from datetime import datetime

from sqlalchemy import DateTime, ForeignKey, String, Text, UniqueConstraint, func
from sqlalchemy.dialects.postgresql import JSONB
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.database import Base


class Event(Base):
    __tablename__ = "events"
    __table_args__ = (UniqueConstraint("event_id", name="uq_events_event_id"),)

    id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
    event_id: Mapped[str] = mapped_column(String(36), index=True)
    host_id: Mapped[int] = mapped_column(ForeignKey("hosts.id"), index=True)
    occurred_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), index=True)
    received_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
    category: Mapped[str] = mapped_column(String(64), index=True)
    type: Mapped[str] = mapped_column(String(128), index=True)
    severity: Mapped[str] = mapped_column(String(16), index=True)
    title: Mapped[str] = mapped_column(String(256))
    summary: Mapped[str] = mapped_column(Text)
    details: Mapped[dict | None] = mapped_column(JSONB)
    raw: Mapped[dict | None] = mapped_column(JSONB)
    dedup_key: Mapped[str | None] = mapped_column(String(512), index=True)
    correlation_id: Mapped[str | None] = mapped_column(String(36))
    payload: Mapped[dict] = mapped_column(JSONB)

    host: Mapped["Host"] = relationship(back_populates="events")