require 'constraint'

class Rectangle
    attr_reader :top_left, :top_right, :bottom_right, :bottom_left
    
    def initialize top_left, bottom_right
        @top_left = top_left
        @bottom_right = bottom_right
        @top_right = Point.new(bottom_right.x, top_left.y)
        @bottom_left = Point.new(top_left.x, bottom_right.y)
        
        Constraint.new [top_left, top_right], &Constraint::SAME_Y
        Constraint.new [bottom_left, bottom_right], &Constraint::SAME_Y
        Constraint.new [top_left, bottom_left], &Constraint::SAME_X
        Constraint.new [top_right, bottom_right], &Constraint::SAME_X
    end
    
    def width
        top_right.x - top_left.x
    end
    
    def height
        bottom_left.y - top_left.y
    end
    
    def area
        width * height
    end
end