kent_logistics_app/lib/widgets/primary_button.dart

import 'package:flutter/material.dart';

class PrimaryButton extends StatelessWidget {
  final String label;
  final VoidCallback onTap;
  final bool busy;

  const PrimaryButton({
    super.key,
    required this.label,
    required this.onTap,
    this.busy = false,
  });

  @override
  Widget build(BuildContext context) {
    return SizedBox(
      width: double.infinity,

      child: Container(
        decoration: BoxDecoration(
          gradient: const LinearGradient(
            colors: [
              Color(0xFF0D47A1), // Blue
              Color(0xFF6A1B9A), // Purple
            ],
            begin: Alignment.topLeft,
            end: Alignment.bottomRight,
          ),
          borderRadius: BorderRadius.circular(12),
        ),

        child: ElevatedButton(
          onPressed: busy ? null : onTap,
          style: ElevatedButton.styleFrom(
            backgroundColor: Colors
                .transparent, // IMPORTANT: keep transparent to see gradient
            shadowColor: Colors.transparent,
            padding: const EdgeInsets.symmetric(vertical: 14),
            shape: RoundedRectangleBorder(
              borderRadius: BorderRadius.circular(12),
            ),
          ),

          child: busy
              ? const SizedBox(
            height: 18,
            width: 18,
            child: CircularProgressIndicator(
              strokeWidth: 2,
              color: Colors.white,
            ),
          )
              : Text(
            label,
            style: const TextStyle(fontSize: 16, color: Colors.white),
          ),
        ),
      ),
    );
  }
}