import 'dart:io';

import 'package:file_picker/file_picker.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';

import '../app/tema.dart';
import '../comfy/comfy_istemci.dart';
import '../comfy/workflow/lora_egitim_workflow.dart';
import '../veri/isar_servisi.dart';
import '../veri/modeller/karakter.dart';
import 'karakter_form_state.dart';
import 'karakter_servisi.dart';

const _cinsiyetler = ['kadın', 'erkek', 'genç kız', 'genç erkek', 'androjen'];
const _yaslar = ['çocuk', 'genç (18-25)', 'yetişkin (25-40)', 'orta yaş', 'yaşlı'];
const _vucutlar = ['ince', 'atletik', 'kaslı', 'dolgun', 'balık etli', 'zayıf'];
const _stiller = [
  'photorealistic', 'cinematic', 'anime', 'oil painting',
  '3d render', 'comic', 'fantasy art', 'cyberpunk',
];

/// Üst bardaki isimli karakter kütüphanesi şeridi.
class KarakterKutuphanesi extends ConsumerWidget {
  const KarakterKutuphanesi({super.key});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final karakterler = ref.watch(karakterlerProvider).valueOrNull ?? [];
    return Card(
      child: Padding(
        padding: const EdgeInsets.fromLTRB(10, 6, 10, 6),
        child: Row(children: [
          const Icon(Icons.groups, size: 16, color: FikoRenkler.neonYesil),
          const SizedBox(width: 6),
          const Text('Karakter Kütüphanesi',
              style: TextStyle(fontSize: 12, fontWeight: FontWeight.w700)),
          const SizedBox(width: 10),
          OutlinedButton.icon(
            style: OutlinedButton.styleFrom(visualDensity: VisualDensity.compact),
            icon: const Icon(Icons.person_add, size: 15),
            label: const Text('Yeni', style: TextStyle(fontSize: 11.5)),
            onPressed: () => _duzenle(context, ref, Karakter()),
          ),
          const SizedBox(width: 10),
          Expanded(
            child: SizedBox(
              height: 58,
              child: karakterler.isEmpty
                  ? Align(
                      alignment: Alignment.centerLeft,
                      child: Text('Henüz karakter yok — "Yeni" ile oluştur',
                          style: TextStyle(fontSize: 11,
                              color: Theme.of(context).colorScheme.onSurface
                                  .withValues(alpha: 0.45))))
                  : ListView.separated(
                      scrollDirection: Axis.horizontal,
                      itemCount: karakterler.length,
                      separatorBuilder: (_, _) => const SizedBox(width: 8),
                      itemBuilder: (_, i) =>
                          _KarakterKart(karakter: karakterler[i]),
                    ),
            ),
          ),
        ]),
      ),
    );
  }
}

class _KarakterKart extends ConsumerWidget {
  const _KarakterKart({required this.karakter});
  final Karakter karakter;

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final url = ref.read(_comfyUrlKK);
    final egitim = ref.watch(loraEgitimDurumProvider)[karakter.id];
    return GestureDetector(
      onTap: () => ref.read(karakterFormProvider.notifier).karakteriUygula(karakter),
      child: Container(
        width: 168,
        padding: const EdgeInsets.all(5),
        decoration: BoxDecoration(
          color: Theme.of(context).colorScheme.surface,
          borderRadius: BorderRadius.circular(8),
          border: Border.all(color: karakter.loraAdi.isNotEmpty
              ? FikoRenkler.neonMor.withValues(alpha: 0.5)
              : Theme.of(context).dividerColor),
        ),
        child: Row(children: [
          Container(
            width: 46, height: 46,
            decoration: BoxDecoration(
              color: Colors.black26, borderRadius: BorderRadius.circular(6)),
            clipBehavior: Clip.antiAlias,
            child: karakter.anaRef.isNotEmpty
                ? Image.network('$url/view?filename=${Uri.encodeComponent(karakter.anaRef)}&type=input',
                    fit: BoxFit.cover, errorBuilder: (_, _, _) => const Icon(Icons.face, size: 24))
                : const Icon(Icons.face, size: 24),
          ),
          const SizedBox(width: 6),
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                Text(karakter.ad.isEmpty ? 'isimsiz' : karakter.ad,
                    maxLines: 1, overflow: TextOverflow.ellipsis,
                    style: const TextStyle(fontSize: 11.5, fontWeight: FontWeight.w700)),
                Text([
                  karakter.cinsiyet,
                  karakter.yas,
                  if (karakter.kiyafetler.isNotEmpty)
                    '👗${karakter.kiyafetler.length}',
                ].where((s) => s.isNotEmpty).join(' • '),
                    maxLines: 1, overflow: TextOverflow.ellipsis,
                    style: TextStyle(fontSize: 9,
                        color: Theme.of(context).colorScheme.onSurface.withValues(alpha: 0.5))),
                if (egitim != null)
                  Text(egitim, maxLines: 1, overflow: TextOverflow.ellipsis,
                      style: const TextStyle(fontSize: 8.5, color: FikoRenkler.neonAmber))
                else if (karakter.loraAdi.isNotEmpty)
                  const Text('✓ LoRA eğitildi',
                      style: TextStyle(fontSize: 8.5, color: FikoRenkler.neonMor)),
              ],
            ),
          ),
          Column(children: [
            InkWell(
              onTap: () => _KarakterKutuphanesiAksiyon.duzenle(context, ref, karakter),
              child: const Padding(padding: EdgeInsets.all(2), child: Icon(Icons.edit, size: 14)),
            ),
            Tooltip(
              message: 'AI ile referans portreler üret (4 açı)',
              child: InkWell(
                onTap: () => KarakterServisi.aiOlustur(ref, karakter),
                child: const Padding(padding: EdgeInsets.all(2),
                    child: Icon(Icons.auto_fix_high, size: 14,
                        color: FikoRenkler.neonAmber)),
              ),
            ),
            Tooltip(
              message: 'LoRA eğit',
              child: InkWell(
                onTap: () => _KarakterKutuphanesiAksiyon.egitMenu(context, ref, karakter),
                child: const Padding(padding: EdgeInsets.all(2),
                    child: Icon(Icons.model_training, size: 15, color: FikoRenkler.neonMor)),
              ),
            ),
          ]),
        ]),
      ),
    );
  }
}

final _comfyUrlKK = Provider<String>((ref) => ref.watch(ayarlarProvider).comfyUrl);

void _duzenle(BuildContext context, WidgetRef ref, Karakter k) =>
    _KarakterKutuphanesiAksiyon.duzenle(context, ref, k);

abstract final class _KarakterKutuphanesiAksiyon {
  static void egitMenu(BuildContext context, WidgetRef ref, Karakter k) {
    final refSayi = (k.anaRef.isNotEmpty ? 1 : 0) + k.refGorseller.length;
    showDialog<void>(context: context, builder: (ctx) => AlertDialog(
      title: Text('${k.ad} — LoRA Eğit'),
      content: Column(mainAxisSize: MainAxisSize.min, crossAxisAlignment: CrossAxisAlignment.start, children: [
        Text('$refSayi referans görsel ile LoRA eğitilecek.',
            style: const TextStyle(fontSize: 12)),
        if (refSayi < 3) const Padding(padding: EdgeInsets.only(top: 6),
            child: Text('⚠ En az 3-5 referans önerilir (Düzenle → referans ekle)',
                style: TextStyle(fontSize: 10.5, color: FikoRenkler.neonAmber))),
        const SizedBox(height: 10),
        for (final preset in loraEgitimPresetleri)
          ListTile(
            dense: true, contentPadding: EdgeInsets.zero,
            title: Text(preset.etiket, style: const TextStyle(fontSize: 12.5)),
            subtitle: Text('rank ${preset.rank} • ${preset.steps} adım',
                style: const TextStyle(fontSize: 10)),
            onTap: () {
              Navigator.pop(ctx);
              KarakterServisi.loraEgit(ref, k, preset);
            },
          ),
      ]),
      actions: [TextButton(onPressed: () => Navigator.pop(ctx), child: const Text('Vazgeç'))],
    ));
  }

  static void duzenle(BuildContext context, WidgetRef ref, Karakter k) {
    final ad = TextEditingController(text: k.ad);
    final sac = TextEditingController(text: k.sacRengi);
    final goz = TextEditingController(text: k.gozRengi);
    final tetik = TextEditingController(text: k.tetik);
    final aciklama = TextEditingController(text: k.aciklama);
    var cinsiyet = k.cinsiyet, yas = k.yas, vucut = k.vucut, stil = k.stil;
    var yontem = k.identityYontem;
    final refler = <String>[
      if (k.anaRef.isNotEmpty) k.anaRef,
      ...k.refGorseller,
    ];
    final kiyafetler = <String>[...k.kiyafetler];
    final url = ref.read(_comfyUrlKK);

    showDialog<void>(context: context, builder: (ctx) => StatefulBuilder(
      builder: (ctx, setSt) => AlertDialog(
        title: Text(k.id == Isar_autoIncrement ? 'Yeni Karakter' : 'Karakter Düzenle'),
        content: SizedBox(width: 440, child: SingleChildScrollView(
          child: Column(mainAxisSize: MainAxisSize.min, children: [
            TextField(controller: ad, decoration: const InputDecoration(labelText: 'İsim *')),
            const SizedBox(height: 8),
            Row(children: [
              Expanded(child: _drop('Cinsiyet', _cinsiyetler, cinsiyet, (v) => setSt(() => cinsiyet = v))),
              const SizedBox(width: 8),
              Expanded(child: _drop('Yaş', _yaslar, yas, (v) => setSt(() => yas = v))),
            ]),
            const SizedBox(height: 8),
            Row(children: [
              Expanded(child: TextField(controller: sac, decoration: const InputDecoration(labelText: 'Saç rengi'))),
              const SizedBox(width: 8),
              Expanded(child: TextField(controller: goz, decoration: const InputDecoration(labelText: 'Göz rengi'))),
            ]),
            const SizedBox(height: 8),
            Row(children: [
              Expanded(child: _drop('Vücut', _vucutlar, vucut, (v) => setSt(() => vucut = v))),
              const SizedBox(width: 8),
              Expanded(child: _drop('Stil', _stiller, stil, (v) => setSt(() => stil = v))),
            ]),
            const SizedBox(height: 8),
            TextField(controller: aciklama, maxLines: 2,
                decoration: const InputDecoration(labelText: 'Serbest betimleme (İngilizce)')),
            const SizedBox(height: 8),
            TextField(controller: tetik, decoration: const InputDecoration(
                labelText: 'Tetik kelime (LoRA için)', hintText: 'örn: aysel_woman')),
            const SizedBox(height: 8),
            DropdownButtonFormField<IdentityYontem>(
              initialValue: yontem,
              decoration: const InputDecoration(labelText: 'Kimlik yöntemi'),
              items: const [
                DropdownMenuItem(value: IdentityYontem.pulid, child: Text('PuLID (yüz)')),
                DropdownMenuItem(value: IdentityYontem.instantid, child: Text('InstantID')),
                DropdownMenuItem(value: IdentityYontem.ipadapter, child: Text('IPAdapter')),
                DropdownMenuItem(value: IdentityYontem.lora, child: Text('LoRA (eğitilmiş)')),
                DropdownMenuItem(value: IdentityYontem.reactor, child: Text('Reactor (yüz değiştir)')),
              ],
              onChanged: (v) => setSt(() => yontem = v ?? yontem),
            ),
            const SizedBox(height: 10),
            Align(alignment: Alignment.centerLeft, child: Row(children: [
              const Text('Referans görseller (yüz + LoRA eğitimi)',
                  style: TextStyle(fontSize: 11, fontWeight: FontWeight.w700)),
              const Spacer(),
              Text('${refler.length}',
                  style: const TextStyle(fontSize: 11, color: FikoRenkler.neonYesil)),
            ])),
            const SizedBox(height: 4),
            Wrap(spacing: 6, runSpacing: 6, children: [
              for (var i = 0; i < refler.length; i++)
                Stack(children: [
                  Container(width: 56, height: 56,
                    decoration: BoxDecoration(borderRadius: BorderRadius.circular(6),
                      border: Border.all(color: i == 0
                          ? FikoRenkler.neonYesil : Theme.of(ctx).dividerColor)),
                    clipBehavior: Clip.antiAlias,
                    child: Image.network('$url/view?filename=${Uri.encodeComponent(refler[i])}&type=input',
                        fit: BoxFit.cover, errorBuilder: (_, _, _) => const Icon(Icons.image, size: 20))),
                  Positioned(top: 0, right: 0, child: GestureDetector(
                    onTap: () => setSt(() => refler.removeAt(i)),
                    child: Container(color: Colors.black54,
                        child: const Icon(Icons.close, size: 13, color: Colors.white)))),
                  if (i == 0) const Positioned(bottom: 0, left: 0, child: Padding(
                      padding: EdgeInsets.all(1),
                      child: Text('ana', style: TextStyle(fontSize: 7, color: FikoRenkler.neonYesil)))),
                ]),
              GestureDetector(
                onTap: () async {
                  final s = await FilePicker.platform.pickFiles(
                      type: FileType.image, allowMultiple: true, dialogTitle: 'Referans görsel(ler)');
                  if (s == null) return;
                  for (final f in s.files) {
                    if (f.path != null && File(f.path!).existsSync()) {
                      final ad = await ref.read(comfyIstemciProvider).resimYukle(f.path!);
                      refler.add(ad);
                    }
                  }
                  setSt(() {});
                },
                child: Container(width: 56, height: 56,
                  decoration: BoxDecoration(borderRadius: BorderRadius.circular(6),
                    border: Border.all(color: Theme.of(ctx).dividerColor)),
                  child: const Icon(Icons.add_a_photo, size: 20)),
              ),
            ]),
            const SizedBox(height: 10),
            Align(alignment: Alignment.centerLeft, child: Row(children: [
              const Text('👗 Kıyafetler (IPAdapter referansı)',
                  style: TextStyle(fontSize: 11, fontWeight: FontWeight.w700)),
              const Spacer(),
              Text('${kiyafetler.length}',
                  style: const TextStyle(fontSize: 11, color: FikoRenkler.neonPembe)),
            ])),
            const SizedBox(height: 4),
            Wrap(spacing: 6, runSpacing: 6, children: [
              for (var i = 0; i < kiyafetler.length; i++)
                Stack(children: [
                  Container(width: 56, height: 56,
                    decoration: BoxDecoration(borderRadius: BorderRadius.circular(6),
                      border: Border.all(
                          color: FikoRenkler.neonPembe.withValues(alpha: 0.5))),
                    clipBehavior: Clip.antiAlias,
                    child: Image.network(
                        '$url/view?filename=${Uri.encodeComponent(kiyafetler[i])}&type=input',
                        fit: BoxFit.cover,
                        errorBuilder: (_, _, _) =>
                            const Icon(Icons.checkroom, size: 20))),
                  Positioned(top: 0, right: 0, child: GestureDetector(
                    onTap: () => setSt(() => kiyafetler.removeAt(i)),
                    child: Container(color: Colors.black54,
                        child: const Icon(Icons.close, size: 13, color: Colors.white)))),
                ]),
              GestureDetector(
                onTap: () async {
                  final s = await FilePicker.platform.pickFiles(
                      type: FileType.image, allowMultiple: true,
                      dialogTitle: 'Kıyafet görsel(ler)i');
                  if (s == null) return;
                  for (final f in s.files) {
                    if (f.path != null && File(f.path!).existsSync()) {
                      final ad = await ref.read(comfyIstemciProvider).resimYukle(f.path!);
                      kiyafetler.add(ad);
                    }
                  }
                  setSt(() {});
                },
                child: Container(width: 56, height: 56,
                  decoration: BoxDecoration(borderRadius: BorderRadius.circular(6),
                    border: Border.all(color: Theme.of(ctx).dividerColor)),
                  child: const Icon(Icons.checkroom, size: 20)),
              ),
            ]),
          ]),
        )),
        actions: [
          if (k.id != Isar_autoIncrement)
            TextButton(
              onPressed: () { KarakterServisi.sil(k.id); Navigator.pop(ctx); },
              child: const Text('Sil', style: TextStyle(color: Colors.redAccent))),
          TextButton(onPressed: () => Navigator.pop(ctx), child: const Text('Vazgeç')),
          FilledButton(onPressed: () {
            if (ad.text.trim().isEmpty) return;
            k
              ..ad = ad.text.trim()
              ..cinsiyet = cinsiyet ..yas = yas
              ..sacRengi = sac.text.trim() ..gozRengi = goz.text.trim()
              ..vucut = vucut ..stil = stil
              ..aciklama = aciklama.text.trim() ..tetik = tetik.text.trim()
              ..identityYontem = yontem
              ..anaRef = refler.isNotEmpty ? refler.first : ''
              ..refGorseller = refler.length > 1 ? refler.sublist(1) : []
              ..kiyafetler = kiyafetler;
            KarakterServisi.kaydet(k);
            Navigator.pop(ctx);
          }, child: const Text('Kaydet')),
        ],
      ),
    ));
  }

  static Widget _drop(String etiket, List<String> opts, String secili,
      void Function(String) onChange) {
    final deger = opts.contains(secili) ? secili : null;
    return DropdownButtonFormField<String>(
      initialValue: deger,
      isExpanded: true,
      decoration: InputDecoration(labelText: etiket, isDense: true),
      items: [for (final o in opts)
        DropdownMenuItem(value: o, child: Text(o, style: const TextStyle(fontSize: 12)))],
      onChanged: (v) { if (v != null) onChange(v); },
    );
  }
}

// Isar.autoIncrement sabiti (yeni kayıt tespiti)
// ignore: constant_identifier_names
const Isar_autoIncrement = -9223372036854775808;