import 'package:ctjt_flutter/common/styles.dart';
import 'package:ctjt_flutter/widget/button.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';

/* ---------------------------------页面内标题-------------------------------- */
class PageTitle extends StatelessWidget {
  static var _defaultPadding = EdgeInsets.only(
      top: 75.h, bottom: 75.h);

  PageTitle({Key? key, required this.text, this.padding}) : super(key: key);

  final String text;
  final EdgeInsetsGeometry? padding;

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: null == this.padding ? _defaultPadding : this.padding!,
      child: Text(this.text, style: Styles.titleStyle),
    );
  }
}

/* ----------------------------------状态栏---------------------------------- */
// 预设的几种常见左上角按钮类型枚举
enum LeadingType { Back, Menu, None }

class PageHead extends StatelessWidget implements PreferredSizeWidget {
  static var _defaultSize = Size.fromHeight(125.h);

  PageHead(
      {Key? key, this.leadingType = LeadingType.Back, this.leading, this.title})
      : super(key: key);

  final LeadingType leadingType;
  final Widget? leading;
  final Widget? title;

  @override
  Widget build(BuildContext context) {
    Widget? leading;
    if (null != this.leading) {
      leading = this.leading!;
    } else {
      switch (this.leadingType) {
        case LeadingType.Menu:
          {
            leading = IButton(
                iconSize: Styles.iconBigSize!,
                icon: const Icon(Icons.menu, color: Styles.primaryColor),
                onPressed: () {
                  Scaffold.of(context).openDrawer();
                });
          }
          break;
        case LeadingType.Back:
          {
            leading = IButton(
                iconSize: Styles.iconBigSize!,
                icon: const Icon(Icons.arrow_back_ios,
                    color: Styles.primaryColor),
                onPressed: () {
                  Navigator.of(context).pop();
                });
          }
          break;
        default:
          break;
      }
    }
    return PreferredSize(
      // 设定状态栏大小的容器
      child: AppBar(
        centerTitle: true,
        leading: leading,
        title: this.title,
        elevation: 0,
        systemOverlayStyle:
            SystemUiOverlayStyle(statusBarBrightness: Brightness.light),
        // 是否夜览
        backgroundColor: Colors.transparent, // 状态栏设置为透明底色
      ),
      preferredSize: _defaultSize,
    );
  }

  @override
  Size get preferredSize => _defaultSize;
}