import 'dart:math';

import 'package:flutter/material.dart';

import 'package:syncfusion_flutter_charts/charts.dart';

import 'package:pshared/models/payment/status.dart';
import 'package:pshared/models/payment/operation.dart';


class StatusChart extends StatelessWidget {
  final List<OperationItem> operations;

  const StatusChart({super.key, required this.operations});

  @override
  Widget build(BuildContext context) {
    // 1) Compute counts
    final counts = <OperationStatus, int>{};
    for (var op in operations) {
      counts[op.status] = (counts[op.status] ?? 0) + 1;
    }
    final items = counts.entries
        .map((e) => _ChartData(e.key, e.value.toDouble()))
        .toList();
    final maxCount = items.map((e) => e.count.toInt()).fold<int>(0, max);

    final theme = Theme.of(context);
    final barColor = theme.colorScheme.secondary;
    final caption = theme.textTheme.labelMedium;

    return SizedBox(
      height: 200,
      child: Card(
        margin: const EdgeInsets.all(16),
        elevation: 2,
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(12),
        ),
        child: Padding(
          padding: const EdgeInsets.symmetric(vertical: 16, horizontal: 8),
          child: SfCartesianChart(
            // ─── Axes ─────────────────────────────────────────
            primaryXAxis: CategoryAxis(
              labelStyle: caption,
              majorGridLines: const MajorGridLines(width: 0),
            ),
            primaryYAxis: NumericAxis(
              minimum: 0,
              maximum: (maxCount + 1).toDouble(),
              interval: 1,
              labelStyle: caption,
              majorGridLines: MajorGridLines(
                color: theme.dividerColor.withAlpha(76),
                width: 1,
                dashArray: <double>[4, 2],
              ),
            ),

            // ─── Enable tooltips ───────────────────────────────
            legend: Legend(isVisible: false),
            tooltipBehavior: TooltipBehavior(
              enable: true,
              header: '',                // omit series name in header
              format: 'point.x : point.y', // e.g. "Init : 2"
            ),

            // ─── Bar series with tooltip enabled ───────────────
            series: <ColumnSeries<_ChartData, String>>[
              ColumnSeries<_ChartData, String>(
                dataSource: items,
                xValueMapper: (d, _) => d.status.localized(context),
                yValueMapper: (d, _) => d.count,
                color: barColor,
                width: 0.6,
                borderRadius: const BorderRadius.all(Radius.circular(4)),
                enableTooltip: true,  // <— turn on for this series
              ),
            ],
          ),
        ),
      ),
    );
  }
}

class _ChartData {
  final OperationStatus status;
  final double count;
  _ChartData(this.status, this.count);
}