from datetime import datetime

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

from app.database import Base


class AgentCommand(Base):
    __tablename__ = "agent_commands"

    id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
    command_uuid: Mapped[str] = mapped_column(String(36), unique=True, index=True)
    host_id: Mapped[int] = mapped_column(ForeignKey("hosts.id", ondelete="CASCADE"), index=True)
    event_id: Mapped[int | None] = mapped_column(ForeignKey("events.id", ondelete="SET NULL"), nullable=True)
    command_type: Mapped[str] = mapped_column(String(32))
    params: Mapped[dict | None] = mapped_column(JSONB, default=dict)
    status: Mapped[str] = mapped_column(String(16), default="pending", index=True)
    result_stdout: Mapped[str | None] = mapped_column(Text)
    result_stderr: Mapped[str | None] = mapped_column(Text)
    requested_by: Mapped[str | None] = mapped_column(String(128))
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
    completed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))

    host: Mapped["Host"] = relationship(back_populates="agent_commands")
    event: Mapped["Event | None"] = relationship()