require 'rubygems'
require 'gosu'

class Ducky
  attr_reader :x, :y, :timer

  def initialize(image, turnsLeft)
    @img = image
    @scale = (rand * 0.3) + 0.1
    @x = rand * 640
    @y = rand * 480
    @turn_x = rand * 0.6
    @turn_y = rand * 0.6
    @angle = rand(360)
    @turnDir = turnsLeft
    @colorMod = 0
    @alphaMod = 0
    @finalColor = 0xffffffff
    @timer = 0
  end

  def update
    if @turnDir == 0
      @angle += 1
      if  @angle > 360
        @angle = 0
      end
    end
    if @turnDir == 1
       @angle -= 1
      if  @angle < 0
        @angle = 360
      end
    end

    if @colorMod < 255
      if rand(2) == 1
        @colorMod += 1
      end
    else
        @alphaMod += 5
        if @alphaMod > 100
          @alphaMod = 0
        end

        @timer += 1
    end

   @finalColor = 0xffffffff - (0x00000101 * @colorMod) - (0x01000000 * @alphaMod)
  end

  def draw
    @img.draw_rot(@x, @y, 1, @angle, @turn_x, @turn_y, @scale, @scale, @finalColor);
  end
end

class GameWindow < Gosu::Window
  def initialize
    super(640, 480, false)
    self.caption = "Amie-Jo'z Game"

    @background_image = Gosu::Image.new(self, "tornado.png", true)
    @ducky_image = Gosu::Image.new(self, "duck.png", true)
    @ducks = Array.new
    @font = Gosu::Font.new(self, Gosu::default_font_name, 20)
    @score = 0
    @lives = 10
    @squeak = Gosu::Sample.new(self, "squeak.wav")
    @alreadyClicked = false
  end

  def update
    if !button_down? Gosu::Button::MsLeft
      @alreadyClicked = false
    end
    if rand(100) < 4 and @ducks.size < 25 then
      @ducks.push(Ducky.new(@ducky_image, rand(2)))
    end

    @ducks.reject! do |star|
      if Gosu::distance(star.x, star.y, self.mouse_x, self.mouse_y) < 50 and button_down? Gosu::Button::MsLeft and @alreadyClicked! and @lives > 0
        @score += 1
        @squeak.play
        @alreadyClicked = true
        true
      elsif star.timer > 100
        if @lives > -1
          @lives -= 1
    end
        true
      else
        false
      end
  end

  @ducks.each { |ducky| ducky.update }
end

  def draw
    @background_image.draw(0, 0, 0);
    @ducks.each { |ducky| ducky.draw }
    @font.draw("Score: #{@score}", 10, 10, 2, 1.0, 1.0, 0xffffffff)
    @font.draw("Lives: #{@lives}", 10, 30, 2, 1.0, 1.0, 0xffffffff)

    if @lives < 0
      @font.draw("GAME OVER!!1!", 120, 80, 2, 3.0, 3.0, 0xffffffff)
      @font.draw("Press Enter to Restart.", 240, 160, 2, 1.0, 1.0, 0xffffffff)
    end
  end

  def button_down(id)
    if id == Gosu::Button::KbEscape
      close
    end
    if id == Gosu::Button::KbReturn
      restart
    end
  end

  def needs_cursor?
    true
  end

  def restart
    @ducks = Array.new
    @score = 0
    @lives = 10
  end
end

window = GameWindow.new
window.show