defmodule Assent.Strategy.Gitlab do
  @moduledoc """
  Gitlab OAuth 2.0 strategy.

  ## Usage

      config = [
        client_id: "REPLACE_WITH_CLIENT_ID",
        client_secret: "REPLACE_WITH_CLIENT_SECRET"
      ]

  See `Assent.Strategy.OAuth2` for more.
  """
  use Assent.Strategy.OAuth2.Base

  @impl true
  def default_config(_config) do
    [
      site: "https://gitlab.com",
      authorize_url: "/oauth/authorize",
      token_url: "/oauth/token",
      user_url: "/api/v4/user",
      authorization_params: [scope: "api read_user read_registry"],
      auth_method: :client_secret_post
    ]
  end

  @impl true
  def normalize(_config, user) do
    {:ok, %{
      "sub"                => user["id"],
      "name"               => user["name"],
      "preferred_username" => user["username"],
      "picture"            => user["avatar_url"],
      "email"              => user["email"],
      "email_verified"     => not is_nil(user["confirmed_at"])
    }}
  end
end