import 'package:flutter/material.dart';
import 'package:cashumit/models/receipt_item.dart';

class AddItemScreen extends StatefulWidget {
  const AddItemScreen({super.key, this.item});
  
  // Constructor untuk mode edit
  const AddItemScreen.fromItem(this.item, {super.key});

  final ReceiptItem? item;

  @override
  State<AddItemScreen> createState() => _AddItemScreenState();
}

class _AddItemScreenState extends State<AddItemScreen> {
  final _formKey = GlobalKey<FormState>();
  late final TextEditingController _descriptionController;
  late final TextEditingController _quantityController;
  late final TextEditingController _priceController;

  @override
  void initState() {
    super.initState();
    
    // Inisialisasi controller dengan nilai default atau dari item yang diedit
    _descriptionController = TextEditingController(text: widget.item?.description ?? '');
    _quantityController = TextEditingController(text: widget.item != null ? widget.item!.quantity.toString() : '1');
    _priceController = TextEditingController(text: widget.item?.price.toString() ?? '');
  }

  @override
  void dispose() {
    _descriptionController.dispose();
    _quantityController.dispose();
    _priceController.dispose();
    super.dispose();
  }

  void _saveItem() {
    if (_formKey.currentState!.validate()) {
      final item = ReceiptItem(
        description: _descriptionController.text,
        quantity: int.parse(_quantityController.text),
        price: double.parse(_priceController.text),
      );
      
      Navigator.pop(context, item);
    }
  }

  @override
  Widget build(BuildContext context) {
    return AlertDialog(
      title: Text(widget.item == null ? 'Tambah Item' : 'Edit Item'),
      content: SingleChildScrollView(
        child: Form(
          key: _formKey,
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              TextFormField(
                controller: _descriptionController,
                decoration: const InputDecoration(
                  labelText: 'Deskripsi Item',
                  border: OutlineInputBorder(),
                ),
                validator: (value) {
                  if (value == null || value.isEmpty) {
                    return 'Mohon masukkan deskripsi item';
                  }
                  return null;
                },
              ),
              const SizedBox(height: 16),
              Row(
                children: [
                  Expanded(
                    child: TextFormField(
                      controller: _quantityController,
                      decoration: const InputDecoration(
                        labelText: 'Jumlah',
                        border: OutlineInputBorder(),
                      ),
                      keyboardType: TextInputType.number,
                      validator: (value) {
                        if (value == null || value.isEmpty) {
                          return 'Mohon masukkan jumlah';
                        }
                        if (int.tryParse(value) == null) {
                          return 'Jumlah harus berupa angka';
                        }
                        return null;
                      },
                    ),
                  ),
                  const SizedBox(width: 16),
                  Expanded(
                    child: TextFormField(
                      controller: _priceController,
                      decoration: const InputDecoration(
                        labelText: 'Harga',
                        border: OutlineInputBorder(),
                      ),
                      keyboardType: TextInputType.number,
                      validator: (value) {
                        if (value == null || value.isEmpty) {
                          return 'Mohon masukkan harga';
                        }
                        if (double.tryParse(value) == null) {
                          return 'Harga harus berupa angka';
                        }
                        return null;
                      },
                    ),
                  ),
                ],
              ),
            ],
          ),
        ),
      ),
      actions: [
        TextButton(
          onPressed: () => Navigator.pop(context),
          child: const Text('Batal'),
        ),
        ElevatedButton(
          onPressed: _saveItem,
          child: Text(widget.item == null ? 'Simpan' : 'Update'),
        ),
      ],
    );
  }
}