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from glob import glob
from io import BytesIO

from PIL import Image
from PIL.ImageDraw import Draw
from IPython.core import display


def overlay(img="vis_1404051745G13I01.png"):
    overlay = Image.open("fulldisk_1006011745_G13I04_coasts.png")
    overlay = overlay.convert("RGBA")
    datas = overlay.getdata()
    newData = []
    for item in datas:
        if item[0] == 255 and item[1] == 255 and item[2] == 255:
            newData.append((255, 255, 255, 0))
        else:
            newData.append(item)
    overlay.putdata(newData)

    background = Image.open(img)
    background = background.convert("RGBA")
    background.paste(overlay, (0, 0), overlay)
    return background


def html_fig_table(images, ncols=2, nrows=2):
    if ncols * nrows != len(images):
        raise ValueError("ncols x nrows must be equal the number of images!")
        
    unit = ["<th><img src='%s'/></th>"]
    row = ['<tr>\n%s\n</tr>' % '\n'.join(unit*ncols)]

    table = """<table>%s</table>""" % '\n'.join(row*nrows)
    return table % tuple(images)


def display_pil_image(im):
   """Displayhook function for PIL Images, rendered as PNG."""
   b = BytesIO()
   im.save(b, format='png')
   data = b.getvalue()

   ip_img = display.Image(data=data, format='png', embed=True)
   return ip_img._repr_png_()

# Register display func with PNG formatter.
png_formatter = get_ipython().display_formatter.formatters['image/png']
dpi = png_formatter.for_type(Image.Image, display_pil_image)


    

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images = glob('./images/*.png')
for img in images:
    tmp = overlay(img)
    tmp.save('./overlays/' + img.split('.')[0] + '_overlay.png')


    

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import base64
from IPython.display import display, HTML

images = []
for img in glob("./overlays/vis*.png"):
    with open(img, "rb") as f:
        base64_data = base64.b64encode(f.read()).decode("ascii")
        images.append('data:image/png;base64,{0}'.format(base64_data))

table = html_fig_table(images, ncols=2, nrows=2)


    

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display(HTML(table))