Krezus/lib/pages/budgets/widgets/budget_comparator.dart

import 'package:fl_chart/fl_chart.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:intl/intl.dart';
import 'package:tunas/domains/budget/budget_bloc.dart';
import 'package:tunas/pages/common/titled_container.dart';
import 'package:tunas/repositories/metadata/models/budget.dart';

class BudgetComparator extends StatelessWidget {
  const BudgetComparator({super.key});

  List<RadarDataSet> _computeDataSet(BuildContext context, List<Budget> targetBudgets, List<Budget> realBudgets) {
    RadarDataSet targetDataSet = RadarDataSet(
      fillColor: Theme.of(context).colorScheme.primary.withAlpha(100),
      borderColor: Theme.of(context).colorScheme.primary,
      entryRadius: 5,
      dataEntries: targetBudgets.map((budget) => RadarEntry(value: budget.value)).toList(),
    );
    if (realBudgets.isNotEmpty) {
      targetDataSet.dataEntries.add(const RadarEntry(value: 0));
    }
    RadarDataSet realDataSet = RadarDataSet(
      fillColor: Theme.of(context).colorScheme.onPrimary.withAlpha(100),
      borderColor: Theme.of(context).colorScheme.onPrimary,
      entryRadius: 8,
      dataEntries: realBudgets.map((budget) => RadarEntry(value: budget.value)).toList(),
    );
    return realBudgets.isEmpty ? [RadarDataSet(dataEntries: [const RadarEntry(value: 1), const RadarEntry(value: 2), const RadarEntry(value: 3)])] : [realDataSet, targetDataSet];
  }

  RadarChartTitle _computeDataSetTitle(int index, List<Budget> realBudgets) {
    return realBudgets.isEmpty ? const RadarChartTitle(text: 'No data') : RadarChartTitle(text: realBudgets[index].label);
  }

  List<Widget> _computeOtherBudgets(BuildContext context, List<Budget> otherBudgets) {
    List<Widget> list = [
      const Text('Hors budget'),
      Container(
        margin: const EdgeInsets.only(bottom: 10),
        decoration: BoxDecoration(
          border: Border(
            bottom: BorderSide(
              width: 2,
              color: Theme.of(context).colorScheme.onPrimaryContainer
            )
          )
        ),
      )
    ];

    list.addAll(otherBudgets.map((budget) => Row(
      mainAxisAlignment: MainAxisAlignment.spaceBetween,
      children: [
        Row(
          children: [
            Container(width: 5),
            Text(budget.label),
          ],
        ),
        Text(
          NumberFormat("#00 €").format(budget.value.abs()),
          style: const TextStyle(
            fontFamily: 'NovaMono',
          )
        )
      ],
    )));
    return list;
  }

  @override
  Widget build(BuildContext context) {
    return BlocBuilder<BudgetBloc, BudgetState>(
      builder: (context, state) => TitledContainer(
        title: 'Compare', 
        child: Column(
          children: [
            Row(
              mainAxisAlignment: MainAxisAlignment.end,
              children: [
                IconButton(
                  onPressed: () => context.read<BudgetBloc>().add(BudgetComparePrevious()),
                  icon: const Icon(Icons.skip_previous)
                ),
                Text('${NumberFormat('00', 'fr_FR').format(state.compareMonth)} - ${state.compareYear}'),
                IconButton(
                  onPressed: () => context.read<BudgetBloc>().add(BudgetCompareNext()),
                  icon: const Icon(Icons.skip_next)
                ),
              ],
            ),
            Row(
              children: [
                Container(
                  height: 300,
                  width: 250,
                  padding: const EdgeInsets.all(10),
                  decoration: BoxDecoration(
                    borderRadius: BorderRadius.circular(5),
                    color: Theme.of(context).colorScheme.secondaryContainer
                  ),
                  child: SingleChildScrollView(
                    scrollDirection: Axis.vertical,
                    child: Column(
                      mainAxisAlignment: MainAxisAlignment.center,
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: _computeOtherBudgets(context, state.otherBudgets),
                    ),
                  ) 
                ),
                Expanded(
                  child: AspectRatio(
                    aspectRatio: 1.3,
                    child: RadarChart(
                      RadarChartData(
                        titlePositionPercentageOffset: 0.15,
                        tickBorderData: BorderSide(color: Theme.of(context).colorScheme.secondary, width: 1),
                        gridBorderData: BorderSide(color: Theme.of(context).colorScheme.secondary, width: 2),
                        radarBorderData: BorderSide(color: Theme.of(context).colorScheme.secondary, width: 3),
                        radarBackgroundColor: Theme.of(context).colorScheme.secondaryContainer.withAlpha(100),
                        radarShape: RadarShape.circle,
                        dataSets: _computeDataSet(context, state.budgets, state.compareBudgets),
                        getTitle: (index, angle) => _computeDataSetTitle(index, state.compareBudgets),
                      )
                    ),
                  )
                ),
              ],
            )
          ],
        ),
      ),
    );
  }
}