require 'lcdrange.rb'
require 'cannon.rb'

class GameBoard < Qt::Widget
  slots 'fire()', 'hit()', 'missed()', 'newGame()'

  def initialize()
    super()

    quit = Qt::PushButton.new(tr('&Quit'))
    quit.font = Qt::Font.new('Times', 18, Qt::Font::Bold)
    
    connect(quit, SIGNAL('clicked()'), $qApp, SLOT('quit()'))
    
    angle = LCDRange.new(tr('ANGLE'))
    angle.setRange(5, 70)
    
    force  = LCDRange.new(tr('FORCE'))
    force.setRange(10, 50)
    
    cannonBox = Qt::Frame.new()
    cannonBox.setFrameStyle(Qt::Frame::WinPanel | Qt::Frame::Sunken)

    @cannonField = CannonField.new()

    connect(angle, SIGNAL('valueChanged(int)'),
            @cannonField, SLOT('setAngle(int)'))
    connect(@cannonField, SIGNAL('angleChanged(int)'),
            angle, SLOT('setValue(int)'))

    connect(force, SIGNAL('valueChanged(int)'),
            @cannonField, SLOT('setForce(int)'))
    connect(@cannonField, SIGNAL('forceChanged(int)'),
            force, SLOT('setValue(int)'))
    
    connect(@cannonField, SIGNAL('hit()'),
            self, SLOT('hit()'))
    connect(@cannonField, SIGNAL('missed()'),
            self, SLOT('missed()'))
    
    shoot = Qt::PushButton.new(tr('&Shoot'))
    shoot.setFont(Qt::Font.new('Times', 18, Qt::Font::Bold ))

    connect(shoot, SIGNAL('clicked()'), self, SLOT('fire()') )
    connect(@cannonField, SIGNAL('canShoot(bool)'),
            shoot, SLOT('setEnabled(bool)'))
    
    restart = Qt::PushButton.new(tr('&New Game'))
    restart.setFont(Qt::Font.new('Times', 18, Qt::Font::Bold))

    connect(restart, SIGNAL('clicked()'), self, SLOT('newGame()'))

    @hits = Qt::LCDNumber.new(2)
    @hits.setSegmentStyle(Qt::LCDNumber::Filled)
    @shotsLeft = Qt::LCDNumber.new(2)
    @shotsLeft.setSegmentStyle(Qt::LCDNumber::Filled)
    hitsLabel = Qt::Label.new(tr('HITS'))
    shotsLeftLabel = Qt::Label.new(tr('SHOTS LEFT'))
    
    Qt::Shortcut.new(Qt::KeySequence.new(Qt::Key_Enter.to_i),
                     self, SLOT('fire()'))
    Qt::Shortcut.new(Qt::KeySequence.new(Qt::Key_Return.to_i),
                     self, SLOT('fire()'))
    Qt::Shortcut.new(Qt::KeySequence.new(Qt::CTRL.to_i + Qt::Key_Q.to_i),
                     self, SLOT('close()'))
    
    topLayout = Qt::HBoxLayout.new()
    topLayout.addWidget(shoot)
    topLayout.addWidget(@hits)
    topLayout.addWidget(hitsLabel)
    topLayout.addWidget(@shotsLeft)
    topLayout.addWidget(shotsLeftLabel)
    topLayout.addStretch(1)
    topLayout.addWidget(restart)

    leftLayout = Qt::VBoxLayout.new()
    leftLayout.addWidget(angle)
    leftLayout.addWidget(force)

    gridLayout = Qt::GridLayout.new()
    gridLayout.addWidget(quit, 0, 0)
    gridLayout.addLayout(topLayout, 0, 1)
    gridLayout.addLayout(leftLayout, 1, 0)
    gridLayout.addWidget(@cannonField, 1, 1, 2, 1)
    gridLayout.setColumnStretch(1, 10)
    setLayout(gridLayout)

    angle.setValue(60)
    force.setValue(25)
    angle.setFocus()
    
    newGame()
  end
  
  def fire()
    if @cannonField.gameOver() || @cannonField.isShooting()
      return
    end

    @shotsLeft.display(@shotsLeft.intValue() - 1)
    @cannonField.shoot()
  end

  def hit()
    @hits.display(@hits.intValue() + 1)

    if @shotsLeft.intValue() == 0
      @cannonField.setGameOver()
    else
      @cannonField.newTarget()
    end
  end

  def missed()
    if @shotsLeft.intValue() == 0
      @cannonField.setGameOver()
    end
  end

  def newGame()
    @shotsLeft.display(15)
    @hits.display(0)
    @cannonField.restartGame()
    @cannonField.newTarget()
  end
end