"""fc3d: scheduling + source health columns

Revision ID: 0014
Revises: 0013
Create Date: 2026-05-21

Additive only. source.consecutive_failures (default 0, DownloadService
finalize hook owns the writes). import_settings gains the three
scheduling knobs (global default interval, event retention, failure
warning threshold).
"""
from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op

revision: str = "0014"
down_revision: Union[str, None] = "0013"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.add_column(
        "source",
        sa.Column(
            "consecutive_failures", sa.Integer(),
            nullable=False, server_default="0",
        ),
    )
    op.add_column(
        "import_settings",
        sa.Column(
            "download_schedule_default_seconds", sa.Integer(),
            nullable=False, server_default="28800",
        ),
    )
    op.add_column(
        "import_settings",
        sa.Column(
            "download_event_retention_days", sa.Integer(),
            nullable=False, server_default="90",
        ),
    )
    op.add_column(
        "import_settings",
        sa.Column(
            "download_failure_warning_threshold", sa.Integer(),
            nullable=False, server_default="5",
        ),
    )


def downgrade() -> None:
    op.drop_column("import_settings", "download_failure_warning_threshold")
    op.drop_column("import_settings", "download_event_retention_days")
    op.drop_column("import_settings", "download_schedule_default_seconds")
    op.drop_column("source", "consecutive_failures")
