Custom web software, administrative tools, and automated operational engines.

// 1. Direct In-Memory Catalog Mutator (Zero Vendor Frameworks)
interface CatalogItem {
  id: string;
  title: string;
  pricePKR: number;
  stockStatus: 'IN_STOCK' | 'BACKORDER';
  dimensions?: { w: number; h: number; d: number };
}

export class StorefrontEngine {
  private storeKey = "HZF_MERCHANT_CATALOG_V1";

  public commitStockDelta(id: string, newPrice: number): boolean {
    const catalog = this.readManifest();
    const target = catalog.find(item => item.id === id);
    if (!target) throw new Error(`Stock Item ${id} not found.`);
    
    target.pricePKR = newPrice;
    localStorage.setItem(this.storeKey, JSON.stringify(catalog));
    this.dispatchCloudSync(target); // Asynchronous background Edge sync
    return true;
  }
}

// 2. High-Efficiency WhatsApp Order Manifest Compiler
export function compileWhatsAppPayload(cart: CartItem[], customer: CustomerData): string {
  const header = `*NEW ORDER RECEIVED — SAMUNDRI DISPATCH*\n`;
  const timestamp = `Timestamp: ${new Date().toISOString()}\n\n`;
  
  const items = cart.map((i, idx) => 
    `${idx + 1}. *${i.title}* x${i.qty} — PKR ${(i.pricePKR * i.qty).toLocaleString()}`
  ).join('\n');

  const total = cart.reduce((acc, i) => acc + (i.pricePKR * i.qty), 0);
  const footer = `\n\n*TOTAL DUE:* PKR ${total.toLocaleString()}\n*DELIVERY:* ${customer.city}, ${customer.address}`;
  
  return encodeURIComponent(header + timestamp + items + footer);
}

-- 3. High-Performance Relational Schema (Postgres / Cloudflare D1)
CREATE TABLE IF NOT EXISTS merchant_products (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  sku VARCHAR(32) UNIQUE NOT NULL,
  name TEXT NOT NULL,
  price_pkr INTEGER NOT NULL,
  stock_count INTEGER DEFAULT 0,
  metadata JSONB DEFAULT '{}'::jsonb,
  updated_at TIMESTAMPTZ DEFAULT NOW()
);

CREATE INDEX idx_products_sku ON merchant_products (sku);
CREATE INDEX idx_products_updated ON merchant_products (updated_at DESC);