"""Syslog: the devices that send it, and the lines kept from those added

A sender is a row whether or not it has been added: one not yet added is
counted and offered, never stored (milestone 532, #5999).

Revision ID: syslog_001_sources_lines
Revises: (none — a branch off core via depends_on)
Create Date: 2026-10-19
"""
from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op

revision: str = "syslog_001_sources_lines"
down_revision: Union[str, None] = None
branch_labels: Union[str, Sequence[str], None] = "syslog"
depends_on: Union[str, Sequence[str], None] = ("0004_app_settings",)


def upgrade() -> None:
    op.create_table(
        "syslog_sources",
        sa.Column("id", sa.String(36), primary_key=True),
        sa.Column("address", sa.String(64), nullable=False, unique=True),
        sa.Column("state", sa.String(10), nullable=False, server_default="offered"),
        sa.Column("name", sa.String(100), nullable=False, server_default=""),
        sa.Column("host_id", sa.String(36), sa.ForeignKey("hosts.id", ondelete="SET NULL"),
                  nullable=True),
        sa.Column("hostname_seen", sa.String(255), nullable=False, server_default=""),
        sa.Column("first_seen_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("last_seen_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("lines_total", sa.BigInteger, nullable=False, server_default="0"),
        sa.Column("last_severity", sa.SmallInteger, nullable=True),
        sa.Column("last_line", sa.Text, nullable=False, server_default=""),
    )
    op.create_table(
        "syslog_lines",
        sa.Column("id", sa.String(36), primary_key=True),
        sa.Column("source_id", sa.String(36),
                  sa.ForeignKey("syslog_sources.id", ondelete="CASCADE"), nullable=False),
        sa.Column("received_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("sent_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("facility", sa.SmallInteger, nullable=False),
        sa.Column("severity", sa.SmallInteger, nullable=False),
        sa.Column("hostname", sa.String(255), nullable=False, server_default=""),
        sa.Column("app", sa.String(128), nullable=False, server_default=""),
        sa.Column("message", sa.Text, nullable=False, server_default=""),
    )
    op.create_index("ix_syslog_lines_source_time", "syslog_lines", ["source_id", "received_at"])
    op.create_index("ix_syslog_lines_received", "syslog_lines", ["received_at"])


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