defmodule Microwaveprop.Repo.Migrations.AddTrainingPerformanceIndexes do
  use Ecto.Migration

  def change do
    # QSO training data queries filter on timestamp + distance + positions
    create_if_not_exists index(:qsos, [:qso_timestamp])
    create_if_not_exists index(:qsos, [:band])
    create_if_not_exists index(:qsos, [:distance_km])

    # Callsign search: trigram index for ILIKE on station1/station2
    execute(
      "CREATE EXTENSION IF NOT EXISTS pg_trgm",
      "SELECT 1"
    )

    execute(
      "CREATE INDEX IF NOT EXISTS qsos_station1_trgm_index ON qsos USING gin (station1 gin_trgm_ops)",
      "DROP INDEX IF EXISTS qsos_station1_trgm_index"
    )

    execute(
      "CREATE INDEX IF NOT EXISTS qsos_station2_trgm_index ON qsos USING gin (station2 gin_trgm_ops)",
      "DROP INDEX IF EXISTS qsos_station2_trgm_index"
    )
  end
end