import 'dart:io';

import 'package:file_picker/file_picker.dart';
import 'package:flutter/material.dart';
import 'package:pasteboard/pasteboard.dart';
import 'package:path/path.dart' as p;
import 'package:path_provider/path_provider.dart';

/// Karakter yüz seti yönetimi — hem karakter düzenle dialogu hem LoRA
/// sayfasından çağrılabilir. Sonuç: kullanıcı dosya ekledi mi (true/false).
Future<bool> yuzSetiDialogGoster(
  BuildContext ctx, {
  required String karakterId,
  required String karakterIsmi,
}) async {
  final docs = await getApplicationDocumentsDirectory();
  final klasor = Directory(p.join(
      docs.path, 'FikoYT-VideoStudyo', 'karakterler', '${karakterId}_set'));
  if (!await klasor.exists()) await klasor.create(recursive: true);

  bool degisti = false;

  if (!ctx.mounted) return false;
  await showDialog(
    context: ctx,
    builder: (dctx) => StatefulBuilder(
      builder: (dctx, setS) {
        final mevcut = klasor
            .listSync()
            .whereType<File>()
            .where((f) {
              final ext = p.extension(f.path).toLowerCase();
              return ['.png', '.jpg', '.jpeg', '.webp'].contains(ext);
            })
            .toList();
        return AlertDialog(
          title: Text('$karakterIsmi — Yüz Seti (${mevcut.length})'),
          content: SizedBox(
            width: 600,
            height: 460,
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(
                  '10-20 farklı açıdan yüz fotoğrafı: önden, yandan, farklı '
                  'ışık ve ifadelerde. LoRA eğitiminde bu fotoğraflar '
                  'kullanılacak.',
                  style: Theme.of(dctx).textTheme.labelSmall?.copyWith(
                        color: Theme.of(dctx).colorScheme.outline,
                      ),
                ),
                const SizedBox(height: 8),
                Row(
                  children: [
                    OutlinedButton.icon(
                      icon: const Icon(Icons.folder_open, size: 14),
                      label: const Text('Dosya ekle'),
                      onPressed: () async {
                        final r = await FilePicker.platform.pickFiles(
                          type: FileType.custom,
                          allowMultiple: true,
                          allowedExtensions: const [
                            'png',
                            'jpg',
                            'jpeg',
                            'webp'
                          ],
                        );
                        if (r != null) {
                          for (final f in r.files) {
                            if (f.path == null) continue;
                            final hedef = p.join(klasor.path,
                                '${DateTime.now().millisecondsSinceEpoch}_${f.name}');
                            await File(f.path!).copy(hedef);
                          }
                          degisti = true;
                          setS(() {});
                        }
                      },
                    ),
                    const SizedBox(width: 8),
                    OutlinedButton.icon(
                      icon: const Icon(Icons.content_paste, size: 14),
                      label: const Text('Panodan ekle'),
                      onPressed: () async {
                        final bytes = await Pasteboard.image;
                        if (bytes == null) return;
                        final hedef = p.join(klasor.path,
                            '${DateTime.now().millisecondsSinceEpoch}_pano.png');
                        await File(hedef).writeAsBytes(bytes);
                        degisti = true;
                        setS(() {});
                      },
                    ),
                    const Spacer(),
                    Container(
                      padding: const EdgeInsets.symmetric(
                          horizontal: 8, vertical: 4),
                      decoration: BoxDecoration(
                        color: Colors.green.withValues(alpha: 0.12),
                        borderRadius: BorderRadius.circular(6),
                      ),
                      child: Text(
                        '${klasor.path}',
                        style:
                            Theme.of(dctx).textTheme.labelSmall?.copyWith(
                                  fontFamily: 'monospace',
                                  fontSize: 9,
                                  color: Colors.green.shade800,
                                ),
                      ),
                    ),
                  ],
                ),
                const SizedBox(height: 8),
                Expanded(
                  child: mevcut.isEmpty
                      ? Center(
                          child: Column(
                            mainAxisAlignment: MainAxisAlignment.center,
                            children: [
                              Icon(Icons.add_photo_alternate_outlined,
                                  size: 48,
                                  color: Theme.of(dctx).colorScheme.outline),
                              const SizedBox(height: 8),
                              Text('Henüz fotoğraf yok',
                                  style: Theme.of(dctx)
                                      .textTheme
                                      .titleSmall
                                      ?.copyWith(
                                          color: Theme.of(dctx)
                                              .colorScheme
                                              .outline)),
                            ],
                          ),
                        )
                      : GridView.builder(
                          gridDelegate:
                              const SliverGridDelegateWithFixedCrossAxisCount(
                            crossAxisCount: 5,
                            mainAxisSpacing: 6,
                            crossAxisSpacing: 6,
                          ),
                          itemCount: mevcut.length,
                          itemBuilder: (gctx, i) {
                            final f = mevcut[i];
                            return Stack(
                              children: [
                                ClipRRect(
                                  borderRadius: BorderRadius.circular(4),
                                  child: Image.file(f,
                                      fit: BoxFit.cover,
                                      width: double.infinity,
                                      height: double.infinity),
                                ),
                                Positioned(
                                  top: 2,
                                  right: 2,
                                  child: GestureDetector(
                                    onTap: () async {
                                      await f.delete();
                                      degisti = true;
                                      setS(() {});
                                    },
                                    child: Container(
                                      decoration: const BoxDecoration(
                                        color: Colors.red,
                                        shape: BoxShape.circle,
                                      ),
                                      padding: const EdgeInsets.all(2),
                                      child: const Icon(Icons.close,
                                          size: 12, color: Colors.white),
                                    ),
                                  ),
                                ),
                              ],
                            );
                          },
                        ),
                ),
              ],
            ),
          ),
          actions: [
            TextButton(
              onPressed: () => Navigator.pop(dctx),
              child: const Text('Kapat'),
            ),
          ],
        );
      },
    ),
  );
  return degisti;
}

/// Veri klasörünü hesapla (LoRA sayfası için)
Future<String> yuzSetiKlasoru(String karakterId) async {
  final docs = await getApplicationDocumentsDirectory();
  return p.join(
      docs.path, 'FikoYT-VideoStudyo', 'karakterler', '${karakterId}_set');
}