from sqlalchemy import Column, Integer, String, DateTime
from sqlalchemy.sql import func
from sqlalchemy.orm import relationship

from app.db.base import Base


class Category(Base):
    __tablename__ = "categories"

    id = Column(Integer, primary_key=True, index=True)
    name = Column(String(100), nullable=False, unique=True)
    description = Column(String(500), nullable=True)
    color = Column(String(7), nullable=True)  # Hex color code like #FF0000
    created_at = Column(DateTime(timezone=True), server_default=func.now())
    updated_at = Column(DateTime(timezone=True), onupdate=func.now())

    # Relationship to todos
    todos = relationship("Todo", back_populates="category")