/*!
 * Nuva Product Recommendation — Live Integration (Phase 6C, ADVANCED FLOW)
 * ---------------------------------------------------------------------------
 * PURPOSE
 *   Wires the already-built, already-tested Phase 6A matching engine and
 *   Phase 6B product recommendation system into the LIVE "Advanced Skin
 *   Scan" results page (/ai-skin-scan/, WordPress page 199, customer-facing
 *   title "Advanced Skin Scan").
 *
 *   Unlike the Free flow's Phase 3B script, the Advanced flow's Phase 5D
 *   "Results UI" script does not pre-declare a product placeholder
 *   container - it renders a single HTML string
 *   (renderNormalResults()/renderSafetyResults()) directly into its mount
 *   element (#nuvaAdvancedScanRoot) as one atomic innerHTML assignment. This
 *   file therefore observes that mount element the same non-invasive way
 *   Phase 5D itself observes Phase 5A (see Phase 5D's own patchSubmit()
 *   comment: "Isolated module... without editing a single line of the
 *   [earlier] source file") and appends its own container once real
 *   (non-safety) results are present - it never edits Phase 5D's source.
 *
 * REQUIRED LOAD ORDER on this page (all already present except the last two):
 *   1. Phase 5A  - Advanced Skin Scan questionnaire
 *   2. Phase 5B  - Advanced assessment engine         (window.NuvaAdvancedAssessmentEngine)
 *   3. Phase 5C  - Advanced ingredient recommendation (window.NuvaAdvancedIngredientRecommendationEngine)
 *   4. Phase 5D  - Advanced "Results UI"              (window.NuvaAdvancedResultsUI)
 *   5. Phase 6A  - Product matching engine            (window.NuvaProductMatchingEngine)   [ADDED]
 *   6. Phase 6B  - Product catalog admin              (window.NuvaProductCatalogAdmin)      [ADDED]
 *   7. Phase 6B  - Product recommendation UI          (window.NuvaProductRecommendationUI)  [ADDED]
 *   8. Phase 6B  - Product detail UI                  (window.NuvaProductDetailUI)           [ADDED]
 *   9. Phase 6B  - Cart                                (window.NuvaCart)                     [ADDED]
 *  10. Phase 6B  - Checkout foundation                 (window.NuvaCheckout)                 [ADDED]
 *  11. THIS FILE - Advanced flow integration glue                                             [ADDED]
 *
 *   NOTE: nuva_dev_placeholder_products.js is intentionally NOT loaded on
 *   this live page, for the same reason as the Free flow (see the Free
 *   integration file's header comment).
 *
 * ASSESSMENT / RECOMMENDATION SOURCE
 *   Uses ONLY the existing, published, public methods that Phase 5D's own
 *   internal resolveAssessment()/resolveRecommendation() helpers use
 *   (confirmed from the live Phase 5D source):
 *     window.NuvaAdvancedAssessmentEngine.runAdvancedAssessment() (falls
 *       back to .loadAdvancedAssessment())
 *     window.NuvaAdvancedIngredientRecommendationEngine.runAdvancedRecommendation()
 *       (falls back to .loadAdvancedRecommendation())
 *   Both "run" methods are side-effect-limited: they only (re)compute from
 *   whatever completed submission is already stored, and are safe to call
 *   more than once (Phase 5B/5C's own documented behavior) - this file does
 *   not add any new computation of its own.
 *
 * SAFETY
 *   Phase 5D's own renderSafetyResults() path never includes primaryDirection
 *   / supportingDirections / ingredientGuidance / routineGuidance, and this
 *   file additionally never even attempts to find or create a product
 *   container when a ".nar-safety-shell" element is present in the results -
 *   the safety-results render stays 100% product-free, on top of (not
 *   instead of) NuvaProductCatalogAdmin's own unconditional safety-first
 *   check inside getRecommendations().
 *
 * WHAT THIS FILE DOES NOT DO
 *   - Does not modify nuva_product_matching_engine.js, the Advanced
 *     assessment engine, or the Advanced ingredient recommendation engine.
 *   - Does not modify the Phase 5D Results UI script's source.
 *   - Does not re-implement product cards, product detail, cart, or
 *     checkout.
 *   - Does not add a product-count limit of any kind.
 */
(function (root, document) {
  'use strict';

  var MOUNT_ID = 'nuvaAdvancedScanRoot';
  var CONTAINER_ID = 'nuvaAdvancedProductRecommendations';
  var DONE_ATTR = 'data-nuva-6c-integrated';
  var STYLE_ID = 'nuvaProductRecommendationStyles';

  /**
   * Identical stylesheet to the Free flow's integration file (see that
   * file's header comment for rationale) - kept as a literal duplicate
   * rather than a shared import so each page remains a single,
   * self-contained set of <script> tags with no new build/loader step.
   */
  var STYLE_CSS = '#nuvaAdvancedProductRecommendations{margin-top:24px}' +
    '.nuva-recommend__heading{font-size:1.25rem;margin:0 0 8px;font-family:inherit}' +
    '.nuva-recommend__supporting,.nuva-recommend__message{color:#5b665f;margin:0 0 16px;font-size:0.95rem}' +
    '.nuva-recommend__grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px;margin:0}' +
    '.nuva-product-card{border:1px solid #ece7db;border-radius:12px;padding:14px;display:flex;flex-direction:column;background:#fff;box-sizing:border-box}' +
    '.nuva-product-card__image{width:100%;height:160px;object-fit:cover;border-radius:8px;margin-bottom:10px;background:#f4f1ea}' +
    '.nuva-product-card__name{font-size:1rem;margin:0 0 4px;font-family:inherit}' +
    '.nuva-product-card__category,.nuva-product-card__desc,.nuva-product-card__ingredients,.nuva-product-card__why,.nuva-product-card__usage{font-size:0.85rem;color:#5b665f;margin:0 0 6px;line-height:1.4}' +
    '.nuva-product-card__price{font-weight:600;margin:6px 0;color:#1f3a2e}' +
    '.nuva-product-card__availability{font-size:0.8rem;color:#8a9089;margin:0 0 10px}' +
    '.nuva-product-card__actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto}' +
    '.nuva-product-card__view-btn,.nuva-product-card__cta,.nuva-recommend__view-more{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 16px;border-radius:8px;font-size:0.9rem;text-decoration:none;cursor:pointer;box-sizing:border-box;font-family:inherit}' +
    '.nuva-product-card__view-btn{border:1px solid #b7572f;color:#b7572f;background:#fff;flex:1 1 auto}' +
    '.nuva-product-card__cta{border:none;background:#b7572f;color:#fff;flex:1 1 auto}' +
    '.nuva-product-card__cta[aria-disabled="true"]{background:#ccc;cursor:not-allowed}' +
    '.nuva-recommend__view-more{border:1px solid #b7572f;color:#b7572f;background:#fff;margin-top:16px;width:100%}' +
    '@media (max-width:480px){.nuva-product-card__actions{flex-direction:column}}';

  function ensureStyles() {
    if (document.getElementById(STYLE_ID)) return;
    var style = document.createElement('style');
    style.id = STYLE_ID;
    style.textContent = STYLE_CSS;
    document.head.appendChild(style);
  }

  function ready(fn) {
    if (document.readyState === 'loading') {
      document.addEventListener('DOMContentLoaded', fn);
    } else {
      fn();
    }
  }

  function findMountEl() {
    return document.getElementById(MOUNT_ID);
  }

  /**
   * Mirrors Phase 5D's own internal resolveAssessment() exactly, using only
   * the engine's published public methods.
   */
  function getAssessment() {
    var AE = root.NuvaAdvancedAssessmentEngine;
    if (!AE) return null;
    if (typeof AE.runAdvancedAssessment === 'function') {
      var live = AE.runAdvancedAssessment();
      if (live) return live;
    }
    if (typeof AE.loadAdvancedAssessment === 'function') return AE.loadAdvancedAssessment();
    return null;
  }

  /**
   * Mirrors Phase 5D's own internal resolveRecommendation() exactly, using
   * only the engine's published public methods.
   */
  function getRecommendation() {
    var RE = root.NuvaAdvancedIngredientRecommendationEngine;
    if (!RE) return null;
    if (typeof RE.runAdvancedRecommendation === 'function') {
      var live = RE.runAdvancedRecommendation();
      if (live) return live;
    }
    if (typeof RE.loadAdvancedRecommendation === 'function') return RE.loadAdvancedRecommendation();
    return null;
  }

  function ensureContainer(narRoot) {
    var el = narRoot.querySelector('#' + CONTAINER_ID);
    if (!el) {
      el = document.createElement('div');
      el.id = CONTAINER_ID;
      narRoot.appendChild(el);
    }
    return el;
  }

  function tryRender() {
    var mountEl = findMountEl();
    if (!mountEl) return false; // not the Advanced Skin Scan page

    var narRoot = mountEl.querySelector('.nar-root');
    if (!narRoot) return false; // results not rendered yet - keep watching

    if (narRoot.getAttribute(DONE_ATTR) === 'true') return true; // already handled for this render pass

    if (narRoot.querySelector('.nar-safety-shell')) {
      // Safety path: this results render must stay 100% product-free.
      // Mark handled and stop - never look for or create a product
      // container here.
      narRoot.setAttribute(DONE_ATTR, 'true');
      return true;
    }

    var admin = root.NuvaProductCatalogAdmin;
    var ui = root.NuvaProductRecommendationUI;
    if (!admin || !ui) return false; // Phase 6B scripts not loaded yet - keep watching

    var assessment = getAssessment();
    var recommendation = getRecommendation();
    if (!assessment || !recommendation) return false; // not available yet - keep watching

    ensureStyles();
    var container = ensureContainer(narRoot);
    narRoot.setAttribute(DONE_ATTR, 'true');
    ui.renderRecommendationSection(container, assessment, recommendation);
    return true;
  }

  function init() {
    if (tryRender()) return;

    if (typeof MutationObserver === 'undefined') return;
    var observer = new MutationObserver(function () {
      if (tryRender()) observer.disconnect();
    });
    observer.observe(document.body, { childList: true, subtree: true });
  }

  ready(init);
})(typeof window !== 'undefined' ? window : this, document);