"""
Cross-model relationships.

This module defines relationships that reference models from other
model files (e.g., DecklistFile.card_links → DeckCardLink). These
must be defined AFTER all model classes have been imported to avoid
circular import issues.

Import this module LAST in app/models/__init__.py.
"""
from sqlalchemy.orm import relationship
from app.models.models import DecklistFile
from app.models.mirror_models import DeckCardLink


# Add the back-reference from DecklistFile to DeckCardLink.
# This was previously defined dynamically at the bottom of mirror_models.py,
# but that caused circular imports. Now it lives here and is imported last.
DecklistFile.card_links = relationship(
    "DeckCardLink",
    back_populates="deck",
    cascade="all, delete-orphan",
    order_by="DeckCardLink.id"
)