from enum import Enum

class Transformation(object):
    def __init__(self):
        self.mirror_x = 0
    
        self.absolute_rotation = 0
        self.absolute_magnification = 0

        self.zoom = 1
        self.rotation = 0

class Element(object):
    def __init__(self):
        self.elflags = 0
        self.plex    = 0
        
class Drawable(object):
    def __init__(self):
        self.layer   = 0
        self.datatype = 0

class Boundary(Element, Drawable):
    def __init__(self):
        self.points = []
    
class Path(Element, Drawable):
    class Styles(Enum):
        SQUARE_ENDS  = 0
        ROUNDED_ENDS = 1
        OFFSET_ENDS  = 2
        CUSTOM_END   = 4
    
    def __init__(self):
        self.extendEnd = [0,0] # extend past start and end    
        self.width     = 0
        self.pathStyle = Path.Styles.SQUARE_ENDS
    
        self.points = []

class Text(Element, Drawable):
    class VJust(Enum):
        Top    = 0
        Middle = 1
        Bottom = 2

    class HJust(Enum):
        Left   = 0
        Center = 1
        Right  = 2

    def __init__(self):
        # text info
        self.string = ""
        self.position = (0,0)
        
        # presentation
        self.fontnumber               = 0
        self.verticalJustification    = Text.VJust.Top
        self.horizontalJustification  = Text.HJust.Left

        # optional path info
        self.pathStype = Path.Styles.SQUARE_ENDS
        self.pathWidth = 0

        self.transformation = Transformation()

    
class Box(Element, Drawable):
    def __init__(self):
        self.points = []

class SRef(Element):
    """
    A Structure Reference defines a single instance of a different structure in 
    the structure we call parent here
    """
    def __init__(self):
        self.position = (0,0)
        self.structure = ""
        
        self.transformation  = Transformation()

        self.parent = None

class ARef(SRef):
    """
    An Array Reference is similar to the SRef, but it defines the instances in a grid
    with size instances spaces evenly between the bound coordinates

    with:

    v1 = bounds[0] - position
    v2 = bounds[1] - position
    i  = xth instance index
    j  = yth instance index

    this will result in an array like this:
        j\i | 0               |  1                        | ... | size[0]
        ----+-----------------+---------------------------+-----+--------------------
        0   | (position)      |  (position + v1)          | ... | (bounds[0])
        1   | (position + v2) |  (position + v1*i + v2*j) | ... | (bounds[0] + v2)
      ...   | ...             |  ...                      | ... | ...
    size[1] | (bounds[2])     |  (bounds[2] + v1)         | ... | (bounds[0] + bounds[1])

    """
    def __init__(self):
        super(ARef, self).__init__()

        # positions of last instance in X and Y direction
        self.bounds = [(0,0), (0,0)]
        # number of instances in X and Y direction
        self.size   = (0,0)