{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://api.buywhere.ai/schema/offer.json",
  "title": "BuyWhere Offer",
  "description": "An offer/listing for a product on a specific merchant (Schema.org Offer-compatible).",
  "type": "object",
  "required": ["product_id", "domain", "price", "currency", "url"],
  "properties": {
    "product_id": { "type": "string", "format": "uuid" },
    "domain": {
      "type": "string",
      "description": "Merchant platform.",
      "examples": ["shopee", "lazada", "amazon", "walmart", "carousell", "best_denki"]
    },
    "merchant_name": { "type": "string" },
    "url": { "type": "string", "format": "uri" },
    "price": { "type": "number", "minimum": 0 },
    "original_price": { "type": "number" },
    "discount_pct": { "type": "number", "minimum": 0, "maximum": 100 },
    "currency": { "type": "string" },
    "country_code": { "type": "string" },
    "availability": {
      "type": "string",
      "enum": ["in_stock", "out_of_stock", "preorder", "limited"]
    },
    "shipping": {
      "type": "object",
      "properties": {
        "free": { "type": "boolean" },
        "cost": { "type": "number" },
        "currency": { "type": "string" },
        "estimated_days_min": { "type": "integer" },
        "estimated_days_max": { "type": "integer" }
      }
    },
    "rating": { "type": "number" },
    "review_count": { "type": "integer" },
    "updated_at": { "type": "string", "format": "date-time" }
  }
}