"""Add performance indexes for hot query paths.

Covers:
- calendar_events range queries scoped by calendar (dashboard, notifications)
- calendar_events starred query (dashboard widget)
- calendar_events parent_event_id (recurring series DELETE)
- user_sessions lookup (auth middleware, every request)
- ntfy_sent purge query (background job, every 60s)

Revision ID: 035
Revises: 034
Create Date: 2026-02-27
"""
from alembic import op

revision = "035"
down_revision = "034"
branch_labels = None
depends_on = None


def upgrade() -> None:
    # Composite index for event range queries scoped by calendar
    op.create_index(
        "ix_calendar_events_calendar_start_end",
        "calendar_events",
        ["calendar_id", "start_datetime", "end_datetime"],
    )

    # Partial index for starred events dashboard query
    op.create_index(
        "ix_calendar_events_calendar_starred",
        "calendar_events",
        ["calendar_id", "is_starred"],
    )

    # FK lookup index for recurring children DELETE
    op.create_index(
        "ix_calendar_events_parent_id",
        "calendar_events",
        ["parent_event_id"],
    )

    # Composite index for session validation (runs on every authenticated request)
    op.create_index(
        "ix_user_sessions_lookup",
        "user_sessions",
        ["user_id", "revoked", "expires_at"],
    )

    # Index for ntfy_sent purge query (DELETE WHERE sent_at < cutoff)
    op.create_index(
        "ix_ntfy_sent_sent_at",
        "ntfy_sent",
        ["sent_at"],
    )


def downgrade() -> None:
    op.drop_index("ix_ntfy_sent_sent_at", table_name="ntfy_sent")
    op.drop_index("ix_user_sessions_lookup", table_name="user_sessions")
    op.drop_index("ix_calendar_events_parent_id", table_name="calendar_events")
    op.drop_index("ix_calendar_events_calendar_starred", table_name="calendar_events")
    op.drop_index("ix_calendar_events_calendar_start_end", table_name="calendar_events")