import uuid
from datetime import datetime
from sqlalchemy import String, Text, DateTime, Integer, func
from sqlalchemy.orm import Mapped, mapped_column
from sqlalchemy.dialects.postgresql import UUID
from ..database import Base


class Session(Base):
    __tablename__ = "sessions"

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    name: Mapped[str] = mapped_column(String(255))
    description: Mapped[str | None] = mapped_column(Text, nullable=True)
    candidate_count: Mapped[int] = mapped_column(Integer, default=0)
    status: Mapped[str] = mapped_column(String(32), default="active")
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
    updated_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())