defmodule Entrance.User do
  @moduledoc """
    This module provider helpers functions for your app users management
  """
  alias Entrance.Auth.Secret

  import Entrance.Config, only: [config: 1]

  @doc """
  Execute this behind the scenes:
  ```
  alias Entrance.Auth.Secret

  # ...
  %YourUser{}
  |> YourUser.create_changeset(user_params)
  |> Secret.put_session_secret()
  |> YourRepo.insert()
  ```

  Returns `{:ok, user}` or `{:error, changeset}`

  Requires `user_module` and `repo` to be configured via
  `Mix.Config`.

  ### Examples

  ```
  {:ok, user} = Entrance.User.create(%{"email => "joe@dirt.com", "password" => "brandyr00lz"})
  ```

  If you want to use `create/2` with other user schema, you can set the module directly.

  ```
  {:ok, customer} = Entrance.User.create(Customer, %{"email => "joe@dirt.com", "password" => "brandyr00lz"})
  ```
  """
  def create(user_module \\ nil, user_params) do
    user_module = user_module || config(:user_module)

    struct(user_module)
    |> user_module.create_changeset(user_params)
    |> Secret.put_session_secret()
    |> config(:repo).insert()
  end

  @doc """
  Similar to `Entrance.User.create/2`, but returns the user struct and raises an error if `user_params` is invalid.

  Execute this behind the scenes:
  ```
  alias Entrance.Auth.Secret

  # ...
  %YourUser{}
  |> YourUser.create_changeset(user_params)
  |> Secret.put_session_secret()
  |> YourRepo.insert!()
  ```

  Requires `user_module` and `repo` to be configured via
  `Mix.Config`.

  ### Examples

  ```
  user = Entrance.User.create!(%{"email => "joe@dirt.com", "password" => "brandyr00lz"})
  ```

  If you want to use `create!/2` with other user schema, you can set the module directly.

  ```
  customer = Entrance.User.create!(Customer, %{"email => "joe@dirt.com", "password" => "brandyr00lz"})
  ```
  """
  def create!(user_module \\ nil, user_params) do
    user_module = user_module || config(:user_module)

    struct(user_module)
    |> user_module.create_changeset(user_params)
    |> Secret.put_session_secret()
    |> config(:repo).insert!()
  end

  @doc """
  Execute this behind the scenes:
  ```
  YourUser.create_changeset(%YourUser{}, %{})
  ```

  Returns an `Ecto.Changeset` struct

  Requires `user_module` to be configured via `Mix.Config`.

  ### Example

  ```
  # YourAppWeb.UserController ...
  def new(conn, _params) do
    conn |> render("new.html", changeset: Entrance.User.create_changeset)
  end
  ```
  """
  def create_changeset do
    user_module = config(:user_module)
    user_module.create_changeset(struct(user_module), %{})
  end

  @doc """
  Similar to `Entrance.User.create_changeset/0` but not need the `user_module` to be configured via `Mix.Config`

  ### Example

  ```
  # YourAppWeb.UserController ...
  def new(conn, _params) do
    conn |> render("new.html", changeset: Entrance.User.create_changeset(Customer))
  end
  ```
  """
  def create_changeset(user_module) do
    user_module.create_changeset(struct(user_module), %{})
  end
end