import 'package:flutter/material.dart';
import 'package:seller_app/prodonsale.dart';
import 'package:seller_app/product.dart';
import 'package:seller_app/video.dart';
import 'package:seller_app/class.dart';
import 'package:seller_app/about.dart';


class navigationbar extends StatefulWidget {
  @override
  _navigationbarState createState() => _navigationbarState();
}

class _navigationbarState extends State<navigationbar> {
    final List<Widget> pages = [
    Prodonsale(
      key: PageStorageKey('Page1'),
    ),
    Product(
      key: PageStorageKey('Page2'),
    ),
    Video(
      key: PageStorageKey('Page3'),
    ),

];
final PageStorageBucket bucket = PageStorageBucket();

int _selectedIndex = 0;

  Widget _bottomNavigationBar(int selectedIndex) => BottomNavigationBar(
        onTap: (int index) => setState(() => _selectedIndex = index),
        currentIndex: selectedIndex,
        items: const <BottomNavigationBarItem>[
          BottomNavigationBarItem(
              icon: Icon(Icons.account_box), title: Text('My Products')),
          BottomNavigationBarItem(
              icon: Icon(Icons.store), title: Text('Sell Craft')),
          BottomNavigationBarItem(
              icon: Icon(Icons.video_library), title: Text('Sell Tutorials')),
        ],
);

  void choiceAction(String choice){
    if(choice == Constants.About){
        Navigator.push(context, MaterialPageRoute(
                    builder: (BuildContext context) =>  About()
                  ));
    }
    else if(choice == Constants.SignOut){
      Navigator.pop(context);
    }
}
  @override
  Widget build(BuildContext context) {
 return Scaffold(
            appBar: new AppBar(
              leading: new Container(),
        title: new Text("Craft House"),
        backgroundColor: Colors.red,
        actions: <Widget>[
          PopupMenuButton<String>(
            onSelected: choiceAction,
            itemBuilder: (BuildContext context){
              return Constants.choices.map((String choice){
                return PopupMenuItem<String>(
                  value: choice,
                  child: Text(choice),
                );
              }).toList();
            },
          )
        ],
),
      bottomNavigationBar: _bottomNavigationBar(_selectedIndex),
      body: PageStorage(
        child: pages[_selectedIndex],
        bucket: bucket,
      ),
);

  }
}