import { z } from 'zod';
import { BaseConnector, html as H, type ConnectorMeta, type CrawlContext, type RawRecordInput, type RawRecordLike } from '@rareindex/connectors';
import { AssetAttributesSchema, NormalizedCatalogItemSchema, NormalizedListingSchema, parseSourceDate, type NormalizedRecord } from '@rareindex/shared';
import { parseGradeFromTitle } from '@rareindex/taxonomy';

const BASE = 'https://www.suruga-ya.jp';
const PARSER_VERSION = '1.0.0';

export const CardSchema = z.object({
  id: z.string(),
  url: z.string(),
  title: z.string(),
  image: z.string().nullable(),
  typeLabel: z.string().nullable(),
  releaseDate: z.string().nullable(),
  brand: z.string().nullable(),
  price: z.number().nullable(),
  soldOut: z.boolean(),
  listPrice: z.number().nullable(),
  marketplacePrice: z.number().nullable(),
  used: z.boolean(),
});
export type Card = z.infer<typeof CardSchema>;
export const PagePayloadSchema = z.object({ kind: z.literal('search_page'), url: z.string(), categorySlug: z.string(), items: z.array(CardSchema) });
export type PagePayload = z.infer<typeof PagePayloadSchema>;

export function yen(s: string | null | undefined): number | null {
  const m = s?.replace(/,/g, '').match(/[￥¥]\s*(\d+)/);
  return m ? Number(m[1]) : null;
}

/** Parse a search results page into compact cards. */
export function parseSearchPage(htmlText: string, pageUrl: string, categorySlug: string): PagePayload {
  const $ = H.load(htmlText);
  const items: Card[] = [];
  $('.item').each((_, el) => {
    const e = $(el);
    const a = e.find('a[href*="/product/detail/"], a[href*="/product/other/"]').first();
    const href = a.attr('href');
    if (!href) return;
    const url = href.split('?')[0]!;
    const id = url.match(/\/product\/(?:detail|other)\/([A-Za-z0-9]+)/)?.[1];
    const title = H.text(e.find('h3.product-name').first()) ?? H.text(a);
    if (!id || !title) return;
    const image = e.find('img').first().attr('src') ?? null;
    const typeLabel = H.text(e.find('.condition').filter((__, c) => Boolean($(c).text().trim())).first());
    const releaseRaw = H.text(e.find('.release_date').first());
    const releaseDate = releaseRaw?.match(/(\d{4}\/\d{2}\/\d{2})/)?.[1] ?? null;
    const brand = H.text(e.find('.brand').first())?.replace(/^\[|\]$/g, '').trim() || null;
    const priceText = H.text(e.find('.item_price .price').first()) ?? '';
    const soldOut = /品切れ/.test(priceText);
    const price = soldOut ? null : yen(priceText);
    const listPrice = yen(H.text(e.find('.price_teika').first()));
    const marketplacePrice = yen(e.find('.highlight-box strong').map((__, x) => $(x).text()).get().find((t) => /[￥¥]/.test(t)) ?? null);
    const used = /中古/.test(e.text()) || /中古/.test(priceText);
    items.push({ id, url: url.startsWith('http') ? url : BASE + url, title, image: image && image.startsWith('http') ? image : image ? BASE + image : null, typeLabel: typeLabel ?? null, releaseDate, brand, price, soldOut, listPrice, marketplacePrice, used });
  });
  return { kind: 'search_page', url: pageUrl, categorySlug, items };
}

/**
 * Japanese card titles look like "114/083[SAR]：【PSA/GEM MT 10】(キラ)メガゲッコウガex".
 * Extract card number, rarity code, grade and the bare name; everything unknown stays null.
 */
export function parseJpCardTitle(title: string): { number: string | null; rarity: string | null; name: string; grader: string | null; grade: string | null } {
  const number = title.match(/^(\d{1,3}\/\d{1,3})/)?.[1] ?? null;
  const rarity = title.match(/\[([A-Z]{1,4})\]/)?.[1] ?? null;
  const g = parseGradeFromTitle(title.replace(/【([A-Z]{2,4})\/?/g, '【$1 ').replace(/[【】]/g, ' '));
  let name = title.replace(/^\d{1,3}\/\d{1,3}\s*/, '').replace(/\[[A-Z]{1,4}\]\s*[：:]?\s*/, '').replace(/【[^】]*】\s*/g, '').replace(/\((キラ|ミラー|ノーマル)\)\s*/g, '').trim();
  if (!name) name = title;
  return { number, rarity, name, grader: g.grader && g.grader !== 'raw' ? g.grader : null, grade: g.grade };
}

export class SurugayaConnector extends BaseConnector {
  readonly version = '1.0.0';
  readonly parserVersion = PARSER_VERSION;
  protected override minIntervalMs = 2000;

  async *crawl(ctx: CrawlContext): AsyncIterable<RawRecordInput> {
    const seeds = (this.meta.config.seeds as Array<{ query: string; categorySlug: string }> | undefined) ?? [];
    const pages = Number(this.meta.config.pagesPerSeed ?? 1);
    const cap = ctx.options.limit;
    let count = 0;
    const startSeed = ctx.options.mode === 'incremental' ? Number(ctx.options.cursor?.seedIndex ?? 0) : 0;
    for (let i = startSeed; i < seeds.length; i++) {
      const seed = seeds[i]!;
      for (let page = 1; page <= pages; page++) {
        if (ctx.signal?.aborted || (cap !== undefined && count >= cap)) return;
        const url = `${BASE}/search?${seed.query}${page > 1 ? `&page=${page}` : ''}`;
        await this.throttle();
        const res = await ctx.fetch(url, {
          // Firecrawl only: Scrapfly's rendered fallback costs ~40 credits/page here and adds nothing.
          engines: ['firecrawl'],
          minQuality: 0.3, // pages where every card is sold out (no price) are still valid catalog data
          expect: ['title', 'price'],
          parse: (r) => {
            const p = r.html ? parseSearchPage(r.html, url, seed.categorySlug) : null;
            return p?.items.length ? { title: 'ok', price: p.items.some((x) => x.price || x.marketplacePrice) ? 1 : null } : null;
          },
        });
        const payload = res.success && res.html ? parseSearchPage(res.html, url, seed.categorySlug) : null;
        if (!payload?.items.length) {
          ctx.anomaly('page_fetch_failed', `${url}: ${res.error ?? res.httpStatus ?? 'no cards'}`);
          break;
        }
        count++;
        yield { url, externalId: `${seed.query}|p${page}`, kind: 'listing', engine: res.engine, httpStatus: res.httpStatus, payload, fetchedAt: res.fetchedAt };
      }
      await ctx.setCursor({ seedIndex: i + 1 >= seeds.length ? 0 : i + 1, updatedAt: new Date().toISOString() });
    }
  }

  async normalize(raw: RawRecordLike): Promise<NormalizedRecord[]> {
    const p = PagePayloadSchema.parse(raw.payload);
    const out: NormalizedRecord[] = [];
    for (const c of p.items) {
      const release = c.releaseDate ? parseSourceDate(c.releaseDate) : null;
      const year = release ? release.getUTCFullYear() : null;
      const isCard = ['pokemon', 'yugioh', 'one_piece_card_game'].includes(p.categorySlug);
      const card = isCard ? parseJpCardTitle(c.title) : null;
      const attributes = AssetAttributesSchema.parse({
        categorySlug: p.categorySlug,
        brand: c.brand,
        franchise: c.brand,
        name: card?.name ?? c.title,
        number: card?.number ?? null,
        rarity: card?.rarity ?? null,
        year,
        language: 'Japanese',
        region: 'JP',
        originalMsrp: c.listPrice,
        originalMsrpCurrency: c.listPrice ? 'JPY' : null,
        identifiers: { surugaya_id: c.id },
        metadata: { type_label: c.typeLabel, release: c.releaseDate },
      });
      const rawTitle = `${c.title}${c.brand ? ` [${c.brand}]` : ''}${year ? ` (${year})` : ''}`;
      const grade = { grader: card?.grader ?? null, grade: card?.grade ?? null, qualifier: null, certificationNumber: null };
      const base = { connectorId: this.meta.id, sourceId: this.meta.sourceId, sourceUrl: c.url, rawTitle, imageUrls: c.image ? [c.image] : [], attributes, grade, observedAt: raw.fetchedAt, parserVersion: PARSER_VERSION };
      out.push(NormalizedCatalogItemSchema.parse({ kind: 'catalog_item', ...base, externalId: c.id, confidence: 0.8, releaseDate: release }));
      const price = c.price ?? c.marketplacePrice;
      if (price) {
        const viaMarketplace = c.price === null && c.marketplacePrice !== null;
        out.push(
          NormalizedListingSchema.parse({
            kind: 'listing',
            ...base,
            externalId: viaMarketplace ? `${c.id}:mp` : c.id,
            confidence: 0.8,
            listingType: 'fixed_price',
            price,
            currency: 'JPY',
            seller: viaMarketplace ? 'Suruga-ya marketplace seller' : 'Suruga-ya',
            location: 'Japan',
            condition: { condition: c.used || viaMarketplace ? null : 'mint_in_box', conditionRaw: viaMarketplace ? '中古 (marketplace)' : c.used ? '中古' : '新品', completeness: null },
            availability: 'available',
          }),
        );
      } else if (c.soldOut) {
        out.push(NormalizedListingSchema.parse({ kind: 'listing', ...base, externalId: c.id, confidence: 0.7, listingType: 'fixed_price', price: null, currency: 'JPY', seller: 'Suruga-ya', location: 'Japan', availability: 'sold' }));
      }
    }
    return out;
  }
}

export default function createConnector(meta: ConnectorMeta) {
  return new SurugayaConnector(meta);
}