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, bagHardware, bagMaterial, bagModel, bagSize, caseSize, fetchShopifyPage, moneyNumber, trimShopifyProduct, watchCategory, watchMaterial, watchReferenceFromText } from '../_luxury-lib/index.js';

/** Rebag — Shopify feed of individually graded pre-owned luxury items (USD). */
const BASE = 'https://shop.rebag.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>;

const CONDITION_MAP: Record<string, string> = { pristine: 'pristine', excellent: 'excellent', great: 'very_good', 'very good': 'very_good', good: 'good', fair: 'fair', new: 'new' };

export function categoryFor(productType: string | null | undefined, vendor: string | null | undefined, tags: string[]): string {
  const t = (productType ?? '').toLowerCase();
  const tagStr = tags.join(' ').toLowerCase();
  if (/watch/.test(t) || /bc-filter-watches/.test(tagStr)) return watchCategory(vendor);
  if (/jewel|ring|bracelet|necklace|earring|brooch|pendant|charm/.test(t)) return 'jewelry';
  if (/bag|tote|clutch|satchel|backpack|wallet|pouch|luggage|handle|hobo|crossbody|shoulder|belt bag|case|small leather/.test(t)) return 'luxury_handbags';
  if (/shoe|sneaker|boot|sandal|heel|pump|loafer|apparel|clothing|scarf|shawl|belt|hat|sunglass|dress|jacket|coat|\btop\b|pant|skirt|sweater/.test(t)) return 'fashion_streetwear';
  return 'luxury_handbags';
}

/** "Great | Item # 417505/4 / Blue" → { grade: 'Great', color: 'Blue' } */
export function parseVariantTitle(title: string): { grade: string | null; color: string | null } {
  const parts = title.split('|').map((s) => s.trim());
  const grade = parts[0] && !/item/i.test(parts[0]) ? parts[0] : null;
  const colorPart = parts[parts.length - 1] ?? '';
  const color = colorPart.includes('/') ? (colorPart.split('/').pop()?.trim() ?? null) : null;
  return { grade, color: color || null };
}

export function retailFromBody(body: string | null | undefined): number | null {
  const m = (body ?? '').replace(/<[^>]+>/g, ' ').match(/Estimated Retail Price:\s*\$?\s*([0-9,]+(?:\.\d+)?)/i);
  return m ? moneyNumber(m[1]) : null;
}

export class RebagConnector extends BaseConnector {
  readonly version = '1.0.0';
  readonly parserVersion = PARSER_VERSION;
  protected override minIntervalMs = 1500;
  override readonly urlPatterns = [/^https?:\/\/(shop\.|www\.)?rebag\.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)) ?? [];
    const pages = ctx.options.mode === 'backfill' ? 20 : Number(this.meta.config.pagesPerSeed ?? 2);
    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 { products, res } = await fetchShopifyPage(ctx, BASE, `/collections/${seed}/products.json`, page);
        if (!res.success) {
          ctx.anomaly('page_fetch_failed', `${seed} p${page}: ${res.error ?? res.httpStatus}`);
          break;
        }
        if (products.length === 0) break;
        count++;
        const payload: PagePayload = { kind: 'shopify_page', url: `${BASE}/collections/${seed}/products.json?page=${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);
      if (!price) continue;
      const brand = pr.vendor ?? null;
      const tags = pr.tags ?? [];
      const categorySlug = categoryFor(pr.product_type, brand, tags);
      const isWatch = ['rolex', 'patek_philippe', 'audemars_piguet', 'omega', 'other_watches'].includes(categorySlug);
      const title = pr.title.replace(/\s+/g, ' ').trim();
      const { grade, color } = parseVariantTitle(v.title);
      const conditionRaw = grade;
      const condition = grade ? (CONDITION_MAP[grade.toLowerCase()] ?? normalizeCondition(categorySlug, grade)) : null;
      const ref = isWatch ? watchReferenceFromText(`${title} ${pr.body_html ?? ''}`) : null;
      const retail = retailFromBody(pr.body_html);
      const attributes = AssetAttributesSchema.parse({
        categorySlug,
        brand,
        name: brand ? `${brand} ${title}` : title,
        model: isWatch ? null : bagModel(title),
        reference: ref,
        material: isWatch ? watchMaterial(title) : bagMaterial(title),
        size: isWatch ? caseSize(title) : bagSize(title),
        color,
        originalMsrp: retail,
        originalMsrpCurrency: retail ? 'USD' : null,
        identifiers: { rebag_item: v.sku ?? String(pr.id), ...(ref ? { reference: ref } : {}) },
        metadata: { product_type: pr.product_type, hardware: bagHardware(title), filters: tags.filter((t) => t.startsWith('bc-filter-')).map((t) => t.slice(10)).slice(0, 15) },
      });
      const accessories = (pr.body_html ?? '').match(/Accessories:\s*([^.]{0,80})/i)?.[1]?.trim() ?? null;
      const completeness = accessories ? (/no accessories/i.test(accessories) ? 'item_only' : /box/i.test(accessories) && /dust ?bag|card|receipt/i.test(accessories) ? 'full_set' : /dust ?bag/i.test(accessories) ? 'dust_bag' : /box/i.test(accessories) ? 'box' : null) : null;
      out.push(
        NormalizedListingSchema.parse({
          kind: 'listing',
          connectorId: this.meta.id,
          sourceId: this.meta.sourceId,
          sourceUrl: `${BASE}/products/${pr.handle}`,
          externalId: String(pr.id),
          rawTitle: title,
          description: pr.body_html ?? null,
          imageUrls: (pr.images ?? []).map((i) => i.src),
          attributes,
          condition: { condition, conditionRaw, completeness },
          observedAt: raw.fetchedAt,
          confidence: 0.85,
          parserVersion: PARSER_VERSION,
          listingType: 'fixed_price',
          price,
          currency: 'USD',
          seller: 'Rebag',
          location: 'US',
          quantity: 1,
          listedAt: pr.published_at ? new Date(pr.published_at) : null,
          availability: v.available ? 'available' : 'sold',
        }),
      );
    }
    return out;
  }
}

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