# Standard library imports.
from pathlib import Path

# External library imports.
import filetype

# Django imports.
from django.http      import HttpResponseNotFound
from django.conf      import settings
from django.shortcuts import (render,
                              redirect)

# Project imports.
from .utils import make_thumbnail

###########################################################################################
# View functions.                                                                         #
###########################################################################################

def gallery_view(request, path = None):
    """
    Shows a list of subdirectories and image files inside the given path.
    The path should be inside the GALLERY_ROOT path, otherwise a 404 error will be thrown.
    """

    full_path = settings.GALLERY_ROOT.joinpath(path) if path is not None else settings.GALLERY_ROOT

    if full_path.exists():
        if full_path.is_dir():
            subdirs        = sorted([i for i in full_path.iterdir() if i.is_dir()])
            images         = sorted([i for i in full_path.iterdir() if i.is_file() and filetype.is_image(str(i))])
            display_images = []

            for image in images:
                make_thumbnail(image)

                img_context = {
                    'path': image.name,
                    'name': image.name,
                    'thumbnail': '/thumbs/' + path + '/' + image.name if path is not None else '/thumbs/' + image.name
                } 

                display_images.append(img_context)

            context = {
                'path':    path,
                'subdirs': subdirs,
                'images':  display_images
            }

            return render(request, 'gallery_view.html', context)

        else:
            return render(request, 'image_view.html', {'image_path': Path('/imgs/').joinpath(path)})

    else:
        return HttpResponseNotFound('Not found')