// Helpful guides:
// - https://flutter.dev/docs/cookbook/forms/validation

import 'package:flutter/material.dart';

void main() {
  runApp(const MainApp());
}

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

  @override
  State<MainApp> createState() => _MainAppState();
}

class _MainAppState extends State<MainApp> {
  final nameFieldController = TextEditingController();

  @override
  void dispose() {
    // Clean up the controller when the widget is disposed.
    nameFieldController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    const inputWidth = 400.0;
    const inputHeight = 50.0;

    const recurrenceValues = <DropdownMenuEntry>[
      DropdownMenuEntry(value: Recurrence.daily, label: "Daily"),
      DropdownMenuEntry(value: Recurrence.weekly, label: "Weekly"),
      DropdownMenuEntry(value: Recurrence.biweekly, label: "Biweekly"),
      DropdownMenuEntry(value: Recurrence.montly, label: "Monthly"),
      DropdownMenuEntry(value: Recurrence.yearly, label: "Yearly"),
      DropdownMenuEntry(value: null, label: ""),
    ];

    return const MaterialApp(
      home: Scaffold(
        body: Center(
          child: Column(mainAxisSize: MainAxisSize.min, spacing: 10, children: [
            Text('Input an expense below!'),
            SizedBox(
                width: inputWidth,
                height: inputHeight,
                child: TextField(
                  keyboardType: TextInputType.text,
                  decoration: InputDecoration(labelText: "Name", hintText: "Example: Red Pocket Phone Bill", ),
                  // https://docs.flutter.dev/cookbook/forms/retrieve-input
                  //controller: nameFieldController,
                )),
            SizedBox(
              width: inputWidth,
              height: inputHeight,
              child: TextField(
                keyboardType: TextInputType.numberWithOptions(decimal: true),
                decoration: InputDecoration(labelText: "Cost", hintText: "Example: 10.00"),
              ),
            ),
            DropdownMenu(
              dropdownMenuEntries: recurrenceValues,
              width: inputWidth,
              label: Text("Recurrence"),
              hintText: "Example: Monthly",
            ),
            SizedBox(
                width: inputWidth,
                height: inputHeight,
                child: TextField(
                  keyboardType: TextInputType.text,
                  decoration: InputDecoration(labelText: "Description", hintText: "Example: 1GB data with unlimited talk & text."),
                )),
          ]),
        ),
      ),
    );
  }
}

// https://www.tutorialspoint.com/dart_programming/dart_programming_enumeration.htm
enum Recurrence { daily, weekly, biweekly, montly, yearly }

class Expense {
  String name;
  double cost;
  Recurrence recurrence;
  String description;

  Expense(this.name, this.cost, this.recurrence, this.description);
}