import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:flutter/services.dart';
import 'dart:ui' as ui;
import 'package:flutter_easyloading/flutter_easyloading.dart';
import 'dart:async';
import 'dart:math' as math;
import 'common.dart';
import 'model.dart';
import 'package:tuple/tuple.dart';

class RemotePage extends StatefulWidget {
  RemotePage({Key key, this.id}) : super(key: key);

  final String id;

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

// https://github.com/hanxu317317/flutter_plan_demo/blob/master/lib/src/enter.dart
class _RemotePageState extends State<RemotePage> {
  Timer _interval;
  bool _showBar = true;

  @override
  void initState() {
    super.initState();
    FFI.connect(widget.id);
    WidgetsBinding.instance.addPostFrameCallback((_) {
      // https://stackoverflow.com/questions/46640116/make-flutter-application-fullscreen
      SystemChrome.setEnabledSystemUIOverlays([]);
      showLoading('Connecting...');
      _interval =
          Timer.periodic(Duration(milliseconds: 30), (timer) => interval());
    });
  }

  @override
  void dispose() {
    super.dispose();
    FFI.close();
    _interval.cancel();
    dismissLoading();
    SystemChrome.setEnabledSystemUIOverlays(SystemUiOverlay.values);
  }

  void interval() {
    FFI.ffiModel.update(widget.id, context, handleMsgbox);
  }

  void handleMsgbox(Map<String, dynamic> evt, String id, BuildContext context) {
    var type = evt['type'];
    var title = evt['title'];
    var text = evt['text'];
    if (type == 're-input-password') {
      wrongPasswordDialog(id, context);
    } else if (type == 'input-password') {
      enterPasswordDialog(id, context);
    } else {
      msgbox(type, title, text, context);
    }
  }

  @override
  Widget build(BuildContext context) {
    // Size size = MediaQueryData.fromWindow(ui.window).size;
    // MediaQuery.of(context).size.height;
    EasyLoading.instance.loadingStyle = EasyLoadingStyle.light;
    return Scaffold(
        floatingActionButton: _showBar
            ? null
            : FloatingActionButton(
                mini: true,
                child: Icon(Icons.expand_less),
                backgroundColor: MyTheme.accent50,
                onPressed: () {
                  setState(() => _showBar = !_showBar);
                }),
        bottomNavigationBar: _showBar
            ? BottomAppBar(
                color: MyTheme.accent,
                child: Row(
                  mainAxisSize: MainAxisSize.max,
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: <Widget>[
                    Row(children: [
                      IconButton(
                        color: Colors.white,
                        icon: Icon(Icons.clear),
                        onPressed: () {},
                      ),
                      IconButton(
                        color: Colors.white,
                        icon: Icon(Icons.keyboard),
                        onPressed: () {},
                      ),
                      Transform.rotate(
                          angle: 15 * math.pi / 180,
                          child: IconButton(
                            color: Colors.white,
                            icon: Icon(Icons.flash_on),
                            onPressed: () {},
                          )),
                      IconButton(
                        color: Colors.white,
                        icon: Icon(Icons.tv),
                        onPressed: () {
                          showOptions(widget.id, context);
                        },
                      ),
                      IconButton(
                        color: Colors.white,
                        icon: Icon(Icons.settings),
                        onPressed: () {},
                      )
                    ]),
                    IconButton(
                        color: Colors.white,
                        icon: Icon(Icons.expand_more),
                        onPressed: () {
                          setState(() => _showBar = !_showBar);
                        }),
                  ],
                ),
              )
            : null,
        body: FlutterEasyLoading(
            child: Container(
          color: MyTheme.canvasColor,
          child: InteractiveViewer(
            constrained: false,
            panEnabled: true,
            onInteractionUpdate: (details) {
              print('$details');
            },
            child: Stack(children: [
              ImagePaint(),
              CursorPaint(),
            ]),
          ),
        )));
  }
}

class ImagePaint extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final m = Provider.of<ImageModel>(context);
    return CustomPaint(
      painter: new ImagePainter(image: m.image, x: 0, y: 0),
    );
  }
}

class CursorPaint extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final m = Provider.of<CursorModel>(context);
    return CustomPaint(
      painter: new ImagePainter(image: m.image, x: m.x, y: m.y),
    );
  }
}

class ImagePainter extends CustomPainter {
  ImagePainter({
    this.image,
    this.x,
    this.y,
  });

  ui.Image image;
  double x;
  double y;

  @override
  void paint(Canvas canvas, Size size) {
    if (image == null) return;
    canvas.drawImage(image, new Offset(x, y), new Paint());
  }

  @override
  bool shouldRepaint(CustomPainter oldDelegate) {
    return oldDelegate != this;
  }
}

void enterPasswordDialog(String id, BuildContext context) {
  final controller = TextEditingController();
  var remember = FFI.getByName('remember', id) == 'true';
  showAlertDialog(
      context,
      (setState) => Tuple3(
            Text('Please enter your password'),
            Column(mainAxisSize: MainAxisSize.min, children: [
              TextField(
                autofocus: true,
                obscureText: true,
                controller: controller,
                decoration: const InputDecoration(
                  labelText: 'Password',
                ),
              ),
              ListTile(
                title: Text(
                  'Remember the password',
                ),
                leading: Checkbox(
                  value: remember,
                  onChanged: (v) {
                    setState(() => remember = v);
                  },
                ),
              ),
            ]),
            [
              FlatButton(
                textColor: MyTheme.accent,
                onPressed: () {
                  Navigator.pop(context);
                  Navigator.pop(context);
                },
                child: Text('Cancel'),
              ),
              FlatButton(
                textColor: MyTheme.accent,
                onPressed: () {
                  var text = controller.text.trim();
                  if (text == '') return;
                  FFI.login(text, remember);
                  showLoading('Logging in...');
                  Navigator.pop(context);
                },
                child: Text('OK'),
              ),
            ],
          ));
}

void wrongPasswordDialog(String id, BuildContext context) {
  showAlertDialog(
      context,
      (_) =>
          Tuple3(Text('Wrong Password'), Text('Do you want to enter again?'), [
            FlatButton(
              textColor: MyTheme.accent,
              onPressed: () {
                Navigator.pop(context);
                Navigator.pop(context);
              },
              child: Text('Cancel'),
            ),
            FlatButton(
              textColor: MyTheme.accent,
              onPressed: () {
                Navigator.pop(context);
                enterPasswordDialog(id, context);
              },
              child: Text('Retry'),
            ),
          ]));
}

void showOptions(String id, BuildContext context) {
  var showRemoteCursor =
      FFI.getByName('toggle_option', 'show-remote-cursor') == 'true';
  var lockAfterSessionEnd =
      FFI.getByName('toggle_option', 'lock-after-session-end') == 'true';
  showAlertDialog(
      context,
      (setState) => Tuple3(
          null,
          Column(mainAxisSize: MainAxisSize.min, children: [
            CheckboxListTile(
                value: showRemoteCursor,
                onChanged: (v) {
                  setState(() {
                    showRemoteCursor = v;
                    FFI.setByName('toggle_option', 'show-remote-cursor');
                  });
                },
                title: Text('Show remote cursor')),
            CheckboxListTile(
                value: lockAfterSessionEnd,
                onChanged: (v) {
                  setState(() {
                    lockAfterSessionEnd = v;
                    FFI.setByName('toggle_option', 'lock-after-session-end');
                  });
                },
                title: Text('Lock after session end'))
          ]),
          null),
      () async => true,
      true,
      10);
}