"""usage events (CR-019, wave 11)

Append-only navigation/session activity, separate from audit_log on purpose —
see the UsageEvent docstring in server/models.py. Retention is indefinite by
decision (docs/waves/decisions-2026-09-17.md); nothing here schedules a purge.

Revision ID: 8e2cb3003f8a
Revises: 1d60a608bb51
Create Date: 2026-09-23 00:00:00.000000
"""
from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision = '8e2cb3003f8a'
down_revision = '1d60a608bb51'
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.create_table('usage_events',
    sa.Column('id', sa.String(length=40), nullable=False),
    sa.Column('at', sa.DateTime(timezone=True), nullable=False),
    sa.Column('username', sa.String(length=200), nullable=False),
    sa.Column('project_id', sa.String(length=40), nullable=True),
    sa.Column('tool', sa.String(length=40), nullable=False),
    sa.Column('event', sa.String(length=40), nullable=False),
    sa.Column('detail', sa.JSON(), nullable=False),
    sa.PrimaryKeyConstraint('id')
    )
    op.create_index(op.f('ix_usage_events_at'), 'usage_events', ['at'], unique=False)
    op.create_index(op.f('ix_usage_events_username'), 'usage_events', ['username'], unique=False)
    op.create_index(op.f('ix_usage_events_project_id'), 'usage_events', ['project_id'], unique=False)
    op.create_index(op.f('ix_usage_events_tool'), 'usage_events', ['tool'], unique=False)
    op.create_index(op.f('ix_usage_events_event'), 'usage_events', ['event'], unique=False)


def downgrade() -> None:
    op.drop_index(op.f('ix_usage_events_event'), table_name='usage_events')
    op.drop_index(op.f('ix_usage_events_tool'), table_name='usage_events')
    op.drop_index(op.f('ix_usage_events_project_id'), table_name='usage_events')
    op.drop_index(op.f('ix_usage_events_username'), table_name='usage_events')
    op.drop_index(op.f('ix_usage_events_at'), table_name='usage_events')
    op.drop_table('usage_events')