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

from app.core.database import Base


class Category(Base):
    __tablename__ = "categories"

    id = Column(Integer, primary_key=True, index=True)
    name = Column(String, nullable=False)
    color = Column(String, default="#FFFFFF")  # Hexadecimal color code
    created_at = Column(DateTime(timezone=True), server_default=func.now())
    updated_at = Column(DateTime(timezone=True), onupdate=func.now())

    # Foreign keys
    owner_id = Column(Integer, ForeignKey("users.id"), nullable=False)

    # Relationships
    owner = relationship("User", back_populates="categories")
    tasks = relationship("Task", back_populates="category")