import 'package:fcs/domain/entities/package.dart';
import 'package:fcs/helpers/theme.dart';
import 'package:fcs/pages/package/model/package_model.dart';
import 'package:fcs/pages/package/package_info.dart';
import 'package:fcs/pages/package/package_list_row.dart';
import 'package:fcs/pages/package_search/package_serach.dart';
import 'package:fcs/pages/widgets/bottom_up_page_route.dart';
import 'package:fcs/pages/widgets/local_popup_menu_button.dart';
import 'package:fcs/pages/widgets/local_popupmenu.dart';
import 'package:fcs/pages/widgets/local_text.dart';
import 'package:fcs/pages/widgets/progress.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';

class PackageList extends StatefulWidget {
  final bool onlyFcs;

  const PackageList({Key key, this.onlyFcs = false}) : super(key: key);
  @override
  _PackageListState createState() => _PackageListState();
}

class _PackageListState extends State<PackageList> {
  bool _isLoading = false;
  bool _showDelivered = false;
  var _controller = ScrollController();

  @override
  void initState() {
    super.initState();
    Provider.of<PackageModel>(context, listen: false).initDeliveredPackages();
    _controller.addListener(() {
      if (_showDelivered &&
          _controller.position.pixels == _controller.position.maxScrollExtent) {
        Provider.of<PackageModel>(context, listen: false)
            .loadMoreDeliveredPackages();
      }
    });
  }

  @override
  void dispose() {
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    var packageModel = Provider.of<PackageModel>(context);
    bool onlyFcs = widget.onlyFcs;
    var packages = _showDelivered
        ? packageModel.deliveredPackages
        : onlyFcs ? packageModel.packages : packageModel.customerPackages;
    final popupMenu = LocalPopupMenuButton(
      popmenus: [
        LocalPopupMenu(
            id: 1, textKey: "package.popupmenu.active", selected: true),
        LocalPopupMenu(id: 2, textKey: "package.popupmenu.delivered")
      ],
      popupMenuCallback: (p) => this.setState(() {
        _showDelivered = p.id == 2;
      }),
    );

    return LocalProgress(
      inAsyncCall: _isLoading,
      child: Scaffold(
          appBar: AppBar(
            centerTitle: true,
            leading: new IconButton(
              icon: new Icon(CupertinoIcons.back),
              onPressed: () => Navigator.of(context).pop(),
            ),
            backgroundColor: primaryColor,
            title: LocalText(
              context,
              "package.title",
              fontSize: 20,
              color: Colors.white,
            ),
            actions: <Widget>[
              onlyFcs
                  ? IconButton(
                      icon: Icon(
                        Icons.search,
                        color: Colors.white,
                      ),
                      iconSize: 30,
                      onPressed: () => searchPackage(context,
                          callbackPackageSelect: _searchCallback),
                    )
                  : Container(),
              popupMenu
            ],
          ),
          body: Column(
            children: [
              Expanded(
                child: ListView.separated(
                    controller: _controller,
                    separatorBuilder: (context, index) => Divider(
                          color: Colors.black,
                        ),
                    scrollDirection: Axis.vertical,
                    padding: EdgeInsets.only(top: 15),
                    shrinkWrap: true,
                    itemCount: packages.length,
                    itemBuilder: (BuildContext context, int index) {
                      return PackageListRow(
                        key: ValueKey(packages[index].id),
                        package: packages[index],
                      );
                    }),
              ),
              packageModel.isLoading
                  ? Container(
                      padding: EdgeInsets.all(8),
                      color: primaryColor,
                      child: Row(
                        mainAxisAlignment: MainAxisAlignment.center,
                        children: [
                          Text("Loading...",
                              style: TextStyle(color: Colors.white)),
                        ],
                      ),
                    )
                  : Container(),
            ],
          )),
    );
  }

  _searchCallback(Package package) async {
    var packageModel = Provider.of<PackageModel>(context, listen: false);
    Package _package = await packageModel.getPackage(package.id);
    if (_package == null) return;
    Navigator.push(
      context,
      BottomUpPageRoute(PackageInfo(package: _package)),
    );
  }
}