from datetime import datetime

from sqlalchemy import String, DateTime, ForeignKey, func
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.database import Base


class Table(Base):
    __tablename__ = "tables"

    id: Mapped[int] = mapped_column(primary_key=True)
    workspace_id: Mapped[int] = mapped_column(
        ForeignKey("workspaces.id", ondelete="CASCADE"), nullable=False, index=True
    )
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    description: Mapped[str] = mapped_column(String, nullable=True)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=func.now())
    updated_at: Mapped[datetime] = mapped_column(
        DateTime, default=func.now(), onupdate=func.now()
    )

    # Relationships
    workspace = relationship("Workspace", back_populates="tables")
    columns = relationship(
        "Column",
        back_populates="table",
        cascade="all, delete-orphan",
        order_by="Column.position",
    )
    records = relationship(
        "Record", back_populates="table", cascade="all, delete-orphan"
    )
    views = relationship("View", back_populates="table", cascade="all, delete-orphan")

    def __repr__(self):
        return f"<Table(id={self.id}, name={self.name})>"