#!/usr/bin/ruby

=begin
  API for calling DMChess engine written in c++
=end



require 'socket'

class DMChess

  DMCHESS="/opt/chess_bin/bin/main"

  def initialize port=16099
    @port = port
    unless File.exist?(DMCHESS)
      raise "Can't find dmchess at: "+DMCHESS
    end

    #puts 'Starting TcpServer at port '+@port.to_s
    Thread.new do
      puts `#{DMCHESS} tcp_server #{@port}`
    end
    sleep 4
    @dmchess = TCPSocket.new 'localhost', @port
  end


  #"true" / "false"
  def is_mate fen
    @dmchess.puts "is_mate #{fen}\r\n"
    @dmchess.gets.chomp
  end


  def bool_is_mate fen
    @dmchess.puts "is_mate #{fen}\r\n"
    x = @dmchess.gets.chomp
    return true if x == "true"
    return false if x == "false"
    raise "DmChess bool_is_mate error for fen #{fen} : "+x.to_s
  end


  def moves_and_fens fen
    @dmchess.puts "show_moves_and_fens #{fen}\r\n"
    resp = @dmchess.gets.chomp
    r2 = resp.split(';').map{ |x| x.split("|") }
    r2
  end

  def apply_long_move_w_short lmove, fen
    @dmchess.puts "apply_long_move_w_short #{lmove} #{fen}\r\n"
    resp = @dmchess.gets.chomp
    r2 = resp.split("|")
    r2
  end

  def move_name f1,f2
    @dmchess.puts "move_name #{f1}  #{f2}\r\n"
    resp = @dmchess.gets.chomp
  end

  def shorten_move move, fen
    raise "Empty FEN" if fen==""
    raise "Empty move" if move==""
    @dmchess.puts "shorten_move #{move} #{fen}\r\n"
    resp = @dmchess.gets.chomp
  end

  def apply_move fen, move
    @dmchess.puts "apply_move #{move} #{fen}\r\n"
    resp = @dmchess.gets.chomp
  end

end