defmodule Mv.Repo.Migrations.AddJoinRequests do
  @moduledoc """
  Adds join_requests table for public join flow (onboarding concept §2.3.2).
  """
  use Ecto.Migration

  def up do
    create table(:join_requests, primary_key: false) do
      add :id, :uuid, null: false, default: fragment("uuid_generate_v7()"), primary_key: true
      add :email, :string, null: false
      add :confirmation_token_hash, :string, null: false
      add :status, :string, null: false
      add :submitted_at, :utc_datetime_usec, null: false
      add :source, :string, null: false
      add :schema_version, :bigint, null: false
      add :payload, :map, null: true
      add :approved_at, :utc_datetime_usec, null: true
      add :rejected_at, :utc_datetime_usec, null: true
      add :reviewed_by_user_id, :uuid, null: true

      add :inserted_at, :utc_datetime_usec,
        null: false,
        default: fragment("(now() AT TIME ZONE 'utc')")

      add :updated_at, :utc_datetime_usec,
        null: false,
        default: fragment("(now() AT TIME ZONE 'utc')")
    end

    create unique_index(:join_requests, [:confirmation_token_hash],
             name: "join_requests_unique_confirmation_token_hash_index"
           )
  end

  def down do
    drop_if_exists unique_index(:join_requests, [:confirmation_token_hash],
                  name: "join_requests_unique_confirmation_token_hash_index"
                )

    drop table(:join_requests)
  end
end