import 'package:flutter/material.dart';
import 'package:video_player/video_player.dart'; // 비디오 패키지 임포트

class ChatbotDetailPage extends StatefulWidget {
  final VoidCallback onBack;

  const ChatbotDetailPage({super.key, required this.onBack});

  @override
  State<ChatbotDetailPage> createState() => _ChatbotDetailPageState();
}

class _ChatbotDetailPageState extends State<ChatbotDetailPage> {
  late VideoPlayerController _knowVideoController;
  bool _isVideoInitialized = false;
  bool _hasVideoError = false;

  @override
  void initState() {
    super.initState();
    _initializeKnowVideo();
  }

  void _initializeKnowVideo() {
    const String videoAssetPath = 'assets/assets/videos/know.mp4';
    _knowVideoController = VideoPlayerController.asset(videoAssetPath);

    _knowVideoController.initialize().then((_) {
      if (!mounted) return;
      setState(() {
        _isVideoInitialized = true;
      });
      _knowVideoController.setLooping(true);
      _knowVideoController.setVolume(0.0);
      _knowVideoController.play();
    }).catchError((error) {
      debugPrint("1차 지식 영상 로딩 실패, 백업 경로 시도 중...: $error");

      _knowVideoController = VideoPlayerController.asset('assets/videos/know.mp4');
      _knowVideoController.initialize().then((_) {
        if (!mounted) return;
        setState(() {
          _isVideoInitialized = true;
        });
        _knowVideoController.setLooping(true);
        _knowVideoController.setVolume(0.0);
        _knowVideoController.play();
      }).catchError((retryError) {
        if (!mounted) return;
        setState(() {
          _hasVideoError = true;
        });
        debugPrint("최종 지식 비디오 초기화 에러: $retryError");
      });
    });
  }

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

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        // 상단 미니 센서 바
        SizedBox(
          height: 100,
          child: Row(
            children: [
              _buildMiniSensor('온도', '24.5°C', Colors.orangeAccent),
              const SizedBox(width: 10),
              _buildMiniSensor('습도', '65%', Colors.blueAccent),
              const SizedBox(width: 10),
              _buildMiniSensor('CO2', '420 ppm', Colors.greenAccent),
              const SizedBox(width: 10),
              _buildMiniSensor('TVOC', '0.15 mg/m³', Colors.tealAccent),
              const SizedBox(width: 10),
              _buildMiniSensor('미세먼지', '15', Colors.white70),
            ],
          ),
        ),
        const SizedBox(height: 20),

        // 메인 콘텐츠 영역
        Expanded(
          child: Row(
            children: [
              // 🤖 [좌측] 푸미 캐릭터 전용 패널 (✨ flex: 60 으로 수정)
              Expanded(
                flex: 60,
                child: Container(
                  decoration: BoxDecoration(
                    color: const Color(0xFF1A1D23),
                    borderRadius: BorderRadius.circular(24),
                    border: Border.all(color: Colors.white.withOpacity(0.05)),
                  ),
                  child: Stack(
                    children: [
                      // 🔙 "목록으로 돌아가기" 버튼
                      Positioned(
                        top: 20,
                        left: 20,
                        child: MouseRegion(
                          cursor: SystemMouseCursors.click,
                          child: GestureDetector(
                            onTap: widget.onBack,
                            child: Container(
                              padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 10),
                              decoration: BoxDecoration(
                                color: Colors.white.withOpacity(0.05),
                                borderRadius: BorderRadius.circular(12),
                                border: Border.all(color: const Color(0xFFB4E49C).withOpacity(0.4)),
                              ),
                              child: const Row(
                                mainAxisSize: MainAxisSize.min,
                                children: [
                                  Icon(Icons.arrow_back_ios_new, color: Color(0xFFB4E49C), size: 14),
                                  SizedBox(width: 8),
                                  Text(
                                    '목록으로 돌아가기',
                                    style: TextStyle(
                                      color: Colors.white,
                                      fontSize: 14,
                                      fontWeight: FontWeight.bold,
                                      letterSpacing: -0.5,
                                    ),
                                  ),
                                ],
                              ),
                            ),
                          ),
                        ),
                      ),

                      // 정중앙 know.mp4 대형 배치
                      Center(
                        child: _hasVideoError
                            ? Icon(Icons.smart_toy, size: 160, color: const Color(0xFFB4E49C).withOpacity(0.3))
                            : _isVideoInitialized
                            ? SizedBox(
                          width: 600, // ✨ 메인 화면과 짝을 맞춰 550 스케일로 정돈 극대화!
                          child: AspectRatio(
                            aspectRatio: _knowVideoController.value.aspectRatio,
                            child: ClipRRect(
                              borderRadius: BorderRadius.circular(20),
                              child: VideoPlayer(_knowVideoController),
                            ),
                          ),
                        )
                            : const SizedBox(
                          width: 100,
                          height: 100,
                          child: Center(child: CircularProgressIndicator(color: Color(0xFFB4E49C))),
                        ),
                      ),
                    ],
                  ),
                ),
              ),
              const SizedBox(width: 20),

              // 💬 [우측] 채팅창 (✨ flex: 40 으로 수정)
              Expanded(
                flex: 40,
                child: Container(
                  decoration: BoxDecoration(
                    color: const Color(0xFF1A1D23),
                    borderRadius: BorderRadius.circular(24),
                  ),
                  child: Column(
                    children: [
                      const Padding(
                        padding: EdgeInsets.all(20),
                        child: Row(
                          children: [
                            CircleAvatar(backgroundColor: Color(0xFFB4E49C), radius: 4),
                            SizedBox(width: 10),
                            Text('푸미 일지', style: TextStyle(color: Colors.white, fontWeight: FontWeight.bold)),
                          ],
                        ),
                      ),
                      Expanded(
                        child: ListView(
                          padding: const EdgeInsets.symmetric(horizontal: 16),
                          children: [
                            _buildChatBubble("상태 분석이 완료되었습니다. 무엇을 도와드릴까요?", true),
                            _buildChatBubble("현재 습도가 적당하니?", false),
                            _buildChatBubble("네, 습도 65%로 최적의 상태입니다.", true),
                          ],
                        ),
                      ),
                      // 하단 입력창
                      Padding(
                        padding: const EdgeInsets.all(16),
                        child: TextField(
                          decoration: InputDecoration(
                            hintText: 'Ask AI...',
                            hintStyle: const TextStyle(color: Colors.white24, fontSize: 14),
                            filled: true,
                            fillColor: Colors.white.withOpacity(0.05),
                            border: OutlineInputBorder(borderRadius: BorderRadius.circular(15), borderSide: BorderSide.none),
                            suffixIcon: const Icon(Icons.send, color: Color(0xFFB4E49C), size: 20),
                          ),
                        ),
                      ),
                    ],
                  ),
                ),
              ),
            ],
          ),
        ),
      ],
    );
  }

  // 채팅 말풍선 헬퍼
  Widget _buildChatBubble(String msg, bool isBot) {
    return Align(
      alignment: isBot ? Alignment.centerLeft : Alignment.centerRight,
      child: Container(
        margin: const EdgeInsets.symmetric(vertical: 5),
        padding: const EdgeInsets.all(12),
        decoration: BoxDecoration(
          color: isBot ? Colors.white.withOpacity(0.08) : const Color(0xFFB4E49C).withOpacity(0.2),
          borderRadius: BorderRadius.circular(15),
        ),
        child: Text(msg, style: const TextStyle(color: Colors.white, fontSize: 13)),
      ),
    );
  }

  // 미니 센서 카드 헬퍼
  Widget _buildMiniSensor(String t, String v, Color c) {
    return Expanded(
      child: Container(
        padding: const EdgeInsets.all(12),
        decoration: BoxDecoration(color: const Color(0xFF1A1D23), borderRadius: BorderRadius.circular(15)),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Text(t, style: const TextStyle(color: Colors.white54, fontSize: 11)),
            Text(v, style: TextStyle(color: c, fontSize: 16, fontWeight: FontWeight.bold)),
          ],
        ),
      ),
    );
  }
}