import 'package:fl_chart/fl_chart.dart';
import 'package:flutter/material.dart';
import 'package:graphql/client.dart';
import 'package:tstor_ui/api/client.dart';
import 'package:tstor_ui/api/torrent_stats.graphql.dart';

class TorrentStatsScreen extends StatefulWidget {
  const TorrentStatsScreen({super.key});

  @override
  State<TorrentStatsScreen> createState() => _TorrentStatsScreenState();
}

class _TorrentStatsScreenState extends State<TorrentStatsScreen> {
  Future<LineChartData> _totalStats() async {
    final since = DateTime.now().subtract(Duration(hours: 1));
    final data = await client.query$TorrentTotalStats(
      Options$Query$TorrentTotalStats(
        variables: Variables$Query$TorrentTotalStats(
          since: since,
        ),
        fetchPolicy: FetchPolicy.networkOnly,
      ),
    );

    return LineChartData(
      lineBarsData: [
        LineChartBarData(
          spots: data.parsedData!.torrentDaemon!.statsHistory
              .map(
                (e) => FlSpot(
                  since.difference(e.timestamp).inSeconds.toDouble(),
                  e.activePeers.toDouble(),
                ),
              )
              .toList(),
        ),
      ],
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("Torrent Stats"),
      ),
      body: FutureBuilder(
        future: _totalStats(),
        builder: (context, snapshot) {
          if (!snapshot.hasData) {
            return const Center(
              child: CircularProgressIndicator(),
            );
          }

          return LineChart(snapshot.data!);
        },
      ),
    );
  }
}