from DesignEntity import DesignEntity
from PIL import ImageFont, ImageDraw, ImageOps
from Assets import path

class TextDesign (DesignEntity):
    """Object that manages all information relevant to text
    and prints it to an image"""
    def __init__ (self, size, font = "Assistant-Regular.ttf", fontsize = 12, text = "", horizontalalignment = "left", verticalalignment = "top"):
        super(TextDesign, self).__init__(size)
        self.font_family = font
        self.font_size = fontsize
        self.text = text
        self.horizontal_alignment = horizontalalignment
        self.vertical_alignment = verticalalignment
        self.is_bitmap = True

    def __finish_image__ (self):
        self.__init_image__()
        self.__font__ = ImageFont.truetype(path + self.font_family, self.font_size)
        pos = self.__pos_from_alignment__()
        ImageDraw.Draw(self.__image__).text(pos, self.text, fill=0, font=self.__font__)
        self.__image__ = ImageOps.invert(self.__image__)

    def __pos_from_alignment__ (self):
        width, height = self.__font__.getsize(self.text)
        x, y = 0, 0
        
        if self.vertical_alignment == "center":
            y = int((self.size[1] / 2) - (height / 2))
        elif self.vertical_alignment == "bottom":
            y = int(self.size[1] - height)

        if self.horizontal_alignment == "center":
            x = int((self.size[0] / 2) - (width / 2))
        elif self.vertical_alignment == "right":
            x = int(self.size[0] - width)

        return (x, y)