import 'dart:async';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_redux/flutter_redux.dart';
import 'package:invoiceninja_flutter/redux/app/app_actions.dart';
import 'package:invoiceninja_flutter/redux/ui/ui_actions.dart';
import 'package:invoiceninja_flutter/ui/expense/edit/expense_edit.dart';
import 'package:invoiceninja_flutter/ui/expense/edit/expense_edit_vm.dart';
import 'package:invoiceninja_flutter/utils/completers.dart';
import 'package:redux/redux.dart';
import 'package:invoiceninja_flutter/data/models/models.dart';
import 'package:invoiceninja_flutter/ui/app/dialogs/error_dialog.dart';
import 'package:invoiceninja_flutter/ui/recurring_expense/view/recurring_expense_view_vm.dart';
import 'package:invoiceninja_flutter/redux/recurring_expense/recurring_expense_actions.dart';
import 'package:invoiceninja_flutter/redux/app/app_state.dart';
import 'package:flutter_styled_toast/flutter_styled_toast.dart';
import 'package:invoiceninja_flutter/utils/localization.dart';

class RecurringExpenseEditScreen extends StatelessWidget {
  const RecurringExpenseEditScreen({Key key}) : super(key: key);
  static const String route = '/recurring_expense/edit';

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

class RecurringExpenseEditVM extends AbstractExpenseEditVM {
  RecurringExpenseEditVM({
    AppState state,
    ExpenseEntity expense,
    Function(ExpenseEntity) onChanged,
    Function(BuildContext) onSavePressed,
    Function(BuildContext) onCancelPressed,
    bool isLoading,
    bool isSaving,
    ExpenseEntity origExpense,
    Function(BuildContext context, Completer<SelectableEntity> completer)
        onAddClientPressed,
    Function(BuildContext context, Completer<SelectableEntity> completer)
        onAddVendorPressed,
  }) : super(
          state: state,
          expense: expense,
          onChanged: onChanged,
          onSavePressed: onSavePressed,
          onCancelPressed: onCancelPressed,
          origExpense: origExpense,
          onAddClientPressed: onAddClientPressed,
          onAddVendorPressed: onAddVendorPressed,
        );

  factory RecurringExpenseEditVM.fromStore(Store<AppState> store) {
    final state = store.state;
    final recurringExpense = state.recurringExpenseUIState.editing;

    return RecurringExpenseEditVM(
      state: state,
      isLoading: state.isLoading,
      isSaving: state.isSaving,
      origExpense: state.recurringExpenseState.map[recurringExpense.id],
      expense: recurringExpense,
      onChanged: (ExpenseEntity recurringExpense) {
        store.dispatch(UpdateRecurringExpense(recurringExpense));
      },
      onCancelPressed: (BuildContext context) {
        createEntity(context: context, entity: ExpenseEntity(), force: true);
        if (state.recurringExpenseUIState.cancelCompleter != null) {
          state.recurringExpenseUIState.cancelCompleter.complete();
        } else {
          store.dispatch(UpdateCurrentRoute(state.uiState.previousRoute));
        }
      },
      onSavePressed: (BuildContext context) {
        Debouncer.runOnComplete(() {
          final recurringExpense = store.state.recurringExpenseUIState.editing;
          final localization = AppLocalization.of(context);
          final Completer<ExpenseEntity> completer =
              new Completer<ExpenseEntity>();
          store.dispatch(SaveRecurringExpenseRequest(
              completer: completer, recurringExpense: recurringExpense));
          return completer.future.then((savedRecurringExpense) {
            showToast(recurringExpense.isNew
                ? localization.createdRecurringExpense
                : localization.updatedRecurringExpense);
            if (state.prefState.isMobile) {
              store.dispatch(
                  UpdateCurrentRoute(RecurringExpenseViewScreen.route));
              if (recurringExpense.isNew) {
                Navigator.of(context)
                    .pushReplacementNamed(RecurringExpenseViewScreen.route);
              } else {
                Navigator.of(context).pop(savedRecurringExpense);
              }
            } else {
              viewEntity(entity: savedRecurringExpense, force: true);
            }
          }).catchError((Object error) {
            showDialog<ErrorDialog>(
                context: context,
                builder: (BuildContext context) {
                  return ErrorDialog(error);
                });
          });
        });
      },
    );
  }
}