mirrored_repositories/flutterstudyjam_gdg
import 'package:flutter/material.dart';
import 'package:english_words/english_words.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Startup Name Generator',
      theme: ThemeData(          // Add the 3 lines from here...
        primaryColor: Colors.indigo[700],
      ),
      home: RandomWords(),
    );
  }
}

class RandomWordsState extends State<RandomWords> {
  final List<WordPair> _suggestions = <WordPair>[];
  final Set<WordPair> _saved = Set<WordPair>();
  final TextStyle _biggerFont = const TextStyle(fontSize: 18);
  @override
  Widget build(BuildContext context) {
    // TODO: implement build

    return Scaffold (                   // Add from here...
      appBar: AppBar(
        title: Text('Startup Name Generator'),
        actions: <Widget>[      // Add 3 lines from here...
          IconButton(icon: Icon(Icons.list), onPressed: _pushSaved),
        ],
      ),
      body: _buildSuggestions(),
    );
  }
  // TODO Add build method

  void _pushSaved() {
    Navigator.of(context).push(
      MaterialPageRoute<void>(
        builder: (BuildContext context) {
          final Iterable<ListTile> tiles = _saved.map(
                (WordPair pair) {
              return ListTile(
                title: Text(
                  pair.asPascalCase,
                  style: _biggerFont,
                ),
              );
            },
          );
          final List<Widget> divided = ListTile
              .divideTiles(
            context: context,
            tiles: tiles,
          )
              .toList();

          return Scaffold(         // Add 6 lines from here...
            appBar: AppBar(
              title: Text('Saved Suggestions'),
            ),
            body: ListView(children: divided),
          );                       // ... to here.
        },
      ),
    );
  }

  Widget _buildSuggestions() {
    return ListView.builder(
        padding: const EdgeInsets.all(16),
        // The itemBuilder callback is called once per suggested
        // word pairing, and places each suggestion into a ListTile
        // row. For even rows, the function adds a ListTile row for
        // the word pairing. For odd rows, the function adds a
        // Divider widget to visually separate the entries. Note that
        // the divider may be difficult to see on smaller devices.
        itemBuilder: (BuildContext _context, int i) {
          // Add a one-pixel-high divider widget before each row
          // in the ListView.
          if (i.isOdd) {
            return Divider();
          }

          // The syntax "i ~/ 2" divides i by 2 and returns an
          // integer result.
          // For example: 1, 2, 3, 4, 5 becomes 0, 1, 1, 2, 2.
          // This calculates the actual number of word pairings
          // in the ListView,minus the divider widgets.
          final int index = i ~/ 2;
          // If you've reached the end of the available word
          // pairings...
          if (index >= _suggestions.length) {
            // ...then generate 10 more and add them to the
            // suggestions list.
            _suggestions.addAll(generateWordPairs().take(10));
          }

          return _buildRow(_suggestions[index]);
        }
    );
  }

  Widget _buildRow(WordPair pair) {
    final bool alreadySaved = _saved.contains(pair);
    return ListTile(
      title: Text(
        pair.asPascalCase,
        style: _biggerFont,
      ),
      trailing: Icon(   // Add the lines from here...
        alreadySaved ? Icons.favorite : Icons.favorite_border,
        color: alreadySaved ? Colors.lightBlue : null,
      ),
    onTap: () { 
      setState(() {
        if (alreadySaved) {
          _saved.remove(pair);
        } else {
          _saved.add(pair);
        }
      });
    },
    );
  }
}

class RandomWords extends StatefulWidget {
  @override
  RandomWordsState createState() => RandomWordsState();
}

