import 'dart:async';

import 'package:flutter/foundation.dart';
import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

import 'package:async/async.dart';
import 'package:collection/collection.dart';
import 'package:ficonsax/ficonsax.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:screen_brightness/screen_brightness.dart';
import 'package:universal_html/html.dart' as html;
import 'package:window_manager/window_manager.dart';

import 'package:fladder/models/items/intro_skip_model.dart';
import 'package:fladder/models/media_playback_model.dart';
import 'package:fladder/models/playback/playback_model.dart';
import 'package:fladder/providers/settings/client_settings_provider.dart';
import 'package:fladder/providers/settings/video_player_settings_provider.dart';
import 'package:fladder/providers/video_player_provider.dart';
import 'package:fladder/screens/shared/default_titlebar.dart';
import 'package:fladder/screens/video_player/components/video_playback_information.dart';
import 'package:fladder/screens/video_player/components/video_player_controls_extras.dart';
import 'package:fladder/screens/video_player/components/video_player_options_sheet.dart';
import 'package:fladder/screens/video_player/components/video_player_seek_indicator.dart';
import 'package:fladder/screens/video_player/components/video_progress_bar.dart';
import 'package:fladder/screens/video_player/components/video_subtitles.dart';
import 'package:fladder/screens/video_player/components/video_volume_slider.dart';
import 'package:fladder/util/adaptive_layout.dart';
import 'package:fladder/util/duration_extensions.dart';
import 'package:fladder/util/input_handler.dart';
import 'package:fladder/util/list_padding.dart';
import 'package:fladder/util/localization_helper.dart';
import 'package:fladder/util/string_extensions.dart';
import 'package:fladder/widgets/shared/full_screen_button.dart'
    if (dart.library.html) 'package:fladder/widgets/shared/full_screen_button_web.dart';

class DesktopControls extends ConsumerStatefulWidget {
  const DesktopControls({super.key});

  @override
  ConsumerState<ConsumerStatefulWidget> createState() => _DesktopControlsState();
}

class _DesktopControlsState extends ConsumerState<DesktopControls> {
  late RestartableTimer timer = RestartableTimer(
    const Duration(seconds: 5),
    () => mounted ? toggleOverlay(value: false) : null,
  );

  final fadeDuration = const Duration(milliseconds: 350);
  bool showOverlay = true;
  bool wasPlaying = false;

  late final double topPadding = MediaQuery.of(context).viewPadding.top;
  late final double bottomPadding = MediaQuery.of(context).viewPadding.bottom;

  bool _onKey(KeyEvent value) {
    final introSkipModel = ref.read(playBackModel.select((value) => value?.introSkipModel));
    final position = ref.read(mediaPlaybackProvider).position;
    bool showIntroSkipButton = introSkipModel?.introInRange(position) ?? false;
    bool showCreditSkipButton = introSkipModel?.creditsInRange(position) ?? false;
    if (value is KeyRepeatEvent) {
      if (value.logicalKey == LogicalKeyboardKey.arrowUp) {
        resetTimer();
        ref.read(videoPlayerSettingsProvider.notifier).steppedVolume(5);
      }
      if (value.logicalKey == LogicalKeyboardKey.arrowDown) {
        resetTimer();
        ref.read(videoPlayerSettingsProvider.notifier).steppedVolume(-5);
      }
      return true;
    }
    if (value is KeyDownEvent) {
      if (value.logicalKey == LogicalKeyboardKey.keyS) {
        if (showIntroSkipButton) {
          skipIntro(introSkipModel);
        } else if (showCreditSkipButton) {
          skipCredits(introSkipModel);
        }
      }
      if (value.logicalKey == LogicalKeyboardKey.escape) {
        disableFullscreen();
      }
      if (value.logicalKey == LogicalKeyboardKey.space) {
        ref.read(videoPlayerProvider).playOrPause();
      }
      if (value.logicalKey == LogicalKeyboardKey.keyF) {
        toggleFullScreen(ref);
      }
      if (value.logicalKey == LogicalKeyboardKey.arrowUp) {
        resetTimer();
        ref.read(videoPlayerSettingsProvider.notifier).steppedVolume(5);
      }
      if (value.logicalKey == LogicalKeyboardKey.arrowDown) {
        resetTimer();
        ref.read(videoPlayerSettingsProvider.notifier).steppedVolume(-5);
      }
      return true;
    }
    return false;
  }

  @override
  void initState() {
    super.initState();
    timer.reset();
  }

  @override
  Widget build(BuildContext context) {
    final introSkipModel = ref.watch(playBackModel.select((value) => value?.introSkipModel));
    final player = ref.watch(videoPlayerProvider.select((value) => value.controller));
    return InputHandler(
      autoFocus: false,
      onKeyEvent: (node, event) => _onKey(event) ? KeyEventResult.handled : KeyEventResult.ignored,
      child: Listener(
        onPointerSignal: (event) => resetTimer(),
        child: PopScope(
          canPop: false,
          onPopInvokedWithResult: (didPop, result) {
            if (!didPop) {
              closePlayer();
            }
          },
          child: GestureDetector(
            onTap: () => toggleOverlay(),
            child: MouseRegion(
              cursor: showOverlay ? SystemMouseCursors.basic : SystemMouseCursors.none,
              onEnter: (event) => toggleOverlay(value: true),
              onExit: (event) => toggleOverlay(value: false),
              onHover: AdaptiveLayout.of(context).isDesktop || kIsWeb ? (event) => toggleOverlay(value: true) : null,
              child: Stack(
                children: [
                  if (player != null)
                    VideoSubtitles(
                      key: const Key('subtitles'),
                      controller: player,
                      overLayed: showOverlay,
                    ),
                  if (AdaptiveLayout.of(context).isDesktop)
                    Consumer(builder: (context, ref, child) {
                      final playing = ref.watch(mediaPlaybackProvider.select((value) => value.playing));
                      final buffering = ref.watch(mediaPlaybackProvider.select((value) => value.buffering));
                      return playButton(playing, buffering);
                    }),
                  IgnorePointer(
                    ignoring: !showOverlay,
                    child: AnimatedOpacity(
                      duration: fadeDuration,
                      opacity: showOverlay ? 1 : 0,
                      child: Column(
                        children: [
                          topButtons(context),
                          const Spacer(),
                          bottomButtons(context),
                        ],
                      ),
                    ),
                  ),
                  const VideoPlayerSeekIndicator(),
                  Consumer(
                    builder: (context, ref, child) {
                      final position = ref.watch(mediaPlaybackProvider.select((value) => value.position));
                      bool showIntroSkipButton = introSkipModel?.introInRange(position) ?? false;
                      bool showCreditSkipButton = introSkipModel?.creditsInRange(position) ?? false;
                      return Stack(
                        children: [
                          if (showIntroSkipButton)
                            Align(
                              alignment: Alignment.centerRight,
                              child: Padding(
                                padding: const EdgeInsets.all(32),
                                child: IntroSkipButton(
                                  isOverlayVisible: showOverlay,
                                  skipIntro: () => skipIntro(introSkipModel),
                                ),
                              ),
                            ),
                          if (showCreditSkipButton)
                            Align(
                              alignment: Alignment.centerRight,
                              child: Padding(
                                padding: const EdgeInsets.all(32),
                                child: CreditsSkipButton(
                                  isOverlayVisible: showOverlay,
                                  skipCredits: () => skipCredits(introSkipModel),
                                ),
                              ),
                            )
                        ],
                      );
                    },
                  ),
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }

  Widget playButton(bool playing, bool buffering) {
    return Align(
      alignment: Alignment.center,
      child: AnimatedScale(
        curve: Curves.easeInOutCubicEmphasized,
        scale: playing
            ? 0
            : buffering
                ? 0
                : 1,
        duration: const Duration(milliseconds: 250),
        child: IconButton.outlined(
          onPressed: () => ref.read(videoPlayerProvider).play(),
          isSelected: true,
          iconSize: 65,
          tooltip: "Resume video",
          icon: const Icon(IconsaxBold.play),
        ),
      ),
    );
  }

  Widget topButtons(BuildContext context) {
    final currentItem = ref.watch(playBackModel.select((value) => value?.item));
    return Container(
      decoration: BoxDecoration(
          gradient: LinearGradient(
        begin: Alignment.topCenter,
        end: Alignment.bottomCenter,
        colors: [
          Colors.black.withOpacity(0.8),
          Colors.black.withOpacity(0),
        ],
      )),
      child: Stack(
        children: [
          if (AdaptiveLayout.of(context).isDesktop)
            const Align(
              alignment: Alignment.topRight,
              child: DefaultTitleBar(),
            ),
          Padding(
            padding: MediaQuery.paddingOf(context).copyWith(bottom: 0),
            child: Container(
              alignment: Alignment.topCenter,
              height: 80,
              child: Column(
                children: [
                  Padding(
                    padding: const EdgeInsets.symmetric(horizontal: 12),
                    child: Row(
                      crossAxisAlignment: CrossAxisAlignment.center,
                      children: [
                        IconButton(
                          onPressed: () => minimizePlayer(context),
                          icon: const Icon(
                            IconsaxOutline.arrow_down_1,
                            size: 24,
                          ),
                        ),
                        const SizedBox(width: 16),
                        Flexible(
                          child: Text(
                            currentItem?.title ?? "",
                            style: Theme.of(context).textTheme.titleLarge,
                          ),
                        ),
                      ],
                    ),
                  ),
                ],
              ),
            ),
          ),
        ],
      ),
    );
  }

  Widget bottomButtons(BuildContext context) {
    return Consumer(builder: (context, ref, child) {
      final mediaPlayback = ref.watch(mediaPlaybackProvider);
      return Container(
        decoration: BoxDecoration(
            gradient: LinearGradient(
          begin: Alignment.bottomCenter,
          end: Alignment.topCenter,
          colors: [
            Colors.black.withOpacity(0.8),
            Colors.black.withOpacity(0),
          ],
        )),
        child: Padding(
          padding: MediaQuery.paddingOf(context).add(
            const EdgeInsets.symmetric(horizontal: 16).copyWith(bottom: 12),
          ),
          child: Column(
            children: [
              Padding(
                padding: const EdgeInsets.symmetric(horizontal: 12),
                child: progressBar(mediaPlayback),
              ),
              const SizedBox(height: 8),
              Row(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  Flexible(
                    flex: 2,
                    child: Row(
                      children: <Widget>[
                        IconButton(
                            onPressed: () => showVideoPlayerOptions(context, () => minimizePlayer(context)),
                            icon: const Icon(IconsaxOutline.more)),
                        if (AdaptiveLayout.layoutOf(context) == LayoutState.tablet) ...[
                          IconButton(
                            onPressed: () => showSubSelection(context),
                            icon: const Icon(IconsaxOutline.subtitle),
                          ),
                          IconButton(
                            onPressed: () => showAudioSelection(context),
                            icon: const Icon(IconsaxOutline.audio_square),
                          ),
                        ],
                        if (AdaptiveLayout.layoutOf(context) == LayoutState.desktop) ...[
                          Flexible(
                            child: ElevatedButton.icon(
                              onPressed: () => showSubSelection(context),
                              icon: const Icon(IconsaxOutline.subtitle),
                              label: Text(
                                ref.watch(playBackModel.select((value) {
                                      final language = value?.mediaStreams?.currentSubStream?.language;
                                      return language?.isEmpty == true ? context.localized.off : language;
                                    }))?.capitalize() ??
                                    "",
                                maxLines: 1,
                              ),
                            ),
                          ),
                          Flexible(
                            child: ElevatedButton.icon(
                              onPressed: () => showAudioSelection(context),
                              icon: const Icon(IconsaxOutline.audio_square),
                              label: Text(
                                ref.watch(playBackModel.select((value) {
                                      final language = value?.mediaStreams?.currentAudioStream?.language;
                                      return language?.isEmpty == true ? context.localized.off : language;
                                    }))?.capitalize() ??
                                    "",
                                maxLines: 1,
                              ),
                            ),
                          )
                        ],
                      ].addInBetween(const SizedBox(
                        width: 4,
                      )),
                    ),
                  ),
                  previousButton,
                  seekBackwardButton(ref),
                  IconButton.filledTonal(
                    iconSize: 38,
                    onPressed: () {
                      ref.read(videoPlayerProvider).playOrPause();
                    },
                    icon: Icon(
                      mediaPlayback.playing ? IconsaxBold.pause : IconsaxBold.play,
                    ),
                  ),
                  seekForwardButton(ref),
                  nextVideoButton,
                  Flexible(
                    flex: 2,
                    child: Row(
                      mainAxisAlignment: MainAxisAlignment.end,
                      children: [
                        Tooltip(
                            message: "Stop",
                            child: IconButton(onPressed: () => closePlayer(), icon: const Icon(IconsaxOutline.stop))),
                        const Spacer(),
                        if ((AdaptiveLayout.of(context).isDesktop || kIsWeb) &&
                            ref.read(videoPlayerProvider).player != null) ...{
                          // OpenQueueButton(x),
                          // ChapterButton(
                          //   position: position,
                          //   player: ref.read(videoPlayerProvider).player!,
                          // ),
                          Listener(
                            onPointerSignal: (event) {
                              if (event is PointerScrollEvent) {
                                if (event.scrollDelta.dy > 0) {
                                  ref.read(videoPlayerSettingsProvider.notifier).steppedVolume(-5);
                                } else {
                                  ref.read(videoPlayerSettingsProvider.notifier).steppedVolume(5);
                                }
                              }
                            },
                            child: VideoVolumeSlider(
                              onChanged: () => resetTimer(),
                            ),
                          ),
                          const FullScreenButton(),
                        }
                      ].addInBetween(const SizedBox(width: 8)),
                    ),
                  ),
                ].addInBetween(const SizedBox(width: 6)),
              ),
            ],
          ),
        ),
      );
    });
  }

  Widget progressBar(MediaPlaybackModel mediaPlayback) {
    return Consumer(
      builder: (context, ref, child) {
        final playbackModel = ref.watch(playBackModel);
        final item = playbackModel?.item;
        final List<String?> details = [
          if (AdaptiveLayout.of(context).isDesktop) item?.label(context),
          mediaPlayback.duration.inMinutes > 1
              ? context.localized.endsAt(DateTime.now().add(mediaPlayback.duration - mediaPlayback.position))
              : null
        ];
        return Column(
          mainAxisSize: MainAxisSize.min,
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            Row(
              children: [
                Expanded(
                  child: Text(
                    details.whereNotNull().join(' - '),
                    style: Theme.of(context).textTheme.titleMedium?.copyWith(
                      fontWeight: FontWeight.bold,
                      shadows: [
                        const Shadow(blurRadius: 16),
                      ],
                    ),
                    maxLines: 2,
                  ),
                ),
                const Spacer(),
                if (playbackModel.label != null)
                  InkWell(
                    onTap: () => showVideoPlaybackInformation(context),
                    child: Card(
                      child: Padding(
                        padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
                        child: Text(
                          playbackModel?.label ?? "",
                        ),
                      ),
                    ),
                  ),
                if (item != null) ...{
                  Card(
                    child: Padding(
                      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
                      child: Text(
                        '${item.streamModel?.displayProfile?.value} ${item.streamModel?.resolution?.value}',
                      ),
                    ),
                  ),
                }
              ].addPadding(const EdgeInsets.symmetric(horizontal: 4)),
            ),
            const SizedBox(height: 4),
            SizedBox(
              height: 25,
              child: VideoProgressBar(
                wasPlayingChanged: (value) => wasPlaying = value,
                wasPlaying: wasPlaying,
                duration: mediaPlayback.duration,
                position: mediaPlayback.position,
                buffer: mediaPlayback.buffer,
                buffering: mediaPlayback.buffering,
                timerReset: () => timer.reset(),
                onPositionChanged: (position) => ref.read(videoPlayerProvider).seek(position),
              ),
            ),
            const SizedBox(height: 4),
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(
                  mediaPlayback.position.readAbleDuration,
                  style: Theme.of(context).textTheme.bodyMedium,
                ),
                Text(
                  "-${(mediaPlayback.duration - mediaPlayback.position).readAbleDuration}",
                  style: Theme.of(context).textTheme.bodyMedium,
                ),
              ],
            ),
          ],
        );
      },
    );
  }

  Widget get previousButton {
    return Consumer(
      builder: (context, ref, child) {
        final previousVideo = ref.watch(playBackModel.select((value) => value?.previousVideo));
        final buffering = ref.watch(mediaPlaybackProvider.select((value) => value.buffering));

        return Tooltip(
          message: previousVideo?.detailedName(context) ?? "",
          textAlign: TextAlign.center,
          decoration: BoxDecoration(
            borderRadius: BorderRadius.circular(8),
            color: Theme.of(context).colorScheme.surface.withOpacity(0.95),
          ),
          textStyle: Theme.of(context).textTheme.labelLarge,
          child: IconButton(
            onPressed: previousVideo != null && !buffering
                ? () => ref.read(playbackModelHelper).loadNewVideo(previousVideo)
                : null,
            iconSize: 30,
            icon: const Icon(
              IconsaxOutline.backward,
            ),
          ),
        );
      },
    );
  }

  Widget get nextVideoButton {
    return Consumer(
      builder: (context, ref, child) {
        final nextVideo = ref.watch(playBackModel.select((value) => value?.nextVideo));
        final buffering = ref.watch(mediaPlaybackProvider.select((value) => value.buffering));
        return Tooltip(
          message: nextVideo?.detailedName(context) ?? "",
          textAlign: TextAlign.center,
          decoration: BoxDecoration(
            borderRadius: BorderRadius.circular(8),
            color: Theme.of(context).colorScheme.surface.withOpacity(0.95),
          ),
          textStyle: Theme.of(context).textTheme.labelLarge,
          child: IconButton(
            onPressed:
                nextVideo != null && !buffering ? () => ref.read(playbackModelHelper).loadNewVideo(nextVideo) : null,
            iconSize: 30,
            icon: const Icon(
              IconsaxOutline.forward,
            ),
          ),
        );
      },
    );
  }

  Widget seekBackwardButton(WidgetRef ref) {
    return IconButton(
      onPressed: () => seekBack(ref),
      tooltip: "-10",
      iconSize: 40,
      icon: const Icon(
        IconsaxOutline.backward_10_seconds,
      ),
    );
  }

  Widget seekForwardButton(WidgetRef ref) {
    return IconButton(
      onPressed: () => seekForward(ref),
      tooltip: "15",
      iconSize: 40,
      icon: const Stack(
        children: [
          Icon(IconsaxOutline.forward_15_seconds),
        ],
      ),
    );
  }

  void skipIntro(IntroOutSkipModel? introSkipModel) {
    resetTimer();
    final end = introSkipModel?.intro?.end;
    if (end != null) {
      ref.read(videoPlayerProvider).seek(end);
    }
  }

  void skipCredits(IntroOutSkipModel? introSkipModel) {
    resetTimer();
    final end = introSkipModel?.credits?.end;
    if (end != null) {
      ref.read(videoPlayerProvider).seek(end);
    }
  }

  void seekBack(WidgetRef ref, {int seconds = 15}) {
    final mediaPlayback = ref.read(mediaPlaybackProvider);
    resetTimer();
    final newPosition = (mediaPlayback.position.inSeconds - seconds).clamp(0, mediaPlayback.duration.inSeconds);
    ref.read(videoPlayerProvider).seek(Duration(seconds: newPosition));
  }

  void seekForward(WidgetRef ref, {int seconds = 15}) {
    final mediaPlayback = ref.read(mediaPlaybackProvider);
    resetTimer();
    final newPosition = (mediaPlayback.position.inSeconds + seconds).clamp(0, mediaPlayback.duration.inSeconds);
    ref.read(videoPlayerProvider).seek(Duration(seconds: newPosition));
  }

  void toggleOverlay({bool? value}) {
    if (showOverlay == (value ?? !showOverlay)) return;
    setState(() => showOverlay = (value ?? !showOverlay));
    resetTimer();
    SystemChrome.setEnabledSystemUIMode(showOverlay ? SystemUiMode.edgeToEdge : SystemUiMode.leanBack, overlays: []);
    SystemChrome.setSystemUIOverlayStyle(const SystemUiOverlayStyle(
      statusBarColor: Colors.transparent,
      systemNavigationBarColor: Colors.transparent,
      statusBarIconBrightness: Brightness.light,
      systemNavigationBarDividerColor: Colors.transparent,
    ));
  }

  void minimizePlayer(BuildContext context) {
    clearOverlaySettings();
    ref.read(mediaPlaybackProvider.notifier).update((state) => state.copyWith(state: VideoPlayerState.minimized));
    Navigator.of(context).pop();
  }

  void resetTimer() => timer.reset();

  Future<void> closePlayer() async {
    clearOverlaySettings();
    ref.read(videoPlayerProvider).stop();
    Navigator.of(context).pop();
  }

  Future<void> clearOverlaySettings() async {
    toggleOverlay(value: true);
    if (!(AdaptiveLayout.of(context).isDesktop || kIsWeb)) {
      ScreenBrightness().resetScreenBrightness();
    } else {
      disableFullscreen();
    }

    SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle(
      statusBarIconBrightness: ref.read(clientSettingsProvider.select((value) => value.statusBarBrightness(context))),
    ));

    timer.cancel();
  }

  Future<void> disableFullscreen() async {
    resetTimer();
    if (kIsWeb) {
      if (html.document.fullscreenElement != null) {
        html.document.exitFullscreen();
        await Future.delayed(const Duration(milliseconds: 500));
      }
    } else {
      final isFullScreen = await windowManager.isFullScreen();
      if (isFullScreen) {
        await windowManager.setFullScreen(false);
      }
    }
  }
}