defmodule Auth.Permission do
  @moduledoc """
  Defines permissions schema and CRUD functions
  """
  use Ecto.Schema
  import Ecto.Changeset
  import Ecto.Query, warn: false
  alias Auth.Repo
  # alias the Struct so we can use it below
  alias Auth.Permission

  schema "permissions" do
    field :desc, :string
    field :name, :string
    field :person_id, :id

    timestamps()
  end

  @doc false
  def changeset(permission, attrs) do
    permission
    |> cast(attrs, [:name, :desc])
    |> validate_required([:name, :desc])
  end

  @doc """
  Returns the list of permissions.

  ## Examples

      iex> list_permissions()
      [%Permission{}, ...]

  """
  def list_permissions do
    Repo.all(__MODULE__)
  end

  @doc """
  Gets a single permission.

  Raises `Ecto.NoResultsError` if the Permission does not exist.

  ## Examples

      iex> get_permission!(123)
      %Permission{}

      iex> get_permission!(456)
      ** (Ecto.NoResultsError)

  """
  def get_permission!(id), do: Repo.get!(__MODULE__, id)

  @doc """
  Creates a permission.

  ## Examples

      iex> create_permission(%{field: value})
      {:ok, %Permission{}}

      iex> create_permission(%{field: bad_value})
      {:error, %Ecto.Changeset{}}

  """
  def create_permission(attrs \\ %{}) do
    %Permission{}
    |> Permission.changeset(attrs)
    |> Repo.insert()
  end

  @doc """
  Updates a permission.

  ## Examples

      iex> update_permission(permission, %{field: new_value})
      {:ok, %Permission{}}

      iex> update_permission(permission, %{field: bad_value})
      {:error, %Ecto.Changeset{}}

  """
  def update_permission(%Permission{} = permission, attrs) do
    permission
    |> Permission.changeset(attrs)
    |> Repo.update()
  end

  @doc """
  Deletes a permission.

  ## Examples

      iex> delete_permission(permission)
      {:ok, %Permission{}}

      iex> delete_permission(permission)
      {:error, %Ecto.Changeset{}}

  """
  def delete_permission(%Permission{} = permission) do
    Repo.delete(permission)
  end

  @doc """
  Returns an `%Ecto.Changeset{}` for tracking permission changes.

  ## Examples

      iex> change_permission(permission)
      %Ecto.Changeset{data: %Permission{}}

  """
  def change_permission(%Permission{} = permission, attrs \\ %{}) do
    Permission.changeset(permission, attrs)
  end
end