import 'package:flutter/material.dart';

import '../api.dart';
import '../main.dart';

class FilesScreen extends StatefulWidget {
  const FilesScreen({super.key, required this.kcId});
  final String kcId;

  @override
  State<FilesScreen> createState() => _FilesScreenState();
}

class _FilesScreenState extends State<FilesScreen> {
  Future<List<FileEntry>>? _future;

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
    _future ??= AppScope.of(context).api.files(widget.kcId);
  }

  static const _visibilityLabels = {
    'ALLE': 'Alle',
    'ALLE_AUSSER_KONFIS': 'Team (ohne Konfis)',
    'NUR_LT': 'Nur Leitungsteam',
  };

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Dateien')),
      body: FutureBuilder<List<FileEntry>>(
        future: _future,
        builder: (context, snap) {
          if (snap.connectionState != ConnectionState.done) {
            return const Center(child: CircularProgressIndicator());
          }
          if (snap.hasError) {
            return Center(
              child: Padding(
                padding: const EdgeInsets.all(24),
                child: Text('${snap.error}', textAlign: TextAlign.center),
              ),
            );
          }
          final files = snap.data!;
          if (files.isEmpty) {
            return const Center(child: Text('Keine Dateien freigegeben.'));
          }
          return ListView.separated(
            itemCount: files.length,
            separatorBuilder: (context, index) => const Divider(height: 1),
            itemBuilder: (context, i) {
              final f = files[i];
              return ListTile(
                leading: const Icon(Icons.insert_drive_file_outlined),
                title: Text(f.filename),
                subtitle: Text(_visibilityLabels[f.visibility] ?? f.visibility),
                trailing: const Icon(Icons.download),
                onTap: () {
                  ScaffoldMessenger.of(context).showSnackBar(
                    SnackBar(
                      content: Text(
                        'Download-URL: ${AppScope.of(context).api.fileDownloadUrl(f.id)}',
                      ),
                    ),
                  );
                },
              );
            },
          );
        },
      ),
    );
  }
}