Houshan-Basa/lib/ui/widgets/components/chart/custome_pi_chart.dart

import 'dart:math';

import 'package:fl_chart/fl_chart.dart';
import 'package:flutter/material.dart';
import 'package:hoshan/data/model/report_model.dart';
import 'package:hoshan/ui/theme/responsive.dart';
import 'package:hoshan/ui/theme/text.dart';
import 'package:hoshan/ui/widgets/components/chart/indocator.dart';

class CustomePiChart extends StatefulWidget {
  final List<Report> points;

  const CustomePiChart({super.key, required this.points});

  @override
  State<CustomePiChart> createState() => _CustomePiChartState();
}

class _CustomePiChartState extends State<CustomePiChart> {
  int touchedIndex = -1;

  bool valid = false;

  late int allPointCoinsUsage =
      widget.points.fold(0, (sum, point) => sum + (point.coinUsage ?? 0));
  Color getRandomColor(Set<Color> existingColors) {
    Random random = Random();
    Color newColor;

    do {
      newColor = Color.fromARGB(
        255, // Full opacity
        random.nextInt(256), // Red (0-255)
        random.nextInt(256), // Green (0-255)
        random.nextInt(256), // Blue (0-255)
      );
    } while (
        existingColors.contains(newColor)); // Keep generating if color exists

    existingColors.add(newColor); // Add new unique color to the set
    return newColor;
  }

  late Set<Color> usedColors = {}; // Track used colors

  late List<Color> colors = List.generate(
    widget.points.length,
    (index) => getRandomColor(usedColors),
  );
  @override
  void initState() {
    super.initState();

    for (var report in widget.points) {
      if (report.coinUsage != null && report.coinUsage! > 0) {
        valid = true;
      }
    }
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      mainAxisSize: MainAxisSize.min,
      children: [
        valid
            ? AspectRatio(
                aspectRatio: Responsive(context).isDesktop() ? 2 : 1 / 1,
                child: Stack(
                  children: [
                    PieChart(
                      PieChartData(
                        pieTouchData: PieTouchData(
                          touchCallback:
                              (FlTouchEvent event, pieTouchResponse) {
                            setState(() {
                              if (!event.isInterestedForInteractions ||
                                  pieTouchResponse == null ||
                                  pieTouchResponse.touchedSection == null) {
                                touchedIndex = -1;
                                return;
                              }
                              touchedIndex = pieTouchResponse
                                  .touchedSection!.touchedSectionIndex;
                            });
                          },
                        ),
                        borderData: FlBorderData(
                          show: false,
                        ),
                        sectionsSpace: 4,
                        centerSpaceRadius: 64,
                        sections: showingSections(),
                      ),
                    ),
                    Positioned.fill(
                        child: Center(
                      child: Text(
                        'سکه',
                        style: AppTextStyles.headline3.copyWith(
                            color: Theme.of(context).colorScheme.onSurface),
                      ),
                    ))
                  ],
                ),
              )
            : const SizedBox(
                height: 24,
              ),
        Directionality(
          textDirection: TextDirection.rtl,
          child: ListView.builder(
            itemCount: widget.points.length,
            shrinkWrap: true,
            physics: const BouncingScrollPhysics(),
            itemBuilder: (context, index) {
              return Padding(
                padding: const EdgeInsets.symmetric(vertical: 4.0),
                child: Indicator(
                  count: '${widget.points[index].messagesCount} پیام',
                  color: colors[index],
                  text: widget.points[index].date ?? '',
                  isSquare: false,
                ),
              );
            },
          ),
        ),
      ],
    );
  }

  List<PieChartSectionData> showingSections() {
    return List.generate(widget.points.length, (index) {
      final isTouched = index == touchedIndex;
      final fontSize = isTouched ? 16.0 : 12.0;
      final radius = isTouched ? 60.0 : 50.0;
      const shadows = [Shadow(color: Colors.black, blurRadius: 2)];
      final point = widget.points[index];
      return PieChartSectionData(
        color: colors[index],
        value: max((point.coinUsage! * 100) / allPointCoinsUsage, 3.5),
        radius: radius,
        title: '',
        badgeWidget: Text(
          '${point.coinUsage}',
          textDirection: TextDirection.rtl,
          textAlign: TextAlign.center,
          style: AppTextStyles.body3.copyWith(
            fontSize: fontSize,
            fontWeight: FontWeight.bold,
            color: Colors.white,
            shadows: shadows,
          ),
        ),
      );
    });
  }
}