import 'dart:async';

import 'package:bus_infotainment/pages/components/ibus_display.dart';
import 'package:bus_infotainment/backend/live_information.dart';
import 'package:bus_infotainment/tfl_datasets.dart';
import 'package:bus_infotainment/utils/OrdinanceSurveyUtils.dart';
import 'package:bus_infotainment/utils/audio%20wrapper.dart';
import 'package:bus_infotainment/utils/delegates.dart';
import 'package:flutter/material.dart';
import 'package:geolocator/geolocator.dart';
import 'package:google_fonts/google_fonts.dart';

class pages_Home extends StatelessWidget {
  const pages_Home({super.key});

  @override
  Widget build(BuildContext context) {

    return Container(



      child: Column(
        children: [

          Row(

            children: [

              Speedometer(),

            ],

          ),

          Container(
            height: 2,
            color: Colors.white70,
          ),

          SingleChildScrollView(
            child: Column(
              children: [

                Container(

                  margin: EdgeInsets.all(10),

                  child: Container(

                    decoration: BoxDecoration(
                      color: Colors.grey.shade900,
                    ),

                    child: AnnouncementPicker(
                      backgroundColor: Colors.grey.shade900,
                      outlineColor: Colors.white70,
                      announcements: [
                        for (NamedAnnouncementQueueEntry announcement in LiveInformation().announcementModule.manualAnnouncements)
                          _AnnouncementEntry(
                            label: announcement.shortName,
                            index: LiveInformation().announcementModule.manualAnnouncements.indexOf(announcement),
                            outlineColor: Colors.white70,
                            onPressed: (){
                              LiveInformation liveInformation = LiveInformation();
                              liveInformation.announcementModule.queueAnnounementByInfoIndex(
                                infoIndex: liveInformation.announcementModule.manualAnnouncements.indexOf(announcement),
                                sendToServer: true
                              );
                            },
                          )
                      ],
                    ),
                  ),

                ),

                Container(
                  height: 2,
                  color: Colors.white70,
                ),

                Container(

                  margin: EdgeInsets.all(10),

                  child: Container(
                    decoration: BoxDecoration(
                      color: Colors.grey.shade900,
                    ),

                    child: DelegateBuilder<BusRouteVariant>(
                      delegate: LiveInformation().routeVariantDelegate,
                      builder: (context, routeVariant) {
                        print("rebuilt stop announcement picker");
                        return StopAnnouncementPicker(
                          routeVariant: routeVariant,
                          backgroundColor: Colors.grey.shade900,
                          outlineColor: Colors.white70,
                        );
                      },
                      defaultBuilder: (context) {
                        BusRouteVariant? routeVariant = LiveInformation().getRouteVariant();
                        if (routeVariant == null) {
                          return Container(
                            color: Colors.grey.shade900,
                            child: Center(
                              child: Text(
                                "No route selected",
                                style: GoogleFonts.teko(
                                  fontSize: 25,
                                  color: Colors.white70
                                ),
                              ),
                            ),
                          );
                        } else {
                          return StopAnnouncementPicker(
                            routeVariant: routeVariant,
                            backgroundColor: Colors.grey.shade900,
                            outlineColor: Colors.white70,
                          );
                        }
                      },
                    ),
                  ),

                ),

                ElevatedButton(
                  onPressed: () async {
                    LiveInformation liveInformation = LiveInformation();
                    final commandModule = liveInformation.commandModule;

                    // commandModule.executeCommand(
                    //   "announce dest"
                    // );

                    liveInformation.announcementModule.queueAnnouncementByRouteVariant(
                      routeVariant: liveInformation.getRouteVariant()!
                    );

                  },
                  child: Text("Announce current destination"),
                ),


                // Container(
                //
                //   margin: EdgeInsets.all(20),
                //
                //   height: 300-45,
                //
                //   child: ListView(
                //
                //     scrollDirection: Axis.vertical,
                //
                //     children: [
                //
                //       ElevatedButton(
                //         onPressed: () async {
                //           LiveInformation liveInformation = LiveInformation();
                //           liveInformation.queueAnnouncement(await liveInformation.getDestinationAnnouncement(liveInformation.getRouteVariant()!, sendToServer: false));
                //         },
                //         child: Text("Test announcement"),
                //       ),
                //
                //       ElevatedButton(
                //         onPressed: () {
                //           LiveInformation liveInformation = LiveInformation();
                //           liveInformation.updateServer();
                //         },
                //         child: Text("Update server"),
                //       ),
                //
                //       SizedBox(
                //
                //         width: 100,
                //
                //         child: TextField(
                //           onChanged: (String value) {
                //             LiveInformation liveInformation = LiveInformation();
                //             // liveInformation.documentID = value;
                //           },
                //         ),
                //       ),
                //
                //       SizedBox(
                //
                //         width: 200,
                //
                //         child: TextField(
                //           onSubmitted: (String value) {
                //             LiveInformation liveInformation = LiveInformation();
                //             liveInformation.queueAnnouncement(AnnouncementQueueEntry(
                //               displayText: value,
                //               audioSources: []
                //             ));
                //           },
                //         ),
                //       ),
                //
                //       ElevatedButton(
                //         onPressed: () {
                //           LiveInformation liveInformation = LiveInformation();
                //           liveInformation.pullServer();
                //         },
                //         child: Text("Pull server"),
                //       ),
                //
                //     ],
                //
                //   ),
                //
                // ),

              ],
            ),
          ),
        ],
      )

    );
  }
}

class Speedometer extends StatefulWidget {

  @override
  State<Speedometer> createState() => _SpeedometerState();
}



class _SpeedometerState extends State<Speedometer> {

  double speed = 0;
  double arrivalTime = 0;

  BusRouteStop? nearestStop;
  double speed2 = 0;

  _SpeedometerState(){



  }

  @override
  void initState() {
    // TODO: implement initState
    super.initState();

    Timer.periodic(Duration(milliseconds: 250), (timer) {

      Position? newPosition = LiveInformation().trackerModule.position;

      speed = newPosition?.speed ?? 0;

      arrivalTime -= 0.25;
      arrivalTime = arrivalTime < 0 ? 0 : arrivalTime;

      setState(() {

      });
    });

  }

  @override
  Widget build(BuildContext context) {
    // TODO: implement build
    return Container(

      margin: EdgeInsets.all(8),

      height: 74,

      child: Row(
        children: [
          Container(
            // width: 60,
            height: double.infinity,
            alignment: Alignment.center,
            decoration: BoxDecoration(
              border: Border.all(
                color: Colors.white70,
                width: 2
              )
            ),
            padding: const EdgeInsets.all(8),
            child: Column(

              mainAxisSize: MainAxisSize.min,

              children: [

                Container(

                  decoration: BoxDecoration(
                    border: Border.all(
                      color: Colors.white70,
                      width: 2
                    )
                  ),

                  width: 30,
                  height: 30,

                  alignment: Alignment.center,

                  child: Text(
                    "${((speed) * 2.237).toInt()}",
                    style: GoogleFonts.teko(
                      fontSize: 20,
                      color: Colors.white70,
                      height: 1
                    ),
                  )
                ),

                const SizedBox(
                  height: 4,
                ),

                Text(
                  "MPH",
                  style: GoogleFonts.teko(
                    fontSize: 20,
                    color: Colors.white70,
                    height: 1
                  ),
                ),

              ],

            ),
          ),

        ],
      ),

    );
  }
}

class AnnouncementPicker extends StatefulWidget {

  final Color backgroundColor;
  final Color outlineColor;
  final List<Widget> announcements;

  const AnnouncementPicker({super.key, required this.backgroundColor, required this.outlineColor, required this.announcements});

  @override
  State<AnnouncementPicker> createState() => _AnnouncementPickerState();
}

class _AnnouncementPickerState extends State<AnnouncementPicker> {

  List<Widget> announcementWidgets = [];

  int _currentIndex = 0;

  @override
  void initState() {
    // TODO: implement initState
    super.initState();

    LiveInformation liveInformation = LiveInformation();

    if (widget.announcements.isEmpty){
      return;
    }

    int i = 0;
    for (Widget announcement in widget.announcements!) {
      announcementWidgets.add(
        announcement
      );
      i++;
    }

  }


  @override
  Widget build(BuildContext context) {


    return Container(

      decoration: BoxDecoration(
        color: widget.backgroundColor,
        border: Border.all(
          color: widget.outlineColor,
          width: 2
        ),



      ),

      padding: const EdgeInsets.all(4),

      width: double.infinity,

      constraints: const BoxConstraints(
        maxWidth: 400
      ),

      child: Column(
        children: [
          Container(
            height: 2,
            color: widget.outlineColor,
          ),

          if (_currentIndex < announcementWidgets.length)
            announcementWidgets[_currentIndex + 0]
          else
            Container(
              height: 50,
              decoration: BoxDecoration(
                color: widget.backgroundColor,
                border: Border.symmetric(
                    vertical: BorderSide(
                        color: widget.outlineColor,
                        width: 2
                    )
                ),
              ),
            ),

          Container(
            height: 2,
            color: widget.outlineColor,
          ),

          if (_currentIndex + 1 < announcementWidgets.length)
            announcementWidgets[_currentIndex + 1]
          else
            Container(
              height: 50,
              decoration: BoxDecoration(
                color: widget.backgroundColor,
                border: Border.symmetric(
                    vertical: BorderSide(
                        color: widget.outlineColor,
                        width: 2
                    )
                ),
              ),
            ),

          Container(
            height: 2,
            color: widget.outlineColor,
          ),

          if (_currentIndex + 2 < announcementWidgets.length)
            announcementWidgets[_currentIndex + 2]
          else
            Container(
              height: 50,
              decoration: BoxDecoration(
                color: widget.backgroundColor,
                border: Border.symmetric(
                    vertical: BorderSide(
                        color: widget.outlineColor,
                        width: 2
                    )
                ),
              ),
            ),

          Container(
            height: 2,
            color: widget.outlineColor,
          ),

          if (_currentIndex + 3 < announcementWidgets.length)
            announcementWidgets[_currentIndex + 3]
          else
            Container(
              height: 50,
              decoration: BoxDecoration(
                color: widget.backgroundColor,
                border: Border.symmetric(
                    vertical: BorderSide(
                        color: widget.outlineColor,
                        width: 2
                    )
                ),
              ),
            ),

          Container(
            height: 2,
            color: widget.outlineColor,
          ),

          Container(
            height: 40,
            decoration: BoxDecoration(
              color: widget.backgroundColor,
              border: Border.symmetric(
                vertical: BorderSide(
                  color: widget.outlineColor,
                  width: 2
                )
              ),
            ),

            alignment: Alignment.centerRight,

            child: Row(

              mainAxisSize: MainAxisSize.min,

              children: [

                Container(
                    width: 40,
                    height: 40,
                    decoration: BoxDecoration(
                      color: widget.backgroundColor,
                      border: Border.symmetric(
                          vertical: BorderSide(
                              color: widget.outlineColor,
                              width: 2
                          )
                      ),
                    ),

                    margin: const EdgeInsets.symmetric(
                        horizontal: 4
                    ),

                    child: Container(
                      child: Stack(
                        children: [
                          Container(
                            width: 40,
                            height: 40,
                            child: Icon(
                              Icons.arrow_upward,
                              color: widget.outlineColor,
                            ),
                          ),
                          Positioned.fill(
                            child: ElevatedButton(
                              onPressed: () {
                                _currentIndex = wrap(_currentIndex - 4, 0, announcementWidgets.length, increment: 4);
                                setState(() {});
                                print(_currentIndex);
                              },
                              style: ElevatedButton.styleFrom(
                                backgroundColor: Colors.transparent,
                                shadowColor: Colors.transparent,
                                surfaceTintColor: Colors.transparent,
                                foregroundColor: Colors.transparent,
                                shape: RoundedRectangleBorder(
                                  borderRadius: BorderRadius.circular(0),
                                ),
                              ),
                              child: const Text(""),
                            ),
                          )
                        ],
                      ),
                    )

                ),

                Container(
                    width: 40,
                    height: 40,
                    decoration: BoxDecoration(
                      color: widget.backgroundColor,
                      border: Border.symmetric(
                          vertical: BorderSide(
                              color: widget.outlineColor,
                              width: 2
                          )
                      ),
                    ),

                    margin: const EdgeInsets.symmetric(
                        horizontal: 4
                    ),

                    child: Container(
                      child: Stack(
                        children: [
                          Container(
                            width: 40,
                            height: 40,
                            child: Icon(
                              Icons.arrow_downward,
                              color: widget.outlineColor,
                            ),
                          ),
                          Positioned.fill(
                            child: ElevatedButton(
                              onPressed: () {
                                _currentIndex = wrap(_currentIndex + 4, 0, announcementWidgets.length, increment: 4);
                                setState(() {});
                                print(_currentIndex);
                              },
                              style: ElevatedButton.styleFrom(
                                backgroundColor: Colors.transparent,
                                shadowColor: Colors.transparent,
                                surfaceTintColor: Colors.transparent,
                                foregroundColor: Colors.transparent,
                                shape: RoundedRectangleBorder(
                                  borderRadius: BorderRadius.circular(0),
                                ),
                              ),
                              child: const Text(""),
                            ),
                          )
                        ],
                      ),
                    )

                ),

              ]

            ),

          ),
          Container(
            height: 2,
            color: widget.outlineColor,
          ),

        ]
      ),
    );


  }
}

class StopAnnouncementPicker extends AnnouncementPicker {
  final BusRouteVariant routeVariant;

  StopAnnouncementPicker({
    Key? key,
    required this.routeVariant,
    required Color backgroundColor,
    required Color outlineColor,
  }) : super(
    key: key,
    backgroundColor: backgroundColor,
    outlineColor: outlineColor,
    announcements: [
      for (BusRouteStop stop in routeVariant.busStops)
        _AnnouncementEntry(
          label: stop.formattedStopName,
          onPressed: () {
            LiveInformation liveInformation = LiveInformation();
            liveInformation.announcementModule.queueAnnounceByAudioName(
              displayText: stop.formattedStopName,
              audioNames: [stop.getAudioFileName()],
            );
          },
          index: routeVariant.busStops.indexOf(stop),
          outlineColor: outlineColor,
          alert: LiveInformation().announcementModule.announcementCache[stop.getAudioFileName()] == null,
        )
    ]
  );
}

int wrap(int i, int j, int length, {int increment = -1}) {
  if (increment == -1) {
    return ((i - j) % length + length) % length;
  } else {
    if (i >= length) {
      return 0;
    } else if (i < 0) {
      double d = length / increment;
      int n = d.toInt();

      return (n-1) * increment;
    } else {
      return i;
    }
  }
}

class _AnnouncementEntry extends StatelessWidget {

  final String label;

  final Function onPressed;
  final int index;
  final Color outlineColor;

  bool alert = false;

  _AnnouncementEntry({super.key, required this.label, required this.onPressed, required this.index, required this.outlineColor, this.alert = false});

  @override
  Widget build(BuildContext context) {

    return Stack(
      children: [
        Container(

          decoration: BoxDecoration(
            color: Colors.transparent,
            border: Border.symmetric(
              vertical: BorderSide(
               color: outlineColor,
                width: 2
              )
            ),
          ),

          padding: const EdgeInsets.symmetric(
            horizontal: 10,
            vertical: 5
          ),

          width: double.infinity,


          child: Row(
            children: [
              Row(
                children: [
                  Container(

                    constraints: const BoxConstraints(
                      maxWidth: 260
                    ),

                    child: Text(
                      label,
                      style: GoogleFonts.teko(
                        fontSize: 25,
                        color: outlineColor,
                      ),
                      overflow: TextOverflow.ellipsis,
                    ),
                  ),

                  if (alert)
                    const SizedBox(
                      width: 4,
                    ),

                  if (alert)
                    Icon(
                      Icons.error,
                      color: Colors.red.shade800,
                      size: 25,
                      shadows: const [
                        Shadow(
                          color: Colors.black,
                          blurRadius: 2,
                        )
                      ],
                    )
                ],
              ),
              Expanded(
                child: Container(

                  alignment: Alignment.centerRight,

                  child: Text(
                    (index+1).toString(),
                    style: GoogleFonts.teko(
                      fontSize: 25,
                      color: outlineColor,
                    )
                  ),
                ),
              )
            ],
          )

        ),

        Positioned.fill(
          child: ElevatedButton(
            onPressed: () {
              onPressed();
            },
          
            style: ElevatedButton.styleFrom(
              backgroundColor: Colors.transparent,
              shadowColor: Colors.transparent,
              surfaceTintColor: Colors.transparent,
              foregroundColor: Colors.transparent,
              shape: RoundedRectangleBorder(
                borderRadius: BorderRadius.circular(0),
              ),
            ),
          
            child: const Text("More"),
          ),
        )
      ],
    );

  }
}