/**
 * Wiitek Scraper — wiitek.com
 *
 * Chinese manufacturer/reseller, direct factory prices.
 * Covers: CSFP, SFP-DD, CFP, CFP2, OSFP224, QSFP112 and all standard forms.
 * Good for price benchmarking.
 *
 * Schedule: every 8h
 */
import * as cheerio from "cheerio";
import { ensureVendor, upsertPriceObservation, findOrCreateScrapedTransceiver } from "../utils/db";
import { contentHash, parsePrice } from "../utils/hash";
import { logger } from "../utils/logger";

const BASE = "https://www.wiitek.com";

const CATEGORIES: Array<{ path: string; form_factor: string }> = [
  { path: "/SFP-Transceiver/",              form_factor: "SFP" },
  { path: "/SFP-Plus-Transceiver/",         form_factor: "SFP+" },
  { path: "/SFP28-Transceiver/",            form_factor: "SFP28" },
  { path: "/SFP56-Transceiver/",            form_factor: "SFP56" },
  { path: "/SFP-DD-Transceiver/",           form_factor: "SFP-DD" },
  { path: "/CSFP-Transceiver/",             form_factor: "CSFP" },
  { path: "/QSFP-Transceiver/",             form_factor: "QSFP+" },
  { path: "/QSFP28-Transceiver/",           form_factor: "QSFP28" },
  { path: "/QSFP56-Transceiver/",           form_factor: "QSFP56" },
  { path: "/QSFP-DD-Transceiver/",          form_factor: "QSFP-DD" },
  { path: "/QSFP-DD800-Transceiver/",       form_factor: "QSFP-DD800" },
  { path: "/QSFP112-Transceiver/",          form_factor: "QSFP112" },
  { path: "/OSFP-Transceiver/",             form_factor: "OSFP" },
  { path: "/OSFP112-Transceiver/",          form_factor: "OSFP112" },
  { path: "/OSFP224-Transceiver/",          form_factor: "OSFP224" },
  { path: "/CFP-Transceiver/",              form_factor: "CFP" },
  { path: "/CFP2-Transceiver/",             form_factor: "CFP2" },
  { path: "/XFP-Transceiver/",              form_factor: "XFP" },
  { path: "/GBIC-Transceiver/",             form_factor: "GBIC" },
  { path: "/XENPAK-Transceiver/",           form_factor: "XENPAK" },
  { path: "/CXP-Transceiver/",              form_factor: "CXP" },
];

export async function scrapeWiitek(): Promise<void> {
  logger.info("Wiitek scraper starting");
  const vendorId = await ensureVendor("Wiitek", BASE);
  let total = 0;
  let newItems = 0;

  for (const cat of CATEGORIES) {
    try {
      const resp = await fetch(`${BASE}${cat.path}`, {
        headers: { "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36" },
        signal: AbortSignal.timeout(20_000),
      });
      if (!resp.ok) continue;
      const $ = cheerio.load(await resp.text());

      const items = $(".product-item, .goods-item, .pro-item, [class*=product]");
      for (let i = 0; i < items.length; i++) {
        const $el = $(items[i]);
        const name = $el.find("h2,h3,h4,.title,.name").first().text().trim();
        const priceText = $el.find(".price,.cost,[class*=price]").first().text().trim();
        const href = $el.find("a[href]").first().attr("href") || "";
        if (!name || !priceText) continue;

        const partMatch = name.match(/([A-Z0-9]{2,8}[-\/][A-Z0-9][A-Z0-9\-\.\/]{3,35})/);
        const partNumber = (partMatch ? partMatch[1] : name.substring(0, 50)).toUpperCase();
        const { price, currency } = parsePrice(priceText);
        if (price <= 0) continue;

        try {
          const transceiverId = await findOrCreateScrapedTransceiver({
            partNumber, vendorId, formFactor: cat.form_factor,
          });
          const isNew = await upsertPriceObservation({
            transceiverId, sourceVendorId: vendorId,
            price, currency: currency || "USD",
            stockLevel: "unknown",
            url: href.startsWith("http") ? href : `${BASE}${href}`,
            contentHash: contentHash({ partNumber, price, currency: currency || "USD" }),
          });
          if (isNew) newItems++;
          total++;
        } catch { /* skip */ }
      }
    } catch (e) {
      logger.warn(`Wiitek ${cat.form_factor} failed`, { err: e });
    }
  }
  logger.info(`Wiitek done — ${total} total, ${newItems} new`);
}