import 'dart:math';

import 'package:easy_localization/easy_localization.dart';
import 'package:fl_chart/fl_chart.dart';
import 'package:flutter/material.dart';
import 'package:selfprivacy/logic/common_enum/common_enum.dart';
import 'package:selfprivacy/logic/models/metrics.dart';
import 'package:selfprivacy/ui/pages/server_details/charts/bottom_title.dart';
import 'package:selfprivacy/ui/pages/server_details/server_details_screen.dart';

class DiskChart extends StatelessWidget {
  const DiskChart({
    required this.diskData,
    required this.period,
    required this.start,
    super.key,
  });

  final List<DiskGraphData> diskData;
  final Period period;
  final DateTime start;

  List<FlSpot> getSpots(final List<TimeSeriesData> data) {
    var i = 0;
    final List<FlSpot> res = [];

    for (final d in data) {
      res.add(FlSpot(i.toDouble(), d.value));
      i++;
    }

    return res;
  }

  String screenReaderDescription(final BuildContext context) {
    final buffer = StringBuffer();
    buffer.write(
      'resource_chart.disk_chart_screen_reader_explanation.beginning'.tr(
        namedArgs: {
          'period': 'resource_chart.${period.name}'.tr(),
        },
      ),
    );

    for (final disk in diskData) {
      final lastData = disk.diskData.last;
      final lastValue = lastData.value;

      final firstData = disk.diskData.first;
      final firstValue = firstData.value;

      buffer.write(
        'resource_chart.disk_chart_screen_reader_explanation.disk'.tr(
          namedArgs: {
            'disk': disk.volume.displayName,
            'beginningValue': firstValue.toStringAsFixed(1),
            'endValue': lastValue.toStringAsFixed(1),
          },
        ),
      );
    }
    return buffer.toString();
  }

  @override
  Widget build(final BuildContext context) {
    final diskDataMax = [
      ...diskData.map<List<double>>(
        (final disk) => disk.diskData.map((final e) => e.value).toList(),
      ),
    ].expand((final x) => x).reduce(max);
    return Semantics(
      label: screenReaderDescription(context),
      child: LineChart(
        LineChartData(
          lineTouchData: LineTouchData(
            enabled: true,
            touchTooltipData: LineTouchTooltipData(
              getTooltipColor: (final LineBarSpot _) =>
                  Theme.of(context).colorScheme.surface,
              tooltipPadding: const EdgeInsets.all(8),
              getTooltipItems: (final List<LineBarSpot> touchedBarSpots) {
                final List<LineTooltipItem> res = [];

                bool timeShown = false;
                for (final spot in touchedBarSpots) {
                  final value = spot.y;
                  final date = diskData.first.diskData[spot.x.toInt()].time;

                  res.add(
                    LineTooltipItem(
                      '${timeShown ? '' : DateFormat('HH:mm dd.MM.yyyy').format(date)} ${diskData[spot.barIndex].volume.displayName} ${value.toInt()}%',
                      TextStyle(
                        color: Theme.of(context).colorScheme.onSurface,
                        fontWeight: FontWeight.bold,
                      ),
                    ),
                  );

                  timeShown = true;
                }

                return res;
              },
            ),
          ),
          lineBarsData: diskData
              .map<LineChartBarData>(
                (final disk) => LineChartBarData(
                  spots: getSpots(disk.diskData),
                  isCurved: false,
                  barWidth: 2,
                  color: disk.color,
                  dotData: const FlDotData(
                    show: false,
                  ),
                  belowBarData: BarAreaData(
                    show: true,
                    gradient: LinearGradient(
                      colors: [
                        disk.color.withOpacity(0.5),
                        disk.color.withOpacity(0.0),
                      ],
                      begin: Alignment.bottomCenter,
                      end: Alignment.topCenter,
                    ),
                  ),
                ),
              )
              .toList(),
          minY: 0,
          maxY: 100,
          minX: 0,
          titlesData: FlTitlesData(
            topTitles: const AxisTitles(
              sideTitles: SideTitles(showTitles: false),
            ),
            bottomTitles: AxisTitles(
              sideTitles: SideTitles(
                interval: 40,
                reservedSize: 30,
                getTitlesWidget: (final value, final titleMeta) => Padding(
                  padding: const EdgeInsets.all(8.0),
                  child: ExcludeSemantics(
                    child: Text(
                      bottomTitle(
                        value.toInt(),
                        diskData.first.diskData,
                        period,
                      ),
                      style: Theme.of(context).textTheme.labelSmall?.copyWith(
                            color:
                                Theme.of(context).colorScheme.onSurfaceVariant,
                          ),
                    ),
                  ),
                ),
                showTitles: true,
              ),
            ),
            leftTitles: const AxisTitles(
              sideTitles: SideTitles(showTitles: false),
            ),
            rightTitles: const AxisTitles(
              sideTitles: SideTitles(
                showTitles: false,
              ),
            ),
          ),
          gridData: FlGridData(
            show: true,
            drawVerticalLine: true,
            verticalInterval: 40,
            horizontalInterval: diskDataMax * 2 / 6.5,
            getDrawingHorizontalLine: (final value) => FlLine(
              color: Theme.of(context).colorScheme.outline.withOpacity(0.3),
              strokeWidth: 1,
            ),
            getDrawingVerticalLine: (final value) => FlLine(
              color: Theme.of(context).colorScheme.outline.withOpacity(0.3),
              strokeWidth: 1,
            ),
          ),
          borderData: FlBorderData(
            show: true,
            border: Border(
              bottom: BorderSide(
                color: Theme.of(context).colorScheme.outline.withOpacity(0.3),
                width: 1,
              ),
              left: BorderSide(
                color: Theme.of(context).colorScheme.outline.withOpacity(0.3),
                width: 1,
              ),
              right: BorderSide(
                color: Theme.of(context).colorScheme.outline.withOpacity(0.3),
                width: 1,
              ),
              top: BorderSide(
                color: Theme.of(context).colorScheme.outline.withOpacity(0.3),
                width: 1,
              ),
            ),
          ),
        ),
      ),
    );
  }

  bool checkToShowTitle(
    final double minValue,
    final double maxValue,
    final SideTitles sideTitles,
    final double appliedInterval,
    final double value,
  ) {
    if (value < 0) {
      return false;
    } else if (value == 0) {
      return true;
    }

    final diff = value - minValue;
    final finalValue = diff / 20;
    return finalValue - finalValue.floor() == 0;
  }
}