import 'package:fikoyt_akcali_v1/apps/finans/core/models/finans.model.dart';
import 'package:fikoyt_akcali_v1/apps/finans/core/services/barkod_servisi.dart';
import 'package:fikoyt_akcali_v1/apps/finans/core/services/finans.servis.dart';
import 'package:fikoyt_akcali_v1/apps/finans/core/tema/akcali_tema.dart';
import 'package:fikoyt_ui/fikoyt_ui.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:mobile_scanner/mobile_scanner.dart';

class BarkodOkuyucuSayfasi extends StatefulWidget {
  const BarkodOkuyucuSayfasi({super.key});

  @override
  State<BarkodOkuyucuSayfasi> createState() => _BarkodOkuyucuSayfasiState();
}

class _BarkodOkuyucuSayfasiState extends State<BarkodOkuyucuSayfasi>
    with SingleTickerProviderStateMixin {
  late TabController _tabController;
  final _barkodController = TextEditingController();
  final _barkodFocus = FocusNode();

  BarkodServisi? _barkodServisi;
  FinansServis? _finansServis;

  final RxBool _taraniyor = false.obs;
  final Rx<Urun?> _bulunanUrun = Rx<Urun?>(null);
  final RxBool _urunBulundu = false.obs;
  final _sonBarkod = ''.obs;

  // Market Modu
  final RxList<_MarketKalemi> _marketListesi = <_MarketKalemi>[].obs;
  final RxDouble _tahminiToplam = 0.0.obs;
  final RxDouble _gercekToplam = 0.0.obs;
  final _aktifListeAdi = 'Alisveris'.obs;

  @override
  void initState() {
    super.initState();
    _tabController = TabController(length: 2, vsync: this);
    _servisleriBaslat();
  }

  void _servisleriBaslat() {
    try {
      _barkodServisi = Get.find<BarkodServisi>();
    } catch (_) {
      _barkodServisi = Get.put(BarkodServisi());
    }
    _finansServis = FikoYTCoreService.servisler.getServis<FinansServis>();
  }

  @override
  void dispose() {
    _tabController.dispose();
    _barkodController.dispose();
    _barkodFocus.dispose();
    super.dispose();
  }

  Future<void> _barkodTara() async {
    final barkod = _barkodController.text.trim();
    if (barkod.isEmpty) {
      Get.snackbar('Uyari', 'Barkod numarasi girin veya kamera ile tarayin',
          backgroundColor: AkcaliTema.uyari.withAlpha(30),
          colorText: AkcaliTema.uyari);
      return;
    }

    _taraniyor.value = true;
    _sonBarkod.value = barkod;

    try {
      final urun = await _barkodServisi?.barkodIleUrunBul(barkod);
      _bulunanUrun.value = urun;
      _urunBulundu.value = urun != null;

      if (urun == null) {
        _yeniUrunDialoguGoster(barkod);
      }
    } catch (e) {
      _urunBulundu.value = false;
      _bulunanUrun.value = null;
    } finally {
      _taraniyor.value = false;
    }
  }

  Future<void> _kameraIleTara({bool marketModu = false}) async {
    final sonuc = await Navigator.of(context).push<String>(
      MaterialPageRoute(
        builder: (_) => _KameraTarayici(),
      ),
    );
    if (sonuc != null && sonuc.isNotEmpty && mounted) {
      _barkodController.text = sonuc;
      if (marketModu) {
        _barkodTaraMarket();
      } else {
        _barkodTara();
      }
    }
  }

  Future<void> _barkodTaraMarket() async {
    final barkod = _barkodController.text.trim();
    if (barkod.isEmpty) {
      Get.snackbar('Uyari', 'Barkod numarasi girin veya kamera ile tarayin',
          backgroundColor: AkcaliTema.uyari.withAlpha(30),
          colorText: AkcaliTema.uyari);
      return;
    }

    _taraniyor.value = true;
    try {
      final urun = await _barkodServisi?.barkodIleUrunBul(barkod);
      if (urun != null) {
        final mevcut = _marketListesi.indexWhere(
            (k) => k.urun?.barkod == barkod || k.urun?.id == urun.id);
        if (mevcut >= 0) {
          _marketListesi[mevcut].adet++;
          _marketListesi.refresh();
        } else {
          _marketListesi.add(_MarketKalemi(urun: urun, adet: 1));
        }
        _toplamHesapla();
      } else {
        _yeniUrunDialoguGoster(barkod, marketModu: true);
      }
      _barkodController.clear();
    } catch (_) {
    } finally {
      _taraniyor.value = false;
    }
  }

  void _toplamHesapla() {
    double tahmini = 0, gercek = 0;
    for (final k in _marketListesi) {
      tahmini += (k.urun?.sonFiyat ?? 0) * k.adet;
      if (k.satinAlindi) gercek += k.gercekFiyat * k.adet;
    }
    _tahminiToplam.value = tahmini;
    _gercekToplam.value = gercek;
  }

  void _yeniUrunDialoguGoster(String barkod, {bool marketModu = false}) {
    final isimCtrl = TextEditingController();
    final markaCtrl = TextEditingController();
    final fiyatCtrl = TextEditingController();
    final kdvOrani = RxInt(10);
    final emoji = RxString('');

    final isDark = Theme.of(context).brightness == Brightness.dark;

    showDialog(
      context: context,
      builder: (_) => AlertDialog(
        backgroundColor: isDark ? AkcaliTema.koyuKart : Colors.white,
        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(20)),
        title: Row(children: [
          Icon(Icons.add_circle_outline_rounded,
              color: AkcaliTema.birincil, size: 28),
          const SizedBox(width: 8),
          Text('Yeni Urun',
              style: AkcaliTema.altBaslikStil.copyWith(
                  color: isDark ? AkcaliTema.koyuMetin : AkcaliTema.acikMetin)),
        ]),
        content: SingleChildScrollView(
          child: Column(mainAxisSize: MainAxisSize.min, children: [
            Container(
              padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
              decoration: BoxDecoration(
                color: AkcaliTema.birincil.withAlpha(20),
                borderRadius: BorderRadius.circular(12),
              ),
              child: Row(children: [
                Icon(Icons.qr_code_2_rounded,
                    color: AkcaliTema.birincil, size: 18),
                const SizedBox(width: 8),
                Expanded(
                  child: Text(barkod,
                      style: AkcaliTema.govdeStil.copyWith(
                          color: AkcaliTema.birincil,
                          fontWeight: FontWeight.w600)),
                ),
              ]),
            ),
            const SizedBox(height: 16),
            _dialogInput(isimCtrl, 'Urun Adi', Icons.shopping_bag_rounded,
                isDark),
            const SizedBox(height: 12),
            _dialogInput(
                markaCtrl, 'Marka', Icons.business_rounded, isDark),
            const SizedBox(height: 12),
            _dialogInput(fiyatCtrl, 'Fiyat (TL)', Icons.attach_money_rounded,
                isDark,
                klavye: TextInputType.numberWithOptions(decimal: true)),
            const SizedBox(height: 12),
            Obx(() => Row(children: [
                  Text('KDV: ',
                      style: AkcaliTema.govdeStil.copyWith(
                          color: isDark
                              ? AkcaliTema.koyuMetinIkincil
                              : AkcaliTema.acikMetinIkincil)),
                  for (final oran in [1, 10, 20])
                    Padding(
                      padding: const EdgeInsets.only(right: 6),
                      child: ChoiceChip(
                        label: Text('%$oran'),
                        selected: kdvOrani.value == oran,
                        selectedColor: AkcaliTema.birincil.withAlpha(40),
                        labelStyle: TextStyle(
                          color: kdvOrani.value == oran
                              ? AkcaliTema.birincil
                              : (isDark
                                  ? AkcaliTema.koyuMetinIkincil
                                  : AkcaliTema.acikMetinIkincil),
                          fontWeight: FontWeight.w600,
                          fontSize: 12,
                        ),
                        onSelected: (_) => kdvOrani.value = oran,
                      ),
                    ),
                ])),
            const SizedBox(height: 12),
            _dialogInput(
                TextEditingController(text: emoji.value),
                'Emoji (opsiyonel)',
                Icons.emoji_emotions_rounded,
                isDark,
                onChanged: (v) => emoji.value = v),
          ]),
        ),
        actions: [
          TextButton(
            onPressed: () => Navigator.of(context).pop(),
            child: Text('Iptal',
                style: TextStyle(
                    color: isDark
                        ? AkcaliTema.koyuMetinIkincil
                        : AkcaliTema.acikMetinIkincil)),
          ),
          ElevatedButton(
            onPressed: () async {
              if (isimCtrl.text.trim().isEmpty) return;
              final urun = await _barkodServisi?.barkodTanimla(
                barkod,
                isimCtrl.text.trim(),
                fiyat: double.tryParse(fiyatCtrl.text),
                marka: markaCtrl.text.trim().isEmpty
                    ? null
                    : markaCtrl.text.trim(),
                kdvOrani: kdvOrani.value,
              );
              if (mounted) Navigator.of(context).pop();
              if (urun != null) {
                _bulunanUrun.value = urun;
                _urunBulundu.value = true;
                if (marketModu) {
                  _marketListesi.add(_MarketKalemi(urun: urun, adet: 1));
                  _toplamHesapla();
                  _barkodController.clear();
                }
              }
            },
            style: ElevatedButton.styleFrom(
              backgroundColor: AkcaliTema.birincil,
              foregroundColor: Colors.white,
              shape: RoundedRectangleBorder(
                  borderRadius: BorderRadius.circular(12)),
            ),
            child: const Text('Kaydet'),
          ),
        ],
        )
    );
  }

  Widget _dialogInput(TextEditingController ctrl, String hint, IconData icon,
      bool isDark,
      {TextInputType? klavye, ValueChanged<String>? onChanged}) {
    return TextField(
      controller: ctrl,
      keyboardType: klavye,
      onChanged: onChanged,
      style: AkcaliTema.govdeStil.copyWith(
          color: isDark ? AkcaliTema.koyuMetin : AkcaliTema.acikMetin),
      decoration: InputDecoration(
        hintText: hint,
        hintStyle: TextStyle(
            color: isDark
                ? AkcaliTema.koyuMetinIkincil
                : AkcaliTema.acikMetinIkincil),
        prefixIcon: Icon(icon, color: AkcaliTema.birincil, size: 20),
        filled: true,
        fillColor: isDark
            ? AkcaliTema.koyuKartVurgulu
            : AkcaliTema.acikArkaplan,
        border: OutlineInputBorder(
            borderRadius: BorderRadius.circular(14),
            borderSide: BorderSide.none),
        contentPadding:
            const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    final isDark = Theme.of(context).brightness == Brightness.dark;

    return Scaffold(
      backgroundColor:
          isDark ? AkcaliTema.koyuArkaplan : AkcaliTema.acikArkaplan,
      body: Column(children: [
        _baslik(isDark),
        _tabBar(isDark),
        Expanded(
          child: TabBarView(
            controller: _tabController,
            children: [
              _taraModuSayfasi(isDark),
              _marketModuSayfasi(isDark),
            ],
          ),
        ),
      ]),
    );
  }

  Widget _baslik(bool isDark) {
    return Container(
      padding: EdgeInsets.only(
        top: MediaQuery.of(context).padding.top + 8,
        left: 16,
        right: 16,
        bottom: 8,
      ),
      decoration: BoxDecoration(
        gradient: AkcaliTema.birincilGradyan,
        borderRadius: const BorderRadius.vertical(bottom: Radius.circular(24)),
        boxShadow: AkcaliTema.neonGolge(AkcaliTema.birincil, yogunluk: 0.2),
      ),
      child: Row(children: [
        IconButton(
          icon: const Icon(Icons.arrow_back_rounded, color: Colors.white),
          onPressed: () => Navigator.pop(context),
        ),
        const SizedBox(width: 4),
        Icon(Icons.qr_code_scanner_rounded, color: Colors.white, size: 28),
        const SizedBox(width: 10),
        Expanded(
          child: Text('Barkod Okuyucu',
              style: AkcaliTema.altBaslikStil.copyWith(color: Colors.white)),
        ),
      ]),
    );
  }

  Widget _tabBar(bool isDark) {
    return Container(
      margin: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
      decoration: AkcaliTema.camKart(
        renk: isDark ? Colors.white : AkcaliTema.birincil,
        opaklik: isDark ? 0.06 : 0.08,
      ),
      child: TabBar(
        controller: _tabController,
        indicator: BoxDecoration(
          borderRadius: BorderRadius.circular(16),
          color: AkcaliTema.birincil,
          boxShadow: AkcaliTema.neonGolge(AkcaliTema.birincil, yogunluk: 0.3),
        ),
        indicatorSize: TabBarIndicatorSize.tab,
        dividerHeight: 0,
        labelColor: Colors.white,
        unselectedLabelColor:
            isDark ? AkcaliTema.koyuMetinIkincil : AkcaliTema.acikMetinIkincil,
        labelStyle:
            AkcaliTema.govdeStil.copyWith(fontWeight: FontWeight.w600),
        tabs: const [
          Tab(
            icon: Icon(Icons.qr_code_2_rounded, size: 20),
            text: 'Barkod Tara',
          ),
          Tab(
            icon: Icon(Icons.shopping_cart_rounded, size: 20),
            text: 'Market Modu',
          ),
        ],
      ),
    );
  }

  // ============================================================
  // MODE 1: BARKOD TARA
  // ============================================================

  Widget _taraModuSayfasi(bool isDark) {
    return SingleChildScrollView(
      padding: const EdgeInsets.symmetric(horizontal: 16),
      child: Column(children: [
        _tarayiciKart(isDark, onTara: _barkodTara),
        const SizedBox(height: 16),
        Obx(() {
          if (_taraniyor.value) {
            return _yuklemeKarti(isDark);
          }
          if (_urunBulundu.value && _bulunanUrun.value != null) {
            return _urunSonucKarti(isDark, _bulunanUrun.value!);
          }
          if (_sonBarkod.value.isNotEmpty && !_urunBulundu.value) {
            return _bulunamadiKarti(isDark);
          }
          return _bosIpucu(isDark);
        }),
        const SizedBox(height: 24),
      ]),
    );
  }

  Widget _tarayiciKart(bool isDark, {required VoidCallback onTara, bool marketModu = false}) {
    return Container(
      padding: const EdgeInsets.all(20),
      decoration: AkcaliTema.camKart(
        renk: isDark ? Colors.white : AkcaliTema.birincil,
        opaklik: isDark ? 0.06 : 0.05,
      ),
      child: Column(children: [
        AnimatedContainer(
          duration: AkcaliTema.normalAnim,
          padding: const EdgeInsets.symmetric(horizontal: 4),
          child: TextField(
            controller: _barkodController,
            focusNode: _barkodFocus,
            textAlign: TextAlign.center,
            style: AkcaliTema.tutarOrta.copyWith(
              color: isDark ? AkcaliTema.koyuMetin : AkcaliTema.acikMetin,
              letterSpacing: 3,
              fontFamily: 'monospace',
            ),
            keyboardType: TextInputType.number,
            inputFormatters: [FilteringTextInputFormatter.digitsOnly],
            onSubmitted: (_) => onTara(),
            decoration: InputDecoration(
              hintText: 'Barkod numarasi girin...',
              hintStyle: TextStyle(
                color: isDark
                    ? AkcaliTema.koyuMetinIkincil
                    : AkcaliTema.acikMetinIkincil,
                fontSize: 16,
                letterSpacing: 1,
              ),
              prefixIcon: Icon(Icons.qr_code_2_rounded,
                  color: AkcaliTema.birincil, size: 24),
              suffixIcon: IconButton(
                icon: Icon(Icons.content_paste_rounded,
                    color: AkcaliTema.birincilAcik),
                onPressed: () async {
                  final data = await Clipboard.getData(Clipboard.kTextPlain);
                  if (data?.text != null) {
                    _barkodController.text = data!.text!;
                  }
                },
              ),
              filled: true,
              fillColor: isDark
                  ? AkcaliTema.koyuKartVurgulu
                  : Colors.white,
              border: OutlineInputBorder(
                borderRadius: BorderRadius.circular(16),
                borderSide: BorderSide.none,
              ),
              focusedBorder: OutlineInputBorder(
                borderRadius: BorderRadius.circular(16),
                borderSide:
                    BorderSide(color: AkcaliTema.birincil, width: 1.5),
              ),
              contentPadding:
                  const EdgeInsets.symmetric(horizontal: 20, vertical: 18),
            ),
          ),
        ),
        const SizedBox(height: 16),
        Row(children: [
          Expanded(
            child: SizedBox(
              height: 52,
              child: FilledButton.icon(
                onPressed: () => _kameraIleTara(marketModu: marketModu),
                icon: const Icon(Icons.camera_alt_rounded, size: 22),
                label: Text('Kamera',
                    style: AkcaliTema.altBaslikStil.copyWith(color: Colors.white, fontSize: 14)),
                style: FilledButton.styleFrom(
                  backgroundColor: AkcaliTema.ikincil,
                  shape: RoundedRectangleBorder(
                      borderRadius: BorderRadius.circular(16)),
                ),
              ),
            ),
          ),
          const SizedBox(width: 10),
          Expanded(
            child: SizedBox(
              height: 52,
              child: FilledButton.icon(
                onPressed: onTara,
                icon: const Icon(Icons.search_rounded, size: 22),
                label: Text('Tara',
                    style: AkcaliTema.altBaslikStil.copyWith(color: Colors.white, fontSize: 14)),
                style: FilledButton.styleFrom(
                  backgroundColor: AkcaliTema.birincil,
                  shape: RoundedRectangleBorder(
                      borderRadius: BorderRadius.circular(16)),
                ),
              ),
            ),
          ),
        ]),
      ]),
    );
  }

  Widget _yuklemeKarti(bool isDark) {
    return Container(
      padding: const EdgeInsets.all(32),
      decoration: AkcaliTema.camKart(
        renk: isDark ? Colors.white : AkcaliTema.birincil,
        opaklik: isDark ? 0.06 : 0.05,
      ),
      child: Column(children: [
        SizedBox(
          width: 40,
          height: 40,
          child: CircularProgressIndicator(
            strokeWidth: 3,
            color: AkcaliTema.birincil,
          ),
        ),
        const SizedBox(height: 12),
        Text('Urun araniyor...',
            style: AkcaliTema.govdeStil.copyWith(
                color: isDark
                    ? AkcaliTema.koyuMetinIkincil
                    : AkcaliTema.acikMetinIkincil)),
      ]),
    );
  }

  Widget _urunSonucKarti(bool isDark, Urun urun) {
    final degisim = urun.fiyatDegisimYuzdesi;
    final degisimRenk =
        degisim > 0 ? AkcaliTema.gider : (degisim < 0 ? AkcaliTema.gelir : AkcaliTema.bilgi);

    return Container(
      padding: const EdgeInsets.all(20),
      decoration: AkcaliTema.camKart(
        renk: isDark ? Colors.white : AkcaliTema.birincil,
        opaklik: isDark ? 0.06 : 0.05,
      ),
      child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
        Row(children: [
          Container(
            width: 48,
            height: 48,
            decoration: BoxDecoration(
              color: urun.rengi.withAlpha(30),
              borderRadius: BorderRadius.circular(14),
            ),
            alignment: Alignment.center,
            child: Text(
              urun.simge ?? '',
              style: const TextStyle(fontSize: 24),
            ),
          ),
          const SizedBox(width: 12),
          Expanded(
            child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(urun.ismi ?? 'Urun',
                      style: AkcaliTema.altBaslikStil.copyWith(
                          color: isDark
                              ? AkcaliTema.koyuMetin
                              : AkcaliTema.acikMetin)),
                  if (urun.marka != null)
                    Text(urun.marka!,
                        style: AkcaliTema.etiketStil.copyWith(
                            color: isDark
                                ? AkcaliTema.koyuMetinIkincil
                                : AkcaliTema.acikMetinIkincil)),
                ]),
          ),
          Container(
            padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 6),
            decoration: BoxDecoration(
              color: degisimRenk.withAlpha(25),
              borderRadius: BorderRadius.circular(10),
            ),
            child: Row(mainAxisSize: MainAxisSize.min, children: [
              Icon(
                degisim > 0
                    ? Icons.trending_up_rounded
                    : (degisim < 0
                        ? Icons.trending_down_rounded
                        : Icons.trending_flat_rounded),
                color: degisimRenk,
                size: 16,
              ),
              const SizedBox(width: 4),
              Text('${degisim.toStringAsFixed(1)}%',
                  style: AkcaliTema.etiketStil
                      .copyWith(color: degisimRenk, fontWeight: FontWeight.w700)),
            ]),
          ),
        ]),
        const SizedBox(height: 16),
        Row(children: [
          _fiyatBadge(isDark, 'Son Fiyat', urun.sonFiyat, AkcaliTema.birincil),
          const SizedBox(width: 8),
          _fiyatBadge(isDark, 'En Dusuk', urun.enDusukFiyat, AkcaliTema.gelir),
          const SizedBox(width: 8),
          _fiyatBadge(
              isDark, 'En Yuksek', urun.enYuksekFiyat, AkcaliTema.gider),
        ]),
        const SizedBox(height: 12),
        Row(children: [
          Expanded(
            child: Text(
                '${urun.toplamGirisSayisi} kayit | KDV %${urun.kdvOrani}',
                style: AkcaliTema.etiketStil.copyWith(
                    color: isDark
                        ? AkcaliTema.koyuMetinIkincil
                        : AkcaliTema.acikMetinIkincil)),
          ),
        ]),
        const SizedBox(height: 16),
        Row(children: [
          Expanded(
            child: OutlinedButton.icon(
              onPressed: () async {
                try {
                  final listeler = _barkodServisi?.aktifListeler;
                  if (listeler != null && listeler.isNotEmpty) {
                    await _barkodServisi?.alisverisKalemiEkle(
                      listeler.first.id,
                      urun: urun,
                      adet: 1,
                    );
                    Get.snackbar('Basarili', '${urun.ismi} listeye eklendi',
                        backgroundColor: AkcaliTema.gelir.withAlpha(30),
                        colorText: AkcaliTema.gelir);
                  } else {
                    Get.snackbar('Uyari', 'Aktif alisveris listesi bulunamadi',
                        backgroundColor: AkcaliTema.uyari.withAlpha(30),
                        colorText: AkcaliTema.uyari);
                  }
                } catch (_) {}
              },
              icon: Icon(Icons.list_alt_rounded,
                  color: AkcaliTema.birincil, size: 18),
              label: Text('Listeye Ekle',
                  style: TextStyle(color: AkcaliTema.birincil, fontSize: 13)),
              style: OutlinedButton.styleFrom(
                side: BorderSide(color: AkcaliTema.birincil.withAlpha(80)),
                shape: RoundedRectangleBorder(
                    borderRadius: BorderRadius.circular(12)),
                padding:
                    const EdgeInsets.symmetric(horizontal: 12, vertical: 10),
              ),
            ),
          ),
          const SizedBox(width: 10),
          Expanded(
            child: FilledButton.icon(
              onPressed: () {
                // TODO: Harcama ekleme sayfasina yonlendir
                Get.snackbar('Bilgi', 'Harcama ekle - yakinda',
                    backgroundColor: AkcaliTema.bilgi.withAlpha(30),
                    colorText: AkcaliTema.bilgi);
              },
              icon: const Icon(Icons.receipt_long_rounded, size: 18),
              label:
                  const Text('Harcama Ekle', style: TextStyle(fontSize: 13)),
              style: FilledButton.styleFrom(
                backgroundColor: AkcaliTema.gider,
                shape: RoundedRectangleBorder(
                    borderRadius: BorderRadius.circular(12)),
                padding:
                    const EdgeInsets.symmetric(horizontal: 12, vertical: 10),
              ),
            ),
          ),
        ]),
      ]),
    );
  }

  Widget _fiyatBadge(bool isDark, String etiket, double fiyat, Color renk) {
    return Expanded(
      child: Container(
        padding: const EdgeInsets.symmetric(vertical: 8),
        decoration: BoxDecoration(
          color: renk.withAlpha(15),
          borderRadius: BorderRadius.circular(12),
        ),
        child: Column(children: [
          Text(etiket,
              style: AkcaliTema.etiketStil.copyWith(
                  color: isDark
                      ? AkcaliTema.koyuMetinIkincil
                      : AkcaliTema.acikMetinIkincil,
                  fontSize: 10)),
          const SizedBox(height: 2),
          Text(AkcaliTema.tutarFormat(fiyat),
              style: AkcaliTema.tutarKucuk.copyWith(color: renk)),
        ]),
      ),
    );
  }

  Widget _bulunamadiKarti(bool isDark) {
    return Container(
      padding: const EdgeInsets.all(24),
      decoration: AkcaliTema.camKart(
        renk: isDark ? Colors.white : AkcaliTema.uyari,
        opaklik: isDark ? 0.06 : 0.05,
      ),
      child: Column(children: [
        Icon(Icons.search_off_rounded,
            color: AkcaliTema.uyari, size: 48),
        const SizedBox(height: 12),
        Text('Urun bulunamadi',
            style: AkcaliTema.altBaslikStil.copyWith(
                color: isDark
                    ? AkcaliTema.koyuMetin
                    : AkcaliTema.acikMetin)),
        const SizedBox(height: 4),
        Text('Yeni urun olarak tanimlamak ister misiniz?',
            style: AkcaliTema.govdeStil.copyWith(
                color: isDark
                    ? AkcaliTema.koyuMetinIkincil
                    : AkcaliTema.acikMetinIkincil)),
        const SizedBox(height: 16),
        FilledButton.icon(
          onPressed: () => _yeniUrunDialoguGoster(_sonBarkod.value),
          icon: const Icon(Icons.add_rounded, size: 20),
          label: const Text('Yeni Urun Tanimla'),
          style: FilledButton.styleFrom(
            backgroundColor: AkcaliTema.birincil,
            shape: RoundedRectangleBorder(
                borderRadius: BorderRadius.circular(14)),
          ),
        ),
      ]),
    );
  }

  Widget _bosIpucu(bool isDark) {
    return Container(
      padding: const EdgeInsets.all(32),
      decoration: AkcaliTema.camKart(
        renk: isDark ? Colors.white : AkcaliTema.birincil,
        opaklik: isDark ? 0.04 : 0.03,
      ),
      child: Column(children: [
        Icon(Icons.qr_code_scanner_rounded,
            color: (isDark ? AkcaliTema.koyuMetinIkincil : AkcaliTema.acikMetinIkincil)
                .withAlpha(80),
            size: 64),
        const SizedBox(height: 12),
        Text('Barkod numarasi girerek urun arayabilirsiniz',
            textAlign: TextAlign.center,
            style: AkcaliTema.govdeStil.copyWith(
                color: isDark
                    ? AkcaliTema.koyuMetinIkincil
                    : AkcaliTema.acikMetinIkincil)),
      ]),
    );
  }

  // ============================================================
  // MODE 2: MARKET MODU
  // ============================================================

  Widget _marketModuSayfasi(bool isDark) {
    return Column(children: [
      _marketBaslik(isDark),
      Padding(
        padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
        child: _tarayiciKart(isDark, onTara: _barkodTaraMarket, marketModu: true),
      ),
      Expanded(
        child: Obx(() {
          if (_marketListesi.isEmpty) {
            return Center(
              child: Column(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    Icon(Icons.shopping_cart_outlined,
                        color: (isDark
                                ? AkcaliTema.koyuMetinIkincil
                                : AkcaliTema.acikMetinIkincil)
                            .withAlpha(80),
                        size: 64),
                    const SizedBox(height: 12),
                    Text('Urun tarayarak listeye ekleyin',
                        style: AkcaliTema.govdeStil.copyWith(
                            color: isDark
                                ? AkcaliTema.koyuMetinIkincil
                                : AkcaliTema.acikMetinIkincil)),
                  ]),
            );
          }
          return ListView.separated(
            padding: const EdgeInsets.symmetric(horizontal: 16),
            itemCount: _marketListesi.length,
            separatorBuilder: (_, __) => const SizedBox(height: 8),
            itemBuilder: (_, i) => _marketKalemKarti(isDark, i),
          );
        }),
      ),
      _marketOzet(isDark),
    ]);
  }

  Widget _marketBaslik(bool isDark) {
    return Obx(() => Container(
          margin: const EdgeInsets.symmetric(horizontal: 16),
          padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
          decoration: AkcaliTema.camKart(
            renk: isDark ? Colors.white : AkcaliTema.ikincil,
            opaklik: isDark ? 0.06 : 0.05,
          ),
          child: Row(children: [
            Icon(Icons.storefront_rounded,
                color: AkcaliTema.ikincil, size: 22),
            const SizedBox(width: 10),
            Expanded(
              child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(_aktifListeAdi.value,
                        style: AkcaliTema.govdeStil.copyWith(
                            color: isDark
                                ? AkcaliTema.koyuMetin
                                : AkcaliTema.acikMetin,
                            fontWeight: FontWeight.w600)),
                    Text(
                        '${_marketListesi.length} urun | Tahmini: ${AkcaliTema.tutarFormat(_tahminiToplam.value)}',
                        style: AkcaliTema.etiketStil.copyWith(
                            color: isDark
                                ? AkcaliTema.koyuMetinIkincil
                                : AkcaliTema.acikMetinIkincil)),
                  ]),
            ),
          ]),
        ));
  }

  Widget _marketKalemKarti(bool isDark, int index) {
    return Obx(() {
      final kalem = _marketListesi[index];
      final urun = kalem.urun;

      return AnimatedContainer(
        duration: AkcaliTema.hizliAnim,
        padding: const EdgeInsets.all(14),
        decoration: AkcaliTema.camKart(
          renk: isDark
              ? (kalem.satinAlindi ? AkcaliTema.gelir : Colors.white)
              : (kalem.satinAlindi ? AkcaliTema.gelir : AkcaliTema.birincil),
          opaklik: kalem.satinAlindi ? 0.08 : (isDark ? 0.06 : 0.05),
        ),
        child: Column(children: [
          Row(children: [
            GestureDetector(
              onTap: () {
                kalem.satinAlindi = !kalem.satinAlindi;
                _marketListesi.refresh();
                _toplamHesapla();
              },
              child: AnimatedContainer(
                duration: AkcaliTema.hizliAnim,
                width: 28,
                height: 28,
                decoration: BoxDecoration(
                  color: kalem.satinAlindi
                      ? AkcaliTema.gelir
                      : Colors.transparent,
                  borderRadius: BorderRadius.circular(8),
                  border: Border.all(
                    color: kalem.satinAlindi
                        ? AkcaliTema.gelir
                        : (isDark
                            ? AkcaliTema.koyuSinir
                            : AkcaliTema.acikSinir),
                    width: 2,
                  ),
                ),
                child: kalem.satinAlindi
                    ? const Icon(Icons.check_rounded,
                        color: Colors.white, size: 18)
                    : null,
              ),
            ),
            const SizedBox(width: 12),
            if (urun?.simge != null && urun!.simge!.isNotEmpty)
              Padding(
                padding: const EdgeInsets.only(right: 8),
                child: Text(urun.simge!, style: const TextStyle(fontSize: 20)),
              ),
            Expanded(
              child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(urun?.ismi ?? 'Urun',
                        style: AkcaliTema.govdeStil.copyWith(
                          color: isDark
                              ? AkcaliTema.koyuMetin
                              : AkcaliTema.acikMetin,
                          fontWeight: FontWeight.w600,
                          decoration: kalem.satinAlindi
                              ? TextDecoration.lineThrough
                              : null,
                        )),
                    Text(
                        'Beklenen: ${AkcaliTema.tutarFormat(urun?.sonFiyat ?? 0)}',
                        style: AkcaliTema.etiketStil.copyWith(
                            color: isDark
                                ? AkcaliTema.koyuMetinIkincil
                                : AkcaliTema.acikMetinIkincil)),
                  ]),
            ),
            // Adet kontrol
            Container(
              decoration: BoxDecoration(
                color: isDark
                    ? AkcaliTema.koyuKartVurgulu
                    : AkcaliTema.acikArkaplan,
                borderRadius: BorderRadius.circular(10),
              ),
              child: Row(mainAxisSize: MainAxisSize.min, children: [
                _adetButon(Icons.remove_rounded, () {
                  if (kalem.adet > 1) {
                    kalem.adet--;
                    _marketListesi.refresh();
                    _toplamHesapla();
                  } else {
                    _marketListesi.removeAt(index);
                    _toplamHesapla();
                  }
                }, isDark),
                Padding(
                  padding: const EdgeInsets.symmetric(horizontal: 8),
                  child: Text('${kalem.adet}',
                      style: AkcaliTema.govdeStil.copyWith(
                          color: isDark
                              ? AkcaliTema.koyuMetin
                              : AkcaliTema.acikMetin,
                          fontWeight: FontWeight.w700)),
                ),
                _adetButon(Icons.add_rounded, () {
                  kalem.adet++;
                  _marketListesi.refresh();
                  _toplamHesapla();
                }, isDark),
              ]),
            ),
          ]),
          if (kalem.satinAlindi) ...[
            const SizedBox(height: 10),
            Row(children: [
              const SizedBox(width: 40),
              Expanded(
                child: TextField(
                  keyboardType:
                      const TextInputType.numberWithOptions(decimal: true),
                  onChanged: (v) {
                    kalem.gercekFiyat = double.tryParse(v) ?? 0;
                    _toplamHesapla();
                  },
                  style: AkcaliTema.govdeStil.copyWith(
                      color: isDark
                          ? AkcaliTema.koyuMetin
                          : AkcaliTema.acikMetin),
                  decoration: InputDecoration(
                    hintText: 'Gercek fiyat (TL)',
                    hintStyle: TextStyle(
                        color: isDark
                            ? AkcaliTema.koyuMetinIkincil
                            : AkcaliTema.acikMetinIkincil,
                        fontSize: 13),
                    prefixIcon: Icon(Icons.attach_money_rounded,
                        color: AkcaliTema.gelir, size: 18),
                    filled: true,
                    fillColor: isDark
                        ? AkcaliTema.koyuKartVurgulu
                        : Colors.white,
                    border: OutlineInputBorder(
                      borderRadius: BorderRadius.circular(10),
                      borderSide: BorderSide.none,
                    ),
                    isDense: true,
                    contentPadding: const EdgeInsets.symmetric(
                        horizontal: 12, vertical: 10),
                  ),
                ),
              ),
            ]),
          ],
        ]),
      );
    });
  }

  Widget _adetButon(IconData icon, VoidCallback onTap, bool isDark) {
    return InkWell(
      onTap: onTap,
      borderRadius: BorderRadius.circular(8),
      child: Padding(
        padding: const EdgeInsets.all(6),
        child: Icon(icon,
            size: 18,
            color: isDark
                ? AkcaliTema.koyuMetinIkincil
                : AkcaliTema.acikMetinIkincil),
      ),
    );
  }

  Widget _marketOzet(bool isDark) {
    return Obx(() {
      if (_marketListesi.isEmpty) return const SizedBox.shrink();

      final fark = _gercekToplam.value - _tahminiToplam.value;
      final farkRenk = fark > 0 ? AkcaliTema.gider : AkcaliTema.gelir;

      return Container(
        padding: const EdgeInsets.all(16),
        decoration: BoxDecoration(
          color: isDark ? AkcaliTema.koyuKart : Colors.white,
          borderRadius:
              const BorderRadius.vertical(top: Radius.circular(24)),
          boxShadow: [
            BoxShadow(
              color: Colors.black.withAlpha(15),
              blurRadius: 20,
              offset: const Offset(0, -5),
            ),
          ],
        ),
        child: SafeArea(
          top: false,
          child: Column(mainAxisSize: MainAxisSize.min, children: [
            Row(children: [
              Expanded(
                child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Text('Tahmini',
                          style: AkcaliTema.etiketStil.copyWith(
                              color: isDark
                                  ? AkcaliTema.koyuMetinIkincil
                                  : AkcaliTema.acikMetinIkincil)),
                      Text(AkcaliTema.tutarFormat(_tahminiToplam.value),
                          style: AkcaliTema.tutarKucuk.copyWith(
                              color: isDark
                                  ? AkcaliTema.koyuMetin
                                  : AkcaliTema.acikMetin)),
                    ]),
              ),
              if (_gercekToplam.value > 0) ...[
                Expanded(
                  child: Column(
                      crossAxisAlignment: CrossAxisAlignment.center,
                      children: [
                        Text('Gercek',
                            style: AkcaliTema.etiketStil.copyWith(
                                color: isDark
                                    ? AkcaliTema.koyuMetinIkincil
                                    : AkcaliTema.acikMetinIkincil)),
                        Text(AkcaliTema.tutarFormat(_gercekToplam.value),
                            style: AkcaliTema.tutarKucuk
                                .copyWith(color: AkcaliTema.birincil)),
                      ]),
                ),
                Expanded(
                  child: Column(
                      crossAxisAlignment: CrossAxisAlignment.end,
                      children: [
                        Text('Fark',
                            style: AkcaliTema.etiketStil
                                .copyWith(color: farkRenk)),
                        Text(AkcaliTema.tutarFormat(fark),
                            style: AkcaliTema.tutarKucuk
                                .copyWith(color: farkRenk)),
                      ]),
                ),
              ],
            ]),
            const SizedBox(height: 12),
            SizedBox(
              width: double.infinity,
              height: 50,
              child: FilledButton.icon(
                onPressed: _alisverisiTamamla,
                icon: const Icon(Icons.check_circle_rounded, size: 22),
                label: Text('Alisverisi Tamamla',
                    style: AkcaliTema.altBaslikStil
                        .copyWith(color: Colors.white, fontSize: 16)),
                style: FilledButton.styleFrom(
                  backgroundColor: AkcaliTema.gelir,
                  shape: RoundedRectangleBorder(
                      borderRadius: BorderRadius.circular(16)),
                ),
              ),
            ),
          ]),
        ),
      );
    });
  }

  Future<void> _alisverisiTamamla() async {
    if (_marketListesi.isEmpty) return;

    final isar = _finansServis?.isar;
    if (isar == null) return;

    try {
      await isar.writeTxn(() async {
        final hareket = Hareket(tipi: 'Gider')
          ..ismi = 'Market Alisverisi'
          ..miktar = _gercekToplam.value > 0
              ? _gercekToplam.value
              : _tahminiToplam.value
          ..tarihi = DateTime.now();

        final hareketId = await isar.harekets.put(hareket);

        for (final kalem in _marketListesi) {
          final hk = HareketKalemi()
            ..ismi = kalem.urun?.ismi
            ..birimFiyat =
                kalem.satinAlindi ? kalem.gercekFiyat : (kalem.urun?.sonFiyat ?? 0)
            ..adet = kalem.adet.toDouble()
            ..tarihi = DateTime.now();

          hk.hareket.value = hareket;
          if (kalem.urun != null) hk.urun.value = kalem.urun;

          final kalemId = await isar.hareketKalemis.put(hk);
          await hk.hareket.save();
          await hk.urun.save();
        }
      });

      _marketListesi.clear();
      _tahminiToplam.value = 0;
      _gercekToplam.value = 0;

      Get.snackbar(
        'Basarili',
        'Alisveris kaydedildi',
        backgroundColor: AkcaliTema.gelir.withAlpha(30),
        colorText: AkcaliTema.gelir,
      );
    } catch (e) {
      Get.snackbar(
        'Hata',
        'Kayit sirasinda hata olustu',
        backgroundColor: AkcaliTema.tehlike.withAlpha(30),
        colorText: AkcaliTema.tehlike,
      );
    }
  }
}

class _MarketKalemi {
  Urun? urun;
  int adet;
  bool satinAlindi;
  double gercekFiyat;

  _MarketKalemi({
    this.urun,
    this.adet = 1,
    this.satinAlindi = false,
    this.gercekFiyat = 0,
  });
}

class _KameraTarayici extends StatefulWidget {
  @override
  State<_KameraTarayici> createState() => _KameraTarayiciState();
}

class _KameraTarayiciState extends State<_KameraTarayici> {
  final MobileScannerController _controller = MobileScannerController(
    detectionSpeed: DetectionSpeed.normal,
    facing: CameraFacing.back,
  );
  bool _barkodBulundu = false;

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

  @override
  Widget build(BuildContext context) {
    final isDark = Theme.of(context).brightness == Brightness.dark;

    return Scaffold(
      backgroundColor: Colors.black,
      body: Stack(
        children: [
          MobileScanner(
            controller: _controller,
            onDetect: (capture) {
              if (_barkodBulundu) return;
              final barcodes = capture.barcodes;
              if (barcodes.isNotEmpty && barcodes.first.rawValue != null) {
                _barkodBulundu = true;
                HapticFeedback.mediumImpact();
                Navigator.pop(context, barcodes.first.rawValue);
              }
            },
          ),
          SafeArea(
            child: Padding(
              padding: const EdgeInsets.all(16),
              child: Column(
                children: [
                  Row(
                    children: [
                      GestureDetector(
                        onTap: () => Navigator.pop(context),
                        child: Container(
                          padding: const EdgeInsets.all(10),
                          decoration: BoxDecoration(
                            color: Colors.black.withAlpha(120),
                            borderRadius: BorderRadius.circular(14),
                          ),
                          child: const Icon(Icons.arrow_back_rounded,
                              color: Colors.white, size: 22),
                        ),
                      ),
                      const Spacer(),
                      GestureDetector(
                        onTap: () => _controller.toggleTorch(),
                        child: Container(
                          padding: const EdgeInsets.all(10),
                          decoration: BoxDecoration(
                            color: Colors.black.withAlpha(120),
                            borderRadius: BorderRadius.circular(14),
                          ),
                          child: const Icon(Icons.flash_on_rounded,
                              color: Colors.white, size: 22),
                        ),
                      ),
                      const SizedBox(width: 8),
                      GestureDetector(
                        onTap: () => _controller.switchCamera(),
                        child: Container(
                          padding: const EdgeInsets.all(10),
                          decoration: BoxDecoration(
                            color: Colors.black.withAlpha(120),
                            borderRadius: BorderRadius.circular(14),
                          ),
                          child: const Icon(Icons.cameraswitch_rounded,
                              color: Colors.white, size: 22),
                        ),
                      ),
                    ],
                  ),
                  const Spacer(),
                  Container(
                    width: 260,
                    height: 260,
                    decoration: BoxDecoration(
                      border: Border.all(color: AkcaliTema.birincil, width: 2),
                      borderRadius: BorderRadius.circular(20),
                    ),
                  ),
                  const Spacer(),
                  Container(
                    padding: const EdgeInsets.symmetric(
                        horizontal: 20, vertical: 12),
                    decoration: BoxDecoration(
                      color: Colors.black.withAlpha(120),
                      borderRadius: BorderRadius.circular(16),
                    ),
                    child: const Text(
                      'Barkodu cerceve icine hizalayin',
                      style: TextStyle(
                          color: Colors.white,
                          fontSize: 14,
                          fontWeight: FontWeight.w500),
                    ),
                  ),
                  const SizedBox(height: 24),
                ],
              ),
            ),
          ),
        ],
      ),
    );
  }
}