defmodule RiverConnect.Repo.Migrations.CreateHierarchy do
  use Ecto.Migration

  def change do
    create table(:springs) do
      add :name, :string, null: false
      # :dm, :job, :custom
      add :type, :string, null: false
      add :description, :text

      timestamps()
    end

    create table(:rivers) do
      add :name, :string, null: false
      add :description, :text
      add :spring_id, references(:springs, on_delete: :delete_all), null: false

      timestamps()
    end

    create index(:rivers, [:spring_id])

    create table(:streams) do
      add :name, :string, null: false
      add :topic, :string
      add :river_id, references(:rivers, on_delete: :delete_all), null: false

      timestamps()
    end

    create index(:streams, [:river_id])

    create table(:trenches) do
      add :name, :string
      add :stream_id, references(:streams, on_delete: :delete_all), null: false

      timestamps()
    end

    create index(:trenches, [:stream_id])
  end
end