import 'package:flutter/material.dart';

///按钮式单选框组
class VSelectBoxButtonGroup<T, TValue> extends StatefulWidget {
  final List<T> source;
  final TValue? value;
  final String Function(T data) labelGetter;
  final TValue Function(T data) valueGetter;
  final ValueChanged<TValue?>? onChanged;
  final double? itemWidth;
  const VSelectBoxButtonGroup({
    super.key,
    required this.source,
    this.value,
    required this.labelGetter,
    required this.valueGetter,
    this.onChanged,
    this.itemWidth,
  });

  @override
  State<StatefulWidget> createState() => _VSelectBoxGroupState<T, TValue>();
}

class _VSelectBoxGroupState<T, TValue>
    extends State<VSelectBoxButtonGroup<T, TValue>> {
  late TValue? _selectedValue;
  @override
  void initState() {
    _selectedValue = widget.value;
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    final children = <Widget>[];
    final length = widget.source.length;
    for (var i = 0; i < length; i++) {
      final e = widget.source[i];
      final value = widget.valueGetter(e);
      final isSelect = _selectedValue == value;
      children.add(VSelectBoxButton(
          // key: UniqueKey(),
          label: widget.labelGetter(e),
          isSelected: isSelect,
          onChanged: (status) {
            setState(() {
              if (status) {
                _onChanged(value);
              } else {
                _onChanged(null);
              }
            });
          }));
    }
    return Wrap(
      spacing: 12,
      runSpacing: 8,
      children: children,
    );
  }

  void _onChanged(TValue? value) {
    _selectedValue = value;
    widget.onChanged?.call(_selectedValue);
  }
}

class VSelectBoxButton extends StatefulWidget {
  final String label;
  final bool? isSelected;
  final ValueChanged<bool>? onChanged;

  const VSelectBoxButton(
      {super.key,
      required this.label,
      this.isSelected,
      required this.onChanged});

  @override
  State<StatefulWidget> createState() => _VSelectBoxState();
}

class _VSelectBoxState extends State<VSelectBoxButton> {
  bool _isSelected = false;
  @override
  void initState() {
    if (widget.isSelected != null) {
      _isSelected = widget.isSelected!;
    }
    super.initState();
  }


  @override
  void didUpdateWidget(covariant VSelectBoxButton oldWidget) {
    _isSelected=widget.isSelected==true;
    super.didUpdateWidget(oldWidget);
  }

  @override
  Widget build(BuildContext context) {
    const height = 56.0;
    const borderRadius = height / 2;
    final primaryColor = Theme.of(context).primaryColor;
    return Material(
      child: Ink(
        child: InkWell(
          borderRadius: BorderRadius.circular(borderRadius),
          onTap: () {
            setState(
              () {
                _isSelected = !_isSelected;
                widget.onChanged?.call(_isSelected);
              },
            );
          },
          child: Container(
            padding: const EdgeInsets.only(left: 0, right: borderRadius),
            alignment: Alignment.center,
            height: height,
            decoration: BoxDecoration(
              color: _isSelected ? primaryColor : Colors.white,
              borderRadius: BorderRadius.circular(borderRadius),
              border: _isSelected ? null : Border.all(color: primaryColor),
            ),
            child: Row(
              mainAxisSize: MainAxisSize.min,
              crossAxisAlignment: CrossAxisAlignment.center,
              children: [
                if (_isSelected) ...[
                  const Icon(
                    Icons.check_rounded,
                    color: Colors.green,
                    size: 24,
                  ),
                  const SizedBox(
                    width: 8,
                  ),
                ],
                if (!_isSelected)
                  const SizedBox(
                    width: 32,
                  ),
                Text(
                  widget.label,
                  style: TextStyle(
                      color: _isSelected ? Colors.white : primaryColor,
                      fontSize: 20),
                )
              ],
            ),
          ),
        ),
      ),
    );
  }
}