from rest_framework_simplejwt.tokens import RefreshToken

ALLOWED_ROLE_TYPES = ('student', 'doctor', 'teacher')


def get_tokens_for_user(user):
    refresh = RefreshToken.for_user(user)
    return {'access': str(refresh.access_token), 'refresh': str(refresh)}


def build_user_response(user):
    return {
        'id': user.id,
        'username': user.username,
        'phone': user.phone,
        'real_name': user.real_name,
        'role_type': user.role_type,
        'institution': user.institution.name if user.institution_id else None,
        'department': user.department.name if user.department_id else None,
    }


def get_client_ip(request):
    xff = request.META.get('HTTP_X_FORWARDED_FOR')
    if xff:
        return xff.split(',')[0].strip()
    return request.META.get('REMOTE_ADDR')


def get_user_agent(request):
    return request.META.get('HTTP_USER_AGENT', '')