#==============================================================================
# ■ Window Resize Toggle (F5) - Auto-Center + Size Filtering
#------------------------------------------------------------------------------
# Cycles through safe window sizes, skipping any that would exceed the screen.
# Auto-centers the window and nudges it upward to avoid overlapping the taskbar.
#==============================================================================

module WindowScaler
  # Define fixed window sizes [width, height]
  SIZES = [
    [544, 416],     # 1.0x native
    [816, 624],     # 1.5x
    [1088, 832],    # 2.0x
    [1343, 1027],   # 2.3x
    [1632, 1248],   # 3.0x
    [1819, 1391],   # ~3.4x
  ]

  TASKBAR_OFFSET = 20  # Move window upward to avoid taskbar
end

class << Graphics
  alias resize_update update
  def update
    resize_update
    WindowResize.update
  end
end

module WindowResize
  @index = 0

  def self.update
    if Input.trigger?(:F5)
      screen_width  = Win32API.new('user32', 'GetSystemMetrics', ['I'], 'I').call(0)
      screen_height = Win32API.new('user32', 'GetSystemMetrics', ['I'], 'I').call(1)

      # Try all sizes once, skipping any that are too large
      tried = 0
      while tried < WindowScaler::SIZES.size
        @index = (@index + 1) % WindowScaler::SIZES.size
        width, height = WindowScaler::SIZES[@index]
        if width <= screen_width && height <= screen_height
          apply_size(width, height, screen_width, screen_height)
          break
        end
        tried += 1
      end
    end
  end

  def self.apply_size(width, height, screen_width, screen_height)
    # Center the window with vertical offset to avoid taskbar
    x = [(screen_width - width) / 2, 0].max
    y = [(screen_height - height) / 2 - WindowScaler::TASKBAR_OFFSET, 0].max

    hwnd = Win32API.new('user32', 'FindWindowA', ['P', 'P'], 'L').call("RGSS Player", nil)
    move_window = Win32API.new('user32', 'MoveWindow', %w(L L L L L L), 'L')
    move_window.call(hwnd, x, y, width, height, 1)
  end
end