import os

from django.conf import settings
from django.core.management import call_command
from django.core.management.base import BaseCommand
from wagtail.core.models import Page, Site


class Command(BaseCommand):

    def add_arguments(self, parser):
        parser.add_argument('filename')

    def handle(self, **options):
        fixtures_dir = os.path.join(
            settings.BASE_DIR,
            'django_airavata',
            'wagtailapps',
            'base',
            'fixtures')
        # options['filename'] may or may not contain the .json extension
        fixture_file = os.path.join(fixtures_dir, options['filename'])
        if not os.path.exists(fixture_file):
            fixture_file = os.path.join(
                fixtures_dir, f"{options['filename']}.json")

        # Wagtail creates default Site and Page instances during install, but we already have
        # them in the data load. Remove the auto-generated ones.
        if Site.objects.filter(hostname='localhost').exists():
            Site.objects.get(hostname='localhost').delete()
        if Page.objects.filter(
                title='Welcome to your new Wagtail site!').exists():
            Page.objects.get(
                title='Welcome to your new Wagtail site!').delete()

        call_command('loaddata', fixture_file, verbosity=0)
        call_command('set_wagtail_site')
        call_command('fix_page_revision_content_type')

        self.stdout.write(
            self.style.SUCCESS(f"{options['filename']} is loaded successfully....!")
        )