from sqlalchemy import (
    Boolean,
    Column,
    DateTime,
    ForeignKey,
    Integer,
    String,
    Text,
)
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func

from app.core.database import Base


class Task(Base):
    __tablename__ = "tasks"

    id = Column(Integer, primary_key=True, index=True)
    title = Column(String, index=True, nullable=False)
    description = Column(Text, nullable=True)
    is_completed = Column(Boolean, default=False)
    due_date = Column(DateTime(timezone=True), nullable=True)
    priority = Column(String, default="medium")  # low, medium, high
    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)
    category_id = Column(Integer, ForeignKey("categories.id"), nullable=True)

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