from datetime import datetime

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

from app.database import Base


class Comment(Base):
    __tablename__ = "comments"

    id: Mapped[int] = mapped_column(primary_key=True)
    record_id: Mapped[int] = mapped_column(
        ForeignKey("records.id", ondelete="CASCADE"), nullable=False, index=True
    )
    user_id: Mapped[int] = mapped_column(ForeignKey("users.id"), nullable=True)
    content: Mapped[str] = mapped_column(String, nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=func.now())
    updated_at: Mapped[datetime] = mapped_column(
        DateTime, default=func.now(), onupdate=func.now()
    )

    # Relationships
    record = relationship("Record", back_populates="comments")
    user = relationship("User", back_populates="comments")

    __table_args__ = (Index("idx_comments_record", "record_id"),)

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