"""``AutomationRun`` table — the immutable per-fire execution record."""

from __future__ import annotations

from sqlalchemy import (
    TIMESTAMP,
    Column,
    Enum as SQLAlchemyEnum,
    ForeignKey,
    Integer,
    String,
)
from sqlalchemy.dialects.postgresql import JSONB

from app.db import BaseModel, TimestampMixin

from ..enums.run_status import RunStatus


class AutomationRun(BaseModel, TimestampMixin):
    """One execution of an automation.

    Every fire of any trigger inserts exactly one row here. The row is
    immutable from the user's perspective — the executor only updates
    ``status``, ``step_results``, ``output``, ``artifacts``, ``error``,
    ``started_at``, ``finished_at`` as the run progresses; the
    ``definition_snapshot`` is locked at fire time so the user can always
    see exactly what code path executed for any historical run.
    """

    __tablename__ = "automation_runs"

    automation_id = Column(
        Integer,
        ForeignKey("automations.id", ondelete="CASCADE"),
        nullable=False,
        index=True,
    )

    trigger_id = Column(
        Integer,
        ForeignKey("automation_triggers.id", ondelete="SET NULL"),
        nullable=True,
        index=True,
    )

    status = Column(
        SQLAlchemyEnum(RunStatus, name="automation_run_status"),
        nullable=False,
        default=RunStatus.PENDING,
        server_default=RunStatus.PENDING.value,
        index=True,
    )

    definition_snapshot = Column(JSONB, nullable=False)

    trigger_payload = Column(JSONB, nullable=True)

    resolved_inputs = Column(JSONB, nullable=False, server_default="{}")

    step_results = Column(JSONB, nullable=False, server_default="[]")

    output = Column(JSONB, nullable=True)

    artifacts = Column(JSONB, nullable=False, server_default="[]")

    error = Column(JSONB, nullable=True)

    started_at = Column(TIMESTAMP(timezone=True), nullable=True)
    finished_at = Column(TIMESTAMP(timezone=True), nullable=True)

    agent_session_id = Column(String(200), nullable=True)