
                    padding: EdgeInsets.fromLTRB(15, 30, 0, 0),
                    child: Text(
                        style: TextStyle(
                            fontSize: 25, fontWeight: FontWeight.bold),
                        'Upcoming:')),
                upcomingSession,
                const Padding(
                    padding: EdgeInsets.fromLTRB(15, 30, 0, 0),
                    child: Text(
                        style: TextStyle(
                            fontSize: 25, fontWeight: FontWeight.bold),
                        'Previous:')),
                SizedBox(
                    width: double.infinity,
                    height: 160,
                    child: GridView.count(
                        padding: const EdgeInsets.fromLTRB(15, 10, 0, 0),
                        scrollDirection: Axis.horizontal,
                        crossAxisSpacing: 5,
                        mainAxisSpacing: 5,
                        crossAxisCount: 1,
                        children: previousSessions))
              ],
            );
          } else {
            return const CircularProgressIndicator();
          }
        });
  }
}