import 'package:cdb_ui/api.dart';
import 'package:flutter/material.dart';

class ConsumePage extends StatefulWidget {
  final String item;
  final String variant;
  final String transaction;
  final Function refresh;

  const ConsumePage(this.transaction, this.item, this.variant, this.refresh,
      {super.key});

  @override
  State<ConsumePage> createState() => _ConsumePageState();
}

class _ConsumePageState extends State<ConsumePage> {
  final _formKey = GlobalKey<FormState>();
  String _selectedDestination = "";
  String _price = "";

  @override
  void initState() {
    super.initState();
  }

  void _consume() {
    if (_formKey.currentState!.validate()) {
      _formKey.currentState!.save();

      API()
          .consumeItem(widget.transaction, _selectedDestination, "$_price €")
          .then((_) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('Item consumed successfully!')),
        );
        Navigator.of(context).pop();
        widget.refresh();
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Consume Item'),
      ),
      body: FutureBuilder(
        future:
            API().getUniqueField(widget.item, widget.variant, "destination"),
        builder: (context, snapshot) {
          if (!snapshot.hasData) {
            return const Center(child: CircularProgressIndicator());
          }

          var destinations = snapshot.data!;

          return Padding(
            padding: const EdgeInsets.all(16.0),
            child: Form(
              key: _formKey,
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  // Destination Field with Dropdown and Text Input
                  Autocomplete<String>(
                    optionsBuilder: (TextEditingValue textEditingValue) {
                      if (textEditingValue.text.isEmpty) {
                        return destinations;
                      }
                      return destinations.where((String option) {
                        return option
                            .toLowerCase()
                            .contains(textEditingValue.text.toLowerCase());
                      });
                    },
                    onSelected: (String selection) {
                      setState(() {
                        _selectedDestination = selection;
                      });
                    },
                    fieldViewBuilder: (context, textEditingController,
                        focusNode, onFieldSubmitted) {
                      textEditingController.text = _selectedDestination;
                      return TextFormField(
                        onChanged: (value) {
                          _selectedDestination = value;
                        },
                        controller: textEditingController,
                        focusNode: focusNode,
                        decoration: const InputDecoration(
                          labelText: 'Destination',
                          border: OutlineInputBorder(),
                        ),
                        validator: (value) {
                          if (value?.isEmpty ?? true) {
                            return "Please enter a destination";
                          }

                          return null;
                        },
                      );
                    },
                  ),

                  const SizedBox(height: 16),

                  // Price Field
                  TextFormField(
                    decoration: const InputDecoration(labelText: 'Price'),
                    keyboardType: TextInputType.number,
                    initialValue: _price,
                    validator: (value) {
                      if (value == null || value.isEmpty) {
                        return 'Please enter a price';
                      }
                      if (double.tryParse(value) == null) {
                        return 'Please enter a valid number';
                      }
                      return null;
                    },
                    onSaved: (value) {
                      _price = value!;
                    },
                  ),

                  const SizedBox(height: 20),

                  // Submit Button
                  ElevatedButton(
                    onPressed: _consume,
                    child: const Text('Consume Item'),
                  ),
                ],
              ),
            ),
          );
        },
      ),
    );
  }
}