/* ==========================================================================================
   Purpose: Hide "Login" and show "Account" when a Keycloak SSO session exists,
            wire login/logout clicks to the Keycloak adapter, and keep state fresh.
   NOTE: Ensure CSP allows {{ OIDC.URL }} for script-src-elem, connect-src, and frame-src.
   ========================================================================================== */

/* =======================
   1) Configuration (filled by Jinja/Ansible)
   ======================= */
const KC_CONFIG = {
  url: "{{ OIDC.URL }}",                 // e.g. https://auth.{{ SOFTWARE_DOMAIN }}
  realm: "{{ OIDC.CLIENT.REALM }}",      // e.g. cymais.cloud
  clientId: "{{ OIDC.CLIENT.ID }}",      // e.g. cymais.cloud
  redirectUri: "{{ DASHBOARD_APP_BASE_URL }}",   // canonical app URL for login/logout round-trips
  silentCheckSsoRedirectUri: "{{ (DASHBOARD_APP_BASE_URL | regex_replace('/+$', '')) ~ DASHBOARD_LOCATION_SILENT_CHECK }}"
};

{% set _oidc_tor_enabled = lookup('config', application_id, 'services.tor.enabled', False) | bool %}
{% if _oidc_tor_enabled %}
{% set _oidc_tor_node = lookup('config', 'svc-net-tor', 'services.tor.node', '') %}
{% set _oidc_mirror_onion = lookup('tls', 'web-svc-mirror', 'url.base') | regex_replace('/+$', '') | to_onion_url(_oidc_tor_node, DOMAIN_PRIMARY) %}
const KC_MIRROR_BASE = "{{ _oidc_mirror_onion }}";
{% else %}
const KC_MIRROR_BASE = null;
{% endif %}
const KC_JS_ASSET_URL = "{{ lookup('asset', application_id, 'keycloak-js', 'lib/keycloak.js') }}";

const DEBUG = {{ MODE_DEBUG | string | lower }};
// Keycloak's hidden session-status iframe is noisy on newer Chromium builds and
// collides with dashboard-embedded OIDC flows. We keep explicit init/redirect
// handling plus token refresh below, so hidden iframe polling can stay off.
const KEYCLOAK_IFRAME_POLLING_ENABLED = false;

/* ==============================================
   2) Helpers for menu manipulation
   ============================================== */
function normalizedLabel(el) {
  return (el?.getAttribute?.("data-label") || el?.ariaLabel || el?.title || el?.textContent || "")
    .replace(/\s+/g, " ").trim().toLowerCase();
}

function findMenuItemByText(label) {
  const wanted = (label || "").trim().toLowerCase();
  if (!wanted) return null;

  const nodes = document.querySelectorAll(
    "nav a, nav button, nav .nav-link, nav .dropdown-toggle, nav .dropdown-item, .navbar a, .navbar button"
  );

  for (const el of nodes) {
    const text = (el.getAttribute?.("data-label") || el.ariaLabel || el.title || el.textContent || "")
      .replace(/\s+/g, " ").trim().toLowerCase();
    if (text !== wanted) continue;

    const container =
      el.closest("li, .nav-item, .dropdown, .btn-group, .menu-item") ||
      el.closest(".navbar-nav > *") ||
      el.parentElement ||
      el;
    return container;
  }
  return null;
}


function setItemVisible(el, visible) {
  if (!el) return;
  el.style.display = visible ? "" : "none";
  if (el.toggleAttribute) el.toggleAttribute("hidden", !visible);
  el.setAttribute?.("aria-hidden", visible ? "false" : "true");
}

/* ==============================================
   3) Dynamically load the Keycloak.js adapter
   ============================================== */
async function loadKeycloakAdapter(src) {
  const mod = await import(src);
  if (typeof mod.default !== "function") {
    throw new Error("keycloak.js exposed no default export at " + src);
  }
  return mod.default;
}

/* ==============================================
   4) UI logic: toggle Account/Login visibility
   ============================================== */
let keycloak = null;
let authenticated = false;

function applyAuthMenuVisibility(authenticated) {
  try {
    const accountItem = findMenuItemByText("Account");
    const loginItem   = findMenuItemByText("Login");
    setItemVisible(accountItem, !!authenticated);
    setItemVisible(loginItem,   !authenticated);
    if (DEBUG) console.log("[oidc] applyAuthMenuVisibility:", { authenticated, accountItem, loginItem });
  } catch (e) {
    console.warn("[oidc] applyAuthMenuVisibility failed:", e);
  }
}

function syncAuthMenuVisibility(nextAuthenticated) {
  authenticated = !!nextAuthenticated;
  applyAuthMenuVisibility(authenticated);
}

function wireLoginLogoutClicks() {
  const loginItem  = findMenuItemByText("Login");
  const logoutItem = findMenuItemByText("Logout"); // child under "Account"
  const loginA     = loginItem?.querySelector("a,button");
  const logoutA    = logoutItem?.querySelector("a,button");

  // Intercept login click to use the adapter (gracefully falls back to href if adapter failed)
  loginA?.addEventListener("click", (ev) => {
    try {
      if (keycloak) {
        ev.preventDefault();
        keycloak.login({ redirectUri: KC_CONFIG.redirectUri });
        if (DEBUG) console.log("[oidc] login clicked → keycloak.login()");
      }
    } catch (e) {
      console.warn("[oidc] login handler error:", e);
    }
  }, { capture: true });

  // Intercept logout click
  logoutA?.addEventListener("click", (ev) => {
    try {
      if (keycloak) {
        ev.preventDefault();
        keycloak.logout({ redirectUri: KC_CONFIG.redirectUri });
        if (DEBUG) console.log("[oidc] logout clicked → keycloak.logout()");
      }
    } catch (e) {
      console.warn("[oidc] logout handler error:", e);
    }
  }, { capture: true });
}

/* ==============================================
   5) Initialize Keycloak with silent SSO check
   ============================================== */
async function initAuthUI() {
  // Default UI state until we know better
  syncAuthMenuVisibility(false);

  const kcJsUrl = (KC_MIRROR_BASE && window.location.hostname.endsWith(".onion") && KC_JS_ASSET_URL.startsWith("https://"))
    ? KC_MIRROR_BASE + "/" + KC_JS_ASSET_URL.replace(/^https:\/\//, "")
    : KC_JS_ASSET_URL;
  let Keycloak;
  try {
    Keycloak = await loadKeycloakAdapter(kcJsUrl);
  } catch (e) {
    console.error("[oidc] Failed to load adapter:", e);
    return; // nothing else to do
  }

  // Initialize the Keycloak instance
  try {
    keycloak = new Keycloak({ url: KC_CONFIG.url, realm: KC_CONFIG.realm, clientId: KC_CONFIG.clientId });
    keycloak.onReady = (nextAuthenticated) => syncAuthMenuVisibility(nextAuthenticated);
    keycloak.onAuthSuccess = () => syncAuthMenuVisibility(true);
    keycloak.onAuthLogout = () => syncAuthMenuVisibility(false);
    keycloak.onAuthRefreshSuccess = () => syncAuthMenuVisibility(true);
    keycloak.onAuthRefreshError = () => syncAuthMenuVisibility(false);

    const hasAuthCode = /\bcode=/.test(window.location.search);
    const onLoadMode = hasAuthCode ? "login-required" : "check-sso";

    authenticated = await keycloak.init({
      onLoad: onLoadMode,
      pkceMethod: "S256",
      silentCheckSsoRedirectUri: KC_CONFIG.silentCheckSsoRedirectUri,
      checkLoginIframe: KEYCLOAK_IFRAME_POLLING_ENABLED,
      tokenMinValid: 30
    });
  } catch (e) {
    console.error("[oidc] Keycloak init failed:", e);
  }

  syncAuthMenuVisibility(authenticated);
  wireLoginLogoutClicks();
  // Persona-helper readiness contract — flag name SPOT is
  // `OIDC_LOGIN_READY_FLAG` in
  // `roles/test-e2e-playwright/files/personas/utils/keycloak.js`.
  // Must stay in sync with that constant.
  window.__oidcLoginReady = true;

  // Schedule token refresh only if we are authenticated
  async function scheduleRefresh() {
    if (!keycloak?.tokenParsed?.exp) return;
    const now = Math.floor(Date.now() / 1000);
    const exp = keycloak.tokenParsed.exp;
    const refreshInMs = Math.max((exp - now - 30), 1) * 1000;

    setTimeout(async () => {
      try {
        const ok = await keycloak.updateToken(60); // refresh if <60s valid
        syncAuthMenuVisibility(!!ok || !!keycloak?.authenticated);
        if (DEBUG) console.log("[oidc] token refresh → ok:", ok);
      } catch (e) {
        console.warn("[oidc] token refresh failed:", e);
        syncAuthMenuVisibility(false);
      }
      scheduleRefresh();
    }, refreshInMs);
  }
  if (authenticated) scheduleRefresh();

  // Re-apply if the navbar is re-rendered dynamically
  const navbar = document.querySelector("nav.navbar") || document.querySelector(".navbar") || document.querySelector("nav");
  if (navbar && "MutationObserver" in window) {
    new MutationObserver(() => syncAuthMenuVisibility(!!keycloak?.authenticated || authenticated))
      .observe(navbar, { childList: true, subtree: true });
  }

  if (DEBUG) {
    console.log("[oidc] init done", {
      authenticated,
      kcJsUrl,
      checkLoginIframe: KEYCLOAK_IFRAME_POLLING_ENABLED,
      silentCheckSsoRedirectUri: KC_CONFIG.silentCheckSsoRedirectUri
    });
  }
}

/* ==============================================
   6) Start when DOM is ready
   ============================================== */
if (document.readyState === "loading") {
  document.addEventListener("DOMContentLoaded", initAuthUI, { once: true });
} else {
  // If script is injected after DOMContentLoaded (e.g., via runtime loader), run immediately
  initAuthUI();
}

/* ==========================================================================================
   NOTE: You must provide a file {{ DASHBOARD_LOCATION_SILENT_CHECK }} at your web root, e.g.:

   <!DOCTYPE html><html><body>Silent SSO</body></html>

   This file is loaded in an invisible iframe by Keycloak to check login state.
   Also ensure CSP allows {{ OIDC.URL }} in script-src-elem, connect-src, and frame-src.
   ========================================================================================== */