from __future__ import annotations

from datetime import datetime
from typing import Optional

from sqlalchemy import DateTime, ForeignKey, String, Text, JSON, text
from sqlalchemy.orm import Mapped, mapped_column, relationship
from sqlalchemy.sql import func

from .database import Base


class Task(Base):
    __tablename__ = "tasks"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    action: Mapped[str] = mapped_column(String, nullable=False)
    target: Mapped[str] = mapped_column(String, nullable=False)
    status: Mapped[str] = mapped_column(String, nullable=False, server_default=text("'pending'"))
    playbook: Mapped[Optional[str]] = mapped_column(String)
    started_at: Mapped[Optional[datetime]] = mapped_column(DateTime(timezone=True))
    completed_at: Mapped[Optional[datetime]] = mapped_column(DateTime(timezone=True))
    error_message: Mapped[Optional[str]] = mapped_column(Text)
    result_data: Mapped[Optional[dict]] = mapped_column(JSON)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, server_default=func.now())

    schedule_runs: Mapped[list["ScheduleRun"]] = relationship("ScheduleRun", back_populates="task")
    logs: Mapped[list["Log"]] = relationship("Log", back_populates="task")

    def __repr__(self) -> str:  # pragma: no cover - debug helper
        return f"<Task id={self.id} action={self.action} target={self.target} status={self.status}>"