import 'package:flutter/material.dart';
import 'package:skywood/main/lib_file.dart';
import 'package:skywood/utils/tools/widgets/sky_common_widget.dart';

import '../help_nav.dart';


class SkyAppBar extends StatelessWidget implements PreferredSizeWidget {
  const SkyAppBar({
    super.key,
    this.title,
    this.titleWidget,
    this.leading,
    this.actions,
    this.onBack,
    this.showBackButton = true,
    this.centerTitle = true,
    this.backgroundColor = Colors.white,
    this.foregroundColor,
    this.elevation = 0,
    this.bottom,
    this.toolbarHeight = kToolbarHeight,
    this.titleColor,
  });

  final String? title;
  final Color? titleColor;
  final Widget? titleWidget;
  final Widget? leading;
  final List<Widget>? actions;
  final VoidCallback? onBack;
  final bool showBackButton;
  final bool centerTitle;
  final Color? backgroundColor;
  final Color? foregroundColor;
  final double elevation;
  final PreferredSizeWidget? bottom;
  final double toolbarHeight;

  @override
  Size get preferredSize =>
      Size.fromHeight(toolbarHeight + (bottom?.preferredSize.height ?? 0));

  @override
  Widget build(BuildContext context) {

    return _buildNormalAppBar(context);
  }

  PreferredSizeWidget _buildNormalAppBar(BuildContext context) {

    final canPop = Navigator.of(context).canPop();

    Widget? resolvedLeading = leading;
    if (resolvedLeading == null && showBackButton && canPop) {
      resolvedLeading = IconButton(
        icon: HelpImg.asset(ConstImg.back, width: 32),
        onPressed: onBack ?? () => HelpNav.back(),
      );
    }

    return AppBar(
      title: titleWidget ?? (title != null
          ? SkyText(text: title!, fontSize: 18, fontWeight: FontWeight.bold, color: titleColor)
          : null),
      leading: resolvedLeading,
      actions: actions,
      centerTitle: centerTitle,
      backgroundColor: backgroundColor,
      foregroundColor: foregroundColor,
      elevation: elevation,
      scrolledUnderElevation: 0,
      toolbarHeight: toolbarHeight,
    );
  }


}