require "abstract_unit"

class SSLTest < ActionDispatch::IntegrationTest
  HEADERS = Rack::Utils::HeaderHash.new "Content-Type" => "text/html"

  attr_accessor :app

  def build_app(headers: {}, ssl_options: {})
    headers = HEADERS.merge(headers)
    ActionDispatch::SSL.new lambda { |env| [200, headers, []] }, ssl_options.reverse_merge(hsts: { subdomains: true })
  end
end

class RedirectSSLTest < SSLTest
  def assert_not_redirected(url, headers: {}, redirect: {})
    self.app = build_app ssl_options: { redirect: redirect }
    get url, headers: headers
    assert_response :ok
  end

  def assert_redirected(redirect: {}, from: "http://a/b?c=d", to: from.sub("http", "https"))
    redirect = { status: 301, body: [] }.merge(redirect)

    self.app = build_app ssl_options: { redirect: redirect }

    get from
    assert_response redirect[:status] || 301
    assert_redirected_to to
    assert_equal redirect[:body].join, @response.body
  end

  def assert_post_redirected(redirect: {}, from: "http://a/b?c=d",
    to: from.sub("http", "https"))

    self.app = build_app ssl_options: { redirect: redirect }

    post from
    assert_response redirect[:status] || 307
    assert_redirected_to to
  end

  test "exclude can avoid redirect" do
    excluding = { exclude: -> request { request.path =~ /healthcheck/ } }

    assert_not_redirected "http://example.org/healthcheck", redirect: excluding
    assert_redirected from: "http://example.org/", redirect: excluding
  end

  test "https is not redirected" do
    assert_not_redirected "https://example.org"
  end

  test "proxied https is not redirected" do
    assert_not_redirected "http://example.org", headers: { "HTTP_X_FORWARDED_PROTO" => "https" }
  end

  test "http is redirected to https" do
    assert_redirected
  end

  test "http POST is redirected to https with status 307" do
    assert_post_redirected
  end

  test "redirect with non-301 status" do
    assert_redirected redirect: { status: 307 }
  end

  test "redirect with custom body" do
    assert_redirected redirect: { body: ["foo"] }
  end

  test "redirect to specific host" do
    assert_redirected redirect: { host: "ssl" }, to: "https://ssl/b?c=d"
  end

  test "redirect to default port" do
    assert_redirected redirect: { port: 443 }
  end

  test "redirect to non-default port" do
    assert_redirected redirect: { port: 8443 }, to: "https://a:8443/b?c=d"
  end

  test "redirect to different host and non-default port" do
    assert_redirected redirect: { host: "ssl", port: 8443 }, to: "https://ssl:8443/b?c=d"
  end

  test "redirect to different host including port" do
    assert_redirected redirect: { host: "ssl:443" }, to: "https://ssl:443/b?c=d"
  end

  test "no redirect with redirect set to false" do
    assert_not_redirected "http://example.org", redirect: false
  end
end

class StrictTransportSecurityTest < SSLTest
  EXPECTED = "max-age=15552000"
  EXPECTED_WITH_SUBDOMAINS = "max-age=15552000; includeSubDomains"

  def assert_hsts(expected, url: "https://example.org", hsts: { subdomains: true }, headers: {})
    self.app = build_app ssl_options: { hsts: hsts }, headers: headers
    get url
    if expected.nil?
      assert_nil response.headers["Strict-Transport-Security"]
    else
      assert_equal expected, response.headers["Strict-Transport-Security"]
    end
  end

  test "enabled by default" do
    assert_hsts EXPECTED_WITH_SUBDOMAINS
  end

  test "not sent with http:// responses" do
    assert_hsts nil, url: "http://example.org"
  end

  test "defers to app-provided header" do
    assert_hsts "app-provided", headers: { "Strict-Transport-Security" => "app-provided" }
  end

  test "hsts: true enables default settings" do
    assert_hsts EXPECTED_WITH_SUBDOMAINS, hsts: true
  end

  test "hsts: false sets max-age to zero, clearing browser HSTS settings" do
    assert_hsts "max-age=0; includeSubDomains", hsts: false
  end

  test ":expires sets max-age" do
    assert_hsts "max-age=500; includeSubDomains", hsts: { expires: 500 }
  end

  test ":expires supports AS::Duration arguments" do
    assert_hsts "max-age=31556952; includeSubDomains", hsts: { expires: 1.year }
  end

  test "include subdomains" do
    assert_hsts "#{EXPECTED}; includeSubDomains", hsts: { subdomains: true }
  end

  test "exclude subdomains" do
    assert_hsts EXPECTED, hsts: { subdomains: false }
  end

  test "opt in to browser preload lists" do
    assert_hsts "#{EXPECTED_WITH_SUBDOMAINS}; preload", hsts: { preload: true }
  end

  test "opt out of browser preload lists" do
    assert_hsts EXPECTED_WITH_SUBDOMAINS, hsts: { preload: false }
  end
end

class SecureCookiesTest < SSLTest
  DEFAULT = %(id=1; path=/\ntoken=abc; path=/; secure; HttpOnly)

  def get(**options)
    self.app = build_app(**options)
    super "https://example.org"
  end

  def assert_cookies(*expected)
    assert_equal expected, response.headers["Set-Cookie"].split("\n")
  end

  def test_flag_cookies_as_secure
    get headers: { "Set-Cookie" => DEFAULT }
    assert_cookies "id=1; path=/; secure", "token=abc; path=/; secure; HttpOnly"
  end

  def test_flag_cookies_as_secure_at_end_of_line
    get headers: { "Set-Cookie" => "problem=def; path=/; HttpOnly; secure" }
    assert_cookies "problem=def; path=/; HttpOnly; secure"
  end

  def test_flag_cookies_as_secure_with_more_spaces_before
    get headers: { "Set-Cookie" => "problem=def; path=/; HttpOnly;  secure" }
    assert_cookies "problem=def; path=/; HttpOnly;  secure"
  end

  def test_flag_cookies_as_secure_with_more_spaces_after
    get headers: { "Set-Cookie" => "problem=def; path=/; secure;  HttpOnly" }
    assert_cookies "problem=def; path=/; secure;  HttpOnly"
  end

  def test_flag_cookies_as_secure_with_has_not_spaces_before
    get headers: { "Set-Cookie" => "problem=def; path=/;secure; HttpOnly" }
    assert_cookies "problem=def; path=/;secure; HttpOnly"
  end

  def test_flag_cookies_as_secure_with_has_not_spaces_after
    get headers: { "Set-Cookie" => "problem=def; path=/; secure;HttpOnly" }
    assert_cookies "problem=def; path=/; secure;HttpOnly"
  end

  def test_flag_cookies_as_secure_with_ignore_case
    get headers: { "Set-Cookie" => "problem=def; path=/; Secure; HttpOnly" }
    assert_cookies "problem=def; path=/; Secure; HttpOnly"
  end

  def test_cookies_as_not_secure_with_secure_cookies_disabled
    get headers: { "Set-Cookie" => DEFAULT }, ssl_options: { secure_cookies: false }
    assert_cookies(*DEFAULT.split("\n"))
  end

  def test_no_cookies
    get
    assert_nil response.headers["Set-Cookie"]
  end

  def test_keeps_original_headers_behavior
    get headers: { "Connection" => %w[close] }
    assert_equal "close", response.headers["Connection"]
  end
end