""" Generate preview images """
import sys

from django.core.management.base import BaseCommand

from bookwyrm import activitystreams, models, settings, preview_images


class Command(BaseCommand):
    help = "Generate preview images"

    def add_arguments(self, parser):
        parser.add_argument('--all', '-a', action="store_true", help="Generates images for ALL types: site, users and books. Can use a lot of computing power.")

    # pylint: disable=no-self-use,unused-argument
    def handle(self, *args, **options):
        """generate preview images"""
        self.stdout.write("   | Hello! I will be generating preview images for your instance.")
        if options['all']:
            self.stdout.write(
                "🧑‍🎨 ⎨ This might take quite long if your instance has a lot of books and users."
            )
            self.stdout.write("   | ✧ Thank you for your patience ✧")
        else:
            self.stdout.write(
                "🧑‍🎨 ⎨ I will only generate the instance preview image."
            )            
            self.stdout.write("   | ✧ Be right back! ✧")

        # Site
        self.stdout.write("   → Site preview image: ", ending='')
        preview_images.generate_site_preview_image_task.delay()
        self.stdout.write(" OK 🖼")

        if options['all']:
            # Users
            users = models.User.objects.filter(
                local=True,
                is_active=True,
            )
            self.stdout.write("   → User preview images ({}): ".format(len(users)), ending='')
            for user in users:
                preview_images.generate_user_preview_image_task.delay(user.id)
                self.stdout.write(".", ending='')
            self.stdout.write(" OK 🖼")

            # Books
            books = models.Book.objects.select_subclasses().filter()
            self.stdout.write("   → Book preview images ({}): ".format(len(books)), ending='')
            for book in books:
                preview_images.generate_edition_preview_image_task.delay(book.id)
                self.stdout.write(".", ending='')
            self.stdout.write(" OK 🖼")

        self.stdout.write("🧑‍🎨 ⎨ I’m all done! ✧ Enjoy ✧")