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/constants.dart';
import 'package:invoiceninja_flutter/main_app.dart';
import 'package:invoiceninja_flutter/redux/app/app_actions.dart';
import 'package:invoiceninja_flutter/redux/ui/ui_actions.dart';
import 'package:invoiceninja_flutter/utils/completers.dart';
import 'package:invoiceninja_flutter/utils/dialogs.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/token/view/token_view_vm.dart';
import 'package:invoiceninja_flutter/redux/token/token_actions.dart';
import 'package:invoiceninja_flutter/data/models/token_model.dart';
import 'package:invoiceninja_flutter/ui/token/edit/token_edit.dart';
import 'package:invoiceninja_flutter/redux/app/app_state.dart';

class TokenEditScreen extends StatelessWidget {
  const TokenEditScreen({Key key}) : super(key: key);
  static const String route = '/$kSettings/$kSettingsTokenEdit';

  @override
  Widget build(BuildContext context) {
    return StoreConnector<AppState, TokenEditVM>(
      converter: (Store<AppState> store) {
        return TokenEditVM.fromStore(store);
      },
      builder: (context, viewModel) {
        return TokenEdit(
          viewModel: viewModel,
          key: ValueKey(viewModel.token.updatedAt),
        );
      },
    );
  }
}

class TokenEditVM {
  TokenEditVM({
    @required this.state,
    @required this.token,
    @required this.company,
    @required this.onChanged,
    @required this.isSaving,
    @required this.origToken,
    @required this.onSavePressed,
    @required this.onCancelPressed,
    @required this.isLoading,
  });

  factory TokenEditVM.fromStore(Store<AppState> store) {
    final state = store.state;
    final token = state.tokenUIState.editing;

    return TokenEditVM(
      state: state,
      isLoading: state.isLoading,
      isSaving: state.isSaving,
      origToken: state.tokenState.map[token.id],
      token: token,
      company: state.company,
      onChanged: (TokenEntity token) {
        store.dispatch(UpdateToken(token));
      },
      onCancelPressed: (BuildContext context) {
        createEntity(context: context, entity: TokenEntity(), force: true);
        if (state.tokenUIState.cancelCompleter != null) {
          state.tokenUIState.cancelCompleter.complete();
        } else {
          store.dispatch(UpdateCurrentRoute(state.uiState.previousRoute));
        }
      },
      onSavePressed: (BuildContext context) {
        Debouncer.runOnComplete(() {
          final token = store.state.tokenUIState.editing;
          passwordCallback(
              context: context,
              callback: (password, idToken) {
                final localization = navigatorKey.localization;
                final navigator = navigatorKey.currentState;
                final Completer<TokenEntity> completer =
                    new Completer<TokenEntity>();
                store.dispatch(SaveTokenRequest(
                  completer: completer,
                  token: token,
                  password: password,
                  idToken: idToken,
                ));
                return completer.future.then((savedToken) {
                  showToast(token.isNew
                      ? localization.createdToken
                      : localization.updatedToken);

                  if (state.prefState.isMobile) {
                    store.dispatch(UpdateCurrentRoute(TokenViewScreen.route));
                    if (token.isNew) {
                      navigator.pushReplacementNamed(TokenViewScreen.route);
                    } else {
                      navigator.pop(savedToken);
                    }
                  } else {
                    viewEntity(entity: savedToken, force: true);
                  }
                }).catchError((Object error) {
                  showDialog<ErrorDialog>(
                      context: navigatorKey.currentContext,
                      builder: (BuildContext context) {
                        return ErrorDialog(error);
                      });
                });
              });
        });
      },
    );
  }

  final TokenEntity token;
  final CompanyEntity company;
  final Function(TokenEntity) onChanged;
  final Function(BuildContext) onSavePressed;
  final Function(BuildContext) onCancelPressed;
  final bool isLoading;
  final bool isSaving;
  final TokenEntity origToken;
  final AppState state;
}