defmodule ToweropsWeb.UserAuthTest do
  use ToweropsWeb.ConnCase, async: true
  use ExUnitProperties

  import Towerops.AccountsFixtures

  alias Phoenix.LiveView.Socket
  alias Towerops.Accounts
  alias Towerops.Accounts.Scope
  alias ToweropsWeb.UserAuth

  @remember_me_cookie "_towerops_web_user_remember_me"
  @remember_me_cookie_max_age 60 * 60 * 24 * 14

  setup %{conn: conn} do
    conn =
      conn
      |> Map.replace!(:secret_key_base, ToweropsWeb.Endpoint.config(:secret_key_base))
      |> init_test_session(%{})

    %{user: %{user_fixture() | authenticated_at: DateTime.utc_now(:second)}, conn: conn}
  end

  describe "log_in_user/3" do
    test "stores the user token in the session", %{conn: conn, user: user} do
      conn = UserAuth.log_in_user(conn, user)
      assert token = get_session(conn, :user_token)
      assert redirected_to(conn) == ~p"/orgs"
      assert Accounts.get_user_by_session_token(token)
    end

    test "clears everything previously stored in the session", %{conn: conn, user: user} do
      conn = conn |> put_session(:to_be_removed, "value") |> UserAuth.log_in_user(user)
      refute get_session(conn, :to_be_removed)
    end

    test "keeps session when re-authenticating", %{conn: conn, user: user} do
      conn =
        conn
        |> assign(:current_scope, Scope.for_user(user))
        |> put_session(:to_be_removed, "value")
        |> UserAuth.log_in_user(user)

      assert get_session(conn, :to_be_removed)
    end

    test "clears session when user does not match when re-authenticating", %{
      conn: conn,
      user: user
    } do
      other_user = user_fixture()

      conn =
        conn
        |> assign(:current_scope, Scope.for_user(other_user))
        |> put_session(:to_be_removed, "value")
        |> UserAuth.log_in_user(user)

      refute get_session(conn, :to_be_removed)
    end

    test "redirects to the configured path", %{conn: conn, user: user} do
      conn = conn |> put_session(:user_return_to, "/hello") |> UserAuth.log_in_user(user)
      assert redirected_to(conn) == "/hello"
    end

    test "writes a cookie if remember_me is configured", %{conn: conn, user: user} do
      conn = conn |> fetch_cookies() |> UserAuth.log_in_user(user, %{"remember_me" => "true"})
      assert get_session(conn, :user_token) == conn.cookies[@remember_me_cookie]
      assert get_session(conn, :user_remember_me) == true

      assert %{value: signed_token, max_age: max_age} = conn.resp_cookies[@remember_me_cookie]
      assert signed_token != get_session(conn, :user_token)
      assert max_age == @remember_me_cookie_max_age
    end

    test "writes a cookie if remember_me was set in previous session", %{conn: conn, user: user} do
      conn = conn |> fetch_cookies() |> UserAuth.log_in_user(user, %{"remember_me" => "true"})
      assert get_session(conn, :user_token) == conn.cookies[@remember_me_cookie]
      assert get_session(conn, :user_remember_me) == true

      conn =
        conn
        |> recycle()
        |> Map.replace!(:secret_key_base, ToweropsWeb.Endpoint.config(:secret_key_base))
        |> fetch_cookies()
        |> init_test_session(%{user_remember_me: true})

      # the conn is already logged in and has the remember_me cookie set,
      # now we log in again and even without explicitly setting remember_me,
      # the cookie should be set again
      conn = UserAuth.log_in_user(conn, user, %{})
      assert %{value: signed_token, max_age: max_age} = conn.resp_cookies[@remember_me_cookie]
      assert signed_token != get_session(conn, :user_token)
      assert max_age == @remember_me_cookie_max_age
      assert get_session(conn, :user_remember_me) == true
    end
  end

  describe "logout_user/1" do
    test "erases session and cookies", %{conn: conn, user: user} do
      user_token = Accounts.generate_user_session_token(user)

      conn =
        conn
        |> put_session(:user_token, user_token)
        |> put_req_cookie(@remember_me_cookie, user_token)
        |> fetch_cookies()
        |> UserAuth.log_out_user()

      refute get_session(conn, :user_token)
      refute conn.cookies[@remember_me_cookie]
      assert %{max_age: 0} = conn.resp_cookies[@remember_me_cookie]
      assert redirected_to(conn) == ~p"/users/log-in"
      refute Accounts.get_user_by_session_token(user_token)
    end

    test "works even if user is already logged out", %{conn: conn} do
      conn = conn |> fetch_cookies() |> UserAuth.log_out_user()
      refute get_session(conn, :user_token)
      assert %{max_age: 0} = conn.resp_cookies[@remember_me_cookie]
      assert redirected_to(conn) == ~p"/users/log-in"
    end
  end

  describe "fetch_current_scope_for_user/2" do
    test "authenticates user from session", %{conn: conn, user: user} do
      user_token = Accounts.generate_user_session_token(user)

      conn =
        conn |> put_session(:user_token, user_token) |> UserAuth.fetch_current_scope_for_user([])

      assert conn.assigns.current_scope.user.id == user.id
      assert conn.assigns.current_scope.user.authenticated_at == user.authenticated_at
      assert get_session(conn, :user_token) == user_token
    end

    test "authenticates user from cookies", %{conn: conn, user: user} do
      logged_in_conn =
        conn |> fetch_cookies() |> UserAuth.log_in_user(user, %{"remember_me" => "true"})

      user_token = logged_in_conn.cookies[@remember_me_cookie]
      %{value: signed_token} = logged_in_conn.resp_cookies[@remember_me_cookie]

      conn =
        conn
        |> put_req_cookie(@remember_me_cookie, signed_token)
        |> UserAuth.fetch_current_scope_for_user([])

      assert conn.assigns.current_scope.user.id == user.id
      assert conn.assigns.current_scope.user.authenticated_at == user.authenticated_at
      assert get_session(conn, :user_token) == user_token
      assert get_session(conn, :user_remember_me)
    end

    test "does not authenticate if data is missing", %{conn: conn, user: user} do
      _ = Accounts.generate_user_session_token(user)
      conn = UserAuth.fetch_current_scope_for_user(conn, [])
      refute get_session(conn, :user_token)
      refute conn.assigns.current_scope
    end

    test "reissues a new token after a few days and refreshes cookie", %{conn: conn, user: user} do
      logged_in_conn =
        conn |> fetch_cookies() |> UserAuth.log_in_user(user, %{"remember_me" => "true"})

      token = logged_in_conn.cookies[@remember_me_cookie]
      %{value: signed_token} = logged_in_conn.resp_cookies[@remember_me_cookie]

      offset_user_token(token, -10, :day)
      {user, _} = Accounts.get_user_by_session_token(token)

      conn =
        conn
        |> put_session(:user_token, token)
        |> put_session(:user_remember_me, true)
        |> put_req_cookie(@remember_me_cookie, signed_token)
        |> UserAuth.fetch_current_scope_for_user([])

      assert conn.assigns.current_scope.user.id == user.id
      assert conn.assigns.current_scope.user.authenticated_at == user.authenticated_at
      assert new_token = get_session(conn, :user_token)
      assert new_token != token
      assert %{value: new_signed_token, max_age: max_age} = conn.resp_cookies[@remember_me_cookie]
      assert new_signed_token != signed_token
      assert max_age == @remember_me_cookie_max_age
    end
  end

  describe "require_sudo_mode/2" do
    test "redirects to sudo verify when sudo mode expired and TOTP enabled", %{conn: conn} do
      user = user_fixture()

      # Create TOTP device
      {:ok, _device, _secret} =
        Accounts.create_totp_device(user.id, "Test Device", NimbleTOTP.secret())

      conn =
        conn
        |> fetch_flash()
        |> assign(:current_scope, Scope.for_user(user))
        |> UserAuth.require_sudo_mode([])

      assert redirected_to(conn) == ~p"/users/sudo-verify"
      assert Phoenix.Flash.get(conn.assigns.flash, :error) =~ "verify your identity"
    end

    test "redirects to TOTP enrollment when sudo mode expired and no TOTP", %{conn: conn} do
      user = user_fixture(enable_totp: false)

      conn =
        conn
        |> fetch_flash()
        |> assign(:current_scope, Scope.for_user(user))
        |> UserAuth.require_sudo_mode([])

      assert redirected_to(conn) == ~p"/account/totp-enrollment"
      assert Phoenix.Flash.get(conn.assigns.flash, :error) =~ "Two-factor authentication"
    end

    test "allows access when sudo mode is active", %{conn: conn} do
      user = user_fixture()
      {:ok, user} = Accounts.grant_sudo_mode(user)

      conn =
        conn
        |> fetch_flash()
        |> assign(:current_scope, Scope.for_user(user))
        |> UserAuth.require_sudo_mode([])

      refute conn.halted
    end

    test "stores return path on GET requests when redirecting", %{conn: conn} do
      user = user_fixture()

      # Create TOTP device
      {:ok, _device, _secret} =
        Accounts.create_totp_device(user.id, "Test Device", NimbleTOTP.secret())

      conn =
        %{conn | path_info: ["admin", "users"], query_string: "", method: "GET"}
        |> fetch_flash()
        |> assign(:current_scope, Scope.for_user(user))
        |> UserAuth.require_sudo_mode([])

      assert redirected_to(conn) == ~p"/users/sudo-verify"
      assert get_session(conn, :user_return_to) == "/admin/users"
    end
  end

  describe "redirect_if_user_is_authenticated/2" do
    setup %{conn: conn} do
      %{conn: UserAuth.fetch_current_scope_for_user(conn, [])}
    end

    test "redirects if user is authenticated", %{conn: conn, user: user} do
      conn =
        conn
        |> assign(:current_scope, Scope.for_user(user))
        |> UserAuth.redirect_if_user_is_authenticated([])

      assert conn.halted
      assert redirected_to(conn) == ~p"/orgs"
    end

    test "does not redirect if user is not authenticated", %{conn: conn} do
      conn = UserAuth.redirect_if_user_is_authenticated(conn, [])
      refute conn.halted
      refute conn.status
    end
  end

  describe "require_authenticated_user/2" do
    setup %{conn: conn} do
      %{conn: UserAuth.fetch_current_scope_for_user(conn, [])}
    end

    test "redirects if user is not authenticated", %{conn: conn} do
      conn = conn |> fetch_flash() |> UserAuth.require_authenticated_user([])
      assert conn.halted

      assert redirected_to(conn) == ~p"/users/log-in"

      assert Phoenix.Flash.get(conn.assigns.flash, :error) ==
               "You must log in to access this page."
    end

    test "stores the path to redirect to on GET", %{conn: conn} do
      halted_conn =
        %{conn | path_info: ["foo"], query_string: ""}
        |> fetch_flash()
        |> UserAuth.require_authenticated_user([])

      assert halted_conn.halted
      assert get_session(halted_conn, :user_return_to) == "/foo"

      halted_conn =
        %{conn | path_info: ["foo"], query_string: "bar=baz"}
        |> fetch_flash()
        |> UserAuth.require_authenticated_user([])

      assert halted_conn.halted
      assert get_session(halted_conn, :user_return_to) == "/foo?bar=baz"

      halted_conn =
        %{conn | path_info: ["foo"], query_string: "bar", method: "POST"}
        |> fetch_flash()
        |> UserAuth.require_authenticated_user([])

      assert halted_conn.halted
      refute get_session(halted_conn, :user_return_to)
    end

    test "does not redirect if user is authenticated", %{conn: conn, user: user} do
      conn =
        conn
        |> assign(:current_scope, Scope.for_user(user))
        |> UserAuth.require_authenticated_user([])

      refute conn.halted
      refute conn.status
    end
  end

  describe "require_superuser/2" do
    test "allows superusers", %{conn: conn} do
      superuser =
        user_fixture()
        |> Ecto.Changeset.change(%{is_superuser: true})
        |> Towerops.Repo.update!()

      conn =
        conn
        |> fetch_flash()
        |> assign(:current_scope, Scope.for_user(superuser))
        |> UserAuth.require_superuser([])

      refute conn.halted
    end

    test "redirects non-superusers", %{conn: conn, user: user} do
      conn =
        conn
        |> fetch_flash()
        |> assign(:current_scope, Scope.for_user(user))
        |> UserAuth.require_superuser([])

      assert conn.halted
      assert redirected_to(conn) == ~p"/orgs"

      assert Phoenix.Flash.get(conn.assigns.flash, :error) ==
               "You must be a superuser to access this page."
    end

    test "redirects if not authenticated", %{conn: conn} do
      conn =
        conn
        |> fetch_flash()
        |> assign(:current_scope, Scope.for_user(nil))
        |> UserAuth.require_superuser([])

      assert conn.halted
      assert redirected_to(conn) == ~p"/orgs"
    end
  end

  describe "load_current_organization/2" do
    test "loads organization for member", %{conn: conn, user: user} do
      {:ok, organization} = Towerops.Organizations.create_organization(%{name: "Test Org"}, user.id)

      conn =
        conn
        |> fetch_flash()
        |> assign(:current_scope, Scope.for_user(user))
        |> Map.put(:path_params, %{"org_slug" => organization.slug})
        |> UserAuth.load_current_organization([])

      refute conn.halted
      assert conn.assigns.current_scope.organization.id == organization.id
      assert conn.assigns.current_membership
    end

    test "redirects for non-member", %{conn: conn, user: user} do
      other_user = user_fixture()
      {:ok, organization} = Towerops.Organizations.create_organization(%{name: "Other Org"}, other_user.id)

      conn =
        conn
        |> fetch_flash()
        |> assign(:current_scope, Scope.for_user(user))
        |> Map.put(:path_params, %{"org_slug" => organization.slug})
        |> UserAuth.load_current_organization([])

      assert conn.halted
      assert redirected_to(conn) == ~p"/orgs"

      assert Phoenix.Flash.get(conn.assigns.flash, :error) ==
               "You don't have access to this organization."
    end

    test "redirects for non-existent organization", %{conn: conn, user: user} do
      conn =
        conn
        |> fetch_flash()
        |> assign(:current_scope, Scope.for_user(user))
        |> Map.put(:path_params, %{"org_slug" => "non-existent"})
        |> UserAuth.load_current_organization([])

      assert conn.halted
      assert redirected_to(conn) == ~p"/orgs"
      assert Phoenix.Flash.get(conn.assigns.flash, :error) == "Organization not found."
    end

    test "redirects if no org_slug", %{conn: conn, user: user} do
      conn =
        conn
        |> fetch_flash()
        |> assign(:current_scope, Scope.for_user(user))
        |> Map.put(:path_params, %{})
        |> UserAuth.load_current_organization([])

      assert conn.halted
      assert redirected_to(conn) == ~p"/orgs"
    end

    test "redirects if no user", %{conn: conn} do
      conn =
        conn
        |> fetch_flash()
        |> assign(:current_scope, Scope.for_user(nil))
        |> Map.put(:path_params, %{"org_slug" => "test"})
        |> UserAuth.load_current_organization([])

      assert conn.halted
      assert redirected_to(conn) == ~p"/orgs"
    end
  end

  describe "fetch_current_scope_for_user/2 with impersonation" do
    test "handles valid impersonation", %{conn: conn} do
      superuser = user_fixture(%{is_superuser: true})
      target_user = user_fixture()

      conn =
        conn
        |> put_session(:impersonating, true)
        |> put_session(:superuser_id, superuser.id)
        |> put_session(:target_user_id, target_user.id)
        |> UserAuth.fetch_current_scope_for_user([])

      assert conn.assigns.current_scope.user.id == target_user.id
      assert conn.assigns.current_scope.superuser.id == superuser.id
    end

    test "clears invalid impersonation - missing superuser", %{conn: conn} do
      target_user = user_fixture()

      conn =
        conn
        |> put_session(:impersonating, true)
        |> put_session(:superuser_id, Ecto.UUID.generate())
        |> put_session(:target_user_id, target_user.id)
        |> UserAuth.fetch_current_scope_for_user([])

      refute get_session(conn, :impersonating)
      refute get_session(conn, :superuser_id)
      refute get_session(conn, :target_user_id)
    end

    test "clears invalid impersonation - missing target", %{conn: conn} do
      superuser = user_fixture(%{is_superuser: true})

      conn =
        conn
        |> put_session(:impersonating, true)
        |> put_session(:superuser_id, superuser.id)
        |> put_session(:target_user_id, Ecto.UUID.generate())
        |> UserAuth.fetch_current_scope_for_user([])

      refute get_session(conn, :impersonating)
      refute get_session(conn, :superuser_id)
      refute get_session(conn, :target_user_id)
    end

    test "clears invalid impersonation - missing IDs", %{conn: conn} do
      conn =
        conn
        |> put_session(:impersonating, true)
        |> UserAuth.fetch_current_scope_for_user([])

      refute get_session(conn, :impersonating)
    end
  end

  describe "start_impersonation/2" do
    test "allows superuser to impersonate regular user", %{conn: conn} do
      superuser =
        user_fixture()
        |> Ecto.Changeset.change(%{is_superuser: true})
        |> Towerops.Repo.update!()

      target_user = user_fixture()

      conn =
        conn
        |> Map.put(:remote_ip, {127, 0, 0, 1})
        |> fetch_flash()
        |> assign(:current_scope, Scope.for_user(superuser))
        |> UserAuth.start_impersonation(target_user.id)

      assert get_session(conn, :impersonating)
      assert get_session(conn, :superuser_id) == superuser.id
      assert get_session(conn, :target_user_id) == target_user.id
      assert conn.assigns.current_scope.user.id == target_user.id
      assert conn.assigns.current_scope.superuser.id == superuser.id
      assert redirected_to(conn) == ~p"/orgs"
    end

    test "prevents superuser from impersonating self", %{conn: conn} do
      superuser =
        user_fixture()
        |> Ecto.Changeset.change(%{is_superuser: true})
        |> Towerops.Repo.update!()

      conn =
        conn
        |> Map.put(:remote_ip, {127, 0, 0, 1})
        |> fetch_flash()
        |> assign(:current_scope, Scope.for_user(superuser))
        |> UserAuth.start_impersonation(superuser.id)

      # Check that the error was set
      assert Phoenix.Flash.get(conn.assigns.flash, :error) ==
               "You cannot impersonate yourself."

      assert conn.halted
    end

    test "allows superuser to impersonate other superusers", %{conn: conn} do
      superuser =
        user_fixture()
        |> Ecto.Changeset.change(%{is_superuser: true})
        |> Towerops.Repo.update!()

      other_superuser =
        user_fixture()
        |> Ecto.Changeset.change(%{is_superuser: true})
        |> Towerops.Repo.update!()

      conn =
        conn
        |> Map.put(:remote_ip, {127, 0, 0, 1})
        |> fetch_flash()
        |> assign(:current_scope, Scope.for_user(superuser))
        |> UserAuth.start_impersonation(other_superuser.id)

      # Verify impersonation was successful
      assert get_session(conn, :impersonating)
      assert get_session(conn, :superuser_id) == superuser.id
      assert get_session(conn, :target_user_id) == other_superuser.id
      assert conn.assigns.current_scope.user.id == other_superuser.id
      assert conn.assigns.current_scope.superuser.id == superuser.id
      assert redirected_to(conn) == ~p"/orgs"
    end
  end

  describe "stop_impersonation/1" do
    test "stops impersonation and restores superuser session", %{conn: conn} do
      superuser =
        user_fixture()
        |> Ecto.Changeset.change(%{is_superuser: true})
        |> Towerops.Repo.update!()

      target_user = user_fixture()

      {:ok, _organization} =
        Towerops.Organizations.create_organization(%{name: "Super Org"}, superuser.id)

      conn =
        conn
        |> Map.put(:remote_ip, {127, 0, 0, 1})
        |> fetch_flash()
        |> put_session(:impersonating, true)
        |> put_session(:superuser_id, superuser.id)
        |> put_session(:target_user_id, target_user.id)
        |> assign(:current_scope, Scope.for_impersonation(superuser, target_user))
        |> UserAuth.stop_impersonation()

      refute get_session(conn, :impersonating)
      refute get_session(conn, :superuser_id)
      refute get_session(conn, :target_user_id)
      assert conn.assigns.current_scope.user.id == superuser.id
      assert redirected_to(conn) == ~p"/devices"
    end

    test "restores superuser's organization context after stopping impersonation", %{conn: conn} do
      # Create superuser with their own organization
      superuser =
        user_fixture()
        |> Ecto.Changeset.change(%{is_superuser: true})
        |> Towerops.Repo.update!()

      {:ok, superuser_org} =
        Towerops.Organizations.create_organization(%{name: "Superuser Org"}, superuser.id)

      # Create target user with their own organization
      target_user = user_fixture()

      {:ok, target_org} =
        Towerops.Organizations.create_organization(%{name: "Target Org"}, target_user.id)

      # Simulate impersonation with target user's organization in session
      conn =
        conn
        |> Map.put(:remote_ip, {127, 0, 0, 1})
        |> fetch_flash()
        |> put_session(:impersonating, true)
        |> put_session(:superuser_id, superuser.id)
        |> put_session(:target_user_id, target_user.id)
        |> put_session(:current_organization_id, target_org.id)
        |> assign(:current_scope, Scope.for_impersonation(superuser, target_user))
        |> UserAuth.stop_impersonation()

      # Verify organization context is restored to superuser's org
      assert get_session(conn, :current_organization_id) == superuser_org.id
      assert conn.assigns.current_scope.user.id == superuser.id
      assert redirected_to(conn) == ~p"/devices"
    end

    test "redirects to /orgs when superuser has no organizations", %{conn: conn} do
      superuser =
        user_fixture()
        |> Ecto.Changeset.change(%{is_superuser: true})
        |> Towerops.Repo.update!()

      target_user = user_fixture()

      conn =
        conn
        |> Map.put(:remote_ip, {127, 0, 0, 1})
        |> fetch_flash()
        |> put_session(:impersonating, true)
        |> put_session(:superuser_id, superuser.id)
        |> put_session(:target_user_id, target_user.id)
        |> assign(:current_scope, Scope.for_impersonation(superuser, target_user))
        |> UserAuth.stop_impersonation()

      assert redirected_to(conn) == ~p"/orgs"
    end
  end

  describe "on_mount/4 - :redirect_if_user_is_authenticated" do
    test "redirects authenticated users to signed in path", %{user: user} do
      user_token = Accounts.generate_user_session_token(user)

      {:halt, socket} =
        UserAuth.on_mount(
          :redirect_if_user_is_authenticated,
          %{},
          %{"user_token" => user_token},
          %Socket{}
        )

      assert socket.redirected
    end

    test "redirects to /devices when user has organizations", %{user: user} do
      {:ok, _organization} = Towerops.Organizations.create_organization(%{name: "Test Org"}, user.id)
      user_token = Accounts.generate_user_session_token(user)

      {:halt, socket} =
        UserAuth.on_mount(
          :redirect_if_user_is_authenticated,
          %{},
          %{"user_token" => user_token},
          %Socket{}
        )

      assert socket.redirected
    end

    test "continues for unauthenticated users" do
      {:cont, socket} =
        UserAuth.on_mount(
          :redirect_if_user_is_authenticated,
          %{},
          %{},
          %Socket{}
        )

      refute socket.redirected
    end
  end

  describe "on_mount/4 - :require_authenticated_user" do
    test "allows authenticated users", %{user: user} do
      user_token = Accounts.generate_user_session_token(user)

      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      {:cont, socket} =
        UserAuth.on_mount(
          :require_authenticated_user,
          %{},
          %{"user_token" => user_token},
          socket
        )

      assert socket.assigns.current_scope.user.id == user.id
    end

    test "redirects unauthenticated users to login" do
      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      {:halt, socket} =
        UserAuth.on_mount(
          :require_authenticated_user,
          %{},
          %{},
          socket
        )

      assert socket.redirected
    end
  end

  describe "on_mount/4 - :load_current_organization" do
    test "loads organization for authenticated member", %{user: user} do
      {:ok, organization} = Towerops.Organizations.create_organization(%{name: "Test Org"}, user.id)
      user_token = Accounts.generate_user_session_token(user)

      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      socket =
        Phoenix.Component.assign_new(socket, :current_scope, fn -> Scope.for_user(user) end)

      {:cont, socket} =
        UserAuth.on_mount(
          :load_current_organization,
          %{"org_slug" => organization.slug},
          %{"user_token" => user_token},
          socket
        )

      assert socket.assigns.current_scope.organization.id == organization.id
      assert socket.assigns.current_membership.role == :owner
    end

    test "redirects non-members", %{user: user} do
      other_user = user_fixture()

      {:ok, organization} =
        Towerops.Organizations.create_organization(%{name: "Other Org"}, other_user.id)

      user_token = Accounts.generate_user_session_token(user)

      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      socket =
        Phoenix.Component.assign_new(socket, :current_scope, fn -> Scope.for_user(user) end)

      {:halt, socket} =
        UserAuth.on_mount(
          :load_current_organization,
          %{"org_slug" => organization.slug},
          %{"user_token" => user_token},
          socket
        )

      assert socket.redirected
    end

    test "redirects when organization not found", %{user: user} do
      user_token = Accounts.generate_user_session_token(user)

      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      socket =
        Phoenix.Component.assign_new(socket, :current_scope, fn -> Scope.for_user(user) end)

      {:halt, socket} =
        UserAuth.on_mount(
          :load_current_organization,
          %{"org_slug" => "non-existent"},
          %{"user_token" => user_token},
          socket
        )

      assert socket.redirected
    end

    test "continues when no org_slug in params" do
      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      {:cont, socket} =
        UserAuth.on_mount(
          :load_current_organization,
          %{},
          %{},
          socket
        )

      refute socket.redirected
    end

    test "redirects when org_slug exists but no user" do
      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      socket =
        Phoenix.Component.assign_new(socket, :current_scope, fn -> Scope.for_user(nil) end)

      {:halt, socket} =
        UserAuth.on_mount(
          :load_current_organization,
          %{"org_slug" => "test-org"},
          %{},
          socket
        )

      assert socket.redirected
    end
  end

  describe "on_mount/4 - :require_superuser" do
    test "allows superusers" do
      superuser =
        user_fixture()
        |> Ecto.Changeset.change(%{is_superuser: true})
        |> Towerops.Repo.update!()

      user_token = Accounts.generate_user_session_token(superuser)

      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      {:cont, socket} =
        UserAuth.on_mount(
          :require_superuser,
          %{},
          %{"user_token" => user_token},
          socket
        )

      assert socket.assigns.current_scope.user.id == superuser.id
    end

    test "redirects regular users", %{user: user} do
      user_token = Accounts.generate_user_session_token(user)

      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      {:halt, socket} =
        UserAuth.on_mount(
          :require_superuser,
          %{},
          %{"user_token" => user_token},
          socket
        )

      assert socket.redirected
    end

    test "redirects unauthenticated users" do
      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      {:halt, socket} =
        UserAuth.on_mount(
          :require_superuser,
          %{},
          %{},
          socket
        )

      assert socket.redirected
    end
  end

  describe "on_mount/4 - :require_sudo_mode" do
    test "redirects to sudo verify when sudo mode expired and TOTP enabled" do
      user = user_fixture()

      # Create TOTP device
      {:ok, _device, _secret} =
        Accounts.create_totp_device(user.id, "Test Device", NimbleTOTP.secret())

      # Create session with user token
      token = Accounts.generate_user_session_token(user)
      session = %{"user_token" => token}

      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      assert {:halt, redirected_socket} =
               UserAuth.on_mount(:require_sudo_mode, %{}, session, socket)

      assert Phoenix.Flash.get(redirected_socket.assigns.flash, :error) =~ "verify your identity"
    end

    test "redirects to TOTP enrollment when sudo mode expired and no TOTP" do
      user = user_fixture(enable_totp: false)

      # Create session with user token
      token = Accounts.generate_user_session_token(user)
      session = %{"user_token" => token}

      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      assert {:halt, redirected_socket} =
               UserAuth.on_mount(:require_sudo_mode, %{}, session, socket)

      assert Phoenix.Flash.get(redirected_socket.assigns.flash, :error) =~ "Two-factor authentication"
    end

    test "allows access when sudo mode is active" do
      user = user_fixture()
      {:ok, user} = Accounts.grant_sudo_mode(user)

      # Create session with user token
      token = Accounts.generate_user_session_token(user)
      session = %{"user_token" => token}

      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      assert {:cont, _socket} = UserAuth.on_mount(:require_sudo_mode, %{}, session, socket)
    end

    test "redirects unauthenticated users" do
      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      socket =
        Phoenix.Component.assign_new(socket, :current_scope, fn -> Scope.for_user(nil) end)

      {:halt, result_socket} =
        UserAuth.on_mount(
          :require_sudo_mode,
          %{},
          %{},
          socket
        )

      assert result_socket.redirected
    end
  end

  describe "on_mount/4 - :load_default_organization" do
    test "loads organization from session for authenticated user", %{user: user} do
      {:ok, organization} = Towerops.Organizations.create_organization(%{name: "Test Org"}, user.id)

      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      socket =
        Phoenix.Component.assign_new(socket, :current_scope, fn -> Scope.for_user(user) end)

      {:cont, result_socket} =
        UserAuth.on_mount(
          :load_default_organization,
          %{},
          %{"current_organization_id" => organization.id},
          socket
        )

      assert result_socket.assigns.current_scope.organization.id == organization.id
      assert result_socket.assigns.current_membership
    end

    test "loads first organization when no org_id in session", %{user: user} do
      {:ok, organization} = Towerops.Organizations.create_organization(%{name: "Test Org"}, user.id)

      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      socket =
        Phoenix.Component.assign_new(socket, :current_scope, fn -> Scope.for_user(user) end)

      {:cont, result_socket} =
        UserAuth.on_mount(
          :load_default_organization,
          %{},
          %{},
          socket
        )

      assert result_socket.assigns.current_scope.organization.id == organization.id
      assert result_socket.assigns.current_membership
    end

    test "halts when organization not found", %{user: user} do
      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      socket =
        Phoenix.Component.assign_new(socket, :current_scope, fn -> Scope.for_user(user) end)

      {:halt, result_socket} =
        UserAuth.on_mount(
          :load_default_organization,
          %{},
          %{"current_organization_id" => Ecto.UUID.generate()},
          socket
        )

      assert result_socket.redirected
    end

    test "halts when user has no organizations", %{user: user} do
      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      socket =
        Phoenix.Component.assign_new(socket, :current_scope, fn -> Scope.for_user(user) end)

      {:halt, result_socket} =
        UserAuth.on_mount(
          :load_default_organization,
          %{},
          %{},
          socket
        )

      assert result_socket.redirected
    end

    test "halts when user is not a member of organization", %{user: user} do
      other_user = user_fixture()
      {:ok, organization} = Towerops.Organizations.create_organization(%{name: "Other Org"}, other_user.id)

      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      socket =
        Phoenix.Component.assign_new(socket, :current_scope, fn -> Scope.for_user(user) end)

      {:halt, result_socket} =
        UserAuth.on_mount(
          :load_default_organization,
          %{},
          %{"current_organization_id" => organization.id},
          socket
        )

      assert result_socket.redirected
    end

    test "continues when user is not authenticated" do
      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      socket =
        Phoenix.Component.assign_new(socket, :current_scope, fn -> Scope.for_user(nil) end)

      {:cont, result_socket} =
        UserAuth.on_mount(
          :load_default_organization,
          %{},
          %{},
          socket
        )

      refute result_socket.redirected
    end
  end

  describe "store_return_to_for_liveview/2" do
    test "stores GET path when no existing return_to", %{conn: conn} do
      conn =
        UserAuth.store_return_to_for_liveview(
          %{conn | request_path: "/devices", method: "GET", path_info: ["devices"], query_string: ""},
          []
        )

      assert get_session(conn, :user_return_to) == "/devices"
    end

    test "overwrites existing return_to with new path", %{conn: conn} do
      conn =
        conn
        |> put_session(:user_return_to, "/original")
        |> Map.put(:request_path, "/new")
        |> Map.put(:path_info, ["new"])
        |> Map.put(:query_string, "")
        |> Map.put(:method, "GET")
        |> UserAuth.store_return_to_for_liveview([])

      assert get_session(conn, :user_return_to) == "/new"
    end

    test "does not store POST requests", %{conn: conn} do
      conn = UserAuth.store_return_to_for_liveview(%{conn | request_path: "/devices", method: "POST"}, [])

      refute get_session(conn, :user_return_to)
    end

    test "does not store login path", %{conn: conn} do
      conn = UserAuth.store_return_to_for_liveview(%{conn | request_path: "/users/log-in", method: "GET"}, [])

      refute get_session(conn, :user_return_to)
    end

    test "does not store register path", %{conn: conn} do
      conn = UserAuth.store_return_to_for_liveview(%{conn | request_path: "/users/register", method: "GET"}, [])

      refute get_session(conn, :user_return_to)
    end

    test "does not store reset password path", %{conn: conn} do
      conn = UserAuth.store_return_to_for_liveview(%{conn | request_path: "/users/reset-password", method: "GET"}, [])

      refute get_session(conn, :user_return_to)
    end

    test "does not store confirm path", %{conn: conn} do
      conn = UserAuth.store_return_to_for_liveview(%{conn | request_path: "/users/confirm", method: "GET"}, [])

      refute get_session(conn, :user_return_to)
    end

    test "does not store dev paths", %{conn: conn} do
      conn = UserAuth.store_return_to_for_liveview(%{conn | request_path: "/dev/mailbox", method: "GET"}, [])

      refute get_session(conn, :user_return_to)
    end

    test "does not store asset paths", %{conn: conn} do
      conn = UserAuth.store_return_to_for_liveview(%{conn | request_path: "/assets/app.css", method: "GET"}, [])

      refute get_session(conn, :user_return_to)
    end

    test "does not store health check paths", %{conn: conn} do
      conn = UserAuth.store_return_to_for_liveview(%{conn | request_path: "/health", method: "GET"}, [])

      refute get_session(conn, :user_return_to)
    end
  end

  describe "log_out_user/1 with live_socket_id" do
    test "broadcasts disconnect when live_socket_id exists", %{conn: conn, user: user} do
      user_token = Accounts.generate_user_session_token(user)
      live_socket_id = "users_sessions:#{user.id}"

      conn =
        conn
        |> put_session(:user_token, user_token)
        |> put_session(:live_socket_id, live_socket_id)
        |> fetch_cookies()

      # Subscribe to the topic to verify broadcast
      ToweropsWeb.Endpoint.subscribe(live_socket_id)

      conn = UserAuth.log_out_user(conn)

      # Verify broadcast was sent
      assert_receive %Phoenix.Socket.Broadcast{
        topic: ^live_socket_id,
        event: "disconnect"
      }

      refute get_session(conn, :user_token)
      assert redirected_to(conn) == ~p"/users/log-in"
    end
  end

  describe "redirect_if_user_is_authenticated/2 with organizations" do
    test "redirects to /devices when user has organizations", %{conn: conn, user: user} do
      {:ok, _organization} = Towerops.Organizations.create_organization(%{name: "Test Org"}, user.id)

      conn =
        conn
        |> assign(:current_scope, Scope.for_user(user))
        |> UserAuth.redirect_if_user_is_authenticated([])

      assert conn.halted
      assert redirected_to(conn) == ~p"/devices"
    end
  end

  describe "mount_current_scope/2 timezone handling" do
    test "uses user's timezone when set", %{user: user} do
      user =
        user
        |> Ecto.Changeset.change(timezone: "America/New_York")
        |> Towerops.Repo.update!()

      user_token = Accounts.generate_user_session_token(user)

      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      {:cont, result_socket} =
        UserAuth.on_mount(
          :require_authenticated_user,
          %{},
          %{"user_token" => user_token},
          socket
        )

      assert result_socket.assigns.timezone == "America/New_York"
    end

    test "defaults to UTC when user has no timezone", %{user: user} do
      user_token = Accounts.generate_user_session_token(user)

      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      {:cont, result_socket} =
        UserAuth.on_mount(
          :require_authenticated_user,
          %{},
          %{"user_token" => user_token},
          socket
        )

      # When user has no timezone and no connect_params, defaults to UTC
      assert result_socket.assigns.timezone == "UTC"
    end

    test "defaults to UTC when not authenticated" do
      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      {:halt, result_socket} =
        UserAuth.on_mount(
          :require_authenticated_user,
          %{},
          %{},
          socket
        )

      # Unauthenticated users also get UTC as default
      assert result_socket.assigns.timezone == "UTC"
    end
  end

  describe "fetch_current_scope_for_user/2 edge cases" do
    test "assigns nil scope when no token in session or cookies", %{conn: conn} do
      conn =
        conn
        |> fetch_cookies()
        |> UserAuth.fetch_current_scope_for_user([])

      assert Map.has_key?(conn.assigns, :current_scope)
      assert conn.assigns[:current_scope] == nil || conn.assigns.current_scope.user == nil
    end
  end

  describe "on_mount/4 impersonation session building" do
    test "builds impersonation scope from session" do
      superuser = user_fixture(%{is_superuser: true})
      target_user = user_fixture()

      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      {:cont, result_socket} =
        UserAuth.on_mount(
          :require_authenticated_user,
          %{},
          %{
            "impersonating" => true,
            "superuser_id" => superuser.id,
            "target_user_id" => target_user.id
          },
          socket
        )

      assert result_socket.assigns.current_scope.user.id == target_user.id
      assert result_socket.assigns.current_scope.superuser.id == superuser.id
    end

    test "clears impersonation when superuser not found" do
      target_user = user_fixture()

      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      {:halt, result_socket} =
        UserAuth.on_mount(
          :require_authenticated_user,
          %{},
          %{
            "impersonating" => true,
            "superuser_id" => Ecto.UUID.generate(),
            "target_user_id" => target_user.id
          },
          socket
        )

      assert result_socket.redirected
    end

    test "clears impersonation when target user not found" do
      superuser = user_fixture(%{is_superuser: true})

      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      {:halt, result_socket} =
        UserAuth.on_mount(
          :require_authenticated_user,
          %{},
          %{
            "impersonating" => true,
            "superuser_id" => superuser.id,
            "target_user_id" => Ecto.UUID.generate()
          },
          socket
        )

      assert result_socket.redirected
    end

    test "clears impersonation when missing IDs" do
      socket = %Socket{assigns: %{__changed__: %{}, flash: %{}}}

      {:halt, result_socket} =
        UserAuth.on_mount(
          :require_authenticated_user,
          %{},
          %{"impersonating" => true},
          socket
        )

      assert result_socket.redirected
    end
  end

  describe "log_in_user/3 with return_to" do
    test "uses user_return_to for redirect and clears it from session", %{conn: conn, user: user} do
      conn =
        conn
        |> put_session(:user_return_to, "/devices")
        |> UserAuth.log_in_user(user)

      assert redirected_to(conn) == "/devices"
      # The return_to is used for redirect but cleared from session to allow new paths to be stored
      assert get_session(conn, :user_return_to) == nil
    end

    test "does not clear session when already logged in with same user", %{conn: conn, user: user} do
      # First login
      conn = UserAuth.log_in_user(conn, user)
      token = get_session(conn, :user_token)

      # Re-login with same user (simulating session renewal)
      conn =
        conn
        |> recycle()
        |> Map.replace!(:secret_key_base, ToweropsWeb.Endpoint.config(:secret_key_base))
        |> init_test_session(%{user_token: token})
        |> assign(:current_scope, Scope.for_user(user))
        |> put_session(:test_data, "should_persist")
        |> UserAuth.log_in_user(user)

      # Session data should persist when re-authenticating with same user
      assert get_session(conn, :test_data) == "should_persist"
    end

    test "ignores invalid return_to paths and uses default", %{conn: conn, user: user} do
      # Asset paths should be ignored
      conn =
        conn
        |> put_session(:user_return_to, "/assets/app.css")
        |> UserAuth.log_in_user(user)

      assert redirected_to(conn) == ~p"/orgs"

      # Dev paths should be ignored
      conn =
        conn
        |> recycle()
        |> Map.replace!(:secret_key_base, ToweropsWeb.Endpoint.config(:secret_key_base))
        |> init_test_session(%{})
        |> put_session(:user_return_to, "/dev/mailbox")
        |> UserAuth.log_in_user(user)

      assert redirected_to(conn) == ~p"/orgs"

      # Auth paths should be ignored
      conn =
        conn
        |> recycle()
        |> Map.replace!(:secret_key_base, ToweropsWeb.Endpoint.config(:secret_key_base))
        |> init_test_session(%{})
        |> put_session(:user_return_to, "/users/reset-password/token123")
        |> UserAuth.log_in_user(user)

      assert redirected_to(conn) == ~p"/orgs"
    end

    test "ignores stale mailbox asset paths (regression test)", %{conn: conn, user: user} do
      # This is the exact path that was causing the bug
      conn =
        conn
        |> put_session(:user_return_to, "/dev/mailbox/assets/app.css")
        |> UserAuth.log_in_user(user)

      assert redirected_to(conn) == ~p"/orgs"
      assert get_session(conn, :user_return_to) == nil
    end
  end

  describe "property-based tests" do
    property "store_return_to_for_liveview always stores valid paths for GET requests", %{conn: conn} do
      check all(
              path <- string(:alphanumeric, min_length: 1, max_length: 50),
              query <- one_of([constant(""), string(:alphanumeric, min_length: 1, max_length: 20)])
            ) do
        path = "/" <> path
        path_info = String.split(path, "/", trim: true)

        conn =
          UserAuth.store_return_to_for_liveview(
            %{conn | request_path: path, method: "GET", path_info: path_info, query_string: query},
            []
          )

        stored_path = get_session(conn, :user_return_to)

        if String.starts_with?(path, "/users/log-in") or String.starts_with?(path, "/users/register") or
             String.starts_with?(path, "/users/reset-password") or
             String.starts_with?(path, "/users/confirm") do
          refute stored_path
        else
          assert stored_path
          assert String.starts_with?(stored_path, "/")
        end
      end
    end

    property "fetch_current_scope_for_user always assigns a scope", %{conn: conn} do
      check all(has_token <- boolean()) do
        conn =
          if has_token do
            user = user_fixture(%{authenticated_at: DateTime.utc_now(:second)})
            token = Accounts.generate_user_session_token(user)
            put_session(conn, :user_token, token)
          else
            conn
          end

        conn = UserAuth.fetch_current_scope_for_user(conn, [])

        assert Map.has_key?(conn.assigns, :current_scope)
      end
    end

    property "redirect paths are always valid for authenticated users", %{user: user} do
      check all(has_org <- boolean(), max_runs: 10) do
        if has_org do
          {:ok, _org} = Towerops.Organizations.create_organization(%{name: "Test Org"}, user.id, bypass_limits: true)
        end

        # Reload user to get fresh org data
        user = Towerops.Repo.reload(user)

        conn =
          build_conn()
          |> Map.replace!(:secret_key_base, ToweropsWeb.Endpoint.config(:secret_key_base))
          |> init_test_session(%{})
          |> assign(:current_scope, Scope.for_user(user))
          |> UserAuth.redirect_if_user_is_authenticated([])

        assert conn.halted
        redirect_path = redirected_to(conn)
        assert redirect_path in [~p"/orgs", ~p"/devices"]
      end
    end
  end
end