import 'dart:async';
import 'dart:math' as math;

import 'package:async/async.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:solian/providers/call.dart';
import 'package:solian/theme.dart';
import 'package:solian/widgets/app_bar_leading.dart';
import 'package:solian/widgets/chat/call/call_controls.dart';
import 'package:solian/widgets/chat/call/call_participant.dart';

class CallScreen extends StatefulWidget {
  const CallScreen({super.key});

  @override
  State<CallScreen> createState() => _CallScreenState();
}

class _CallScreenState extends State<CallScreen> with TickerProviderStateMixin {
  Timer? _timer;
  String _currentDuration = '00:00:00';

  bool _showControls = true;
  CancelableOperation? _hideControlsOperation;

  late final AnimationController _controlsAnimationController =
      AnimationController(
    duration: const Duration(milliseconds: 500),
    vsync: this,
  );
  late final Animation<double> _controlsAnimation = CurvedAnimation(
    parent: _controlsAnimationController,
    curve: Curves.fastOutSlowIn,
  );

  String _parseDuration() {
    final ChatCallProvider provider = Get.find();
    if (provider.current.value == null) return '00:00:00';
    Duration duration =
        DateTime.now().difference(provider.current.value!.createdAt);

    String twoDigits(int n) => n.toString().padLeft(2, '0');
    String formattedTime = '${twoDigits(duration.inHours)}:'
        '${twoDigits(duration.inMinutes.remainder(60))}:'
        '${twoDigits(duration.inSeconds.remainder(60))}';

    return formattedTime;
  }

  void _updateDuration() {
    setState(() {
      _currentDuration = _parseDuration();
    });
  }

  void _toggleControls() {
    if (_showControls) {
      setState(() => _showControls = false);
      _controlsAnimationController.animateTo(0);
      _hideControlsOperation?.cancel();
    } else {
      setState(() => _showControls = true);
      _controlsAnimationController.animateTo(1);
      _planAutoHideControls();
    }
  }

  void _planAutoHideControls() {
    _hideControlsOperation = CancelableOperation.fromFuture(
      Future.delayed(const Duration(seconds: 3), () {
        if (!mounted) return;
        if (_showControls) _toggleControls();
      }),
    );
  }

  @override
  void initState() {
    Get.find<ChatCallProvider>().setupRoom();
    super.initState();

    _updateDuration();
    _planAutoHideControls();
    _timer = Timer.periodic(
      const Duration(seconds: 1),
      (_) => _updateDuration(),
    );
  }

  @override
  void dispose() {
    _controlsAnimationController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    final ChatCallProvider provider = Get.find();

    return Material(
      color: Theme.of(context).colorScheme.surface,
      child: Scaffold(
        appBar: AppBar(
          leading: AppBarLeadingButton.adaptive(context),
          centerTitle: true,
          toolbarHeight: SolianTheme.toolbarHeight(context),
          title: RichText(
            textAlign: TextAlign.center,
            text: TextSpan(children: [
              TextSpan(
                text: 'call'.tr,
                style: Theme.of(context).textTheme.titleLarge,
              ),
              const TextSpan(text: '\n'),
              TextSpan(
                text: _currentDuration,
                style: Theme.of(context).textTheme.bodySmall,
              ),
            ]),
          ),
        ),
        body: SafeArea(
          child: GestureDetector(
            behavior: HitTestBehavior.translucent,
            child: Obx(
              () => Stack(
                children: [
                  Column(
                    children: [
                      Expanded(
                        child: Container(
                          color: Theme.of(context).colorScheme.surfaceContainer,
                          child: provider.focusTrack.value != null
                              ? InteractiveParticipantWidget(
                                  isFixed: false,
                                  participant: provider.focusTrack.value!,
                                  onTap: () {},
                                )
                              : const SizedBox(),
                        ),
                      ),
                      if (provider.room.localParticipant != null)
                        SizeTransition(
                          sizeFactor: _controlsAnimation,
                          axis: Axis.vertical,
                          child: SizedBox(
                            width: MediaQuery.of(context).size.width,
                            child: ControlsWidget(
                              provider.room,
                              provider.room.localParticipant!,
                            ),
                          ),
                        ),
                    ],
                  ),
                  Positioned(
                    left: 0,
                    right: 0,
                    top: 0,
                    child: SizedBox(
                      height: 128,
                      child: ListView.builder(
                        scrollDirection: Axis.horizontal,
                        itemCount:
                            math.max(0, provider.participantTracks.length),
                        itemBuilder: (BuildContext context, int index) {
                          final track = provider.participantTracks[index];
                          if (track.participant.sid ==
                              provider.focusTrack.value?.participant.sid) {
                            return Container();
                          }

                          return Padding(
                            padding: const EdgeInsets.only(top: 8, left: 8),
                            child: ClipRRect(
                              borderRadius:
                                  const BorderRadius.all(Radius.circular(8)),
                              child: InteractiveParticipantWidget(
                                isFixed: true,
                                width: 120,
                                height: 120,
                                color: Theme.of(context).cardColor,
                                participant: track,
                                onTap: () {
                                  if (track.participant.sid !=
                                      provider
                                          .focusTrack.value?.participant.sid) {
                                    provider.changeFocusTrack(track);
                                  }
                                },
                              ),
                            ),
                          );
                        },
                      ),
                    ),
                  ),
                ],
              ),
            ),
            onTap: () {
              _toggleControls();
            },
          ),
        ),
      ),
    );
  }

  @override
  void deactivate() {
    _timer?.cancel();
    _timer = null;
    super.deactivate();
  }

  @override
  void activate() {
    _timer ??= Timer.periodic(
      const Duration(seconds: 1),
      (_) => _updateDuration(),
    );
    super.activate();
  }
}