import 'dart:async';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_redux/flutter_redux.dart';
import 'package:flutter_styled_toast/flutter_styled_toast.dart';
import 'package:invoiceninja_flutter/redux/app/app_actions.dart';
import 'package:invoiceninja_flutter/redux/recurring_invoice/recurring_invoice_actions.dart';
import 'package:invoiceninja_flutter/redux/ui/ui_actions.dart';
import 'package:invoiceninja_flutter/ui/app/dialogs/error_dialog.dart';
import 'package:invoiceninja_flutter/ui/invoice/edit/invoice_edit_vm.dart';
import 'package:invoiceninja_flutter/ui/recurring_invoice/edit/recurring_invoice_edit.dart';
import 'package:invoiceninja_flutter/ui/recurring_invoice/view/recurring_invoice_view_vm.dart';
import 'package:invoiceninja_flutter/utils/completers.dart';
import 'package:invoiceninja_flutter/utils/localization.dart';
import 'package:invoiceninja_flutter/utils/platforms.dart';
import 'package:invoiceninja_flutter/utils/app_context.dart';
import 'package:redux/redux.dart';
import 'package:invoiceninja_flutter/data/models/models.dart';
import 'package:invoiceninja_flutter/redux/app/app_state.dart';

class RecurringInvoiceEditScreen extends StatelessWidget {
  const RecurringInvoiceEditScreen({Key key}) : super(key: key);

  static const String route = '/recurring_invoice/edit';

  @override
  Widget build(BuildContext context) {
    return StoreConnector<AppState, RecurringInvoiceEditVM>(
      converter: (Store<AppState> store) {
        return RecurringInvoiceEditVM.fromStore(store);
      },
      builder: (context, viewModel) {
        return RecurringInvoiceEdit(
          viewModel: viewModel,
          key: ValueKey(viewModel.invoice.id),
        );
      },
    );
  }
}

class RecurringInvoiceEditVM extends EntityEditVM {
  RecurringInvoiceEditVM({
    AppState state,
    CompanyEntity company,
    InvoiceEntity invoice,
    int invoiceItemIndex,
    InvoiceEntity origInvoice,
    Function(BuildContext) onSavePressed,
    Function(List<InvoiceItemEntity>, String) onItemsAdded,
    bool isSaving,
    Function(BuildContext) onCancelPressed,
  }) : super(
          state: state,
          company: company,
          invoice: invoice,
          invoiceItemIndex: invoiceItemIndex,
          origInvoice: origInvoice,
          onSavePressed: onSavePressed,
          onItemsAdded: onItemsAdded,
          isSaving: isSaving,
          onCancelPressed: onCancelPressed,
        );

  factory RecurringInvoiceEditVM.fromStore(Store<AppState> store) {
    final AppState state = store.state;
    final recurringInvoice = state.recurringInvoiceUIState.editing;

    return RecurringInvoiceEditVM(
      state: state,
      company: state.company,
      isSaving: state.isSaving,
      invoice: recurringInvoice,
      invoiceItemIndex: state.recurringInvoiceUIState.editingItemIndex,
      origInvoice: store.state.recurringInvoiceState.map[recurringInvoice.id],
      onSavePressed: (BuildContext context, [EntityAction action]) {
        final appContext = context.getAppContext();
        Debouncer.runOnComplete(() {
          final recurringInvoice = store.state.recurringInvoiceUIState.editing;
          if (recurringInvoice.clientId.isEmpty) {
            showDialog<ErrorDialog>(
                context: context,
                builder: (BuildContext context) {
                  return ErrorDialog(
                      appContext.localization.pleaseSelectAClient);
                });
            return null;
          }
          final localization = appContext.localization;
          final Completer<InvoiceEntity> completer = Completer<InvoiceEntity>();
          store.dispatch(SaveRecurringInvoiceRequest(
              completer: completer, recurringInvoice: recurringInvoice));
          return completer.future.then((savedRecurringInvoice) {
            showToast(recurringInvoice.isNew
                ? localization.createdRecurringInvoice
                : localization.updatedRecurringInvoice);

            if (state.prefState.isMobile) {
              store.dispatch(
                  UpdateCurrentRoute(RecurringInvoiceViewScreen.route));
              if (recurringInvoice.isNew) {
                appContext.navigator
                    .pushReplacementNamed(RecurringInvoiceViewScreen.route);
              } else {
                appContext.navigator.pop(savedRecurringInvoice);
              }
            } else {
              if (action != null) {
                handleEntityAction(appContext, savedRecurringInvoice, action);
              } else {
                viewEntity(
                    appContext: appContext,
                    entity: savedRecurringInvoice,
                    force: true);
              }
            }
          }).catchError((Object error) {
            showDialog<ErrorDialog>(
                context: context,
                builder: (BuildContext context) {
                  return ErrorDialog(error);
                });
          });
        });
      },
      onItemsAdded: (items, clientId) {
        if (items.length == 1) {
          store.dispatch(
              EditRecurringInvoiceItem(recurringInvoice.lineItems.length));
        }
        store.dispatch(AddRecurringInvoiceItems(items));
      },
      onCancelPressed: (BuildContext context) {
        createEntity(context: context, entity: InvoiceEntity(), force: true);
        store.dispatch(UpdateCurrentRoute(state.uiState.previousRoute));
      },
    );
  }
}