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

  def change do
    create table(:propagation_run_timings, primary_key: false) do
      add :id, :binary_id, primary_key: true

      # `run_time` is the HRRR model cycle the chain is rolling through,
      # `forecast_hour` ∈ 0..18 picks the step within that chain.
      # (run_time, forecast_hour) is the natural key.
      add :run_time, :utc_datetime, null: false
      add :forecast_hour, :integer, null: false
      add :valid_time, :utc_datetime, null: false

      # Wall-clock window of this forecast hour's work, plus the total
      # in ms so queries don't have to recompute it.
      add :started_at, :utc_datetime_usec, null: false
      add :finished_at, :utc_datetime_usec, null: false
      add :duration_ms, :integer, null: false

      # "ok" when replace_scores returned {:ok, _}, "failed" otherwise.
      # `error` carries the inspected reason on failure, nil on success.
      add :status, :string, null: false
      add :error, :text

      timestamps(type: :utc_datetime, updated_at: false)
    end

    create unique_index(:propagation_run_timings, [:run_time, :forecast_hour])
    create index(:propagation_run_timings, [:started_at])
  end
end