/**
 * Switch Image Fetcher — Playwright edition for bot-blocked vendors
 *
 * Vendors that reject plain HTTP bots (403/406) or require JS rendering:
 *   Arista (HTTP 406), Dell (HTTP 403), Edgecore (HTTP 403),
 *   Fortinet (JS-rendered), HPE/Aruba (HTTP 403), Extreme Networks (no static URLs),
 *   Nokia, Huawei, NVIDIA, Netgear, Ciena, Moxa, D-Link, Alcatel-Lucent Enterprise,
 *   Asterfusion, Brocade, UfiSpace, QCT
 *
 * Strategy:
 *   1. Query switches without image_url for JS-blocked vendors
 *   2. Open each product page in headless Chromium (stealth mode)
 *   3. Extract og:image (or fallback: first large product <img>)
 *   4. Apply same isGenericImage() filter as the plain HTTP fetcher
 *   5. Write image_url + product_page_url to switches table
 *
 * Rate limit: maxConcurrency=1, 4s delay between requests.
 * Run: npx tsx src/scrapers/switch-image-playwright.ts [--vendor=arista]
 */

import { PlaywrightCrawler } from "crawlee";
import { pool } from "../utils/db";
import { makeCrawleeConfig } from "../utils/crawlee-config";

// ── Stealth headers injected into every page ─────────────────────────────────

const STEALTH_UA = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36";

// ── Generic marketing image detector (mirrors switch-image-fetcher.ts) ────────

const GENERIC_IMAGE_PATTERNS: RegExp[] = [
  /[-/_]logo[-_.]|\/logos?\//i,
  /cisco[-_]?logo/i,
  /juniper[-_]networks[-_]logo/i,
  /arista[-_]?logo/i,
  /brand[-_]?logo/i,
  /company[-_]?logo/i,
  /\/svg\//i,
  /\.svg(\?|$)/i,
  /naas-homepag/i,
  /al-enterprise.*\/images\/naas/i,
  /og[-_]default/i,
  /default[-_](?:og|social|share|image)/i,
  /site[-_](?:default|image|og)/i,
  /social[-_](?:default|share)/i,
  /twitter[-_]default/i,
  /default[-_]thumbnail/i,
  /\/homepage\//i,
  /hero[-_](?:banner|bg|background|image)/i,
  /banner[-_](?:bg|background)/i,
  /lifestyle/i,
  /stock[-_]?photo/i,
  /placeholder/i,
  /no[-_]?image/i,
  /image[-_]?not[-_]?found/i,
  /\/fallback[/-]/i,
  /missing[-_]image/i,
  /\/press[-_]kit/i,
  /\/media[-_]kit/i,
  // Vendor-specific brand icons
  /open-graph\.gif/i,
  /social[-_]icon/i,
  /favicon/i,
  /og[-_]image[-_][0-9]+x[0-9]+\./i, // e.g. og-image-1200x630 → family-level generic
  // Cookie consent / GDPR overlay images (OneTrust, Cookiebot, TrustArc, etc.)
  /cdn\.cookielaw\.org/i,
  /cookiebot\.com/i,
  /trustarc\.com/i,
  /consent-manager/i,
  // Nokia CMS marketing banners (not product photos)
  /nok\d+-nokia-com-banner/i,
  // Huawei category/why-buy marketing images
  /whyhuawei-/i,
  /campus-switches/i,
  /bg_products/i,
  // Generic "banners" path segment used by CMSes
  /\/banners?\//i,
  // Vendor error / 404 graphics
  /404[-_]error/i,
  /error[-_]graphic/i,
  /webimage-404/i,
  // Navigation icon libraries (D-Link, other CMSes)
  /\/icon[-_]library\//i,
  // Diagrams and illustrations (not product photos)
  /[-_]illustration[._]/i,
  // Moxa brand/marketing images (not product photos)
  /\/Brand\//i,
  /cybersecurity\.png/i,
];

function isGenericImage(url: string): boolean {
  return GENERIC_IMAGE_PATTERNS.some((re) => re.test(url));
}

// ── Product page URL builders ─────────────────────────────────────────────────

function buildAristaUrl(model: string): string | null {
  // Map model to its Arista series page (og:image lives on series pages, not individual model pages).
  // Pattern: extract alphanumeric prefix before the first "-<digits>" port-count suffix.
  //   7060X5-32QS  → 7060x5  → /en/products/7060x5-series
  //   7050CX3-32S  → 7050cx3 → /en/products/7050cx3-series
  //   7280R3A-48D5 → 7280r3a → strip trailing sub-variant 'A' → 7280r3 → /en/products/7280r3-series
  //   7020R        → 7020r   → /en/products/7020r-series
  const leadMatch = model.match(/^(\d{3,4}[A-Z0-9]*?)(-\d|$)/i);
  if (!leadMatch) return null;

  let series = leadMatch[1].toLowerCase();
  // Strip trailing sub-variant 'a' (R3A → R3, R2A → R2) — Arista groups these on the base series page
  series = series.replace(/([a-z]\d+)a$/, "$1");

  return `https://www.arista.com/en/products/${series}-series`;
}

function buildDellUrl(model: string): string | null {
  // PowerSwitch Z9332F-ON → try Dell networking product page
  const cleanModel = model.replace(/^PowerSwitch\s+/i, "").trim();
  const slug = cleanModel.toLowerCase().replace(/[^a-z0-9-]/g, "-");
  return `https://www.dell.com/en-us/shop/dell-networking-switches/sc/networking-switches?appliedRefinements=DP_SEARCH_RESULTS_KEYWORDS~${encodeURIComponent(cleanModel)}`;
}

// Edgecore uses WooCommerce with /product/<slug>/ URLs (no .html suffix).
// Some models have non-obvious slugs verified via sitemap.
const EDGECORE_SLUG_MAP: Record<string, string> = {
  "AS7712-32X":  "as7712-32x-ec",                              // -ec suffix variant in Edgecore WooCommerce
  "Minipack2":   "minipack-as8000-open-modular-platform",      // Facebook OCP Minipack2
};

function buildEdgecoreUrl(model: string): string | null {
  if (model in EDGECORE_SLUG_MAP) {
    return `https://www.edge-core.com/product/${EDGECORE_SLUG_MAP[model]}/`;
  }
  // Standard slug: lowercase, replace non-alphanum with dash, collapse multiple dashes
  const slug = model.toLowerCase()
    .replace(/[^a-z0-9-]/g, "-")
    .replace(/-+/g, "-")
    .replace(/^-|-$/g, "");
  return slug ? `https://www.edge-core.com/product/${slug}/` : null;
}

function buildFortinetUrl(_model: string): string | null {
  // Fortinet product pages are fully JS-rendered and all redirect to generic /products/ethernet-switches.
  // No reliable og:image can be extracted — skip entirely.
  return null;
}

function buildHpeArubaUrl(model: string): string | null {
  // HPE Aruba series pages are stored in product_page_url for all known models.
  // Builder is a fallback for unknown models.
  const slug = model.toLowerCase().replace(/[^a-z0-9-]/g, "-");
  return `https://www.arubanetworks.com/products/switches/${slug}/`;
}

function buildExtremeUrl(model: string): string | null {
  // Extreme direct product pages: extremenetworks.com/product/<slug>
  const slug = model.toLowerCase()
    .replace(/\s+/g, "-")
    .replace(/[^a-z0-9-]/g, "")
    .replace(/-+/g, "-");
  return slug ? `https://www.extremenetworks.com/product/${slug}` : null;
}

// ── New vendors (JS-rendered; rely on stored product_page_url or built URL) ────

// Nokia, Huawei, Ciena, Moxa, D-Link, ALE, Asterfusion, Brocade:
// all models have product_page_url in DB → return null so the stored URL is used.
const buildPassthroughUrl = (_model: string): string | null => null;

function buildNvidiaUrl(model: string): string | null {
  // NVIDIA Spectrum switches: SN5600, SN4700, SN3700, SN3750-SX, SN2201, etc.
  // ConnectX-7 is an HCA, no relevant product page → skip.
  const snMatch = model.match(/^(SN[\d]+)/i);
  if (snMatch) {
    return `https://www.nvidia.com/en-us/networking/ethernet-switching/${snMatch[1].toLowerCase()}/`;
  }
  return null;
}

function buildNetgearUrl(model: string): string | null {
  // M4300-96X, M4350-48G4XF, M4500-32C → /business/wired/switches/fully-managed/<slug>/
  const slug = model.toLowerCase()
    .replace(/[^a-z0-9]/g, "-")
    .replace(/-+/g, "-")
    .replace(/^-|-$/g, "");
  return slug ? `https://www.netgear.com/business/wired/switches/fully-managed/${slug}/` : null;
}

// UfiSpace: slug map derived from sitemap (non-predictable product URL tree)
const UFISPACE_URL_MAP: Record<string, string> = {
  "S9510-28DC": "https://www.ufispace.com/products/telco/access/s9510-28dc-flexe-tsn-disaggregated-cell-site-gateway",
  "S9600-30DX": "https://www.ufispace.com/products/telco/aggregation/s9600-30dx-open-zr-aggregation-router",
  "S9600-32X":  "https://www.ufispace.com/products/telco/aggregation/s9600-32x-25g-100g-aggregation-router",
  "S9600-72XC": "https://www.ufispace.com/products/telco/aggregation/s9600-72xc-25g-100g-open-aggregation-router-tcam",
  "S9700-53DX": "https://www.ufispace.com/products/telco/core-edge/s9700-53dx-100g-core-router",
  "S9710-76D":  "https://www.ufispace.com/products/telco/core-edge/s9710-76d-high-density-400g-disaggregated-core-router",
};
function buildUfiSpaceUrl(model: string): string | null {
  return UFISPACE_URL_MAP[model] ?? null;
}

// QCT: URL map derived from sitemap (category path not predictable from model name)
const QCT_URL_MAP: Record<string, string> = {
  "QuantaMesh T3048-LY8": "https://www.qct.io/product/index/Networking/Ethernet-Switch/T3000-Series/QuantaMesh-T3048-LY8",
  "QuantaMesh T7032-IX1": "https://www.qct.io/product/index/Networking/Bare-Metal-Switch/Spine-Switch/QuantaMesh-BMS-T7032-IX1",
};
function buildQctUrl(model: string): string | null {
  return QCT_URL_MAP[model] ?? null;
}

const URL_BUILDERS: Record<string, (m: string) => string | null> = {
  arista:                      buildAristaUrl,
  dell:                        buildDellUrl,
  edgecore:                    buildEdgecoreUrl,
  fortinet:                    buildFortinetUrl,
  "hpe-aruba":                 buildHpeArubaUrl,
  extreme:                     buildExtremeUrl,
  // New JS-rendered vendors (stored product_page_url used where available)
  nokia:                       buildPassthroughUrl,
  huawei:                      buildPassthroughUrl,
  ciena:                       buildPassthroughUrl,
  moxa:                        buildPassthroughUrl,
  "d-link":                    buildPassthroughUrl,
  "alcatel-lucent-enterprise": buildPassthroughUrl,
  asterfusion:                 buildPassthroughUrl,
  brocade:                     buildPassthroughUrl,
  "nvidia-networking":         buildNvidiaUrl,
  netgear:                     buildNetgearUrl,
  ufispace:                    buildUfiSpaceUrl,
  "quanta-cloud-technology":   buildQctUrl,
};

// ── Request data attached to each crawl URL ──────────────────────────────────

interface SwitchCrawlData {
  switchId: string;
  model: string;
  vendorName: string;
  vendorSlug: string;
  productPageUrl: string;
}

// ── Main scraper ──────────────────────────────────────────────────────────────

export async function fetchSwitchImagesPlaywright(targetVendorSlug?: string): Promise<void> {
  console.log("=== Switch Image Fetcher (Playwright) ===\n");

  const slugFilter = targetVendorSlug ? `AND v.slug = '${targetVendorSlug}'` : `AND v.slug IN (${Object.keys(URL_BUILDERS).map((s) => `'${s}'`).join(",")})`;

  const { rows } = await pool.query<{
    id: string;
    model: string;
    vendor_slug: string;
    vendor_name: string;
    product_page_url: string | null;
  }>(`
    SELECT sw.id, sw.model, sw.product_page_url,
           v.slug AS vendor_slug, v.name AS vendor_name
    FROM switches sw
    JOIN vendors v ON v.id = sw.vendor_id
    WHERE (sw.image_url IS NULL OR sw.image_url = '')
      ${slugFilter}
    ORDER BY v.slug, sw.model
  `);

  if (rows.length === 0) {
    console.log("  All target switches already have images.\n");
    return;
  }

  console.log(`  ${rows.length} switches need images (Playwright vendors)\n`);

  const requests: Array<{ url: string; uniqueKey: string; userData: SwitchCrawlData }> = [];

  for (const row of rows) {
    const builder = URL_BUILDERS[row.vendor_slug];
    // For Arista: prefer freshly-built series URL over a stale stored model URL
    const builtUrl = builder ? builder(row.model) : null;
    const productUrl = row.vendor_slug === "arista"
      ? (builtUrl ?? row.product_page_url)   // always use fresh series URL for Arista
      : (row.product_page_url ?? builtUrl);   // other vendors: prefer stored URL
    if (!productUrl) {
      console.log(`  [SKIP] ${row.vendor_name} ${row.model} — no URL`);
      continue;
    }
    requests.push({
      url: productUrl,
      // Use switch ID as uniqueKey so Crawlee doesn't deduplicate series-level URLs.
      // Multiple models can share the same series page (e.g. 7060x5-series) — each needs its own DB write.
      uniqueKey: row.id,
      userData: {
        switchId: row.id,
        model: row.model,
        vendorName: row.vendor_name,
        vendorSlug: row.vendor_slug,
        productPageUrl: productUrl,
      },
    });
  }

  if (requests.length === 0) {
    console.log("  Nothing to crawl.\n");
    return;
  }

  let found = 0;
  let missed = 0;
  let errors = 0;

  const crawler = new PlaywrightCrawler(
    {
      maxConcurrency: 1,              // one at a time — server-friendly
      maxRequestsPerMinute: 12,       // ~5s per request minimum
      requestHandlerTimeoutSecs: 45,
      navigationTimeoutSecs: 30,
      headless: true,
      launchContext: {
        launchOptions: {
          args: [
            "--no-sandbox",
            "--disable-setuid-sandbox",
            "--disable-blink-features=AutomationControlled",
            "--disable-infobars",
            "--window-size=1920,1080",
          ],
        },
      },

      preNavigationHooks: [
        async (_ctx, gotoOptions) => {
          gotoOptions!.waitUntil = "domcontentloaded";
        },
      ],

      async requestHandler({ request, page }) {
        const data = request.userData as SwitchCrawlData;

        // Inject stealth UA
        await page.setExtraHTTPHeaders({
          "Accept-Language": "en-US,en;q=0.9",
          "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
        });
        await page.evaluate((ua) => {
          Object.defineProperty(navigator, "userAgent", { value: ua, configurable: true });
          Object.defineProperty(navigator, "webdriver", { value: false, configurable: true });
        }, STEALTH_UA);

        // Wait for page to settle (JS rendering)
        await page.waitForLoadState("networkidle", { timeout: 20_000 }).catch(() => {});

        // Extract og:image / twitter:image meta tags.
        // We DON'T filter generics here — we filter outside so the img fallback can still run
        // even when og:image exists but is a logo/brand image (e.g. Dell, HPE).
        const metaImageUrl: string | null = await page.evaluate(() => {
          const og = document.querySelector<HTMLMetaElement>('meta[property="og:image"]')?.content;
          if (og) return og;
          const tw = document.querySelector<HTMLMetaElement>('meta[name="twitter:image"]')?.content;
          return tw ?? null;
        });

        // Use meta image if it passes the generic filter; otherwise fall through to img fallback.
        let imageUrl: string | null = (metaImageUrl && !isGenericImage(metaImageUrl)) ? metaImageUrl : null;

        if (!imageUrl) {
          // Img fallback: largest visible image that isn't a UI element.
          // Deliberately broad — isGenericImage() will filter hero/banner/logo images afterward.
          imageUrl = await page.evaluate(() => {
            const imgs = Array.from(document.querySelectorAll<HTMLImageElement>("img"));
            const skipPattern = /\/flags?\/|\/icons?\/|\/avatars?\/|social[-_]icon|favicon|spinner|loading|cookielaw|cookiebot|trustarc/i;
            const candidate = imgs
              .filter((img) => {
                const src = img.src || img.getAttribute("data-src") || "";
                return src.startsWith("http") &&
                  /\.(jpg|jpeg|png|webp)/i.test(src) &&
                  img.naturalWidth >= 200 &&
                  img.naturalHeight >= 150 &&
                  !skipPattern.test(src);
              })
              .sort((a, b) => (b.naturalWidth * b.naturalHeight) - (a.naturalWidth * a.naturalHeight))[0];
            return candidate?.src ?? null;
          });
        }

        if (!imageUrl || isGenericImage(imageUrl)) {
          console.log(`  [MISS] ${data.vendorName} ${data.model} — no product image (${imageUrl?.slice(0, 60) ?? "null"})`);
          missed++;

          // Save product_page_url even on miss to track that we tried
          if (!data.productPageUrl) {
            await pool.query(
              `UPDATE switches SET product_page_url = $2, assets_scraped_at = NOW() WHERE id = $1`,
              [data.switchId, request.url],
            );
          }
          return;
        }

        await pool.query(
          `UPDATE switches
           SET image_url = $2,
               product_page_url = COALESCE(product_page_url, $3),
               assets_scraped_at = NOW()
           WHERE id = $1`,
          [data.switchId, imageUrl, request.url],
        );
        console.log(`  [OK]   ${data.vendorName} ${data.model} → ${imageUrl.slice(0, 80)}`);
        found++;
      },

      async failedRequestHandler({ request }) {
        const data = request.userData as SwitchCrawlData;
        console.log(`  [FAIL] ${data.vendorName} ${data.model} — ${request.errorMessages?.[0] ?? "unknown error"}`);
        errors++;
      },
    },
    // Use a unique run ID to avoid Crawlee temp-dir state contamination when multiple
    // vendor runs execute back-to-back (ENOENT: stale request-queue files from prior run).
    makeCrawleeConfig(`switch-images-playwright-${Date.now()}`),
  );

  await crawler.run(requests);

  console.log(`\n=== Playwright Image Scraper Complete ===`);
  console.log(`  Images found: ${found}`);
  console.log(`  Missed:       ${missed}`);
  if (errors > 0) console.warn(`  Errors:       ${errors}`);
}

if (require.main === module) {
  const vendor = process.argv.find((a) => a.startsWith("--vendor="))?.split("=")[1];
  fetchSwitchImagesPlaywright(vendor)
    .then(() => pool.end())
    .catch((err) => { console.error("Fatal:", err); pool.end(); process.exit(1); });
}