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defmodule PlausibleWeb.SSOControllerTest do
  use PlausibleWeb.ConnCase, async: true

  @moduletag :ee_only

  on_ee do
    alias Plausible.Auth
    alias Plausible.Auth.SSO
    alias Plausible.Repo

    setup do
      owner = new_user()
      team = new_site(owner: owner).team |> Plausible.Teams.complete_setup()
      integration = SSO.initiate_saml_integration(team)
      domain = "example-#{Enum.random(1..10_000)}.com"

      {:ok, sso_domain} = SSO.Domains.add(integration, domain)
      sso_domain = SSO.Domains.verify(sso_domain, skip_checks?: true)

      {:ok,
       owner: owner, team: team, integration: integration, domain: domain, sso_domain: sso_domain}
    end

    describe "settings item visibility" do
      test "sso team settings item renders when SSO feature plan is added", %{conn: conn} do
        user =
          new_user() |> subscribe_to_enterprise_plan(features: [Plausible.Billing.Feature.SSO])

        team = new_site(owner: user).team |> Plausible.Teams.complete_setup()
        {:ok, conn: conn} = log_in(%{conn: conn, user: user})
        conn = set_current_team(conn, team)

        conn = get(conn, Routes.settings_path(conn, :team_general))

        assert html = html_response(conn, 200)

        assert html =~ "/settings/sso/general"
        refute html =~ "/settings/sso/info"
      end

      test "sso team settings item is hidden when there's no SSO plan feature", %{conn: conn} do
        user = new_user()
        team = new_site(owner: user).team |> Plausible.Teams.complete_setup()
        {:ok, conn: conn} = log_in(%{conn: conn, user: user})
        conn = set_current_team(conn, team)

        conn = get(conn, Routes.settings_path(conn, :team_general))

        assert html = html_response(conn, 200)

        refute html =~ "/settings/sso/general"
        assert html =~ "/settings/sso/info"
      end
    end

    describe "login_form/2" do
      test "renders login view", %{conn: conn} do
        conn = get(conn, Routes.sso_path(conn, :login_form, prefer: "sso"))

        assert html = html_response(conn, 200)

        assert html =~ "Sign in with SSO"
        assert element_exists?(html, "input[name=email]")
        assert text_of_attr(html, ~s|input[name="return_to"]|, "value") == nil
      end

      test "renders autosubmit js snippet when instructed", %{conn: conn} do
        conn =
          get(
            conn,
            Routes.sso_path(conn, :login_form,
              prefer: "sso",
              email: "user@example.com",
              autosubmit: true
            )
          )

        assert html = html_response(conn, 200)

        assert html =~ "Sign in with SSO"
        assert text_of_attr(html, "input[name=email]", "value") == "user@example.com"
        assert html =~ ~s|document.getElementById("sso-login-form").submit()|
      end

      test "passes return_to parameter to form", %{conn: conn} do
        conn = get(conn, Routes.sso_path(conn, :login_form, return_to: "/sites", prefer: "sso"))

        assert html = html_response(conn, 200)

        assert text_of_attr(html, "input[name=return_to]", "value") == "/sites"
      end

      test "renders error if provided in login_error flash message", %{conn: conn} do
        conn =
          conn
          |> init_session()
          |> fetch_session()
          |> fetch_flash()
          |> put_flash(:login_error, "We couldn't find a Single Sign-On account for that email.")

        conn = get(conn, Routes.sso_path(conn, :login_form, return_to: "/sites"))

        assert html = html_response(conn, 200)

        assert html =~ htmlize_quotes("We couldn't find a Single Sign-On account for that email.")
        assert element_exists?(html, "input[name=email]")
        assert text_of_attr(html, "input[name=return_to]", "value") == "/sites"
      end
    end

    describe "login/2" do
      test "redirects to SAML signin on matching integration", %{
        conn: conn,
        domain: domain,
        integration: integration
      } do
        email = "paul@" <> domain

        conn = post(conn, Routes.sso_path(conn, :login), %{"email" => email})

        assert redirected_to(conn, 302) ==
                 Routes.sso_path(conn, :saml_signin, integration.identifier,
                   email: email,
                   return_to: ""
                 )
      end

      test "passes redirect path if provided", %{
        conn: conn,
        domain: domain,
        integration: integration
      } do
        email = "claire@" <> domain

        conn =
          post(conn, Routes.sso_path(conn, :login), %{"email" => email, "return_to" => "/sites"})

        assert redirected_to(conn, 302) ==
                 Routes.sso_path(conn, :saml_signin, integration.identifier,
                   email: email,
                   return_to: "/sites"
                 )
      end

      test "renders login form with error on no matching integration", %{conn: conn} do
        conn =
          post(conn, Routes.sso_path(conn, :login), %{
            "email" => "nomatch@example.com",
            "return_to" => "/sites"
          })

        assert redirected_to(conn, 302) == Routes.sso_path(conn, :login_form)

        assert Phoenix.Flash.get(conn.assigns.flash, :login_error) ==
                 "We couldn't find a Single Sign-On account for that email."
      end

      test "limits login attempts to 5 per minute", %{conn: conn} do
        conn = put_req_header(conn, "x-forwarded-for", "1.2.3.9")
        email = "invalid@example.com"

        response =
          eventually(
            fn ->
              Enum.each(1..5, fn _ ->
                post(conn, Routes.sso_path(conn, :login), %{"email" => email})
              end)

              conn = post(conn, Routes.sso_path(conn, :login), %{"email" => email})

              {conn.status == 429, conn}
            end,
            500
          )

        assert html_response(response, 429) =~ "Too many login attempts"
      end
    end

    describe "saml_signin/2 (fake SAML)" do
      test "renders autosubmitted form", %{conn: conn, domain: domain, integration: integration} do
        email = "jesper@" <> domain

        conn =
          get(
            conn,
            Routes.sso_path(conn, :saml_signin, integration.identifier,
              email: email,
              return_to: "/sites"
            )
          )

        assert html = html_response(conn, 200)

        assert html =~ "Processing Single Sign-On request..."

        assert text_of_attr(html, "form#sso-req-form", "action") ==
                 Routes.sso_path(conn, :saml_consume, integration.identifier)

        assert text_of_attr(html, "input[name=email]", "value") == email
        assert text_of_attr(html, "input[name=return_to]", "value") == "/sites"
      end
    end

    describe "saml_consume/2 (fake SAML)" do
      test "provisions identity for new user", %{
        conn: conn,
        domain: domain,
        integration: integration
      } do
        email = "dana.lake@" <> domain

        conn =
          post(conn, Routes.sso_path(conn, :saml_consume, integration.identifier), %{
            "email" => email,
            "return_to" => "/sites"
          })

        assert redirected_to(conn, 302) == "/sites"

        assert %{sessions: [sso_session]} =
                 user = Repo.get_by(Plausible.Auth.User, email: email) |> Repo.preload(:sessions)

        assert user.type == :sso
        assert user.email == email
        assert user.name == "Dana Lake"
        assert get_session(conn, :user_token) == sso_session.token
      end

      test "provisions identity for existing user", %{
        conn: conn,
        team: team,
        domain: domain,
        integration: integration
      } do
        email = "dana@" <> domain

        existing_user = new_user(name: "Dana Woodworth", email: email)

        add_member(team, user: existing_user, role: :admin)

        conn =
          post(conn, Routes.sso_path(conn, :saml_consume, integration.identifier), %{
            "email" => email,
            "return_to" => "/sites"
          })

        assert redirected_to(conn, 302) == "/sites"

        assert %{sessions: [sso_session]} =
                 user = Repo.get_by(Plausible.Auth.User, email: email) |> Repo.preload(:sessions)

        assert user.type == :sso
        assert user.email == email
        assert user.name == "Dana Woodworth"
        assert get_session(conn, :user_token) == sso_session.token
      end

      test "redirects to login when no matching integration found", %{conn: conn} do
        conn =
          post(conn, Routes.sso_path(conn, :saml_consume, Ecto.UUID.generate()), %{
            "email" => "missed@example.com",
            "return_to" => "/sites"
          })

        assert redirected_to(conn, 302) == Routes.sso_path(conn, :login_form, return_to: "/sites")

        assert Phoenix.Flash.get(conn.assigns.flash, :login_error) ==
                 "We couldn't find a Single Sign-On account for that email."
      end
    end

    describe "sso_settings/2" do
      setup [:create_user, :log_in, :create_team]

      test "redirects when team is not setup", %{conn: conn, team: team} do
        conn = set_current_team(conn, team)
        conn = get(conn, Routes.sso_path(conn, :sso_settings))

        assert redirected_to(conn, 302) == "/sites"
      end

      test "redirects when team lacks SSO plan feature", %{conn: conn, team: team} do
        team = Plausible.Teams.complete_setup(team)
        conn = set_current_team(conn, team)
        conn = get(conn, Routes.sso_path(conn, :sso_settings))

        assert redirected_to(conn, 302) == "/sites"
      end

      test "renders when team has SSO plan feature", %{conn: conn, team: team, user: user} do
        user |> subscribe_to_enterprise_plan(features: [Plausible.Billing.Feature.SSO])
        team = Plausible.Teams.complete_setup(team)
        conn = set_current_team(conn, team)
        conn = get(conn, Routes.sso_path(conn, :sso_settings))

        assert html = html_response(conn, 200)

        assert html =~ "Configure and manage Single Sign-On for your team"
      end
    end

    describe "provision_notice/2" do
      test "renders the notice", %{conn: conn} do
        conn = get(conn, Routes.sso_path(conn, :provision_notice))

        assert html = html_response(conn, 200)

        assert html =~ "Single Sign-On required"
        assert html =~ "has turned off email and password logins"
        assert html =~ "To access this team,"
        assert html =~ "sign out"
        assert html =~ "and sign in with SSO"
      end
    end

    describe "provision_issue/2" do
      test "renders issue for not_a_member", %{conn: conn} do
        conn = get(conn, Routes.sso_path(conn, :provision_issue, issue: "not_a_member"))

        assert html = html_response(conn, 200)

        assert html =~ "Single Sign-On required"
        assert html =~ "To access this team, you must be added as a team member first"
      end

      test "renders issue for multiple_memberships", %{conn: conn} do
        conn = get(conn, Routes.sso_path(conn, :provision_issue, issue: "multiple_memberships"))

        assert html = html_response(conn, 200)

        assert html =~ "Single Sign-On required"
        assert html =~ "To access this team, you must leave all other teams first"
      end

      test "renders issue for multiple_memberships_noforce", %{conn: conn} do
        conn =
          get(
            conn,
            Routes.sso_path(conn, :provision_issue, issue: "multiple_memberships_noforce")
          )

        assert html = html_response(conn, 200)

        assert html =~ "Single Sign-On required"
        assert html =~ "To sign in with SSO, you must leave all other teams first"

        assert html =~ "Sign in with email and password"
        assert html =~ "to resolve the issue"
      end

      test "renders issue for active_personal_team", %{conn: conn} do
        conn = get(conn, Routes.sso_path(conn, :provision_issue, issue: "active_personal_team"))

        assert html = html_response(conn, 200)

        assert html =~ "Single Sign-On required"
        assert html =~ "To access this team, remove or transfer all sites under"
        assert html =~ "My Personal Sites"
        assert html =~ "cancel its subscription if active"
      end

      test "renders issue for active_personal_team_noforce", %{conn: conn} do
        conn =
          get(
            conn,
            Routes.sso_path(conn, :provision_issue, issue: "active_personal_team_noforce")
          )

        assert html = html_response(conn, 200)

        assert html =~ "Single Sign-On required"
        assert html =~ "To sign in with SSO, remove or transfer all sites under"
        assert html =~ "My Personal Sites"
        assert html =~ "cancel its subscription if active"

        assert html =~ "Sign in with email and password"
        assert html =~ "to resolve the issue"
      end
    end

    describe "team_sessions/2" do
      setup %{conn: conn, team: team, owner: owner} do
        %{conn: conn} =
          %{conn: conn, user: owner}
          |> setup_do(&log_in/1)

        conn = set_current_team(conn, team)

        {:ok, conn: conn}
      end

      test "lists SSO sessions", %{conn: conn, domain: domain, integration: integration} do
        now = NaiveDateTime.utc_now(:second)

        %{user: user1} =
          %{user: %{name: "Frank Rubin", email: "frank@" <> domain}, sso_integration: integration}
          |> setup_do(&provision_sso_user/1)

        Auth.UserSessions.create!(user1, "Device 1", now: NaiveDateTime.shift(now, hour: -3))

        %{user: user2} =
          %{
            user: %{name: "Grace Holmes", email: "grace@" <> domain},
            sso_integration: integration
          }
          |> setup_do(&provision_sso_user/1)

        Auth.UserSessions.create!(user2, "Device 2")
        Auth.UserSessions.create!(user2, "Device 3", now: NaiveDateTime.shift(now, hour: -6))

        %{user: user3} =
          %{user: %{name: "Kate Loselet", email: "kate@" <> domain}, sso_integration: integration}
          |> setup_do(&provision_sso_user/1)

        Auth.UserSessions.create!(user3, "Device 4", now: NaiveDateTime.shift(now, hour: -2))

        conn = get(conn, Routes.sso_path(conn, :team_sessions))

        assert html = html_response(conn, 200)

        assert ["Grace Holmes", "Kate Loselet", "Frank Rubin", "Grace Holmes"] =
                 find(html, "table#sso-sessions-list tr td:nth-of-type(1)")
                 |> Enum.map(&text/1)

        assert ["Device 2", "Device 4", "Device 1", "Device 3"] =
                 find(html, "table#sso-sessions-list tr td:nth-of-type(2)")
                 |> Enum.map(&text/1)
      end

      test "shows empty state when there are no sessions", %{conn: conn} do
        conn = get(conn, Routes.sso_path(conn, :team_sessions))

        assert html = html_response(conn, 200)

        assert html =~ "There are currently no active SSO sessions"
      end
    end

    describe "delete_session/2" do
      setup %{conn: conn, team: team, owner: owner} do
        %{conn: conn} =
          %{conn: conn, user: owner}
          |> setup_do(&log_in/1)

        conn = set_current_team(conn, team)

        {:ok, conn: conn}
      end

      test "revokes session and redirects back to sessions list", %{
        conn: conn,
        domain: domain,
        integration: integration
      } do
        %{user: user} =
          %{user: %{name: "Frank Rubin", email: "frank@" <> domain}, sso_integration: integration}
          |> setup_do(&provision_sso_user/1)

        session = Auth.UserSessions.create!(user, "Unknown")

        conn = delete(conn, Routes.sso_path(conn, :delete_session, session.id))

        assert redirected_to(conn, 302) == Routes.sso_path(conn, :team_sessions)

        assert Phoenix.Flash.get(conn.assigns.flash, :success) ==
                 "Session logged out successfully"

        refute Repo.reload(session)
      end
    end
  end
end