import 'package:flutter/material.dart';

///自定义按钮
///包括loading功能
class CustomButton extends StatelessWidget {
  final Widget child;
  final VoidCallback? onPressed;
  final bool loading;
  final bool round;
  final bool disabled;

  const CustomButton({
    super.key,
    required this.child,
    this.onPressed,
    this.loading = false,
    this.round = true,
    this.disabled = false,
  });

  @override
  Widget build(BuildContext context) {
    ///自定义颜色
    // switch (size) {
    //   case ButtonSize.small:
    //     height = 28;
    //     loadingSize = 16;
    //     fontSize = 12;
    //     padding = const EdgeInsets.symmetric(horizontal: 12);
    //     break;
    //   case ButtonSize.large:
    //     height = 48;
    //     loadingSize = 24;
    //     fontSize = 18;
    //     padding = const EdgeInsets.symmetric(horizontal: 20);
    //     break;
    //   case ButtonSize.medium:
    //     height = 45;
    //     loadingSize = 15;
    //     fontSize = 16;
    //     padding = const EdgeInsets.symmetric(horizontal: 16);
    //     break;
    // }

    void handClick() {
      if (!loading && !disabled) {
        onPressed?.call();
      }
    }

    return Opacity(
      opacity: disabled ? 0.5 : 1,
      child: ElevatedButton(
        onPressed: handClick,
        style: ElevatedButton.styleFrom(
          shape: round
              ? const StadiumBorder()
              : RoundedRectangleBorder(
                  borderRadius: BorderRadius.circular(10),
                ),
        ),
        child: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Visibility(
              visible: loading,
              child: Container(
                margin: EdgeInsets.only(right: 8),
                child: SizedBox.square(
                  dimension: 15,
                  child: CircularProgressIndicator(
                    color: Colors.white,
                    strokeWidth: 2,
                  ),
                ),
              ),
            ),
            child,
          ],
        ),
      ),
    );
  }
}