Ticket System

class AbstractTicket(CremeEntity):
    """
    Abstract base class for support tickets.

    Fields:
    - number: Unique ticket number (TicketNumber)
    - title: Ticket title/summary
    - description: Detailed ticket description
    - status: Current ticket status (Status)
    - priority: Ticket priority level (Priority)
    - criticity: Ticket criticality level (Criticity)
    - solution: Solution/resolution description
    """

class Ticket(AbstractTicket):
    """Default concrete ticket model."""

def get_ticket_model():
    """Returns the active Ticket model for this project."""

def ticket_model_is_custom() -> bool:
    """Returns True if custom Ticket model is configured."""

class AbstractTicketTemplate(CremeEntity):
    """
    Abstract base class for ticket templates.

    Fields:
    - title: Template title
    - description: Template description content
    - status: Default status for tickets created from template
    - priority: Default priority level
    - criticity: Default criticality level
    """

class TicketTemplate(AbstractTicketTemplate):
    """Default concrete ticket template model."""

def get_tickettemplate_model():
    """Returns the active TicketTemplate model for this project."""

def tickettemplate_model_is_custom() -> bool:
    """Returns True if custom TicketTemplate model is configured."""

class Priority(CremeModel):
    """Ticket priority levels (Low, Normal, High, etc.)."""

class Status(CremeModel):
    """Ticket status options (Open, In Progress, Closed, etc.)."""

class Criticity(CremeModel):
    """Ticket criticality levels (Minor, Major, Critical, etc.)."""

class TicketNumber(CremeModel):
    """Auto-generated unique ticket numbering system."""

from creme.tickets import get_ticket_model, get_tickettemplate_model
from creme.tickets.models import Ticket, TicketTemplate, Priority, Status, Criticity

# Ticket model settings
TICKETS_TICKET_MODEL = 'tickets.Ticket'  # Default ticket model
TICKETS_TEMPLATE_MODEL = 'tickets.TicketTemplate'  # Default template model
TICKETS_TICKET_FORCE_NOT_CUSTOM = False
TICKETS_TEMPLATE_FORCE_NOT_CUSTOM = False