import 'package:comunic/helpers/account_helper.dart';
import 'package:comunic/helpers/settings_helper.dart';
import 'package:comunic/models/security_settings.dart';
import 'package:comunic/ui/dialogs/input_new_password_dialog.dart';
import 'package:comunic/ui/dialogs/input_user_password_dialog.dart';
import 'package:comunic/ui/widgets/dialogs/auto_sized_dialog_content_widget.dart';
import 'package:comunic/utils/intl_utils.dart';
import 'package:comunic/utils/ui_utils.dart';
import 'package:flutter/material.dart';
import 'package:settings_ui/settings_ui.dart';

/// Account security settings
///
/// @author Pierre HUBERT

class AccountSecuritySettingsScreen extends StatefulWidget {
  @override
  _AccountSecuritySettingsScreenState createState() =>
      _AccountSecuritySettingsScreenState();
}

class _AccountSecuritySettingsScreenState
    extends State<AccountSecuritySettingsScreen> {
  @override
  Widget build(BuildContext context) {
    return SettingsList(
      sections: [
        SettingsSection(
          title: tr("Password"),
          tiles: [
            SettingsTile(
              title: tr("Change password"),
              onTap: _changePassword,
            ),
            SettingsTile(
              title: tr("Change your security questions"),
              subtitle: tr(
                  "Your security questions can be used to recover an access to your account when you loose your password..."),
              onTap: _changeSecurityQuestions,
            ),
            SettingsTile(
              title: tr("Disconnect all your devices"),
              subtitle: tr(
                  "Disconnect all your devices from Comunic, including the current one. Use this option if one of the device you use for Comunic was stolen."),
              onTap: _disconnectAllDevices,
            ),
          ],
        )
      ],
    );
  }

  /// Change current user password
  void _changePassword() async {
    try {
      final currPassword = await showUserPasswordDialog(context);

      if (currPassword == null) return;

      final newPassword = await showInputNewPassword(context);

      if (newPassword == null) return;

      await SettingsHelper.changePassword(currPassword, newPassword);

      showSimpleSnack(
          context, tr("Your password has been successfully changed!"));
    } catch (e, stack) {
      print("Could not update current user password! $e\n$stack");
      showSimpleSnack(context, tr("Could not update password!"));
    }
  }

  /// Change security questions
  void _changeSecurityQuestions() async {
    try {
      final password = await showUserPasswordDialog(context);

      if (password == null) return;

      final settings = await SettingsHelper.getSecuritySettings(password);

      final newSettings = await showDialog<SecuritySettings>(
          context: context,
          builder: (c) => _SecurityQuestionsDialog(settings: settings));

      if (newSettings == null) return;

      await SettingsHelper.setSecuritySettings(password, newSettings);

      showSimpleSnack(context,
          tr("You security questions have been successfully updated!"));
    } catch (e, stack) {
      print("Could not update security questions!$e\n$stack");
      showSimpleSnack(context, tr("Could not update security questions!"));
    }
  }

  /// Disconnect all devices
  void _disconnectAllDevices() async {
    try {
      if (!await showConfirmDialog(
          context: context,
          message: tr(
              "Do you really want to disconnect all your devices from Comunic ?")))
        return;

      await AccountHelper.disconnectAllDevices();
    } catch (e, stack) {
      print("Could not disconnect user on all devices! $e\n$stack");
      showSimpleSnack(
          context, tr("Could not disconnect you from all your devices!"));
    }
  }
}

class _SecurityQuestionsDialog extends StatefulWidget {
  final SecuritySettings settings;

  const _SecurityQuestionsDialog({Key key, @required this.settings})
      : assert(settings != null),
        super(key: key);

  @override
  __SecurityQuestionsDialogState createState() =>
      __SecurityQuestionsDialogState();
}

class __SecurityQuestionsDialogState extends State<_SecurityQuestionsDialog> {
  TextEditingController _controllerQuestion1;
  TextEditingController _controllerAnswer1;
  TextEditingController _controllerQuestion2;
  TextEditingController _controllerAnswer2;

  SecuritySettings get _newSettings => SecuritySettings(
        securityQuestion1: _controllerQuestion1.text,
        securityAnswer1: _controllerAnswer1.text,
        securityQuestion2: _controllerQuestion2.text,
        securityAnswer2: _controllerAnswer2.text,
      );

  @override
  void initState() {
    _controllerQuestion1 =
        TextEditingController(text: widget.settings.securityQuestion1);
    _controllerAnswer1 =
        TextEditingController(text: widget.settings.securityAnswer1);
    _controllerQuestion2 =
        TextEditingController(text: widget.settings.securityQuestion2);
    _controllerAnswer2 =
        TextEditingController(text: widget.settings.securityAnswer2);
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return AlertDialog(
      title: Text(tr("Update security questions")),
      content: AutoSizeDialogContentWidget(child: _buildContent()),
      actions: <Widget>[
        MaterialButton(
          onPressed: () => Navigator.of(context).pop(),
          child: Text(tr("Cancel").toUpperCase()),
        ),
        MaterialButton(
          onPressed: () => Navigator.of(context).pop(_newSettings),
          child: Text(tr("Update").toUpperCase()),
        )
      ],
    );
  }

  Widget _buildContent() {
    return Column(
      children: <Widget>[
        Text(tr(
            "Note: Your two questions and answers MUST be completed in order to be able to recover your account using your security questions!")),
        _buildTextField(
            controller: _controllerQuestion1, label: tr("Question 1")),
        _buildTextField(controller: _controllerAnswer1, label: tr("Answer 1")),
        _buildTextField(
            controller: _controllerQuestion2, label: tr("Question 2")),
        _buildTextField(controller: _controllerAnswer2, label: tr("Answer 2")),
      ],
    );
  }

  Widget _buildTextField({
    @required TextEditingController controller,
    @required String label,
  }) {
    return TextField(
      controller: controller,
      onChanged: (s) => setState(() {}),
      decoration: InputDecoration(
        alignLabelWithHint: true,
        labelText: label,
        errorText: controller.text.isNotEmpty && controller.text.length < 5
            ? tr("Unsafe value!")
            : null,
      ),
    );
  }
}