xtremobile/lib/mobile/features/iptv/screens/lite_player_screen.dart

import 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:video_player/video_player.dart';
import 'package:cached_network_image/cached_network_image.dart';
import 'package:xtremflow/mobile/widgets/tv_focusable.dart';
import 'package:path_provider/path_provider.dart';
import 'package:xtremflow/core/models/iptv_models.dart';
import 'package:xtremflow/core/models/playlist_config.dart';
import 'package:xtremflow/features/iptv/services/xtream_service_mobile.dart';
import 'package:xtremflow/mobile/providers/mobile_settings_providers.dart';
import 'package:xtremflow/core/theme/app_colors.dart';
import 'package:xtremflow/mobile/providers/mobile_xtream_providers.dart';
import 'package:xtremflow/mobile/features/iptv/screens/native_player_screen.dart' show StreamType;
import 'package:xtremflow/features/iptv/models/xtream_models.dart' as xm;

/// Lite version of the player using standard video_player (ExoPlayer on Android)
/// Targeted for 1GB RAM devices where MPV is too heavy.
class LitePlayerScreen extends ConsumerStatefulWidget {
  final String streamId;
  final String title;
  final StreamType streamType;
  final String? containerExtension;
  final PlaylistConfig playlist;
  final List<Channel>? channels;
  final int initialIndex;
  
  // For series episodes
  final dynamic seriesId;
  final int? season;
  final int? episodeNum;

  const LitePlayerScreen({
    super.key,
    required this.streamId,
    required this.title,
    required this.playlist,
    required this.streamType,
    this.containerExtension,
    this.channels,
    this.initialIndex = 0,
    this.seriesId,
    this.season,
    this.episodeNum,
  });

  @override
  ConsumerState<LitePlayerScreen> createState() => _LitePlayerScreenState();
}

class _LitePlayerScreenState extends ConsumerState<LitePlayerScreen> with WidgetsBindingObserver {
  VideoPlayerController? _controller;
  XtreamServiceMobile? _xtreamService;
  
  bool _isLoading = true;
  String? _errorMessage;
  late int _currentIndex;
  bool _showControls = true;
  bool _isPlaying = false;
  
  // EPG
  xm.ShortEPG? _epg;
  Timer? _epgTimer;
  
  // Progress & Seeking
  Duration _position = Duration.zero;
  Duration _duration = Duration.zero;
  bool _isSeeking = false;
  
  // Focus Nodes
  final FocusNode _playPauseFocusNode = FocusNode();
  final FocusNode _backFocusNode = FocusNode();

  Timer? _controlsTimer;
  Timer? _clockTimer;
  String _currentTime = '';

  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addObserver(this);
    HardwareKeyboard.instance.addHandler(_handleKeyEvent);
    
    _currentIndex = widget.initialIndex;
    _startClock();
    
    // Lock orientation
    SystemChrome.setPreferredOrientations([
      DeviceOrientation.landscapeLeft,
      DeviceOrientation.landscapeRight,
    ]);
    SystemChrome.setEnabledSystemUIMode(SystemUiMode.immersiveSticky);

    _initializeService();
  }

  Future<void> _initializeService() async {
    try {
      final dir = await getApplicationDocumentsDirectory();
      _xtreamService = XtreamServiceMobile(dir.path);
      await _xtreamService!.setPlaylistAsync(widget.playlist);
      _loadStream();
      _updateEPG(); // Initial Load
      
      // Update EPG periodically for Live TV
      if (widget.streamType == StreamType.live) {
        _epgTimer = Timer.periodic(const Duration(minutes: 5), (_) => _updateEPG());
      }
    } catch (e) {
      if (mounted) setState(() => _errorMessage = "Service Error: $e");
    }
  }
  
  Future<void> _updateEPG() async {
    if (widget.streamType != StreamType.live || _xtreamService == null) return;
    
    try {
      final currentChannelId = widget.channels?[_currentIndex].streamId ?? widget.streamId;
      // Get EPG for current channel
      final epgData = await _xtreamService!.getShortEPG(currentChannelId);
      if (mounted) {
        setState(() => _epg = epgData);
      }
    } catch (_) {}
  }

  Future<void> _loadStream() async {
    if (_xtreamService == null) return;

    // cleanup previous
    await _controller?.dispose();
    _controller = null;

    if (!mounted) return;
    setState(() {
      _isLoading = true;
      _errorMessage = null;
    });

    try {
      final currentStreamId = widget.channels != null && widget.channels!.isNotEmpty
          ? widget.channels![_currentIndex].streamId 
          : widget.streamId;
          
      // Update EPG when changing channels
      if (widget.streamType == StreamType.live) {
         _updateEPG();
      }

      String streamUrl;
      if (widget.streamType == StreamType.live) {
        streamUrl = _xtreamService!.getLiveStreamUrl(currentStreamId);
      } else if (widget.streamType == StreamType.vod) {
        streamUrl = _xtreamService!.getVodStreamUrl(currentStreamId, widget.containerExtension ?? 'mp4');
      } else {
        streamUrl = _xtreamService!.getSeriesStreamUrl(currentStreamId, widget.containerExtension ?? 'mp4');
      }

      final controller = VideoPlayerController.networkUrl(
        Uri.parse(streamUrl),
        httpHeaders: {'User-Agent': 'XtremFlow/1.0'},
      );

      _controller = controller;
      await controller.initialize();
      
      if (!mounted) {
        await controller.dispose();
        return;
      }

      await controller.play();
      setState(() {
        _isLoading = false;
        _isPlaying = true;
        _duration = controller.value.duration;
      });
      _resetControlsTimer();
      
      // Listen for errors and completion via controller listener
      controller.addListener(_videoListener);
      
    } catch (e) {
      if (mounted) {
        setState(() {
          _isLoading = false;
          _errorMessage = "Playback Error: $e";
        });
      }
    }
  }

  void _videoListener() {
    if (_controller == null || !mounted) return;
    
    // Update Play/Pause state
    final isPlaying = _controller!.value.isPlaying;
    if (isPlaying != _isPlaying) {
      setState(() => _isPlaying = isPlaying);
    }
    
    // Update Duration/Position (if not seeking)
    if (!_isSeeking) {
        final pos = _controller!.value.position;
        final dur = _controller!.value.duration;
        if (pos != _position || dur != _duration) {
             setState(() {
               _position = pos;
               _duration = dur;
             });
        }
    }
    
    if (_controller!.value.hasError) {
      setState(() => _errorMessage = _controller!.value.errorDescription);
    }
  }

  void _onUserInteraction() {
    setState(() => _showControls = true);
    _resetControlsTimer();
  }

  void _resetControlsTimer() {
    _controlsTimer?.cancel();
    if (_showControls && _isPlaying) {
      _controlsTimer = Timer(const Duration(seconds: 5), () {
        if (mounted) setState(() => _showControls = false);
      });
    }
  }

  void _togglePlayPause() {
    if (_controller == null) return;
    if (_controller!.value.isPlaying) {
      _controller!.pause();
    } else {
      _controller!.play();
    }
    _onUserInteraction();
  }
  
  void _playNext() {
    if (widget.channels == null || widget.channels!.isEmpty) return;
    final nextIndex = (_currentIndex + 1) % widget.channels!.length;
    _switchChannel(nextIndex);
  }

  void _playPrevious() {
    if (widget.channels == null || widget.channels!.isEmpty) return;
    final prevIndex = (_currentIndex - 1 + widget.channels!.length) % widget.channels!.length;
    _switchChannel(prevIndex);
  }

  void _switchChannel(int index) {
    setState(() => _currentIndex = index);
    _loadStream();
  }
  
  Future<void> _seek(Duration offset) async {
    if (_controller == null || !_controller!.value.isInitialized) return;
    final newPos = _controller!.value.position + offset;
    final clamped = Duration(
       milliseconds: newPos.inMilliseconds.clamp(0, _controller!.value.duration.inMilliseconds)
    );
    await _controller!.seekTo(clamped);
    _onUserInteraction();
  }

  // Simplified Key Handler
  bool _handleKeyEvent(KeyEvent event) {
    if (event is! KeyDownEvent) return false;
    final key = event.logicalKey;
    
    // Media Keys (Remote)
    if (key == LogicalKeyboardKey.mediaPlay || key == LogicalKeyboardKey.mediaPause || key == LogicalKeyboardKey.mediaPlayPause) {
       _togglePlayPause();
       return true;
    }

    if (key == LogicalKeyboardKey.select || key == LogicalKeyboardKey.enter || key == LogicalKeyboardKey.space) {
       if (!_showControls) {
         _onUserInteraction();
         return true;
       }
       // If controls visible, let focus system handle it
       return false;
    }
    
    // Seek / Channel Change

    if (key == LogicalKeyboardKey.arrowDown || key == LogicalKeyboardKey.channelDown) {
      // User requested "Down" => Previous Channel (Index - 1)
      if (widget.streamType == StreamType.live) {
         _playPrevious();
         _onUserInteraction(); // Show OSD
      }
      return true;
    }

    if (key == LogicalKeyboardKey.arrowUp || key == LogicalKeyboardKey.channelUp) { 
        // User requested "Up" => Next Channel (Index + 1)
        if (widget.streamType == StreamType.live) {
           _playNext();
           _onUserInteraction(); // Show OSD
        } 
        return true;
    }
    if (widget.streamType != StreamType.live) {
      if (key == LogicalKeyboardKey.arrowLeft) {
         _seek(const Duration(seconds: -10));
         return true;
      }
      if (key == LogicalKeyboardKey.arrowRight) {
         _seek(const Duration(seconds: 10));
         return true;
      }
    }
    
    if (key == LogicalKeyboardKey.escape || key == LogicalKeyboardKey.goBack) {
      if (_showControls) {
        setState(() => _showControls = false); 
      } else {
        // Force pop completely to return to list, not just playlist selection
        // Check navigator stack if needed, but standard pop should work if pushed correctly
        Navigator.pop(context);
      }
      return true;
    }

    return false;
  }
  
  void _startClock() {
    _updateTime();
    _clockTimer = Timer.periodic(const Duration(seconds: 1), (_) => _updateTime());
  }
  
  void _updateTime() {
    if (mounted) {
      final now = DateTime.now();
      setState(() {
        _currentTime = "${now.hour.toString().padLeft(2, '0')}:${now.minute.toString().padLeft(2, '0')}";
      });
    }
  }

  @override
  void dispose() {
    WidgetsBinding.instance.removeObserver(this);
    HardwareKeyboard.instance.removeHandler(_handleKeyEvent);
    _controlsTimer?.cancel();
    _clockTimer?.cancel();
    _epgTimer?.cancel();
    _controller?.dispose();
    _xtreamService?.dispose();
    _playPauseFocusNode.dispose();
    _backFocusNode.dispose();
    
    SystemChrome.setPreferredOrientations([
      DeviceOrientation.portraitUp,
      DeviceOrientation.landscapeLeft,
      DeviceOrientation.landscapeRight,
    ]);
    SystemChrome.setEnabledSystemUIMode(SystemUiMode.edgeToEdge);
    super.dispose();
  }

  String _formatDuration(Duration duration) {
    String twoDigits(int n) => n.toString().padLeft(2, '0');
    String twoDigitMinutes = twoDigits(duration.inMinutes.remainder(60));
    String twoDigitSeconds = twoDigits(duration.inSeconds.remainder(60));
    return "${twoDigits(duration.inHours)}:$twoDigitMinutes:$twoDigitSeconds";
  }

  @override
  Widget build(BuildContext context) {
    final title = widget.channels != null && widget.channels!.isNotEmpty 
        ? widget.channels![_currentIndex].name 
        : widget.title;

    return Scaffold(
      backgroundColor: Colors.black,
      body: GestureDetector(
        behavior: HitTestBehavior.opaque,
        onTap: _onUserInteraction,
        child: Stack(
          children: [
            Center(
              child: _controller != null && _controller!.value.isInitialized
                  ? AspectRatio(
                      aspectRatio: _controller!.value.aspectRatio,
                      child: VideoPlayer(_controller!),
                    )
                  : const CircularProgressIndicator(color: AppColors.primary),
            ),
            
            if (_errorMessage != null)
              Center(child: Text(_errorMessage!, style: const TextStyle(color: Colors.red))),

            if (_showControls)
              _buildControls(title),
          ],
        ),
      ),
    );
  }
  
  Widget _buildControls(String title) {
    return Stack(
      children: [
        // Top Bar
        Positioned(
          top: 0, left: 0, right: 0,
          child: Container(
            color: Colors.black54,
            padding: const EdgeInsets.symmetric(vertical: 8, horizontal: 16),
            child: Row(
              children: [
                 TVFocusable(
                   focusNode: _backFocusNode,
                   onPressed: () => Navigator.pop(context),
                   child: const Icon(Icons.arrow_back, color: Colors.white),
                 ),
                 const SizedBox(width: 16),
                 // Icon
                 if (widget.channels != null && widget.channels![_currentIndex].streamIcon.isNotEmpty)
                   Padding(
                     padding: const EdgeInsets.only(right: 12),
                     child: SizedBox(
                       width: 32, 
                       height: 32,
                       child: CachedNetworkImage(
                         imageUrl: widget.channels![_currentIndex].streamIcon,
                         errorWidget: (_,__,___) => const SizedBox.shrink(),
                       ),
                     ),
                   ),
                 Text('LITE PLAYER: $title', style: const TextStyle(color: Colors.white, fontWeight: FontWeight.bold)),
                 const Spacer(),
                 Text(_currentTime, style: const TextStyle(color: Colors.white70)),
              ],
            ),
          ),
        ),
        
        // Center Controls
        Center(
          child: Row(
            mainAxisSize: MainAxisSize.min,
            children: [
              if (widget.streamType == StreamType.live) ...[
                 IconButton(
                   icon: const Icon(Icons.keyboard_arrow_up, color: Colors.white, size: 40),
                   onPressed: _playPrevious,
                 ),
                 const SizedBox(width: 32),
              ] else ...[
                 IconButton(
                   icon: const Icon(Icons.replay_10, color: Colors.white, size: 40),
                   onPressed: () => _seek(const Duration(seconds: -10)),
                 ),
                 const SizedBox(width: 32),
              ],
              
              TVFocusable(
                focusNode: _playPauseFocusNode,
                onPressed: _togglePlayPause,
                child: Icon(
                  _isPlaying ? Icons.pause_circle_filled : Icons.play_circle_filled,
                  color: AppColors.primary,
                  size: 64,
                ),
              ),

              if (widget.streamType == StreamType.live) ...[
                 const SizedBox(width: 32),
                 IconButton(
                   icon: const Icon(Icons.keyboard_arrow_down, color: Colors.white, size: 40),
                   onPressed: _playNext,
                 ),
              ] else ...[
                 const SizedBox(width: 32),
                 IconButton(
                   icon: const Icon(Icons.forward_10, color: Colors.white, size: 40),
                   onPressed: () => _seek(const Duration(seconds: 10)),
                 ),
              ],
            ],
          ),
        ),
        
        // EPG Content (Bottom Left)
        if (widget.streamType == StreamType.live && _epg != null && _epg!.nowPlaying != null)
              Positioned(
                bottom: 80, // Above progress/bottom bar
                left: 24,
                width: 350, 
                child: Container(
                        padding: const EdgeInsets.all(12),
                        decoration: BoxDecoration(
                          color: Colors.black.withOpacity(0.7),
                          borderRadius: BorderRadius.circular(8),
                          border: Border.all(color: Colors.white24),
                        ),
                        child: Row(
                         children: [
                           Expanded(
                             child: Column(
                               crossAxisAlignment: CrossAxisAlignment.start,
                               mainAxisSize: MainAxisSize.min,
                               children: [
                                 Text(
                                   _epg!.nowPlaying!,
                                   style: const TextStyle(color: Colors.white, fontSize: 16, fontWeight: FontWeight.bold),
                                   maxLines: 2,
                                   overflow: TextOverflow.ellipsis,
                                 ),
                                 if (_epg!.nextPlaying != null)
                                   Padding(
                                     padding: const EdgeInsets.only(top: 4),
                                     child: Text(
                                       "A suivre: ${_epg!.nextPlaying}",
                                       style: const TextStyle(color: Colors.white70, fontSize: 14),
                                       maxLines: 1,
                                       overflow: TextOverflow.ellipsis,
                                     ),
                                   ),
                               ],
                             ),
                           ),
                           // LIVE Badge
                           Container(
                              padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
                              margin: const EdgeInsets.only(left: 8),
                              decoration: BoxDecoration(
                                color: Colors.red,
                                borderRadius: BorderRadius.circular(4),
                              ),
                              child: const Text('LIVE', style: TextStyle(color: Colors.white, fontWeight: FontWeight.bold, fontSize: 12)),
                            ),
                         ],
                        ),
                  ),
              ),

        // Progress Bar (Bottom) - Only for VOD
        if (widget.streamType != StreamType.live)
          Positioned(
              bottom: 0, left: 0, right: 0,
              child: Container(
                  color: Colors.black54,
                  padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 16),
                  child: Row(
                    children: [
                        Text(_formatDuration(_position), style: const TextStyle(color: Colors.white)),
                        Expanded(
                          child: Slider(
                            value: _position.inSeconds.toDouble().clamp(0, _duration.inSeconds.toDouble()),
                            min: 0,
                            max: _duration.inSeconds.toDouble(),
                            activeColor: AppColors.primary,
                            inactiveColor: Colors.white24,
                            onChanged: (val) {
                               setState(() {
                                 _position = Duration(seconds: val.toInt());
                                 _isSeeking = true;
                               });
                            },
                            onChangeEnd: (val) {
                               _controller?.seekTo(Duration(seconds: val.toInt()));
                               _isSeeking = false;
                               _onUserInteraction();
                            },
                          ), 
                        ),
                        Text(_formatDuration(_duration), style: const TextStyle(color: Colors.white)),
                    ],
                  ),
              ),
          ),
      ],
    );
  }
}