// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Flutter code sample for [Action.Action.overridable].

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

void main() {
  runApp(
    const MaterialApp(
      home: Scaffold(
        body: Center(child: VerificationCodeGenerator()),
      ),
    ),
  );
}

const CopyTextIntent copyTextIntent = CopyTextIntent._();
class CopyTextIntent extends Intent {
  const CopyTextIntent._();
}

class CopyableText extends StatelessWidget {
  const CopyableText({ super.key, required this.text });

  final String text;

  void _copy(CopyTextIntent intent) => Clipboard.setData(ClipboardData(text: text));

  @override
  Widget build(BuildContext context) {
    final Action<CopyTextIntent> defaultCopyAction = CallbackAction<CopyTextIntent>(onInvoke: _copy);
    return Shortcuts(
      shortcuts: const <ShortcutActivator, Intent> { SingleActivator(LogicalKeyboardKey.keyC, control: true) : copyTextIntent },
      child: Actions(
        actions: <Type, Action<Intent>> {
          // The Action is made overridable so the VerificationCodeGenerator
          // widget can override how copying is handled.
          CopyTextIntent: Action<CopyTextIntent>.overridable(defaultAction: defaultCopyAction, context: context),
        },
        child: Focus(
          autofocus: true,
          child: DefaultTextStyle.merge(
            style: const TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
            child: Text(text),
          ),
        ),
      ),
    );
  }
}

class VerificationCodeGenerator extends StatelessWidget {
  const VerificationCodeGenerator({ super.key });

  void _copy(CopyTextIntent intent) {
    debugPrint('Content copied');
    Clipboard.setData(const ClipboardData(text: '111222333'));
  }

  @override
  Widget build(BuildContext context) {
    return Actions(
      actions: <Type, Action<Intent>> { CopyTextIntent: CallbackAction<CopyTextIntent>(onInvoke: _copy) },
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          const Text('Press Ctrl-C to Copy'),
          const SizedBox(height: 10),
          Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: const <Widget>[
              CopyableText(text: '111'),
              SizedBox(width: 5,),
              CopyableText(text: '222'),
              SizedBox(width: 5,),
              CopyableText(text: '333'),
            ],
          ),
        ],
      ),
    );
  }
}