import 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:pyramid/core/app_state.dart';
import 'package:pyramid/core/theme.dart';
import 'package:pyramid/features/call_signaling/call_signaling_service.dart';
import 'package:pyramid/features/voice_channel/voice_channel_service.dart';
import 'package:pyramid/widgets/screen_share_picker.dart';
import 'package:flutter_webrtc/flutter_webrtc.dart' as rtc;
import 'package:livekit_client/livekit_client.dart';

class MiniCallWidget extends ConsumerStatefulWidget {
  final dynamic call; // CallSignalingService (1:1) oder VoiceChannelService
  const MiniCallWidget({super.key, required this.call});

  @override
  ConsumerState<MiniCallWidget> createState() => _MiniCallWidgetState();
}

class _MiniCallWidgetState extends ConsumerState<MiniCallWidget> {
  int _elapsed = 0;
  Timer? _timer;
  bool _streamCollapsed = false;

  @override
  void initState() {
    super.initState();
    _timer = Timer.periodic(const Duration(seconds: 1), (_) {
      if (mounted) setState(() => _elapsed++);
    });
  }

  @override
  void dispose() {
    _timer?.cancel();
    super.dispose();
  }

  String _fmt(int s) {
    final m = s ~/ 60;
    final sec = s % 60;
    return '${m.toString().padLeft(2, '0')}:${sec.toString().padLeft(2, '0')}';
  }

  @override
  Widget build(BuildContext context) {
    final pt = PyramidTheme.of(context);
    final isVoip = widget.call is CallSignalingService;
    final call = widget.call;

    final String displayName = isVoip 
        ? (call.currentCall?.room.getLocalizedDisplayname() ?? 'Unknown')
        : call.displayName;
    
    final bool isConnecting = isVoip ? false : call.isConnecting;
    final bool isMuted = isVoip ? call.isMicMuted : call.isMuted;
    final bool isCameraOff = isVoip ? call.isCameraMuted : call.isCameraOff;
    final bool isDeafened = isVoip ? call.isDeafened : call.isDeafened;
    final bool isStreaming = isVoip ? call.isScreensharing : call.isScreenSharing;

    // Show stream preview if camera is on or screensharing
    final showPreview = !isCameraOff || isStreaming;
    // Im Querformat auf Mobilgeräten ist die Höhe knapp — Vorschau kompakter.
    final compact = MediaQuery.sizeOf(context).height < 500;
    final previewHeight = _streamCollapsed ? 28.0 : (compact ? 84.0 : 140.0);

    return Container(
      decoration: BoxDecoration(
        color: pt.bg2,
        border: Border(top: BorderSide(color: pt.border)),
      ),
      child: Column(
        mainAxisSize: MainAxisSize.min,
        children: [
          // Stream Mini Preview (Mockup style)
          if (showPreview)
            AnimatedContainer(
              duration: const Duration(milliseconds: 220),
              curve: Curves.easeOutCubic,
              height: previewHeight,
              width: double.infinity,
              decoration: const BoxDecoration(
                color: Colors.black,
                border: Border(bottom: BorderSide(color: Colors.black26)),
              ),
              child: Stack(
                children: [
                  // Stream Content
                  if (!_streamCollapsed)
                    Positioned.fill(
                      child: isVoip
                        ? rtc.RTCVideoView(
                            // When we're screensharing show our local stream,
                            // otherwise show the remote participant's stream
                            isStreaming ? call.localRenderer : call.remoteRenderer,
                            objectFit: rtc.RTCVideoViewObjectFit.RTCVideoViewObjectFitCover,
                          )
                        : _LiveKitPreview(manager: call as VoiceChannelService),
                    ),
                  
                  // Top bar of preview
                  Container(
                    height: 28,
                    padding: const EdgeInsets.symmetric(horizontal: 10),
                    decoration: BoxDecoration(
                      gradient: LinearGradient(
                        begin: Alignment.topCenter,
                        end: Alignment.bottomCenter,
                        colors: [Colors.black.withAlpha(200), Colors.transparent],
                      ),
                    ),
                    child: Row(
                      children: [
                        const _LiveDot(),
                        const SizedBox(width: 6),
                        Expanded(
                          child: Text(
                            isStreaming ? 'STREAMING' : 'CAMERA ON',
                            style: const TextStyle(color: Colors.white, fontSize: 10, fontWeight: FontWeight.w700, letterSpacing: 0.5),
                          ),
                        ),
                        GestureDetector(
                          onTap: () => setState(() => _streamCollapsed = !_streamCollapsed),
                          child: Icon(
                            _streamCollapsed ? Icons.keyboard_arrow_up_rounded : Icons.keyboard_arrow_down_rounded,
                            size: 16,
                            color: Colors.white70,
                          ),
                        ),
                      ],
                    ),
                  ),
                ],
              ),
            ),

          // Connected info row
          GestureDetector(
            onTap: () => ref.read(viewModeProvider.notifier).state = ViewMode.voice,
            child: Container(
              padding: const EdgeInsets.fromLTRB(12, 10, 12, 10),
              decoration: BoxDecoration(
                gradient: LinearGradient(
                  colors: [
                    pt.online.withAlpha(46),
                    Colors.transparent,
                  ],
                  end: Alignment.centerRight,
                ),
                border: Border(bottom: BorderSide(color: pt.border)),
              ),
              child: Row(
                children: [
                  Expanded(
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        Row(
                          children: [
                            const _LiveDot(),
                            const SizedBox(width: 6),
                            Text(
                              isConnecting ? 'CONNECTING...' : 'VOICE CONNECTED',
                              style: TextStyle(
                                color: pt.online,
                                fontSize: 10,
                                fontWeight: FontWeight.w800,
                                letterSpacing: 0.8,
                              ),
                            ),
                          ],
                        ),
                        const SizedBox(height: 2),
                        Text(
                          displayName,
                          style: TextStyle(
                            color: pt.fg,
                            fontSize: 12,
                            fontWeight: FontWeight.w600,
                          ),
                          overflow: TextOverflow.ellipsis,
                        ),
                        Text(
                          _fmt(_elapsed),
                          style: TextStyle(
                            color: pt.fgDim,
                            fontSize: 10,
                            fontFamily: 'monospace',
                          ),
                        ),
                      ],
                    ),
                  ),
                  Row(
                    mainAxisSize: MainAxisSize.min,
                    children: [
                      _ActionIcon(
                        icon: Icons.open_in_new_rounded,
                        pt: pt,
                        onTap: () => ref.read(viewModeProvider.notifier).state = ViewMode.voice,
                      ),
                      _ActionIcon(
                        icon: Icons.call_end_rounded,
                        pt: pt,
                        danger: true,
                        onTap: () {
                          if (isVoip) {
                            call.hangup();
                          } else {
                            call.hangUp();
                          }
                          ref.read(activeVoiceRoomIdProvider.notifier).state = null;
                          ref.read(viewModeProvider.notifier).state = ViewMode.chat;
                        },
                      ),
                    ],
                  ),
                ],
              ),
            ),
          ),
          // Controls
          Padding(
            padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 8),
            child: Row(
              children: [
                _ControlBtn(
                  icon: isMuted ? Icons.mic_off_rounded : Icons.mic_none_rounded,
                  active: !isMuted,
                  danger: isMuted,
                  pt: pt,
                  onTap: () {
                    if (isVoip) {
                      call.toggleMic();
                    } else {
                      call.toggleMute();
                    }
                  },
                ),
                const SizedBox(width: 4),
                _ControlBtn(
                  icon: isDeafened ? Icons.headset_off_rounded : Icons.headphones_rounded,
                  active: !isDeafened,
                  danger: isDeafened,
                  pt: pt,
                  onTap: () => call.toggleDeafen(),
                ),
                const SizedBox(width: 4),
                _ControlBtn(
                  icon: isCameraOff ? Icons.videocam_off_rounded : Icons.videocam_rounded,
                  active: !isCameraOff,
                  pt: pt,
                  onTap: () => call.toggleCamera(),
                ),
                const SizedBox(width: 4),
                _ControlBtn(
                  icon: Icons.screen_share_rounded,
                  active: isStreaming,
                  pt: pt,
                  onTap: () async {
                    if (isVoip) {
                      (call as CallSignalingService).toggleScreenSharing(context);
                    } else {
                      final lk = call as VoiceChannelService;
                      if (lk.isScreenSharing) {
                        await lk.stopScreenShare();
                      } else {
                        final source = await ScreenSharePicker.show(context);
                        if (source != null) {
                          await lk.startScreenShare(source.id);
                        }
                      }
                    }
                  },
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }
}

class _ActionIcon extends StatelessWidget {
  final IconData icon;
  final PyramidTheme pt;
  final VoidCallback onTap;
  final bool danger;

  const _ActionIcon({required this.icon, required this.pt, required this.onTap, this.danger = false});

  @override
  Widget build(BuildContext context) {
    return IconButton(
      icon: Icon(icon, size: 18),
      onPressed: onTap,
      color: danger ? pt.danger : pt.fgDim,
      visualDensity: VisualDensity.compact,
      style: danger ? IconButton.styleFrom(
        hoverColor: pt.danger.withAlpha(30),
      ) : null,
    );
  }
}

class _ControlBtn extends StatefulWidget {
  final IconData icon;
  final bool active;
  final bool danger;
  final PyramidTheme pt;
  final VoidCallback onTap;

  const _ControlBtn({required this.icon, required this.active, required this.pt, required this.onTap, this.danger = false});

  @override
  State<_ControlBtn> createState() => _ControlBtnState();
}

class _ControlBtnState extends State<_ControlBtn> {
  bool _hovered = false;

  @override
  Widget build(BuildContext context) {
    final pt = widget.pt;
    return Expanded(
      child: MouseRegion(
        onEnter: (_) => setState(() => _hovered = true),
        onExit: (_) => setState(() => _hovered = false),
        child: GestureDetector(
          onTap: widget.onTap,
          child: AnimatedContainer(
            duration: pt.durationFast,
            height: 32,
            decoration: BoxDecoration(
              color: widget.active
                  ? (widget.danger ? pt.danger : pt.accent)
                  : (_hovered ? pt.bgHover : pt.bg3),
              borderRadius: BorderRadius.circular(pt.rSm),
            ),
            child: Icon(
              widget.icon,
              size: 16,
              color: widget.active ? (widget.danger ? Colors.white : pt.accentFg) : pt.fg,
            ),
          ),
        ),
      ),
    );
  }
}

class _LiveKitPreview extends StatelessWidget {
  final VoiceChannelService manager;
  const _LiveKitPreview({required this.manager});

  @override
  Widget build(BuildContext context) {
    final room = manager.room;
    if (room == null) return const SizedBox();

    // Find first available video track (screenshare preferred)
    VideoTrack? bestTrack;
    
    // Check remote participants
    for (final p in room.remoteParticipants.values) {
      for (final pub in p.videoTrackPublications) {
        if (pub.source == TrackSource.screenShareVideo) {
          final t = pub.track;
          if (t is VideoTrack) {
            bestTrack = t;
            break;
          }
        }
      }
      if (bestTrack != null) break;
    }

    // Fallback to camera if no screen share
    if (bestTrack == null) {
      for (final p in room.remoteParticipants.values) {
        for (final pub in p.videoTrackPublications) {
          if (pub.source == TrackSource.camera) {
            final t = pub.track;
            if (t is VideoTrack) {
              bestTrack = t;
              break;
            }
          }
        }
        if (bestTrack != null) break;
      }
    }

    // Fallback to local if still nothing
    if (bestTrack == null && room.localParticipant != null) {
      for (final pub in room.localParticipant!.videoTrackPublications) {
        final t = pub.track;
        if (t is VideoTrack) {
          bestTrack = t;
          break;
        }
      }
    }

    if (bestTrack == null) {
      return Container(
        decoration: BoxDecoration(
          gradient: LinearGradient(
            colors: [Colors.indigo.shade900, Colors.blue.shade900],
            begin: Alignment.topLeft,
            end: Alignment.bottomRight,
          ),
        ),
        child: const Center(
          child: Icon(Icons.podcasts_rounded, color: Colors.white24, size: 40),
        ),
      );
    }

    return VideoTrackRenderer(
      bestTrack,
      fit: VideoViewFit.cover,
    );
  }
}

class _LiveDot extends StatefulWidget {
  const _LiveDot();

  @override
  State<_LiveDot> createState() => _LiveDotState();
}

class _LiveDotState extends State<_LiveDot> with SingleTickerProviderStateMixin {
  late AnimationController _ctrl;

  @override
  void initState() {
    super.initState();
    _ctrl = AnimationController(vsync: this, duration: const Duration(seconds: 2))..repeat(reverse: true);
  }

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

  @override
  Widget build(BuildContext context) {
    final pt = PyramidTheme.of(context);
    return AnimatedBuilder(
      animation: _ctrl,
      builder: (context, _) => Container(
        width: 6,
        height: 6,
        decoration: BoxDecoration(
          color: pt.online,
          shape: BoxShape.circle,
          boxShadow: [
            BoxShadow(
              color: pt.online.withAlpha((_ctrl.value * 150).toInt()),
              blurRadius: 4 * _ctrl.value,
              spreadRadius: 2 * _ctrl.value,
            ),
          ],
        ),
      ),
    );
  }
}