# Needed on case-insensitive filesystems
from __future__ import absolute_import

# Try to import PIL in either of the two ways it can be installed.
try:
    from PIL import Image, ImageDraw
except ImportError:  # pragma: no cover
    import Image
    import ImageDraw

import qrcode.image.base


class PilImage(qrcode.image.base.BaseImage):
    """
    PIL image builder, default format is PNG.
    """
    kind = "PNG"

    def new_image(self, **kwargs):
        back_color = kwargs.get("back_color", "white")
        fill_color = kwargs.get("fill_color", "black")

        if fill_color.lower() != "black" or back_color.lower() != "white":
            if back_color.lower() == "transparent":
                mode = "RGBA"
                back_color = None
            else:
                mode = "RGB"
        else:
            mode = "1"
            # L mode (1 mode) color = (r*299 + g*587 + b*114)//1000
            if fill_color.lower() == "black": fill_color = 0
            if back_color.lower() == "white": back_color = 255

        img = Image.new(mode, (self.pixel_size, self.pixel_size), back_color)
        self.fill_color = fill_color
        self._idr = ImageDraw.Draw(img)
        return img

    def drawrect(self, row, col):
        box = self.pixel_box(row, col)
        self._idr.rectangle(box, fill=self.fill_color)

    def save(self, stream, format=None, **kwargs):
        kind = kwargs.pop("kind", self.kind)
        if format is None:
            format = kind
        self._img.save(stream, format=format, **kwargs)

    def __getattr__(self, name):
        return getattr(self._img, name)
