import 'package:flutter/material.dart';
import 'package:video_player/video_player.dart';
import 'package:f0ckapp/models/mediaitem_detail.dart';
import 'package:f0ckapp/services/api.dart';

class DetailView extends StatefulWidget {
  final MediaItemDetail details;

  const DetailView({super.key, required this.details});

  @override
  State<DetailView> createState() => _DetailViewState();
}

class _DetailViewState extends State<DetailView> {
  late VideoPlayerController _controller;
  late Future<void> _initializeVideoPlayer;
  bool isAudio = false;

  @override
  void initState() {
    super.initState();
    isAudio = widget.details.mime.startsWith("audio/");
    _controller = VideoPlayerController.networkUrl(
      Uri.parse(widget.details.mediaUrl),
    );

    if (!widget.details.mime.startsWith("image/")) {
      _initializeVideoPlayer = _controller
          .initialize()
          .then((_) {
            setState(() {
              _controller.play();
              _controller.setLooping(true);
            });
          })
          .catchError((error) {
            ScaffoldMessenger.of(context).showSnackBar(
              SnackBar(content: Text("Fehler beim Laden des Videos: $error")),
            );
          });
    }
  }

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

  Future<void> _loadNewMediaItem(int itemId, bool swipeLeft) async {
    try {
      var newDetails = await fetchMediaDetail(itemId);

      Navigator.of(context).pushReplacement(
        PageRouteBuilder(
          pageBuilder: (context, animation, secondaryAnimation) =>
              DetailView(details: newDetails),
          transitionsBuilder: (context, animation, secondaryAnimation, child) {
            Offset begin = swipeLeft
                ? const Offset(-1.0, 0.0)
                : const Offset(1.0, 0.0);
            const Offset end = Offset.zero;
            const curve = Curves.easeInOut;

            var tween = Tween(
              begin: begin,
              end: end,
            ).chain(CurveTween(curve: curve));
            var offsetAnimation = animation.drive(tween);

            return SlideTransition(position: offsetAnimation, child: child);
          },
        ),
      );
    } catch (error) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text("Fehler beim Laden des Items: $error")),
      );
    }
  }

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onHorizontalDragEnd: (details) {
        if (details.velocity.pixelsPerSecond.dx > 0) {
          _loadNewMediaItem(widget.details.next, true);
        } else if (details.velocity.pixelsPerSecond.dx < 0) {
          _loadNewMediaItem(widget.details.prev, false);
        }
      },
      child: Scaffold(
        appBar: AppBar(
          backgroundColor: const Color(0xFF2B2B2B),
          foregroundColor: Colors.white,
          title: Text('f0ck #${widget.details.id}'),
          centerTitle: true,
        ),
        body: SingleChildScrollView(
          child: Column(
            children: [
              if (widget.details.mime.contains(
                RegExp(r'image/(jpeg|png|gif|webp)'),
              )) ...[
                Image.network(widget.details.mediaUrl),
              ] else ...[
                Stack(
                  alignment: Alignment.center,
                  children: [
                    if (isAudio)
                      Image.network(
                        'https://f0ck.me/ca/${widget.details.id}.webp',
                      ),
                    FutureBuilder(
                      future: _initializeVideoPlayer,
                      builder: (context, snapshot) {
                        if (snapshot.connectionState == ConnectionState.done &&
                            _controller.value.isInitialized) {
                          return AspectRatio(
                            aspectRatio: isAudio
                                ? 1
                                : _controller.value.aspectRatio,
                            child: VideoPlayer(_controller),
                          );
                        } else {
                          return const CircularProgressIndicator();
                        }
                      },
                    ),
                  ],
                ),
                Padding(
                  padding: const EdgeInsets.symmetric(vertical: 8.0),
                  child: VideoProgressIndicator(
                    _controller,
                    allowScrubbing: true,
                  ),
                ),
                Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [
                    IconButton(
                      icon: const Icon(Icons.replay_10),
                      onPressed: () {
                        _controller.seekTo(
                          _controller.value.position -
                              const Duration(seconds: 10),
                        );
                      },
                    ),
                    IconButton(
                      icon: Icon(
                        _controller.value.isPlaying
                            ? Icons.pause
                            : Icons.play_arrow,
                      ),
                      onPressed: () {
                        setState(() {
                          _controller.value.isPlaying
                              ? _controller.pause()
                              : _controller.play();
                        });
                      },
                    ),
                    IconButton(
                      icon: const Icon(Icons.forward_10),
                      onPressed: () {
                        _controller.seekTo(
                          _controller.value.position +
                              const Duration(seconds: 10),
                        );
                      },
                    ),
                  ],
                ),
              ],
              const SizedBox(height: 16),
              Padding(
                padding: const EdgeInsets.all(16.0),
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(
                      '${widget.details.mime}',
                      style: const TextStyle(fontSize: 16, color: Colors.white),
                    ),
                    Text(
                      "Benutzername: ${widget.details.username}",
                      style: const TextStyle(fontSize: 16, color: Colors.white),
                    ),
                    Text(
                      "Zeitstempel: ${widget.details.stamp}",
                      style: const TextStyle(fontSize: 16, color: Colors.white),
                    ),
                  ],
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}