import 'package:flutter/material.dart';

/// Consistent AppBar builder for TracPulse screens.
///
/// Reads base styles (backgroundColor, elevation) from the current
/// [ThemeData.appBarTheme], then applies TracPulse's standard back button
/// and title styling on top.
///
/// Parameters:
/// - [title] – App bar title text (left-aligned, monospace, 14px, weight 700, letter-spacing 2)
/// - [actions] – optional list of action [IconButton]s placed on the right
/// - [onTitleTap] – optional callback when the title is tapped (e.g. Easter egg)
AppBar buildTracPulseAppBar({
  required String title,
  List<Widget>? actions,
  VoidCallback? onTitleTap,
}) {
  return AppBar(
    // Inherit backgroundColor, elevation from theme (defined once in MaterialApp.appBarTheme)
    automaticallyImplyLeading: true,
    actions: actions,
    title: onTitleTap != null
        ? GestureDetector(
            onTap: onTitleTap,
            child: Text(
              title,
              style: const TextStyle(
                fontFamily: 'monospace',
                fontSize: 14,
                fontWeight: FontWeight.w700,
                letterSpacing: 2,
                color: Color(0xFFe0e0e0),
              ),
            ),
          )
        : Text(
            title,
            style: const TextStyle(
              fontFamily: 'monospace',
              fontSize: 14,
              fontWeight: FontWeight.w700,
              letterSpacing: 2,
              color: Color(0xFFe0e0e0),
            ),
          ),
    // Consistent back button: #9e9e9e, size 20 (distinct from title #e0e0e0)
    leading: Builder(
      builder: (context) => IconButton(
        icon: const Icon(Icons.arrow_back, color: Color(0xFF9e9e9e), size: 20),
        onPressed: () => Navigator.pop(context),
      ),
    ),
    leadingWidth: 48,
  );
}