"""Credit transaction model for tracking credit usage."""

from typing import TYPE_CHECKING

from sqlmodel import Field, Relationship

from app.models.base import BaseModel

if TYPE_CHECKING:
    from app.models.user import User


class CreditTransaction(BaseModel, table=True):
    """Database model for credit transactions."""

    __tablename__ = "credit_transaction"  # pyright: ignore[reportAssignmentType]

    user_id: int = Field(foreign_key="user.id", nullable=False)
    action_type: str = Field(nullable=False)
    # Negative for deductions, positive for additions
    amount: int = Field(nullable=False)
    balance_before: int = Field(nullable=False)
    balance_after: int = Field(nullable=False)
    description: str = Field(nullable=False)
    success: bool = Field(nullable=False, default=True)
    # JSON string for additional data
    metadata_json: str | None = Field(default=None)

    # relationships
    user: "User" = Relationship(back_populates="credit_transactions")