"""add log_events — stored log events for diagnostics (E22 S3)

Revision ID: 0086_log_events
Revises: 0085_users_last_login_at
Create Date: 2026-09-17

Written by app/logsink.py's background writer (WARNING and above, request lines), pruned by the log_gc
job after `log_retention_days`. Sized against prod on 2026-09-16: ~2k rows on a normal day, ~14k on a
YouTube-RSS-outage day before flood control — a few MB over the 7-day window. `user_id` carries no
foreign key on purpose (see models.LogEvent).
"""

import sqlalchemy as sa
from alembic import op
from sqlalchemy.dialects import postgresql

revision: str = "0086_log_events"
down_revision: str | None = "0085_users_last_login_at"
branch_labels: str | None = None
depends_on: str | None = None


def upgrade() -> None:
    op.create_table(
        "log_events",
        sa.Column("id", sa.BigInteger(), primary_key=True),
        sa.Column("ts", sa.DateTime(timezone=True), nullable=False),
        sa.Column("level", sa.String(10), nullable=False),
        sa.Column("sev", sa.SmallInteger(), nullable=False),
        sa.Column("source", sa.String(16), nullable=False),
        sa.Column("logger", sa.String(128), nullable=False),
        sa.Column("event", sa.String(64), nullable=True),
        sa.Column("msg", sa.Text(), nullable=False),
        sa.Column("attrs", postgresql.JSONB(), nullable=True),
        sa.Column("exc", sa.Text(), nullable=True),
        sa.Column("request_id", sa.String(64), nullable=True),
        sa.Column("user_id", sa.Integer(), nullable=True),
        sa.Column("debug_session_id", sa.String(64), nullable=True),
        sa.Column("job_id", sa.Integer(), nullable=True),
        sa.Column("version", sa.String(64), nullable=True),
    )
    op.create_index("ix_log_events_ts", "log_events", ["ts"])
    op.create_index("ix_log_events_request_id", "log_events", ["request_id"])
    op.create_index("ix_log_events_user_ts", "log_events", ["user_id", "ts"])


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