import 'dart:io';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_mobx/flutter_mobx.dart';
import 'package:frosty/apis/bttv_api.dart';
import 'package:frosty/apis/ffz_api.dart';
import 'package:frosty/apis/seventv_api.dart';
import 'package:frosty/apis/twitch_api.dart';
import 'package:frosty/constants.dart';
import 'package:frosty/screens/channel/chat/chat.dart';
import 'package:frosty/screens/channel/chat/details/chat_details_store.dart';
import 'package:frosty/screens/channel/chat/stores/chat_assets_store.dart';
import 'package:frosty/screens/channel/chat/stores/chat_store.dart';
import 'package:frosty/screens/channel/video/video.dart';
import 'package:frosty/screens/channel/video/video_bar.dart';
import 'package:frosty/screens/channel/video/video_overlay.dart';
import 'package:frosty/screens/channel/video/video_store.dart';
import 'package:frosty/screens/settings/stores/auth_store.dart';
import 'package:frosty/screens/settings/stores/settings_store.dart';
import 'package:frosty/theme.dart';
import 'package:frosty/widgets/app_bar.dart';
import 'package:frosty/widgets/notification.dart';
import 'package:provider/provider.dart';
import 'package:simple_pip_mode/actions/pip_actions_layout.dart';
import 'package:simple_pip_mode/pip_widget.dart';

/// Creates a widget that shows the video stream (if live) and chat of the given user.
class VideoChat extends StatefulWidget {
  final String userId;
  final String userName;
  final String userLogin;

  const VideoChat({
    Key? key,
    required this.userId,
    required this.userName,
    required this.userLogin,
  }) : super(key: key);

  @override
  State<VideoChat> createState() => _VideoChatState();
}

class _VideoChatState extends State<VideoChat> {
  final _videoKey = GlobalKey();
  final _chatKey = GlobalKey();

  late final ChatStore _chatStore = ChatStore(
    channelName: widget.userLogin,
    channelId: widget.userId,
    displayName: widget.userName,
    auth: context.read<AuthStore>(),
    settings: context.read<SettingsStore>(),
    chatDetailsStore: ChatDetailsStore(
      twitchApi: context.read<TwitchApi>(),
      channelName: widget.userLogin,
    ),
    assetsStore: ChatAssetsStore(
      twitchApi: context.read<TwitchApi>(),
      ffzApi: context.read<FFZApi>(),
      bttvApi: context.read<BTTVApi>(),
      sevenTVApi: context.read<SevenTVApi>(),
    ),
  );

  late final VideoStore _videoStore = VideoStore(
    userLogin: widget.userLogin,
    twitchApi: context.read<TwitchApi>(),
    authStore: context.read<AuthStore>(),
    settingsStore: context.read<SettingsStore>(),
  );

  @override
  Widget build(BuildContext context) {
    final orientation = MediaQuery.of(context).orientation;

    final settingsStore = _chatStore.settings;

    final appBar = FrostyAppBar(
      title: Text(
        regexEnglish.hasMatch(_chatStore.displayName)
            ? _chatStore.displayName
            : '${_chatStore.displayName} (${_chatStore.channelName})',
      ),
    );

    final player = GestureDetector(
      onLongPress: _videoStore.handleToggleOverlay,
      child: Video(
        key: _videoKey,
        videoStore: _videoStore,
      ),
    );

    final overlay = GestureDetector(
      onLongPress: _videoStore.handleToggleOverlay,
      onDoubleTap: orientation == Orientation.landscape
          ? () => settingsStore.fullScreen = !settingsStore.fullScreen
          : null,
      onTap: () {
        if (_chatStore.assetsStore.showEmoteMenu) {
          _chatStore.assetsStore.showEmoteMenu = false;
        } else {
          if (_chatStore.textFieldFocusNode.hasFocus) {
            _chatStore.textFieldFocusNode.unfocus();
          } else {
            _videoStore.handleVideoTap();
          }
        }
      },
      child: Observer(
        builder: (_) {
          final videoOverlay = VideoOverlay(
            videoStore: _videoStore,
            chatStore: _chatStore,
          );

          if (_videoStore.paused || _videoStore.streamInfo == null) {
            return videoOverlay;
          }

          return AnimatedOpacity(
            opacity: _videoStore.overlayVisible ? 1.0 : 0.0,
            curve: Curves.ease,
            duration: const Duration(milliseconds: 200),
            child: Container(
              decoration: BoxDecoration(
                color: Colors.black.withOpacity(settingsStore.overlayOpacity),
              ),
              child: IgnorePointer(
                ignoring: !_videoStore.overlayVisible,
                child: videoOverlay,
              ),
            ),
          );
        },
      ),
    );

    final video = Observer(
      builder: (context) {
        if (!_videoStore.settingsStore.showOverlay) return player;

        return Stack(
          children: [
            player,
            overlay,
          ],
        );
      },
    );

    final chat = Observer(
      builder: (context) {
        final videoBarVisible = _videoStore.streamInfo != null &&
            _chatStore.settings.showVideo &&
            (_videoStore.paused || _videoStore.overlayVisible);

        return Stack(
          children: [
            Chat(
              key: _chatKey,
              chatStore: _chatStore,
            ),
            if (orientation == Orientation.portrait)
              AnimatedOpacity(
                opacity: videoBarVisible ? 1 : 0,
                curve: Curves.ease,
                duration: const Duration(milliseconds: 200),
                child: IgnorePointer(
                  ignoring: !videoBarVisible,
                  child: ColoredBox(
                    color: Theme.of(context).scaffoldBackgroundColor,
                    child: Column(
                      mainAxisSize: MainAxisSize.min,
                      children: [
                        if (_videoStore.streamInfo != null)
                          VideoBar(
                            streamInfo: _videoStore.streamInfo!,
                            tappableCategory: false,
                          ),
                        const Divider(),
                      ],
                    ),
                  ),
                ),
              ),
            AnimatedSwitcher(
              duration: const Duration(milliseconds: 200),
              switchInCurve: Curves.easeOut,
              switchOutCurve: Curves.easeIn,
              child: _chatStore.notification != null
                  ? Align(
                      alignment: _chatStore.settings.chatNotificationsOnBottom
                          ? Alignment.bottomCenter
                          : Alignment.topCenter,
                      child: FrostyNotification(
                        message: _chatStore.notification!,
                        showPasteButton:
                            _chatStore.notification!.contains('copied'),
                        onButtonPressed: () async {
                          // Paste clipboard text into the text controller.
                          final data =
                              await Clipboard.getData(Clipboard.kTextPlain);

                          if (data != null) {
                            _chatStore.textController.text = data.text!;
                          }

                          _chatStore.updateNotification('');
                        },
                      ),
                    )
                  : null,
            ),
          ],
        );
      },
    );

    final videoChat = Scaffold(
      body: Observer(
        builder: (context) {
          if (orientation == Orientation.landscape &&
              !settingsStore.landscapeForceVerticalChat) {
            SystemChrome.setEnabledSystemUIMode(SystemUiMode.immersiveSticky);

            final landscapeChat = AnimatedContainer(
              curve: Curves.ease,
              duration: const Duration(milliseconds: 200),
              width: _chatStore.expandChat
                  ? MediaQuery.of(context).size.width / 2
                  : MediaQuery.of(context).size.width *
                      _chatStore.settings.chatWidth,
              color: _chatStore.settings.fullScreen
                  ? Colors.black.withOpacity(
                      _chatStore.settings.fullScreenChatOverlayOpacity,
                    )
                  : Theme.of(context).scaffoldBackgroundColor,
              child: chat,
            );

            final overlayChat = Visibility(
              visible: settingsStore.fullScreenChatOverlay,
              maintainState: true,
              child: Theme(
                data: FrostyThemes().dark,
                child: DefaultTextStyle(
                  style: DefaultTextStyle.of(context)
                      .style
                      .copyWith(color: Colors.white),
                  child: landscapeChat,
                ),
              ),
            );

            return ColoredBox(
              color: settingsStore.showVideo
                  ? Colors.black
                  : Theme.of(context).scaffoldBackgroundColor,
              child: SafeArea(
                bottom: false,
                left: (settingsStore.landscapeCutout ==
                            LandscapeCutoutType.both ||
                        settingsStore.landscapeCutout ==
                            LandscapeCutoutType.left)
                    ? false
                    : true,
                right: (settingsStore.landscapeCutout ==
                            LandscapeCutoutType.both ||
                        settingsStore.landscapeCutout ==
                            LandscapeCutoutType.right)
                    ? false
                    : true,
                child: settingsStore.showVideo
                    ? settingsStore.fullScreen
                        ? Stack(
                            children: [
                              player,
                              if (settingsStore.showOverlay)
                                Row(
                                  children: settingsStore.landscapeChatLeftSide
                                      ? [overlayChat, Expanded(child: overlay)]
                                      : [Expanded(child: overlay), overlayChat],
                                ),
                            ],
                          )
                        : Row(
                            children: settingsStore.landscapeChatLeftSide
                                ? [landscapeChat, Expanded(child: video)]
                                : [Expanded(child: video), landscapeChat],
                          )
                    : Column(
                        children: [appBar, Expanded(child: chat)],
                      ),
              ),
            );
          }

          SystemChrome.setEnabledSystemUIMode(
            SystemUiMode.manual,
            overlays: SystemUiOverlay.values,
          );
          return SafeArea(
            child: Column(
              children: [
                if (!settingsStore.showVideo)
                  appBar
                else
                  AspectRatio(aspectRatio: 16 / 9, child: video),
                Expanded(child: chat),
              ],
            ),
          );
        },
      ),
    );

    // If on Android, use PiPSwitcher to enable PiP functionality.
    if (Platform.isAndroid) {
      return PipWidget(
        pipLayout: PipActionsLayout.media_only_pause,
        onPipAction: (_) => _videoStore.handlePausePlay(),
        pipChild: player,
        child: videoChat,
      );
    }

    return videoChat;
  }

  @override
  void dispose() {
    _chatStore.dispose();

    _videoStore.dispose();

    SystemChrome.setEnabledSystemUIMode(
      SystemUiMode.manual,
      overlays: SystemUiOverlay.values,
    );

    SystemChrome.setPreferredOrientations([]);

    super.dispose();
  }
}