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spec_dir = File.expand_path File.join(File.dirname(__FILE__))
$LOAD_PATH.unshift spec_dir
$LOAD_PATH.uniq!

require "apply_auth_examples"
require "googleauth/signet"
require "jwt"
require "openssl"
require "spec_helper"

describe Signet::OAuth2::Client do
  before :example do
    @key = OpenSSL::PKey::RSA.new 2048
    @client = Signet::OAuth2::Client.new(
      token_credential_uri: "https://oauth2.googleapis.com/token",
      scope:                "https://www.googleapis.com/auth/userinfo.profile",
      issuer:               "app@example.com",
      audience:             "https://oauth2.googleapis.com/token",
      signing_key:          @key
    )
  end

  def make_auth_stubs opts
    access_token = opts[:access_token] || ""
    body = MultiJson.dump("access_token" => access_token,
                          "token_type"   => "Bearer",
                          "expires_in"   => 3600)
    blk = proc do |request|
      params = Addressable::URI.form_unencode request.body
      _claim, _header = JWT.decode(params.assoc("assertion").last,
                                   @key.public_key, true,
                                   algorithm: "RS256")
    end
    with_params = { body: hash_including(
      "grant_type" => "urn:ietf:params:oauth:grant-type:jwt-bearer"
    ) }
    with_params[:headers] = { "User-Agent" => opts[:user_agent] } if opts[:user_agent]
    stub_request(:post, "https://oauth2.googleapis.com/token")
      .with(with_params, &blk)
      .to_return(body:    body,
                 status:  200,
                 headers: { "Content-Type" => "application/json" })
  end

  it_behaves_like "apply/apply! are OK"

  describe "#configure_connection" do
    it "honors default_connection" do
      token = "1/abcdef1234567890"
      stub = make_auth_stubs access_token: token, user_agent: "RubyRocks/1.0"
      conn = Faraday.new headers: { "User-Agent" => "RubyRocks/1.0" }
      @client.configure_connection default_connection: conn
      md = { foo: "bar" }
      @client.apply! md
      want = { foo: "bar", authorization: "Bearer #{token}" }
      expect(md).to eq(want)
      expect(stub).to have_been_requested
    end

    it "honors connection_builder" do
      token = "1/abcdef1234567890"
      stub = make_auth_stubs access_token: token, user_agent: "RubyRocks/2.0"
      connection_builder = proc do
        Faraday.new headers: { "User-Agent" => "RubyRocks/2.0" }
      end
      @client.configure_connection connection_builder: connection_builder
      md = { foo: "bar" }
      @client.apply! md
      want = { foo: "bar", authorization: "Bearer #{token}" }
      expect(md).to eq(want)
      expect(stub).to have_been_requested
    end
  end
end