import json

from django.conf import settings
from django.core.management.base import BaseCommand
from django_redis import get_redis_connection


class Command(BaseCommand):
    help = "List active Django sessions from Redis"

    def add_arguments(self, parser):
        parser.add_argument('--details', action='store_true', help='Print session data')

    def handle(self, *args, **options):
        cache_prefix = getattr(settings, 'SESSION_CACHE_ALIAS', 'default')
        redis_conn = get_redis_connection(cache_prefix)

        # Redis-avaimet istuntoja varten (django-redis käyttää 'session:' prefixiä)
        keys = redis_conn.keys('session:*')
        count = len(keys)

        self.stdout.write(f"Aktiivisia sessioita Redisissä: {count}")

        if options['details'] and count > 0:
            self.stdout.write("\nSession ID:t ja sisällöt:\n" + "-"*40)
            for key in keys:
                session_data = redis_conn.get(key)
                try:
                    decoded = session_data.decode("utf-8")
                except Exception:
                    decoded = str(session_data)

                self.stdout.write(f"{key.decode('utf-8')}: {decoded}\n")