kz_educa/lib/screens/lesson_list_screen.dart

// lib/widgets/lesson_detail_sheet.dart
import 'package:flutter/material.dart';
import 'package:flutter_downloader/flutter_downloader.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:chewie/chewie.dart';
import 'package:video_player/video_player.dart';

import '../models/app_models.dart';
import '../services/i18n_service.dart';
import '../services/toast_service.dart';

class LessonDetailSheet extends StatefulWidget {
  final QuickLesson lesson;
  final bool isCompleted;
  final Function(QuickLesson) onMarkComplete;

  const LessonDetailSheet({
    super.key,
    required this.lesson,
    required this.isCompleted,
    required this.onMarkComplete,
  });

  @override
  State<LessonDetailSheet> createState() => _LessonDetailSheetState();
}

class _LessonDetailSheetState extends State<LessonDetailSheet> {
  late VideoPlayerController _videoPlayerController;
  ChewieController? _chewieController;
  bool _isLoading = true;

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

  Future<void> _initializePlayer() async {
    _videoPlayerController =
        VideoPlayerController.network(widget.lesson.videoUrl!);
    await _videoPlayerController.initialize();
    _chewieController = ChewieController(
      videoPlayerController: _videoPlayerController,
      autoPlay: true,
      looping: true,
    );
    setState(() {
      _isLoading = false;
    });
  }

  @override
  void dispose() {
    _videoPlayerController.dispose();
    _chewieController?.dispose();
    super.dispose();
  }

  Future<void> _downloadVideo(String url, String fileName) async {
    final status = await Permission.storage.request();
    if (status.isGranted) {
      final taskId = await FlutterDownloader.enqueue(
        url: url,
        savedDir: '/storage/emulated/0/Download',
        fileName: fileName,
        showNotification: true,
        openFileFromNotification: true,
      );
      // Chamada corrigida
      ToastService.show(message: 'Download iniciado');
    } else {
      // Chamada corrigida, com um tipo de erro
      ToastService.show(
        message: 'Permissão de armazenamento negada',
        type: ToastType.error,
      );
    }
  }

  @override
  Widget build(BuildContext context) {
    final i18n = I18nService();

    return Container(
      decoration: const BoxDecoration(
        color: Color.fromARGB(255, 14, 14, 96),
        borderRadius: BorderRadius.vertical(top: Radius.circular(30)),
        boxShadow: [
          BoxShadow(
            color: Color.fromARGB(50, 0, 0, 0),
            blurRadius: 20,
            offset: Offset(0, -5),
          ),
        ],
      ),
      child: Stack(
        children: [
          SingleChildScrollView(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                _buildVideoPlayer(),
                Padding(
                  padding: const EdgeInsets.all(24.0),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Text(
                        widget.lesson.titulo,
                        style: TextStyle(
                          fontSize: 28,
                          fontWeight: FontWeight.bold,
                          color: Colors.deepPurple.shade900,
                        ),
                      ),
                      const SizedBox(height: 12),
                      Text(
                        widget.lesson.conteudo!,
                        style: TextStyle(
                          fontSize: 16,
                          color: Colors.grey.shade700,
                        ),
                      ),
                      const SizedBox(height: 24),
                      Row(
                        mainAxisAlignment: MainAxisAlignment.spaceBetween,
                        children: [
                          _buildDurationWidget(i18n),
                          _buildMarkCompleteButton(i18n),
                        ],
                      ),
                      const SizedBox(height: 24),
                      _buildDownloadButton(i18n),
                    ],
                  ),
                ),
              ],
            ),
          ),
          Positioned(
            top: 10,
            right: 10,
            child: IconButton(
              onPressed: () => Navigator.pop(context),
              icon: Icon(Icons.close, color: Colors.grey.shade600, size: 28),
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildVideoPlayer() {
    return Container(
      height: 250,
      decoration: BoxDecoration(
        borderRadius: const BorderRadius.vertical(top: Radius.circular(30)),
        color: Colors.black,
      ),
      child: _isLoading
          ? const Center(child: CircularProgressIndicator(color: Color.fromARGB(255, 17, 6, 42)))
          : ClipRRect(
              borderRadius:
                  const BorderRadius.vertical(top: Radius.circular(30)),
              child: Chewie(controller: _chewieController!),
            ),
    );
  }

  Widget _buildDurationWidget(I18nService i18n) {
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
      decoration: BoxDecoration(
        color: Colors.deepPurple.withOpacity(0.1),
        borderRadius: BorderRadius.circular(20),
      ),
      child: Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          const Icon(Icons.access_time_rounded,
              size: 20, color: Colors.deepPurple),
          const SizedBox(width: 8),
          Text(
            '${i18n.t('lesson_duration')}: ${widget.lesson.duracao}',
            style: TextStyle(
              fontSize: 14,
              color: Colors.deepPurple,
              fontWeight: FontWeight.w600,
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildMarkCompleteButton(I18nService i18n) {
    return ElevatedButton.icon(
      onPressed: widget.isCompleted
          ? null
          : () {
              widget.onMarkComplete(widget.lesson);
              Navigator.pop(context);
              ToastService.show(message: 'Lição concluída!');
            },
      icon: widget.isCompleted
          ? const Icon(Icons.check_circle_rounded, color: Colors.white)
          : const Icon(Icons.check_circle_outline_rounded, color: Colors.white),
      label: Text(
        widget.isCompleted ? i18n.t('completed') : i18n.t('mark_as_completed'),
        style: const TextStyle(fontWeight: FontWeight.bold),
      ),
      style: ElevatedButton.styleFrom(
        foregroundColor: Colors.white,
        backgroundColor: widget.isCompleted
            ? Colors.green.shade700
            : Colors.deepPurple.shade600,
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(25),
        ),
        padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 12),
        elevation: 5,
      ),
    );
  }

  Widget _buildDownloadButton(I18nService i18n) {
    return InkWell(
      onTap: () {
        if (widget.lesson.videoUrl != null) {
          _downloadVideo(widget.lesson.videoUrl!, widget.lesson.titulo!);
        } else {
          // Opcional: mostrar um toast se a URL for nula
          ToastService.show(
              message: 'URL do vídeo não disponível.', type: ToastType.error);
        }
      },
      child: Container(
        height: 60,
        width: double.infinity,
        decoration: BoxDecoration(
          borderRadius: BorderRadius.circular(30),
          gradient: const LinearGradient(
            colors: [Color(0xFFE94560), Color(0xFFF07E3F)],
            begin: Alignment.centerLeft,
            end: Alignment.centerRight,
          ),
          boxShadow: [
            BoxShadow(
              color: const Color(0xFFE94560).withOpacity(0.4),
              blurRadius: 10,
              offset: const Offset(0, 5),
            ),
          ],
        ),
        child: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            const Icon(Icons.cloud_download_rounded,
                color: Colors.white, size: 28),
            const SizedBox(width: 10),
            Text(
              i18n.t('download_video'),
              style: const TextStyle(
                color: Colors.white,
                fontSize: 18,
                fontWeight: FontWeight.bold,
              ),
            ),
          ],
        ),
      ),
    );
  }
}