Flutter-Ernaehrungsapp/lib/android/pages/nav_pages/progress_page.dart

import 'package:ernaehrung/android/components/meal_page_text/secondary_big_text_component.dart';
import 'package:ernaehrung/android/components/meal_page_text/secondary_text_component.dart';
import 'package:ernaehrung/android/components/meal_page_text/title_component.dart';
import 'package:ernaehrung/android/config/statistics.dart';
import 'package:fl_chart/fl_chart.dart';
import 'package:flutter/material.dart';

import '../../config/format_helper.dart';

class ProgressPage extends StatelessWidget {
  final String title;
  final Color backgroundColor = const Color(0xff47a44b);

  const ProgressPage({Key? key, required this.title}) : super(key: key);

  String get getTitle => title;

  @override
  String toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) {
    return getTitle;
  }

  /*
  * TODO: in versch. Dateien auslagern, damit der Code nicht voll gemüllt wird
  * */
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: SingleChildScrollView(
        child: Padding(
          padding: const EdgeInsets.symmetric(vertical: 16, horizontal: 8),
          child: Column(
            children: [
              ValueListenableBuilder(
                valueListenable: StatisticsService.instance.dailyAverageForCurrentWeek,
                builder: (context, value, child) {
                  return Container(
                    height: 100,
                    width: 400,
                    decoration: BoxDecoration(
                      border: Border.all(),
                    ),
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        const TitleComponent("Kalorien"),
                        const SizedBox(
                          height: 10,
                        ),
                        const SecondaryTextComponent("Durchschnittlich"),
                        SecondaryBigTextComponent(value.toString()),
                      ],
                    ),
                  );
                },
              ),
              ValueListenableBuilder(
                valueListenable: StatisticsService.instance.barChartData,
                builder: (context, value, child) {
                  return SizedBox(
                    height: 205,
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        SizedBox(
                          height: 200,
                          child: BarChart(
                            BarChartData(
                              barTouchData: barTouchData,
                              titlesData: titlesData,
                              borderData: borderData,
                              barGroups: value,
                              gridData: FlGridData(show: false),
                              alignment: BarChartAlignment.spaceAround,
                              maxY: 200,
                            ),
                          ),
                        )
                      ],
                    ),
                  );
                },
              ),
              ValueListenableBuilder(
                valueListenable: StatisticsService.instance.weeklyCaloryRanking,
                builder: (context, value, child) {
                  return Column(
                    //TODO: Loop through the values and display them dynamically
                    children: [
                      const TitleComponent("Lebensmittel mit dem höchsten Kaloriengehalt"),
                      const SizedBox(height: 24,),
                      for (var item in value.toSet())
                        Row(
                          mainAxisAlignment: MainAxisAlignment.spaceBetween,
                          children: [
                            SecondaryTextComponent(getWeeklyRankingString(item.name)),
                            SecondaryTextComponent(item.calories.toString()),
                          ],
                        ),
                    ],
                  );
                },
              ),
            ],
          ),
        ),
      ),
    );

  }

  BarTouchData get barTouchData => BarTouchData(
        enabled: false,
        touchTooltipData: BarTouchTooltipData(
          tooltipBgColor: Colors.transparent,
          tooltipPadding: EdgeInsets.zero,
          tooltipMargin: 4,
          getTooltipItem: (
            BarChartGroupData group,
            int groupIndex,
            BarChartRodData rod,
            int rodIndex,
          ) {
            return BarTooltipItem(
              rod.toY.round().toString(),
              const TextStyle(
                color: Colors.orange,
                fontWeight: FontWeight.bold,
              ),
            );
          },
        ),
      );

  Widget getTitles(double value, TitleMeta meta) {
    const style = TextStyle(
      color: Colors.red,
      fontWeight: FontWeight.bold,
      fontSize: 14,
    );
    String text;
    switch (value.toInt()) {
      case 0:
        text = 'M';
        break;
      case 1:
        text = 'T';
        break;
      case 2:
        text = 'W';
        break;
      case 3:
        text = 'T';
        break;
      case 4:
        text = 'F';
        break;
      case 5:
        text = 'S';
        break;
      case 6:
        text = 'S';
        break;
      default:
        text = '';
        break;
    }
    return SideTitleWidget(
      axisSide: meta.axisSide,
      space: 4,
      child: Text(text, style: style),
    );
  }

  FlTitlesData get titlesData => FlTitlesData(
        show: true,
        bottomTitles: AxisTitles(
          sideTitles: SideTitles(
            showTitles: true,
            reservedSize: 30,
            getTitlesWidget: getTitles,
          ),
        ),
        leftTitles: AxisTitles(
          sideTitles: SideTitles(showTitles: false),
        ),
        topTitles: AxisTitles(
          sideTitles: SideTitles(showTitles: false),
        ),
        rightTitles: AxisTitles(
          sideTitles: SideTitles(showTitles: false),
        ),
      );

  FlBorderData get borderData => FlBorderData(
        show: false,
      );

  LinearGradient get _barsGradient => const LinearGradient(
        colors: [
          Colors.cyan,
          Colors.deepPurple,
        ],
        begin: Alignment.bottomCenter,
        end: Alignment.topCenter,
      );
  LinearGradient get _breakfastGradient => const LinearGradient(
    colors: [
      Colors.green,
      Colors.yellow,
    ],
    begin: Alignment.bottomCenter,
    end: Alignment.topCenter,
  );

}