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from sqlalchemy import Column, Integer, Text

from airflow.models.base import Base
from airflow.utils import timezone
from airflow.utils.sqlalchemy import UtcDateTime


class LogTemplate(Base):
    """Changes to ``log_filename_template`` and ``elasticsearch_id``.

    This table is automatically populated when Airflow starts up, to store the
    config's value if it does not match the last row in the table.
    """

    __tablename__ = "log_template"

    id = Column(Integer, primary_key=True, autoincrement=True)
    filename = Column(Text, nullable=False)
    elasticsearch_id = Column(Text, nullable=False)
    created_at = Column(UtcDateTime, nullable=False, default=timezone.utcnow)

    def __repr__(self) -> str:
        attrs = ", ".join(f"{k}={getattr(self, k)}" for k in ("filename", "elasticsearch_id"))
        return f"LogTemplate({attrs})"
