#!/usr/bin/env node
/**
 * Seed demo data into a running vmall-api (dev).
 * Usage: node scripts/seed-demo.mjs [baseUrl]
 * Idempotent: existing slugs/emails are reused, products are re-published,
 * and an owner's role is only reassigned when it does not already point at
 * the right shop.
 *
 * Categories are NOT created here - they are reference data seeded by the
 * migrations, because the API exposes no category write route.
 */
const base = process.argv[2] ?? "http://localhost:8080/api";

async function call(method, path, { token, body } = {}) {
  const res = await fetch(base + path, {
    method,
    headers: {
      "content-type": "application/json",
      ...(token ? { authorization: `Bearer ${token}` } : {}),
    },
    body: body ? JSON.stringify(body) : undefined,
  });
  const text = await res.text();
  let data;
  try {
    data = JSON.parse(text);
  } catch {
    data = text;
  }
  return { status: res.status, data };
}

const fail = (what, r) => {
  console.error(`FAILED ${what}: ${r.status}`, r.data);
  process.exit(1);
};

// 1. admin login
let r = await call("POST", "/auth/login", {
  body: { email: "admin@vmall.local", password: "admin1234" },
});
if (r.status !== 200) fail("admin login", r);
const admin = r.data.token;

// 2. shops with their own owner accounts and public profiles
const SHOPS = [
  {
    slug: "demo-store",
    name: { en: "Demo Store", zh: "演示店铺" },
    owner: { email: "shop@vmall.local", password: "shop12345", displayName: "Demo Owner" },
    profile: {
      logo: "/mock/store-1.svg",
      banner: "/mock/banner-1.svg",
      company: "Demo Commerce Co., Ltd.",
      region: "California",
      address: { en: "1 Market Street, San Francisco", zh: "旧金山市场街 1 号" },
      notice: { en: "Free shipping on orders over $99.", zh: "满 99 美元免运费。" },
      after_sale: { en: "7-day returns, 1-year warranty.", zh: "支持 7 天退货，一年质保。" },
      score_rating: 4.9,
      score_agreement: 4.8,
      score_service: 4.9,
      score_speed: 4.7,
    },
  },
  {
    slug: "aurora-digital",
    name: { en: "Aurora Digital", zh: "极光数码" },
    owner: { email: "aurora@vmall.local", password: "shop12345", displayName: "Aurora Owner" },
    profile: {
      logo: "/mock/store-2.svg",
      banner: "/mock/banner-2.svg",
      company: "Aurora Technology Co., Ltd.",
      region: "New York",
      address: { en: "88 Hudson Yards, New York", zh: "纽约哈德逊城市广场 88 号" },
      notice: { en: "Same-day dispatch before 3 PM.", zh: "下午 3 点前下单当天发货。" },
      after_sale: { en: "Nationwide warranty, support 9:00-21:00.", zh: "全国联保，客服 9:00-21:00。" },
      score_rating: 4.7,
      score_agreement: 4.6,
      score_service: 4.8,
      score_speed: 4.6,
    },
  },
  {
    slug: "nordwind-home",
    name: { en: "Nordwind Home", zh: "北风家居" },
    owner: { email: "nordwind@vmall.local", password: "shop12345", displayName: "Nordwind Owner" },
    profile: {
      logo: "/mock/store-3.svg",
      banner: "/mock/banner-3.svg",
      company: "Nordwind Trading LLC",
      region: "Texas",
      address: { en: "1200 Congress Avenue, Austin", zh: "奥斯汀国会大道 1200 号" },
      notice: { en: "Free installation on large appliances.", zh: "大家电免费上门安装。" },
      after_sale: { en: "30-day returns on unopened goods.", zh: "未拆封商品 30 天可退。" },
      score_rating: 4.8,
      score_agreement: 4.7,
      score_service: 4.6,
      score_speed: 4.8,
    },
  },
  {
    slug: "terra-grocery",
    name: { en: "Terra Grocery", zh: "大地生鲜" },
    owner: { email: "terra@vmall.local", password: "shop12345", displayName: "Terra Owner" },
    profile: {
      logo: "/mock/store-4.svg",
      banner: "/mock/promo-1.svg",
      company: "Terra Foods Inc.",
      region: "Oregon",
      address: { en: "45 Willamette Loop, Portland", zh: "波特兰威拉米特环路 45 号" },
      notice: { en: "Cold-chain delivery, next-day slots.", zh: "全程冷链，次日达时段可选。" },
      after_sale: { en: "Fresh items refunded on delivery issues.", zh: "生鲜配送问题可直接退款。" },
      score_rating: 4.6,
      score_agreement: 4.5,
      score_service: 4.7,
      score_speed: 4.5,
    },
  },
];

/** Create the shop if missing and return a token for its owner. */
async function ensureShop(def) {
  let shopId;
  r = await call("POST", "/admin/shops", {
    token: admin,
    body: { name: def.name, slug: def.slug },
  });
  if (r.status === 201) shopId = r.data.id;
  else if (r.status === 409) {
    const shops = await call("GET", "/admin/shops", { token: admin });
    shopId = shops.data.find((s) => s.slug === def.slug).id;
  } else fail(`create shop ${def.slug}`, r);

  // Upsert, so re-running the seed refreshes the profile rather than failing.
  r = await call("PUT", `/admin/shops/${shopId}/profile`, {
    token: admin,
    body: def.profile,
  });
  if (r.status !== 200) fail(`shop profile ${def.slug}`, r);

  await call("POST", "/auth/register", {
    body: {
      email: def.owner.email,
      password: def.owner.password,
      display_name: def.owner.displayName,
    },
  });
  r = await call("POST", "/auth/login", {
    body: { email: def.owner.email, password: def.owner.password },
  });
  if (r.status !== 200) fail(`owner login ${def.owner.email}`, r);
  let token = r.data.token;

  const ownsThisShop = r.data.user.role === "shop_owner" && r.data.user.shop_id === shopId;
  if (!ownsThisShop) {
    r = await call("PUT", `/admin/users/${r.data.user.id}/role`, {
      token: admin,
      body: { role: "shop_owner", shop_id: shopId },
    });
    if (r.status !== 200) fail(`assign owner ${def.slug}`, r);
    r = await call("POST", "/auth/login", {
      body: { email: def.owner.email, password: def.owner.password },
    });
    if (r.status !== 200) fail(`owner re-login ${def.owner.email}`, r);
    token = r.data.token;
  }
  console.log(`shop ready: ${def.slug}`);
  return token;
}

const ownerTokens = new Map();
for (const def of SHOPS) {
  ownerTokens.set(def.slug, await ensureShop(def));
}

// 2b. shop coupons: deterministic, idempotent by localized title.
const DEMO_COUPONS = [
  { title: { en: "$5 off over $59", zh: "满 59 减 5" }, amount_minor: 500, threshold_minor: 5900, stock: 200 },
  { title: { en: "$15 off over $199", zh: "满 199 减 15" }, amount_minor: 1500, threshold_minor: 19900, stock: 100 },
];
let demoShopId = "";
{
  const owner = ownerTokens.get("demo-store");
  const profile = await call("GET", "/shop/profile", { token: owner });
  if (profile.status !== 200) fail("coupon shop profile", profile);
  demoShopId = profile.data.id;

  const listed = await call("GET", "/shop/coupon-templates", { token: owner });
  if (listed.status !== 200) fail("list coupon templates", listed);
  const known = new Set(listed.data.map((t) => t.title.en));
  const starts_at = new Date(Date.now() - 24 * 3600 * 1000).toISOString();
  const ends_at = new Date(Date.now() + 365 * 24 * 3600 * 1000).toISOString();
  for (const coupon of DEMO_COUPONS) {
    if (known.has(coupon.title.en)) continue;
    const res = await call("POST", "/shop/coupon-templates", {
      token: owner,
      body: { ...coupon, currency: "USD", enabled: true, starts_at, ends_at },
    });
    if (res.status !== 201) fail(`seed coupon ${coupon.title.en}`, res);
  }
  console.log(`coupons ready: ${DEMO_COUPONS.length}`);
}

// 3. demo customer
await call("POST", "/auth/register", {
  body: { email: "customer@vmall.local", password: "customer123", display_name: "Demo Customer" },
});
{
  r = await call("POST", "/auth/login", {
    body: { email: "customer@vmall.local", password: "customer123" },
  });
  if (r.status !== 200) fail("customer login", r);
  const customerToken = r.data.token;
  const existing = (await call("GET", "/addresses", { token: customerToken })).data;
  if (Array.isArray(existing) && existing.length === 0) {
    const demoAddresses = [
      { recipient: "Demo Customer", phone: "+1 555 0100", country: "US", region: "California", city: "Cupertino", line1: "1 Infinite Loop", postal_code: "95014", is_default: true },
      { recipient: "Demo Customer", phone: "+1 555 0100", country: "US", region: "New York", city: "New York", line1: "88 Fifth Ave", postal_code: "10011" },
    ];
    for (const address of demoAddresses) {
      r = await call("POST", "/addresses", { token: customerToken, body: address });
      if (r.status !== 200 && r.status !== 201) fail("seed address", r);
    }
  }

  // Claim the demo shop's coupons so the buyer starts with live ones.
  const claimable = (await call("GET", `/shops/${demoShopId}/coupon-templates`)).data;
  if (Array.isArray(claimable)) {
    for (const template of claimable) {
      const res = await call("POST", "/me/coupons", {
        token: customerToken,
        body: { template_id: template.id },
      });
      // 409 means a previous seed run already claimed it.
      if (res.status !== 201 && res.status !== 409) fail(`claim coupon ${template.id}`, res);
    }
  }
}

// 4. categories (reference data from the migrations)
const cats = (await call("GET", "/categories")).data;
const catBy = (slug) => cats.find((c) => c.slug === slug)?.id ?? null;
if (cats.length < 7) {
  console.error(`expected the seeded category tree, found ${cats.length} categories`);
  process.exit(1);
}

// 5. products: 24 across 4 shops, covering all six top-level categories so
//    every home floor is non-empty.
const products = [
  // demo-store
  { shop: "demo-store", slug: "wireless-headphones", category: "electronics-audio", price: 7999, stock: 25, name: { en: "Wireless Headphones", zh: "无线耳机" }, description: { en: "Noise-cancelling over-ear headphones with 40h battery.", zh: "降噪头戴式耳机，40 小时续航。" }, img: "headphones" },
  { shop: "demo-store", slug: "mechanical-keyboard", category: "computers-keyboards", price: 12900, stock: 40, name: { en: "Mechanical Keyboard", zh: "机械键盘" }, description: { en: "Hot-swappable 75% keyboard, gasket mount.", zh: "热插拔 75% 配列机械键盘，Gasket 结构。" }, img: "keyboard" },
  { shop: "demo-store", slug: "linen-shirt", category: "fashion-shirts", price: 4599, stock: 60, name: { en: "Linen Shirt", zh: "亚麻衬衫" }, description: { en: "Breathable 100% linen shirt.", zh: "透气纯亚麻衬衫。" }, img: "shirt" },
  { shop: "demo-store", slug: "ceramic-mug", category: "home-cookers", price: 1999, stock: 100, name: { en: "Ceramic Mug", zh: "陶瓷马克杯" }, description: { en: "Hand-glazed 350ml mug.", zh: "手工上釉 350ml 马克杯。" }, img: "mug" },
  { shop: "demo-store", slug: "canvas-backpack", category: "fashion-backpacks", price: 3999, stock: 45, name: { en: "Canvas Backpack", zh: "帆布双肩包" }, description: { en: "Water-resistant 22L everyday backpack.", zh: "防泼水 22L 通勤双肩包。" }, img: "backpack" },
  { shop: "demo-store", slug: "merino-sweater", category: "fashion-menswear", price: 6900, stock: 30, name: { en: "Merino Sweater", zh: "美利奴羊毛衫" }, description: { en: "Fine-gauge merino crew neck.", zh: "细针美利奴圆领毛衣。" }, img: "sweater" },

  // aurora-digital
  { shop: "aurora-digital", slug: "aurora-x1-pro", category: "electronics-flagship", price: 99900, stock: 12, name: { en: "Aurora X1 Pro", zh: "Aurora X1 Pro 旗舰手机" }, description: { en: "6.7in flagship with triple camera and 120Hz display.", zh: "6.7 英寸三摄旗舰，120Hz 屏幕。" }, img: "aurora-x1" },
  { shop: "aurora-digital", slug: "aurora-a3", category: "electronics-budget", price: 19900, stock: 60, name: { en: "Aurora A3", zh: "Aurora A3 手机" }, description: { en: "Everyday 5G phone with 5000mAh battery.", zh: "日常 5G 手机，5000mAh 电池。" }, img: "aurora-a3" },
  { shop: "aurora-digital", slug: "aurora-buds-air", category: "electronics-earbuds", price: 12900, stock: 80, name: { en: "Aurora Buds Air", zh: "Aurora Buds Air 耳机" }, description: { en: "Active noise cancelling true wireless earbuds.", zh: "主动降噪真无线耳机。" }, img: "aurora-buds" },
  { shop: "aurora-digital", slug: "aurora-boom-speaker", category: "electronics-speakers", price: 8900, stock: 35, name: { en: "Aurora Boom Speaker", zh: "Aurora Boom 音箱" }, description: { en: "Portable IPX7 speaker with 20h playback.", zh: "IPX7 防水便携音箱，20 小时播放。" }, img: "aurora-boom" },
  { shop: "aurora-digital", slug: "aurora-ultrabook-14", category: "computers-ultrabooks", price: 129900, stock: 18, name: { en: "Aurora Ultrabook 14", zh: "Aurora 轻薄本 14" }, description: { en: "1.1kg magnesium chassis with 14in OLED panel.", zh: "1.1kg 镁合金机身，14 英寸 OLED 屏。" }, img: "aurora-ultrabook" },
  { shop: "aurora-digital", slug: "aurora-27-monitor", category: "computers-monitors", price: 34900, stock: 22, name: { en: "Aurora 27 Monitor", zh: "Aurora 27 英寸显示器" }, description: { en: "27in 4K USB-C monitor with 90W power delivery.", zh: "27 英寸 4K USB-C 显示器，90W 反向供电。" }, img: "aurora-monitor" },

  // nordwind-home
  { shop: "nordwind-home", slug: "nordwind-rice-cooker", category: "home-cookers", price: 8900, stock: 50, name: { en: "Nordwind Rice Cooker", zh: "北风智能电饭煲" }, description: { en: "IH rice cooker with 12 presets.", zh: "IH 电磁加热，12 种预设菜单。" }, img: "nordwind-cooker" },
  { shop: "nordwind-home", slug: "nordwind-blender-pro", category: "home-blenders", price: 15900, stock: 28, name: { en: "Nordwind Blender Pro", zh: "北风破壁机 Pro" }, description: { en: "1400W high-speed blender with vacuum jar.", zh: "1400W 高速破壁机，配真空杯。" }, img: "nordwind-blender" },
  { shop: "nordwind-home", slug: "nordwind-stick-vacuum", category: "home-vacuums", price: 24900, stock: 24, name: { en: "Nordwind Stick Vacuum", zh: "北风无线吸尘器" }, description: { en: "Cordless vacuum with 60min runtime.", zh: "无线手持吸尘器，续航 60 分钟。" }, img: "nordwind-vacuum" },
  { shop: "nordwind-home", slug: "nordwind-air-purifier", category: "home-purifiers", price: 32900, stock: 20, name: { en: "Nordwind Air Purifier", zh: "北风空气净化器" }, description: { en: "HEPA 13 purifier covering 60 square metres.", zh: "HEPA 13 滤网，适用 60 平方米。" }, img: "nordwind-purifier" },
  { shop: "nordwind-home", slug: "nordwind-serum-c", category: "beauty-serums", price: 4900, stock: 70, name: { en: "Nordwind Vitamin C Serum", zh: "北风维C精华" }, description: { en: "15% vitamin C brightening serum.", zh: "15% 维C 提亮精华。" }, img: "nordwind-serum" },
  { shop: "nordwind-home", slug: "nordwind-shave-9000", category: "beauty-shavers", price: 7900, stock: 40, name: { en: "Nordwind Shaver 9000", zh: "北风剃须刀 9000" }, description: { en: "Wet and dry rotary shaver with travel case.", zh: "干湿两用旋转剃须刀，含旅行盒。" }, img: "nordwind-shaver" },

  // terra-grocery
  { shop: "terra-grocery", slug: "terra-mixed-nuts", category: "grocery-nuts", price: 1599, stock: 200, name: { en: "Terra Mixed Nuts", zh: "大地混合坚果" }, description: { en: "Roasted unsalted nut mix, 500g.", zh: "烘烤无盐混合坚果，500g。" }, img: "terra-nuts" },
  { shop: "terra-grocery", slug: "terra-dark-chocolate", category: "grocery-chocolate", price: 1299, stock: 180, name: { en: "Terra Dark Chocolate", zh: "大地黑巧克力" }, description: { en: "72% single-origin dark chocolate.", zh: "72% 单一产地黑巧克力。" }, img: "terra-chocolate" },
  { shop: "terra-grocery", slug: "terra-orchard-apples", category: "grocery-fruit", price: 899, stock: 300, name: { en: "Terra Orchard Apples", zh: "大地果园苹果" }, description: { en: "Crisp orchard apples, 1kg box.", zh: "脆甜果园苹果，1kg 装。" }, img: "terra-apples" },
  { shop: "terra-grocery", slug: "terra-organic-kale", category: "grocery-vegetables", price: 699, stock: 260, name: { en: "Terra Organic Kale", zh: "大地有机羽衣甘蓝" }, description: { en: "Certified organic kale, 400g.", zh: "有机认证羽衣甘蓝，400g。" }, img: "terra-kale" },
  { shop: "terra-grocery", slug: "terra-carry-on", category: "fashion-luggage", price: 42900, stock: 16, name: { en: "Terra Carry-On", zh: "大地登机箱" }, description: { en: "Polycarbonate carry-on with TSA lock.", zh: "聚碳酸酯登机箱，TSA 密码锁。" }, img: "terra-carryon" },
  { shop: "terra-grocery", slug: "terra-leather-tote", category: "fashion-bags", price: 21900, stock: 26, name: { en: "Terra Leather Tote", zh: "大地真皮托特包" }, description: { en: "Full-grain leather tote with laptop sleeve.", zh: "头层牛皮托特包，含电脑隔层。" }, img: "terra-tote" },
];

// 5b. brands (admin-managed reference data), then assign one per product
const BRANDS = [
  { slug: "aurora", name: { en: "Aurora", zh: "极光" } },
  { slug: "nordwind", name: { en: "Nordwind", zh: "北风" } },
  { slug: "hexon", name: { en: "Hexon", zh: "赫克森" } },
  { slug: "mikado", name: { en: "Mikado", zh: "御门" } },
  { slug: "solace", name: { en: "Solace", zh: "索莱斯" } },
  { slug: "terra", name: { en: "Terra", zh: "大地" } },
];
r = await call("PUT", "/admin/brands", { token: admin, body: BRANDS });
if (r.status !== 200) fail("replace brands", r);
// Captured, not read back through `r`: the product loop reassigns `r`.
const brandList = r.data;
const brandBy = (slug) => brandList.find((b) => b.slug === slug)?.id ?? null;
const SHOP_BRAND = {
  "demo-store": "solace",
  "aurora-digital": "aurora",
  "nordwind-home": "nordwind",
  "terra-grocery": "terra",
};
// A couple of deliberate exceptions so more than four brands are in use.
const PRODUCT_BRAND = { "mechanical-keyboard": "hexon", "terra-leather-tote": "mikado" };
console.log(`brands ready: ${r.data.length}`);

for (const p of products) {
  const token = ownerTokens.get(p.shop);
  const body = {
    slug: p.slug,
    name: p.name,
    description: p.description,
    category_id: catBy(p.category),
    brand_id: brandBy(PRODUCT_BRAND[p.slug] ?? SHOP_BRAND[p.shop]),
    images: [`https://picsum.photos/seed/${p.img}/600/600`],
  };
  r = await call("POST", "/shop/products", { token, body });
  let id;
  if (r.status === 201) id = r.data.id;
  else if (r.status === 409) {
    const list = await call("GET", "/shop/products?per_page=100", { token });
    id = list.data.items.find((x) => x.slug === p.slug)?.id;
    if (!id) fail(`lookup product ${p.slug}`, r);
    // Re-apply the body so a re-run converges the brand assignment too.
    r = await call("PUT", `/shop/products/${id}`, { token, body });
    if (r.status !== 200) fail(`update product ${p.slug}`, r);
  } else fail(`create product ${p.slug}`, r);

  r = await call("POST", `/shop/products/${id}/skus`, {
    token,
    body: {
      sku_code: `${p.slug}-std`,
      price_minor: p.price,
      currency: "USD",
      stock: p.stock,
    },
  });
  if (r.status !== 200) fail(`sku ${p.slug}`, r);
  r = await call("POST", `/shop/products/${id}/publish`, { token });
  if (r.status !== 200) fail(`publish ${p.slug}`, r);
}
console.log(`products ready: ${products.length} across ${SHOPS.length} shops`);

// 6. points mall products (idempotent by English name). The demo customer's
//    spendable points are credited by the API through the account ledger.
const POINTS_PRODUCTS = [
  { name: { en: "Insulated Mug", zh: "保温杯" }, image: "/mock/product-9.svg", points_price: 1200, stock: 300 },
  { name: { en: "Canvas Tote", zh: "帆布手提袋" }, image: "/mock/product-15.svg", points_price: 600, stock: 500 },
  { name: { en: "Phone Stand", zh: "手机支架" }, image: "/mock/product-7.svg", points_price: 400, stock: 800 },
  { name: { en: "Cable Organizer Set", zh: "数据线收纳套装" }, image: "/mock/product-3.svg", points_price: 300, stock: 1000 },
  { name: { en: "Notebook A5", zh: "A5 笔记本" }, image: "/mock/product-14.svg", points_price: 250, stock: 1200 },
];
{
  const listed = await call("GET", "/admin/points/products", { token: admin });
  if (listed.status !== 200) fail("list points products", listed);
  const known = new Set(listed.data.map((p) => p.name.en));
  let created = 0;
  for (const [index, product] of POINTS_PRODUCTS.entries()) {
    if (known.has(product.name.en)) continue;
    const res = await call("POST", "/admin/points/products", {
      token: admin,
      body: { ...product, position: index, published: true, recommend: index < 2 },
    });
    if (res.status !== 201) fail(`seed points product ${product.name.en}`, res);
    created += 1;
  }
  console.log(`points products ready: ${POINTS_PRODUCTS.length} (${created} new)`);
}

// 7. an active flash sale for the demo shop (idempotent by English label).
{
  const owner = ownerTokens.get("demo-store");
  const listed = await call("GET", "/shop/flash-sales", { token: owner });
  if (listed.status !== 200) fail("list flash sales", listed);
  const known = new Set(listed.data.map((s) => s.label.en));
  if (!known.has("Weekend flash sale")) {
    const products = await call("GET", "/shop/products?per_page=100", { token: owner });
    if (products.status !== 200) fail("list shop products", products);
    const sku = (products.data.items ?? [])
      .flatMap((p) => p.skus ?? [])
      .find((s) => s.active && s.stock > 0);
    if (!sku) fail("find a flash-sale SKU", { status: 0, data: "no active SKU" });

    const now = Date.now();
    const session = await call("POST", "/shop/flash-sales", {
      token: owner,
      body: {
        label: { en: "Weekend flash sale", zh: "周末秒杀" },
        starts_at: new Date(now - 3600 * 1000).toISOString(),
        ends_at: new Date(now + 7 * 24 * 3600 * 1000).toISOString(),
        enabled: true,
      },
    });
    if (session.status !== 201) fail("seed flash session", session);

    const item = await call("POST", `/shop/flash-sales/${session.data.id}/items`, {
      token: owner,
      body: {
        sku_id: sku.id,
        sale_price_minor: Math.max(1, Math.round(sku.price_minor * 0.6)),
        currency: sku.currency,
        reserved_stock: 20,
        per_customer_limit: 2,
      },
    });
    if (item.status !== 201) fail("seed flash item", item);
  }
  console.log("flash sale ready");
}

// 8. an active group-buying activity for the demo shop (idempotent by name).
{
  const owner = ownerTokens.get("demo-store");
  const listed = await call("GET", "/shop/group-buying-activities", { token: owner });
  if (listed.status !== 200) fail("list group activities", listed);
  const known = new Set(listed.data.map((a) => a.name.en));
  if (!known.has("Weekend group deal")) {
    const products = await call("GET", "/shop/products?per_page=100", { token: owner });
    if (products.status !== 200) fail("list shop products", products);
    const flash = await call("GET", "/shop/flash-sales", { token: owner });
    const flashSkus = new Set(
      (flash.data ?? []).flatMap((s) => s.items ?? []).map((i) => i.sku_id),
    );
    const used = new Set(listed.data.map((a) => a.sku_id));
    // A SKU already in an overlapping flash sale cannot join a group activity.
    const sku = (products.data.items ?? [])
      .flatMap((p) => p.skus ?? [])
      .find((s) => s.active && s.stock > 0 && !flashSkus.has(s.id) && !used.has(s.id));
    if (!sku) fail("find a group-buying SKU", { status: 0, data: "no free SKU" });

    const now = Date.now();
    const res = await call("POST", "/shop/group-buying-activities", {
      token: owner,
      body: {
        sku_id: sku.id,
        name: { en: "Weekend group deal", zh: "周末拼团" },
        description: {
          en: "Gather two friends to unlock the group price.",
          zh: "两人成团，享拼团价。",
        },
        group_price_minor: Math.max(1, Math.round(sku.price_minor * 0.75)),
        currency: sku.currency,
        required_members: 2,
        starts_at: new Date(now - 3600 * 1000).toISOString(),
        ends_at: new Date(now + 7 * 24 * 3600 * 1000).toISOString(),
        group_lifetime_hours: 24,
        enabled: true,
      },
    });
    if (res.status !== 201) fail("seed group activity", res);
  }
  console.log("group buying ready");
}

console.log("\nDemo data seeded.");
console.log("  platform admin : admin@vmall.local / admin1234   (apps/admin :3002)");
console.log("  shop owner     : shop@vmall.local / shop12345    (apps/shop-admin :3001)");
console.log("  customer       : customer@vmall.local / customer123 (apps/mall :3000)");
console.log("  extra owners   : aurora@ / nordwind@ / terra@vmall.local (password shop12345)");