import { z } from 'zod';
import { BaseConnector, type ConnectorMeta, type CrawlContext, type RawRecordInput, type RawRecordLike } from '@rareindex/connectors';
import { normalizeCondition } from '@rareindex/taxonomy';
import { AssetAttributesSchema, NormalizedListingSchema, type NormalizedRecord } from '@rareindex/shared';
import { ShopifyProductSchema, caseSize, fetchShopifyPage, moneyNumber, trimShopifyProduct, watchCategory, watchCompleteness, watchConditionRaw, watchMaterial, watchReferenceFromText, yearFrom } from '../_luxury-lib/index.js';

/** Analog:Shift — vintage & pre-owned watch dealer (Shopify storefront, USD). One product = one watch. */
const BASE = 'https://analogshift.com';
const PARSER_VERSION = '1.0.0';

export const PagePayloadSchema = z.object({ kind: z.literal('shopify_page'), url: z.string(), seed: z.string(), page: z.number(), products: z.array(ShopifyProductSchema) });
export type PagePayload = z.infer<typeof PagePayloadSchema>;

/** Spec lines Analog:Shift writes in the description: "Reference: 1675", "Year: 1968", "Case Size: 40mm". */
export function specs(body: string | null | undefined): Record<string, string> {
  const out: Record<string, string> = {};
  if (!body) return out;
  for (const m of body.matchAll(/\b(Reference|Ref\.?|Year|Case Size|Case Diameter|Movement|Caliber|Dial|Bracelet|Strap|Box|Papers|Condition|Material|Case Material)\s*:\s*([^:]{1,60}?)(?=\s+[A-Z][a-z]+(?: [A-Z][a-z]+)?\s*:|$)/g)) {
    const KEYS: Record<string, string> = { ref: 'reference', reference: 'reference', 'case diameter': 'case size', 'case material': 'material' };
    const rawKey = m[1]!.toLowerCase().replace(/\.$/, '');
    const k = KEYS[rawKey] ?? rawKey;
    if (!(k in out)) out[k] = m[2]!.trim();
  }
  return out;
}

export class AnalogShiftConnector extends BaseConnector {
  readonly version = '1.0.0';
  readonly parserVersion = PARSER_VERSION;
  protected override minIntervalMs = 1500;
  override readonly urlPatterns = [/^https?:\/\/(www\.)?analogshift\.com\/products\/([a-z0-9-]+)/i];

  async *crawl(ctx: CrawlContext): AsyncIterable<RawRecordInput> {
    const seeds = (ctx.options.seeds?.length ? ctx.options.seeds : (this.meta.config.seeds as string[] | undefined)) ?? ['all'];
    const pages = ctx.options.mode === 'backfill' ? 20 : Number(this.meta.config.pagesPerSeed ?? 3);
    let count = 0;
    for (const seed of seeds) {
      for (let page = 1; page <= pages; page++) {
        if (ctx.signal?.aborted || this.reached(ctx, count)) return;
        await this.throttle();
        const path = seed === 'all' ? '/products.json' : `/collections/${seed}/products.json`;
        const { products, res } = await fetchShopifyPage(ctx, BASE, path, page);
        if (!res.success) {
          ctx.anomaly('page_fetch_failed', `${seed} p${page}: ${res.error ?? res.httpStatus}`);
          break;
        }
        if (products.length === 0) break;
        count++;
        const payload: PagePayload = { kind: 'shopify_page', url: `${BASE}${path}?page=${page}`, seed, page, products: products.map(trimShopifyProduct) };
        yield { url: payload.url, externalId: `collection:${seed}:${page}`, kind: 'listing', engine: res.engine, httpStatus: res.httpStatus, payload, fetchedAt: res.fetchedAt };
        if (products.length < 250) break;
      }
    }
  }

  async lookup(url: string, ctx: CrawlContext): Promise<RawRecordInput[]> {
    const handle = url.match(this.urlPatterns[0]!)?.[2];
    if (!handle) return [];
    await this.throttle();
    const res = await ctx.fetch(`${BASE}/products/${handle}.json`, { engines: ['api'], responseType: 'json', minQuality: 0.2 });
    const parsed = z.object({ product: ShopifyProductSchema }).safeParse(res.json);
    if (!res.success || !parsed.success) return [];
    const payload: PagePayload = { kind: 'shopify_page', url: `${BASE}/products/${handle}`, seed: `product:${handle}`, page: 1, products: [trimShopifyProduct(parsed.data.product)] };
    return [{ url: payload.url, externalId: `product:${handle}`, kind: 'listing', engine: res.engine, httpStatus: res.httpStatus, payload, fetchedAt: res.fetchedAt }];
  }

  async normalize(raw: RawRecordLike): Promise<NormalizedRecord[]> {
    const p = PagePayloadSchema.parse(raw.payload);
    const out: NormalizedRecord[] = [];
    for (const pr of p.products) {
      const v = pr.variants[0];
      if (!v) continue;
      const price = moneyNumber(v.price);
      const title = pr.title.replace(/\s+/g, ' ').trim();
      const body = pr.body_html ?? '';
      const sp = specs(body);
      const brand = pr.vendor?.trim() || null;
      const categorySlug = watchCategory(brand);
      if (categorySlug === 'other_watches' && /gift card|strap|book|accessor/i.test(pr.product_type ?? '')) continue;
      const ref = sp.reference ?? watchReferenceFromText(title) ?? watchReferenceFromText(body);
      const year = sp.year ? yearFrom(sp.year) : yearFrom(title) ?? yearFrom(body);
      const condRaw = sp.condition ?? watchConditionRaw(body);
      const attributes = AssetAttributesSchema.parse({
        categorySlug,
        brand,
        name: brand && !title.toLowerCase().startsWith(brand.toLowerCase()) ? `${brand} ${title}` : title,
        model: pr.product_type && !/watch/i.test(pr.product_type) ? pr.product_type : null,
        reference: ref,
        year,
        material: sp.material ?? watchMaterial(title) ?? watchMaterial(body),
        size: sp['case size'] ?? caseSize(title) ?? caseSize(body),
        identifiers: { analogshift_sku: v.sku?.trim() || String(pr.id), ...(ref ? { reference: ref } : {}) },
        metadata: { product_type: pr.product_type, tags: pr.tags?.slice(0, 12) ?? [], movement: sp.movement ?? sp.caliber ?? null, dial: sp.dial ?? null, bracelet: sp.bracelet ?? sp.strap ?? null },
      });
      const listedAt = pr.published_at ? new Date(pr.published_at) : null;
      out.push(
        NormalizedListingSchema.parse({
          kind: 'listing',
          connectorId: this.meta.id,
          sourceId: this.meta.sourceId,
          sourceUrl: `${BASE}/products/${pr.handle}`,
          externalId: String(pr.id),
          rawTitle: title,
          description: body || null,
          imageUrls: (pr.images ?? []).map((i) => i.src),
          attributes,
          condition: { condition: normalizeCondition(categorySlug, condRaw), conditionRaw: condRaw, completeness: watchCompleteness(body) },
          observedAt: raw.fetchedAt,
          confidence: 0.85,
          parserVersion: PARSER_VERSION,
          listingType: 'fixed_price',
          price,
          currency: price ? 'USD' : null,
          seller: 'Analog:Shift',
          location: 'US',
          quantity: 1,
          listedAt: listedAt && !Number.isNaN(listedAt.getTime()) ? listedAt : null,
          availability: pr.published_at ? (v.available ? 'available' : 'sold') : 'removed',
        }),
      );
    }
    return out;
  }
}

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