part of 'editor_screen.dart';

mixin EditorLogic on ConsumerState<EditorScreen> {
  DocumentModel? _document;

  // Controllers
  final _tanggalCtrl = TextEditingController();
  final _noPoCtrl = TextEditingController();
  final _noSoCtrl = TextEditingController();
  final _noDoCtrl = TextEditingController();

  final _kepadaYthCtrl = TextEditingController();
  final _orderUntukCtrl = TextEditingController();
  final _alamatCtrl = TextEditingController();
  final _platTrukCtrl = TextEditingController();
  final _namaDriverCtrl = TextEditingController();
  final _namaPenerimaCtrl = TextEditingController();

  final _latitudeCtrl = TextEditingController();
  final _longitudeCtrl = TextEditingController();

  List<Map<String, TextEditingController>> _itemControllers = [];
  bool _isAgreed = false;
  final _formKey = GlobalKey<FormState>();

  void _loadDocumentData() {
    if (widget.pendingId == null) return;

    final pendingDocs = ref.read(pendingDocumentsProvider);
    final pendingDoc = pendingDocs.firstWhere(
      (doc) => doc.id == widget.pendingId,
      orElse: () => PendingDocument(id: '', imagePath: '')
    );

    if (pendingDoc.document != null) {
      final doc = pendingDoc.document!;
      setState(() {
        _document = doc;
        _tanggalCtrl.text = doc.tanggal;
        _noPoCtrl.text = doc.noPo;
        _noSoCtrl.text = doc.noSo;
        _noDoCtrl.text = doc.noDo;

        _kepadaYthCtrl.text = doc.kepadaYth;
        _orderUntukCtrl.text = doc.orderUntuk;
        _alamatCtrl.text = doc.alamat;
        _platTrukCtrl.text = doc.platTruk;
        _namaDriverCtrl.text = doc.namaDriver;

        final lat = pendingDoc.latitude ?? doc.latitude;
        final lng = pendingDoc.longitude ?? doc.longitude;
        _latitudeCtrl.text = lat != null ? lat.toString() : '-';
        _longitudeCtrl.text = lng != null ? lng.toString() : '-';

        for (var item in doc.items) {
          _addItem(
            sku: item.nomorSku,
            nama: item.namaBarang,
            banyak: item.banyak,
            jumlah: item.jumlah,
          );
        }
      });
    }
  }

  void _addItem({String sku = '', String nama = '', String banyak = '', String jumlah = ''}) {
    final skuCtrl = TextEditingController(text: sku);
    final namaCtrl = TextEditingController(text: nama);
    final banyakCtrl = TextEditingController(text: banyak);
    final jumlahCtrl = TextEditingController(text: jumlah);

    setState(() {
      _itemControllers.add({
        'sku': skuCtrl,
        'nama': namaCtrl,
        'banyak': banyakCtrl,
        'jumlah': jumlahCtrl,
      });
    });
  }

  void _removeItem(int index) {
    setState(() {
      final ctrls = _itemControllers[index];
      ctrls['sku']?.dispose();
      ctrls['nama']?.dispose();
      ctrls['banyak']?.dispose();
      ctrls['jumlah']?.dispose();
      _itemControllers.removeAt(index);
    });
  }

  void _showConfirmationDialog() {
    if (!_formKey.currentState!.validate()) return;

    showModalBottomSheet(
      context: context,
      isScrollControlled: true,
      shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(top: Radius.circular(20)),
      ),
      builder: (context) {
        return ConfirmationDialog(
          nameController: _namaPenerimaCtrl,
          initialAgreed: _isAgreed,
          onConfirm: (agreed, name) {
            setState(() {
              _isAgreed = agreed;
            });
            Navigator.pop(context);
            _submitDocument();
          },
        );
      }
    );
  }

  Future<void> _submitDocument() async {
    final pendingDocs = ref.read(pendingDocumentsProvider);
    final pendingDoc = pendingDocs.firstWhere(
      (doc) => doc.id == widget.pendingId,
      orElse: () => PendingDocument(id: '', imagePath: '')
    );
    final double? finalLat = pendingDoc.latitude ?? _document?.latitude;
    final double? finalLng = pendingDoc.longitude ?? _document?.longitude;

    final saveAction = resolveDocumentSaveAction(
      existingDocument: _document,
      localImagePath: pendingDoc.imagePath,
    );

    if (saveAction.kind == DocumentSaveActionKind.blocked) {
      if (!mounted) return;
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          content: Text(saveAction.blockedMessage!),
          backgroundColor: AppConfig.errorColor,
          duration: const Duration(seconds: 5),
        ),
      );
      return;
    }

    final apiClient = ref.read(apiClientProvider);
    String serverId;
    if (saveAction.kind == DocumentSaveActionKind.reuploadThenPut) {
      try {
        final formData = FormData.fromMap({
          'image': await MultipartFile.fromFile(
            pendingDoc.imagePath,
            filename: pendingDoc.imagePath.split(RegExp(r'[/\\]')).last,
          ),
          if (finalLat != null) 'latitude': finalLat.toString(),
          if (finalLng != null) 'longitude': finalLng.toString(),
          'scan_mode': pendingDoc.scanMode ?? 'DO',
        });
        final response = await apiClient.client.post(AppConfig.uploadDocumentEndpoint, data: formData);
        serverId = DocumentModel.fromJson(response.data['data']).id;
      } catch (e) {
        if (!mounted) return;
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(
            content: Text('Gagal membuat dokumen di server: ${ApiException.from(e).displayMessage}'),
            backgroundColor: AppConfig.errorColor,
            duration: const Duration(seconds: 5),
          ),
        );
        return;
      }
    } else {
      serverId = saveAction.serverId!;
    }

    final finalDoc = DocumentModel(
      id: serverId,
      tanggal: _tanggalCtrl.text,
      noPo: _noPoCtrl.text,
      noSo: _noSoCtrl.text,
      noDo: _noDoCtrl.text,
      kepadaYth: _kepadaYthCtrl.text,
      orderUntuk: _orderUntukCtrl.text,
      alamat: _alamatCtrl.text,
      platTruk: _platTrukCtrl.text,
      namaDriver: _namaDriverCtrl.text,
      namaPenerima: _namaPenerimaCtrl.text,
      latitude: finalLat,
      longitude: finalLng,
      items: _itemControllers.map((ctrls) => DocumentItem(
        nomorSku: ctrls['sku']!.text,
        namaBarang: ctrls['nama']!.text,
        banyak: ctrls['banyak']!.text,
        jumlah: ctrls['jumlah']!.text,
      )).toList(),
      createdAt: DateTime.now(),
    );

    final localStorage = ref.read(localStorageProvider);
    await localStorage.saveDocument(finalDoc);

    bool syncedToServer = false;
    String? syncError;
    try {
      await apiClient.client.put(
        '${AppConfig.fetchDocumentsEndpoint}/${finalDoc.id}',
        data: finalDoc.toPutPayload(),
      );
      syncedToServer = true;
    } catch (e) {
      syncError = ApiException.from(e).displayMessage;
    }

    if (widget.pendingId != null) {
      if (syncedToServer) {
        ref.read(pendingDocumentsProvider.notifier).removeDocument(widget.pendingId!);
      } else {
        ref.read(pendingDocumentsProvider.notifier).markSyncFailed(
          widget.pendingId!,
          finalDoc,
          'Belum tersinkron ke server: $syncError',
        );
      }
    }

    if (mounted) {
      ScaffoldMessenger.of(context).showSnackBar(
        syncedToServer
            ? const SnackBar(content: Text('Dokumen Berhasil Disimpan!'), backgroundColor: AppConfig.successColor)
            : const SnackBar(
                content: Text('Tersimpan lokal, tapi GAGAL sinkron ke server. Cek koneksi lalu retry dari daftar dokumen.'),
                backgroundColor: Colors.deepOrange,
                duration: Duration(seconds: 5),
              ),
      );
      context.pop(true);
    }
  }
}