import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart' as widgets;
import 'overlay_scrollbar.dart';

class SummaryTable extends StatelessWidget {
  final List<String> keys;
  final List<int> seasonCols;
  final Map<int, double> seasonWidths;
  final Widget Function(List<int> seasons, Map<int, double> widths) buildHeader;
  final Widget Function(String key) buildRow;

  const SummaryTable({
    required this.keys,
    required this.seasonCols,
    required this.seasonWidths,
    required this.buildHeader,
    required this.buildRow,
  });

  @override
  Widget build(BuildContext context) {
    const headerHeight = 32.0;
    final tableWidth = _calcTableWidth();
    final summaryHController = ScrollController();
    final summaryVController = ScrollController();

    return LayoutBuilder(
      builder: (context, constraints) {
        return Stack(
          children: [
            Scrollbar(
              controller: summaryHController,
              child: SingleChildScrollView(
                controller: summaryHController,
                scrollDirection: Axis.horizontal,
                child: widgets.SizedBox(
                  width: tableWidth < constraints.maxWidth
                      ? constraints.maxWidth
                      : tableWidth,
                  height: constraints.maxHeight,
                  child: Column(
                    children: [
                      widgets.SizedBox(height: headerHeight, child: buildHeader(seasonCols, seasonWidths)),
                      Expanded(
                        child: Scrollbar(
                          controller: summaryVController,
                          child: ListView.separated(
                            controller: summaryVController,
                            itemCount: keys.length,
                            separatorBuilder: (_, __) => const Divider(height: 1),
                            itemBuilder: (_, i) => widgets.SizedBox(
                              height: 88,
                              child: buildRow(keys[i]),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                ),
              ),
            ),
            Positioned(
              right: 0,
              top: 0,
              bottom: 0,
              child: SizedBox(
                width: 10,
                child: AlwaysOnScrollbar(
                  controller: summaryVController,
                  axis: Axis.vertical,
                  thickness: 10,
                ),
              ),
            ),
          ],
        );
      },
    );
  }

  double _calcTableWidth() {
    double tableWidth = 360;
    for (final s in seasonCols) {
      tableWidth += 16 + (seasonWidths[s] ?? 74);
    }
    return tableWidth;
  }
}