"""TaskResult: l'esito registrato da un task 'check' (OK/NOK) o 'note' (#54 #55)."""
from datetime import datetime
from typing import Optional

from sqlalchemy import DateTime, Enum, ForeignKey, Integer, JSON, Text, func
from sqlalchemy.orm import Mapped, mapped_column

from src.backend.database import Base

TASK_OUTCOMES = ("ok", "nok", "done")


class TaskResult(Base):
    __tablename__ = "task_results"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    task_id: Mapped[int] = mapped_column(
        Integer, ForeignKey("recipe_tasks.id", ondelete="CASCADE"),
        nullable=False, index=True,
    )
    # Copiata dal task: la versione in cui l'esito e' stato dato non cambia piu'.
    version_id: Mapped[int] = mapped_column(
        Integer, ForeignKey("recipe_versions.id"), nullable=False, index=True
    )
    production_run_id: Mapped[Optional[int]] = mapped_column(
        Integer, ForeignKey("production_runs.id", ondelete="SET NULL"),
        nullable=True, index=True,
    )
    user_id: Mapped[int] = mapped_column(
        Integer, ForeignKey("users.id"), nullable=False
    )
    outcome: Mapped[str] = mapped_column(
        Enum(*TASK_OUTCOMES, name="task_outcome_enum"), nullable=False
    )
    note: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
    # {chiave del campo: valore stringa}; allegati: [{key, path, name}]
    values: Mapped[Optional[dict]] = mapped_column(JSON, nullable=True)
    attachments: Mapped[Optional[list]] = mapped_column(JSON, nullable=True)
    created_at: Mapped[datetime] = mapped_column(
        DateTime, nullable=False, server_default=func.now()
    )

    __table_args__ = ({"mysql_engine": "InnoDB", "mysql_charset": "utf8mb4"},)

    def __repr__(self) -> str:
        return f"<TaskResult task={self.task_id} outcome={self.outcome}>"