/*
 * Copyright (C) 2023 Yubico.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import 'package:flutter/material.dart';
import 'package:flutter_gen/gen_l10n/app_localizations.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';

import '../../app/message.dart';
import '../../app/models.dart';
import '../../app/state.dart';
import '../../exception/cancellation_exception.dart';
import '../../widgets/responsive_dialog.dart';
import '../keys.dart' as keys;
import '../models.dart';
import '../state.dart';

class DeleteCertificateDialog extends ConsumerStatefulWidget {
  final DevicePath devicePath;
  final PivState pivState;
  final PivSlot pivSlot;
  const DeleteCertificateDialog(this.devicePath, this.pivState, this.pivSlot,
      {super.key});

  @override
  ConsumerState<ConsumerStatefulWidget> createState() =>
      _DeleteCertificateDialogState();
}

class _DeleteCertificateDialogState
    extends ConsumerState<DeleteCertificateDialog> {
  late bool _deleteCertificate;
  late bool _deleteKey;

  @override
  void initState() {
    super.initState();
    _deleteCertificate = widget.pivSlot.certInfo != null;
    _deleteKey = widget.pivSlot.metadata != null &&
        widget.pivState.version.isAtLeast(5, 7);
  }

  @override
  Widget build(BuildContext context) {
    final l10n = AppLocalizations.of(context)!;
    final canDeleteCertificate = widget.pivSlot.certInfo != null;
    final canDeleteKey = widget.pivSlot.metadata != null &&
        widget.pivState.version.isAtLeast(5, 7);

    return ResponsiveDialog(
      title: Text(canDeleteKey && canDeleteCertificate
          ? l10n.l_delete_certificate_or_key
          : canDeleteCertificate
              ? l10n.l_delete_certificate
              : l10n.l_delete_key),
      actions: [
        TextButton(
          key: keys.deleteButton,
          onPressed: _deleteKey || _deleteCertificate
              ? () async {
                  try {
                    await ref
                        .read(pivSlotsProvider(widget.devicePath).notifier)
                        .delete(widget.pivSlot.slot, _deleteCertificate,
                            _deleteKey);

                    await ref.read(withContextProvider)(
                      (context) async {
                        String message;
                        if (_deleteCertificate && _deleteKey) {
                          message = l10n.l_certificate_and_key_deleted;
                        } else if (_deleteCertificate) {
                          message = l10n.l_certificate_deleted;
                        } else {
                          message = l10n.l_key_deleted;
                        }

                        Navigator.of(context).pop(true);
                        showMessage(context, message);
                      },
                    );
                  } on CancellationException catch (_) {
                    // ignored
                  }
                }
              : null,
          child: Text(l10n.s_delete),
        ),
      ],
      child: Padding(
        padding: const EdgeInsets.symmetric(horizontal: 18.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            if (_deleteCertificate || _deleteKey) ...[
              Text(
                _deleteCertificate && _deleteKey
                    ? l10n.p_warning_delete_certificate_and_key
                    : _deleteCertificate
                        ? l10n.p_warning_delete_certificate
                        : l10n.p_warning_delete_key,
                style: Theme.of(context)
                    .textTheme
                    .bodyMedium
                    ?.copyWith(fontWeight: FontWeight.w700),
              ),
              Text(_deleteCertificate && _deleteKey
                  ? l10n.q_delete_certificate_and_key_confirm(
                      widget.pivSlot.slot.getDisplayName(l10n))
                  : _deleteCertificate
                      ? l10n.q_delete_certificate_confirm(
                          widget.pivSlot.slot.getDisplayName(l10n))
                      : l10n.q_delete_key_confirm(
                          widget.pivSlot.slot.getDisplayName(l10n)))
            ],
            if (!_deleteCertificate && !_deleteKey)
              Text(l10n.p_select_what_to_delete),
            if (canDeleteKey && canDeleteCertificate)
              Wrap(
                spacing: 4.0,
                runSpacing: 8.0,
                children: [
                  if (canDeleteCertificate)
                    FilterChip(
                      label: Text(l10n.s_certificate),
                      selected: _deleteCertificate,
                      onSelected: (value) {
                        setState(() {
                          _deleteCertificate = value;
                        });
                      },
                    ),
                  if (canDeleteKey)
                    FilterChip(
                        label: Text(l10n.s_private_key),
                        selected: _deleteKey,
                        onSelected: (value) {
                          setState(() {
                            _deleteKey = value;
                          });
                        })
                ],
              ),
          ]
              .map((e) => Padding(
                    padding: const EdgeInsets.symmetric(vertical: 8.0),
                    child: e,
                  ))
              .toList(),
        ),
      ),
    );
  }
}