# Unicode Modul einbinden
require "unicode"
require "debug"

require "rubygems"
gem "highline"
require "highline"

require "field"
require "stone"

module Tetris
  FPS = 25

  class << self
    def start
      # Set up the Signal trapping
      Signal.trap("INT") { self.stop }

      # Console should return chars immediately

      Field.clear_screen
      Field.hide_cursor

      Field.draw_border

      stone = Stone.new(Stone::SPRITES["S"])
      stone.y = 3
      stone.x = 3

      loop do
        if c = get_character_nonblock
          case c
          when ?B
            stone.move_down
          when ?D
            stone.rotate_left
          when ?C
            stone.rotate_right
          end
        end

        stone.draw

        Field.move_cursor(1, Field::HEIGHT)
        Field.write(Time.now)
      end
    end

    def stop
      HighLine::SystemExtensions.restore_mode
      Field.move_cursor(1, Field::HEIGHT)
      exit
    end

    def get_character_nonblock
      HighLine::SystemExtensions.raw_no_echo_mode

      begin
        if IO.select([STDIN], [], [], 1.0 / FPS)
          return $stdin.getc
        end
      ensure
        HighLine::SystemExtensions.restore_mode
      end
    end
  end
end