game.rb

require './lib/position.rb'
require './lib/board.rb'
require './lib/game_piece.rb'
require './lib/move.rb'


# Remaining Items
# Implement mate condition
# Draw turn, check(mate) status, options to go back after piece selection
# Implement save / load game methods
# Pawn Promotion / En Passent
# Clean up - make more modular




class Game
  @save_filename = './save.yaml'
  def select_piece(pieces)
    puts "Select pieces to move: "
    input = gets.chomp
    pieces[input.to_i]
  end

  def select_move(moves)
    puts "Select space to move to"
    input = gets.chomp
    moves[input.to_i]
  end

  def save_game()
    yaml = YAML::dump(self)
    save_file = File.open(save_filename, "r") { |file| file.write(yaml) }
  end

  def load_game()
    File.open(save_filename, "w") do |file|
      yaml = file.read()
      YAML::load(yaml)
    end
  end

  def play
    @board = Board.new
    @board.init_pieces
    @board.draw
    @game = true
    @turn = :white
    @moved = false
    while @game

      @moved = false
      unless @moved

        #check_test(turn)
        moveable_pieces = @board.list_pieces(@turn)
        piece = select_piece(moveable_pieces)
        available_moves = @board.available_moves(piece)
        if available_moves.empty?
          puts "No legal moves available.  Hit enter to go back to piece selection"
          gets.chomp
          next
        end
        @board.list_moves(available_moves)
        move = select_move(available_moves)
        @board.remove_piece_at move.to if move.capture
        piece.position = move.to
        move.piece.mark_move if move.piece.class == Pawn


        @moved = true
      end

      @board.draw
      if @turn == :white
        @turn = :black
      else
        @turn = :white
      end

    end
  end
end

game = Game.new
game.play