"""Syslog: telling phrases counted per source into the metric store (#6001)

Revision ID: syslog_002_patterns
Revises: syslog_001_sources_lines
Create Date: 2026-10-19
"""
from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op

revision: str = "syslog_002_patterns"
down_revision: Union[str, None] = "syslog_001_sources_lines"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "syslog_patterns",
        sa.Column("id", sa.String(36), primary_key=True),
        sa.Column("key", sa.String(48), nullable=False, unique=True),
        sa.Column("name", sa.String(100), nullable=False),
        sa.Column("phrases", sa.JSON, nullable=False),
        sa.Column("max_severity", sa.SmallInteger, nullable=True),
        sa.Column("source_id", sa.String(36),
                  sa.ForeignKey("syslog_sources.id", ondelete="CASCADE"), nullable=True),
        sa.Column("window_minutes", sa.SmallInteger, nullable=False, server_default="15"),
        sa.Column("enabled", sa.Boolean, nullable=False, server_default=sa.true()),
        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
    )


def downgrade() -> None:
    op.drop_table("syslog_patterns")