import 'package:flutter/material.dart';
import 'package:flutter_svg/svg.dart';
import 'package:mobile_scanner/mobile_scanner.dart';
import 'package:seshat/domain/models/book.dart';
import 'package:seshat/ui/add_page/view_model/add_view_model.dart';
import 'package:seshat/ui/add_page/widgets/form_popup.dart';
import 'package:seshat/ui/add_page/widgets/owner_popup.dart';
import 'package:seshat/ui/add_page/widgets/confirmation_popup.dart';
import 'package:seshat/ui/core/ui/navigation_bar.dart';
import 'package:seshat/utils/result.dart';

class AddPage extends StatefulWidget {
  const AddPage({super.key, required this.viewModel});

  final AddViewModel viewModel;

  @override
  State<AddPage> createState() => _AddPageState();
}

class _AddPageState extends State<AddPage> {
  num? price;
  @override
  Widget build(BuildContext context) {
    final MobileScannerController controller = MobileScannerController(
      formats: [BarcodeFormat.ean13],
      detectionTimeoutMs: 1000,
    );

    final theme = Theme.of(context);
    // return Consumer<TabScreen>(
    // builder: (context, screen, child) {
    return Scaffold(
      bottomNavigationBar: AppNavigationBar(startIndex: 1),
      body: Stack(
        children: [
          ColoredBox(color: Colors.black),
          MobileScanner(
            controller: controller,
            onDetect: (barcodes) async {
              if (widget.viewModel.currentOwner == null) {
                ScaffoldMessenger.of(context).showSnackBar(
                  SnackBar(
                    content: Text(
                      "Attention : vous devez choisir un·e propriétaire",
                    ),
                    behavior: SnackBarBehavior.floating,
                  ),
                );
                return;
              }

              void setPrice(num newPrice) async {
                setState(() {
                  price = newPrice;
                });
              }

              Result<Book> result = await widget.viewModel.scanBook(barcodes);

              switch (result) {
                case Ok():
                  await _confirmationDialogBuilder(
                    context,
                    setPrice,
                    controller,
                    widget.viewModel,
                    result.value,
                  );
                  break;
                case Error():
                  ScaffoldMessenger.of(context).showSnackBar(
                    SnackBar(
                      content: Text("Erreur : ${result.error}"),
                      behavior: SnackBarBehavior.floating,
                    ),
                  );
                  break;
              }
            },
          ),
          SafeArea(
            child: SingleChildScrollView(
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.center,
                mainAxisSize: MainAxisSize.min,
                children: [
                  Center(
                    child: Card(
                      margin: EdgeInsets.symmetric(horizontal: 50),
                      child: Column(
                        mainAxisSize: MainAxisSize.min,
                        children: [
                          ListenableBuilder(
                            listenable: widget.viewModel,
                            builder: (context, child) => ListTile(
                              leading: Icon(Icons.person),
                              title: TextButton(
                                child: Text(
                                  (widget.viewModel.currentOwner == null)
                                      ? "Aucun"
                                      : "${widget.viewModel.currentOwner!.firstName} ${widget.viewModel.currentOwner!.lastName}",
                                ),
                                onPressed: () => _ownerDialogBuilder(
                                  context,
                                  controller,
                                  widget.viewModel,
                                ),
                              ),
                            ),
                          ),
                          ListTile(
                            leading: Icon(Icons.attach_money),
                            title: TextButton(
                              child: Text(
                                (widget.viewModel.askPrice)
                                    ? "Demander à chaque fois"
                                    : "Prix libre toujours",
                              ),
                              onPressed: () {
                                setState(() {
                                  widget.viewModel.askPrice =
                                      !widget.viewModel.askPrice;
                                });
                              },
                            ),
                          ),
                        ],
                      ),
                    ),
                  ),
                  SizedBox(height: 100),
                  SvgPicture.asset('assets/scan-overlay.svg'),
                ],
              ),
            ),
          ),
          SafeArea(
            child: Column(
              mainAxisAlignment: MainAxisAlignment.end,
              children: [
                Center(
                  child: TextButton(
                    style: ButtonStyle(
                      backgroundColor: WidgetStatePropertyAll(theme.cardColor),
                    ),
                    onPressed: () => _formDialogBuilder(
                      context,
                      controller,
                      widget.viewModel,
                    ),
                    child: Text("Enregistrer manuellement"),
                  ),
                ),
              ],
            ),
          ),
        ],
      ),
    );
    // },
    // );
  }
}

Future<void> _confirmationDialogBuilder(
  BuildContext context,
  Function(num) setPrice,
  MobileScannerController controller,
  AddViewModel viewModel,
  Book book,
) {
  controller.stop();

  void exitPopup(BuildContext localContext) {
    Navigator.of(localContext).pop();
    controller.start();
  }

  return showDialog(
    context: context,
    barrierDismissible: false,
    builder: (context) => ConfirmationPopup(
      exitPopup: exitPopup,
      setPrice: setPrice,
      viewModel: viewModel,
      book: book,
    ),
  );
}

Future<void> _formDialogBuilder(
  BuildContext context,
  MobileScannerController controller,
  AddViewModel viewModel,
) {
  controller.stop();

  void exitPopup(BuildContext localContext) {
    Navigator.of(localContext).pop();
    controller.start();
  }

  return showDialog(
    context: context,
    barrierDismissible: false,
    builder: (context) => FormPopup(viewModel: viewModel, exitPopup: exitPopup),
  );
}

Future<void> _ownerDialogBuilder(
  BuildContext context,
  MobileScannerController controller,
  AddViewModel viewModel,
) {
  controller.stop();

  void onPressAccept(BuildContext localContext) {
    Navigator.of(localContext).pop();
    controller.start();
  }

  return showDialog(
    context: context,
    barrierDismissible: false,
    builder: (context) =>
        OwnerPopup(viewModel: viewModel, onPressAccept: onPressAccept),
  );
}