"""
Cardset model - Pure data model for card set metadata.

Migrated from Discord app with no business logic extraction needed.
Contains only field definitions and relationships.
"""

from sqlmodel import SQLModel, Field, Relationship
from sqlalchemy import Column, BigInteger
from typing import List, TYPE_CHECKING
from pydantic import field_validator

if TYPE_CHECKING:
    # from .game_cardset_link import GameCardsetLink  # Will be uncommented when GameCardsetLink model is created
    from .player import Player


class CardsetBase(SQLModel):
    """Base model for Cardset metadata."""

    id: int | None = Field(default=None, sa_column=Column(BigInteger(), primary_key=True, autoincrement=False))
    name: str = Field(index=True, description="Name of the card set")
    ranked_legal: bool = Field(default=False, description="Whether this cardset is legal for ranked play")

    @field_validator('name')
    @classmethod
    def validate_name_not_empty(cls, v: str) -> str:
        """Validate that name is not empty."""
        if not v or not v.strip():
            raise ValueError("Name cannot be empty")
        return v


class Cardset(CardsetBase, table=True):
    """Cardset model for card set metadata storage."""

    # game_links: List["GameCardsetLink"] = Relationship(back_populates="cardset", cascade_delete=True)  # Will be uncommented when GameCardsetLink model is created
    players: List["Player"] = Relationship(back_populates="cardset")