/**
 * Crawler LLM — Schema definitions for structured product extraction.
 *
 * Every schema includes a `confidence` and `source_evidence` field so the LLM
 * is forced to cite its work. This enables validation and debugging.
 */

export interface StockExtractionResult {
  is_product_page: boolean;      // false = category/listing page → discard
  confidence: number;            // 0.0 – 1.0 — LLM self-assessment
  source_evidence: string;       // which text passage the LLM used

  // Pricing
  price: number | null;
  currency: "USD" | "EUR" | "GBP" | "CNY" | null;
  price_breaks: PriceBreak[];    // volume discount tiers

  // Stock
  stock_level: "in_stock" | "out_of_stock" | "limited" | "unknown";
  stock_quantity: number | null; // exact qty if shown
  incoming_quantity: number | null;  // "18 im Zulauf"
  incoming_eta: string | null;   // ISO date string "2026-04-15"
  lead_time_days: number | null;
  moq: number | null;            // minimum order quantity

  // Product identity (for cross-validation)
  part_number: string | null;
  standard_name: string | null;  // manufacturer's exact product name
  form_factor: string | null;
  speed_gbps: number | null;
}

export interface PriceBreak {
  qty: number;
  price: number;
}

export interface MarketIntelExtractionResult {
  is_relevant: boolean;          // false = skip
  confidence: number;
  source_evidence: string;

  intel_type: "capex_cycle" | "trade_show" | "standard_ratified" | "standard_draft" | "distributor_lead_time" | "supply_chain" | "tender";
  title: string;
  summary: string;
  technologies: string[];        // ['400G', 'QSFP-DD', ...]
  buy_signal_implication: "buy_now" | "wait" | "hold" | "monitor" | "none";
  impact_horizon_months: number;
  published_at: string | null;   // ISO date
}

/** Vendor-specific hints to improve LLM extraction accuracy */
export interface VendorProfile {
  slug: string;
  name: string;
  currency: "USD" | "EUR" | "GBP" | "CNY";
  product_page_signals: string[];   // text patterns that indicate a product page
  category_page_signals: string[];  // text patterns that indicate a category page
  price_hint: string | null;        // natural language hint for the LLM
  stock_hint: string | null;
  known_moq: number | null;
}

export const VENDOR_PROFILES: Record<string, VendorProfile> = {
  "flexoptix": {
    slug: "flexoptix",
    name: "Flexoptix",
    currency: "EUR",
    product_page_signals: ["In den Warenkorb", "Add to Cart", "part number", "SKU:", "P/N:"],
    category_page_signals: ["Alle Produkte", "Filter", "Ergebnisse", "products found"],
    price_hint: "Price is shown in EUR, usually near 'In den Warenkorb' button. May show 'auf Anfrage' if not listed.",
    stock_hint: "Look for 'auf Lager', 'Lieferzeit', 'sofort lieferbar', or stock badge near price.",
    known_moq: 1,
  },
  "fs-com": {
    slug: "fs-com",
    name: "FS.com",
    currency: "USD",
    product_page_signals: ["Add to Cart", "Part No.", "SKU", "In Stock", "Reviews"],
    category_page_signals: ["Products", "Filter by", "Sort by", "items found", "Category"],
    price_hint: "Price is in USD, shown prominently near 'Add to Cart'. May show qty pricing table.",
    stock_hint: "Look for 'In Stock', exact number like '847 In Stock', or 'Out of Stock'.",
    known_moq: 1,
  },
  "10gtek": {
    slug: "10gtek",
    name: "10Gtek",
    currency: "USD",
    product_page_signals: ["Add to Cart", "Product Code:", "In Stock", "Ships from"],
    category_page_signals: ["Shop All", "Filter", "Category", "Sort By"],
    price_hint: "Price in USD near Add to Cart button. Volume pricing sometimes shown as table.",
    stock_hint: "Stock level shown as text: 'In Stock', 'Low Stock', 'Out of Stock'.",
    known_moq: 1,
  },
  "atgbics": {
    slug: "atgbics",
    name: "ATGBICS",
    currency: "GBP",
    product_page_signals: ["Add to Basket", "Part Number:", "Stock:", "Delivery"],
    category_page_signals: ["Products", "Browse by", "Refine by"],
    price_hint: "Price in GBP. ATGBICS uses Shopify, price is in a span with class 'price'.",
    stock_hint: "Stock shown as 'In Stock', 'Limited Stock', or 'Out of Stock' near price.",
    known_moq: 1,
  },
  "prolabs": {
    slug: "prolabs",
    name: "ProLabs",
    currency: "USD",
    product_page_signals: ["Add to Cart", "Part Number", "In Stock", "Specs"],
    category_page_signals: ["Results", "Filter", "Category", "Sort"],
    price_hint: "Price in USD. ProLabs may require login for prices — if so, mark price as null.",
    stock_hint: "Stock availability shown near product title.",
    known_moq: 1,
  },
  "farnell": {
    slug: "farnell",
    name: "Farnell",
    currency: "EUR",
    product_page_signals: ["Add to Basket", "Order Code:", "Stock:", "Lead Time:"],
    category_page_signals: ["Products", "Refine Search", "Category", "results for"],
    price_hint: "Price in EUR or GBP. Farnell shows break prices in a table with columns Qty/Price.",
    stock_hint: "Stock shown as number, e.g. '47 In Stock'. Lead time shown in business days.",
    known_moq: 1,
  },
  "mouser": {
    slug: "mouser",
    name: "Mouser Electronics",
    currency: "EUR",
    product_page_signals: ["Add to Cart", "Mouser Part No.", "Mfr. Part No.", "In Stock:"],
    category_page_signals: ["Search Results", "Filter Results", "Products (", "Sort By"],
    price_hint: "Mouser shows price per unit and break quantities. USD or EUR depending on locale.",
    stock_hint: "Stock shown as exact number: 'In Stock: 124'. Lead time shown for out-of-stock items.",
    known_moq: null,
  },
};