counters/lib/values_page.dart

import 'package:counters/counters.dart';
import 'package:counters/datbase.dart';
import 'package:counters/new_value_page.dart';
import 'package:counters/value.dart';
import 'package:flutter/material.dart';
import 'package:flutter_gen/gen_l10n/app_localizations.dart';
import 'package:intl/intl.dart';

class ValuesPage extends StatefulWidget {
  const ValuesPage({super.key, required this.counter});

  final Counter counter;

  @override
  State<ValuesPage> createState() => _ValuesPageState();
}

class _ValuesPageState extends State<ValuesPage> {
  @override
  Widget build(BuildContext context) {
    var values = DBProvider.db.getValuesOfCounter(widget.counter);
    return Scaffold(
        appBar: AppBar(
            backgroundColor: Theme.of(context).colorScheme.inversePrimary,
            title: Text(AppLocalizations.of(context)!.app_title)),
        body: Center(
          child: FutureBuilder(
            future: values,
            builder: (context, snapshot) {
              if (snapshot.hasData && snapshot.data!.isNotEmpty) {
                return ValuesListView(
                    counter: widget.counter,
                    values: snapshot.data!.reversed.toList());
              }

              return Text(AppLocalizations.of(context)!.empty_values_list);
            },
          ),
        ),
        floatingActionButton: FloatingActionButton(
          onPressed: () {
            Navigator.push(
                    context,
                    MaterialPageRoute(
                        builder: (context) =>
                            NewValuePage.forCounter(counter: widget.counter)))
                .then((_) => setState(() {}));
          },
          tooltip: AppLocalizations.of(context)!.add_new_counter_tooltip,
          child: const Icon(Icons.add),
        ));
  }
}

class ValuesListView extends StatelessWidget {
  ValuesListView({
    super.key,
    required this.values,
    required this.counter,
  });

  final List<Value> values;
  final Counter counter;
  final dataFormat = DateFormat("dd-MM-yyyy");

  @override
  Widget build(BuildContext context) {
    return ListView.builder(
      itemCount: values.length,
      itemBuilder: (context, index) {
        var units = counter.counterType.getUnits().getLabel(context);
        var valueWidgets = List<Widget>.empty(growable: true);
        valueWidgets.add(Text("T1 - ${values[index].value1} $units"));
        var sum = values[index].value1;
        var value = values[index];
        if (value.value2 != null &&
            counter.counterType.id > CounterType.electrisity1rates.id) {
          valueWidgets.add(Text("T2 - ${value.value2} $units"));
          sum += value.value2!;
        }
        if (value.value3 != null &&
            counter.counterType.id > CounterType.electrisity2rates.id) {
          valueWidgets.add(Text("T3 - ${value.value3} $units"));
          sum += value.value3!;
        }

        if (valueWidgets.length > 1) {
          valueWidgets.add(Text("Итого - $sum $units"));
        }
        return Padding(
          padding: const EdgeInsets.only(left: 8.0, right: 8.0),
          child: Card(
              child: Align(
            alignment: Alignment.centerLeft,
            child: Padding(
              padding: const EdgeInsets.all(8.0),
              child: Column(
                mainAxisAlignment: MainAxisAlignment.start,
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Row(
                    children: [
                      Text(dataFormat.format(value.date.toLocal())),
                      Text(' ${AppLocalizations.of(context)!.values}:'),
                    ],
                  ),
                  Column(
                    crossAxisAlignment: CrossAxisAlignment.end,
                    children: valueWidgets,
                  )
                ],
              ),
            ),
          )),
        );
      },
    );
  }
}