enum Testament { old, newT }

class Book {
  const Book({
    required this.index,
    required this.name,
    required this.chapterCount,
    required this.testament,
  });

  final int index;
  final String name;
  final int chapterCount;
  final Testament testament;
}

class Bible {
  const Bible._();

  static const List<Book> books = <Book>[
    Book(index: 0, name: 'Genesis', chapterCount: 50, testament: Testament.old),
    Book(index: 1, name: 'Exodus', chapterCount: 40, testament: Testament.old),
    Book(
      index: 2,
      name: 'Leviticus',
      chapterCount: 27,
      testament: Testament.old,
    ),
    Book(index: 3, name: 'Numbers', chapterCount: 36, testament: Testament.old),
    Book(
      index: 4,
      name: 'Deuteronomy',
      chapterCount: 34,
      testament: Testament.old,
    ),
    Book(index: 5, name: 'Joshua', chapterCount: 24, testament: Testament.old),
    Book(index: 6, name: 'Judges', chapterCount: 21, testament: Testament.old),
    Book(index: 7, name: 'Ruth', chapterCount: 4, testament: Testament.old),
    Book(
      index: 8,
      name: '1 Samuel',
      chapterCount: 31,
      testament: Testament.old,
    ),
    Book(
      index: 9,
      name: '2 Samuel',
      chapterCount: 24,
      testament: Testament.old,
    ),
    Book(
      index: 10,
      name: '1 Kings',
      chapterCount: 22,
      testament: Testament.old,
    ),
    Book(
      index: 11,
      name: '2 Kings',
      chapterCount: 25,
      testament: Testament.old,
    ),
    Book(
      index: 12,
      name: '1 Chronicles',
      chapterCount: 29,
      testament: Testament.old,
    ),
    Book(
      index: 13,
      name: '2 Chronicles',
      chapterCount: 36,
      testament: Testament.old,
    ),
    Book(index: 14, name: 'Ezra', chapterCount: 10, testament: Testament.old),
    Book(
      index: 15,
      name: 'Nehemiah',
      chapterCount: 13,
      testament: Testament.old,
    ),
    Book(index: 16, name: 'Esther', chapterCount: 10, testament: Testament.old),
    Book(index: 17, name: 'Job', chapterCount: 42, testament: Testament.old),
    Book(
      index: 18,
      name: 'Psalms',
      chapterCount: 150,
      testament: Testament.old,
    ),
    Book(
      index: 19,
      name: 'Proverbs',
      chapterCount: 31,
      testament: Testament.old,
    ),
    Book(
      index: 20,
      name: 'Ecclesiastes',
      chapterCount: 12,
      testament: Testament.old,
    ),
    Book(
      index: 21,
      name: 'Song of Solomon',
      chapterCount: 8,
      testament: Testament.old,
    ),
    Book(index: 22, name: 'Isaiah', chapterCount: 66, testament: Testament.old),
    Book(
      index: 23,
      name: 'Jeremiah',
      chapterCount: 52,
      testament: Testament.old,
    ),
    Book(
      index: 24,
      name: 'Lamentations',
      chapterCount: 5,
      testament: Testament.old,
    ),
    Book(
      index: 25,
      name: 'Ezekiel',
      chapterCount: 48,
      testament: Testament.old,
    ),
    Book(index: 26, name: 'Daniel', chapterCount: 12, testament: Testament.old),
    Book(index: 27, name: 'Hosea', chapterCount: 14, testament: Testament.old),
    Book(index: 28, name: 'Joel', chapterCount: 3, testament: Testament.old),
    Book(index: 29, name: 'Amos', chapterCount: 9, testament: Testament.old),
    Book(index: 30, name: 'Obadiah', chapterCount: 1, testament: Testament.old),
    Book(index: 31, name: 'Jonah', chapterCount: 4, testament: Testament.old),
    Book(index: 32, name: 'Micah', chapterCount: 7, testament: Testament.old),
    Book(index: 33, name: 'Nahum', chapterCount: 3, testament: Testament.old),
    Book(
      index: 34,
      name: 'Habakkuk',
      chapterCount: 3,
      testament: Testament.old,
    ),
    Book(
      index: 35,
      name: 'Zephaniah',
      chapterCount: 3,
      testament: Testament.old,
    ),
    Book(index: 36, name: 'Haggai', chapterCount: 2, testament: Testament.old),
    Book(
      index: 37,
      name: 'Zechariah',
      chapterCount: 14,
      testament: Testament.old,
    ),
    Book(index: 38, name: 'Malachi', chapterCount: 4, testament: Testament.old),
    Book(
      index: 39,
      name: 'Matthew',
      chapterCount: 28,
      testament: Testament.newT,
    ),
    Book(index: 40, name: 'Mark', chapterCount: 16, testament: Testament.newT),
    Book(index: 41, name: 'Luke', chapterCount: 24, testament: Testament.newT),
    Book(index: 42, name: 'John', chapterCount: 21, testament: Testament.newT),
    Book(index: 43, name: 'Acts', chapterCount: 28, testament: Testament.newT),
    Book(
      index: 44,
      name: 'Romans',
      chapterCount: 16,
      testament: Testament.newT,
    ),
    Book(
      index: 45,
      name: '1 Corinthians',
      chapterCount: 16,
      testament: Testament.newT,
    ),
    Book(
      index: 46,
      name: '2 Corinthians',
      chapterCount: 13,
      testament: Testament.newT,
    ),
    Book(
      index: 47,
      name: 'Galatians',
      chapterCount: 6,
      testament: Testament.newT,
    ),
    Book(
      index: 48,
      name: 'Ephesians',
      chapterCount: 6,
      testament: Testament.newT,
    ),
    Book(
      index: 49,
      name: 'Philippians',
      chapterCount: 4,
      testament: Testament.newT,
    ),
    Book(
      index: 50,
      name: 'Colossians',
      chapterCount: 4,
      testament: Testament.newT,
    ),
    Book(
      index: 51,
      name: '1 Thessalonians',
      chapterCount: 5,
      testament: Testament.newT,
    ),
    Book(
      index: 52,
      name: '2 Thessalonians',
      chapterCount: 3,
      testament: Testament.newT,
    ),
    Book(
      index: 53,
      name: '1 Timothy',
      chapterCount: 6,
      testament: Testament.newT,
    ),
    Book(
      index: 54,
      name: '2 Timothy',
      chapterCount: 4,
      testament: Testament.newT,
    ),
    Book(index: 55, name: 'Titus', chapterCount: 3, testament: Testament.newT),
    Book(
      index: 56,
      name: 'Philemon',
      chapterCount: 1,
      testament: Testament.newT,
    ),
    Book(
      index: 57,
      name: 'Hebrews',
      chapterCount: 13,
      testament: Testament.newT,
    ),
    Book(index: 58, name: 'James', chapterCount: 5, testament: Testament.newT),
    Book(
      index: 59,
      name: '1 Peter',
      chapterCount: 5,
      testament: Testament.newT,
    ),
    Book(
      index: 60,
      name: '2 Peter',
      chapterCount: 3,
      testament: Testament.newT,
    ),
    Book(index: 61, name: '1 John', chapterCount: 5, testament: Testament.newT),
    Book(index: 62, name: '2 John', chapterCount: 1, testament: Testament.newT),
    Book(index: 63, name: '3 John', chapterCount: 1, testament: Testament.newT),
    Book(index: 64, name: 'Jude', chapterCount: 1, testament: Testament.newT),
    Book(
      index: 65,
      name: 'Revelation',
      chapterCount: 22,
      testament: Testament.newT,
    ),
  ];

  static int get totalChapters =>
      books.fold<int>(0, (int sum, Book book) => sum + book.chapterCount);

  static int get totalBooks => books.length;

  static int totalChaptersIn(Testament testament) => books
      .where((Book book) => book.testament == testament)
      .fold<int>(0, (int sum, Book book) => sum + book.chapterCount);

  static int totalBooksIn(Testament testament) =>
      books.where((Book book) => book.testament == testament).length;

  /// Chapter key used to identify a chapter in persisted state.
  static String chapterKey(int bookIndex, int chapter) => '$bookIndex:$chapter';
}