/*
Copyright 2020-2021 Vishesh Handa <me@vhanda.in>

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 'dart:convert';

import 'package:flutter/material.dart';

import 'package:crypto/crypto.dart';
import 'package:easy_localization/easy_localization.dart';
import 'package:provider/provider.dart';

import 'package:gitjournal/app_settings.dart';

class ExperimentalSettingsScreen extends StatefulWidget {
  @override
  _ExperimentalSettingsScreenState createState() =>
      _ExperimentalSettingsScreenState();
}

class _ExperimentalSettingsScreenState
    extends State<ExperimentalSettingsScreen> {
  @override
  Widget build(BuildContext context) {
    var appSettings = Provider.of<AppSettings>(context);

    return Scaffold(
      appBar: AppBar(
        title: Text(tr('settings.experimental.title')),
        leading: IconButton(
          icon: const Icon(Icons.arrow_back),
          onPressed: () {
            Navigator.of(context).pop();
          },
        ),
      ),
      body: Scrollbar(
        child: ListView(
          children: <Widget>[
            SwitchListTile(
              title: Text(tr('settings.experimental.fs')),
              value: appSettings.experimentalFs,
              onChanged: (bool newVal) {
                appSettings.experimentalFs = newVal;
                appSettings.save();
                setState(() {});
              },
            ),
            SwitchListTile(
              title: Text(tr('settings.experimental.graphView')),
              value: appSettings.experimentalGraphView,
              onChanged: (bool newVal) {
                appSettings.experimentalGraphView = newVal;
                appSettings.save();
                setState(() {});
              },
            ),
            SwitchListTile(
              title: Text(tr('settings.experimental.markdownToolbar')),
              value: appSettings.experimentalMarkdownToolbar,
              onChanged: (bool newVal) {
                appSettings.experimentalMarkdownToolbar = newVal;
                appSettings.save();
                setState(() {});
              },
            ),
            SwitchListTile(
              title: Text(tr('settings.experimental.accounts')),
              value: appSettings.experimentalAccounts,
              onChanged: (bool newVal) {
                appSettings.experimentalAccounts = newVal;
                appSettings.save();
                setState(() {});
              },
            ),
            ListTile(
              title: const Text('Enter Pro Password'),
              subtitle: Text('Pro: ' + AppSettings.instance.proMode.toString()),
              onTap: () async {
                await showDialog(
                  context: context,
                  builder: (context) => _PasswordForm(),
                );
                setState(() {});
                print('Changing State');
              },
            ),
          ],
          padding: const EdgeInsets.fromLTRB(0.0, 16.0, 0.0, 0.0),
        ),
      ),
    );
  }
}

class _PasswordForm extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return AlertDialog(
      title: const Text('Enter Pro Password'),
      content: TextField(
        style: Theme.of(context).textTheme.headline6,
        decoration: const InputDecoration(
          icon: Icon(Icons.security_rounded),
          hintText: 'Enter Password',
          labelText: 'Password',
        ),
        onChanged: (String value) {
          value = value.trim();
          if (value.isEmpty) {
            return null;
          }

          final salt = 'randomSaltGitJournal';
          var sha1Digest = sha1.convert(utf8.encode(value + salt));
          print(sha1Digest);

          if (sha1Digest.toString() !=
              '27538d8231e49655fd1c26c7b8495c2c870c741b') {
            return null;
          }

          print('Unlocking Pro Mode');

          var appSettings = AppSettings.instance;
          appSettings.proMode = true;
          appSettings.validateProMode = false;
          appSettings.proExpirationDate = '2050-01-01';
          appSettings.save();
        },
      ),
      actions: <Widget>[
        FlatButton(
          child: const Text('Ok'),
          onPressed: () {
            Navigator.of(context).pop();
          },
        )
      ],
    );
  }
}