{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://api-evangelist.github.io/shipping/json-schema/shipping-rate-schema.json",
  "title": "Shipping Rate",
  "description": "Represents a shipping rate quote from a carrier as provided by the Shipping.com marketplace platform",
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "description": "Unique identifier for this rate quote"
    },
    "carrierId": {
      "type": "string",
      "description": "Identifier of the carrier providing this rate"
    },
    "carrierName": {
      "type": "string",
      "description": "Name of the carrier (e.g., Maersk, MSC, CMA CGM)"
    },
    "serviceLevel": {
      "type": "string",
      "description": "Service level or service type offered by the carrier",
      "enum": ["FCL", "LCL", "FCL-Reefer", "LCL-Reefer", "Breakbulk", "RoRo", "Air-Freight"]
    },
    "origin": {
      "$ref": "#/definitions/Port",
      "description": "Origin port or location"
    },
    "destination": {
      "$ref": "#/definitions/Port",
      "description": "Destination port or location"
    },
    "rate": {
      "type": "object",
      "description": "Rate information",
      "properties": {
        "amount": {
          "type": "number",
          "description": "Rate amount"
        },
        "currency": {
          "type": "string",
          "description": "Currency code (ISO 4217)",
          "default": "USD"
        },
        "unit": {
          "type": "string",
          "description": "Unit of measurement for the rate",
          "enum": ["per-TEU", "per-FEU", "per-ton", "per-cbm", "per-shipment", "per-kg"]
        }
      },
      "required": ["amount", "currency", "unit"]
    },
    "validFrom": {
      "type": "string",
      "format": "date",
      "description": "Date from which this rate is valid"
    },
    "validTo": {
      "type": "string",
      "format": "date",
      "description": "Date until which this rate is valid"
    },
    "transitTime": {
      "type": "integer",
      "description": "Estimated transit time in days"
    },
    "sailingFrequency": {
      "type": "string",
      "description": "Frequency of service (e.g., Weekly, Bi-weekly)"
    },
    "surcharges": {
      "type": "array",
      "description": "Additional surcharges applicable to this rate",
      "items": {
        "$ref": "#/definitions/Surcharge"
      }
    },
    "commodity": {
      "type": "string",
      "description": "Commodity or cargo type this rate applies to"
    },
    "createdAt": {
      "type": "string",
      "format": "date-time",
      "description": "Timestamp when this rate was created or received"
    }
  },
  "required": ["id", "carrierId", "carrierName", "origin", "destination", "rate", "validFrom", "validTo"],
  "definitions": {
    "Port": {
      "type": "object",
      "description": "Port or shipping location",
      "properties": {
        "unlocode": {
          "type": "string",
          "description": "UN/LOCODE for the port (e.g., USLAX for Los Angeles)"
        },
        "name": {
          "type": "string",
          "description": "Human-readable port name"
        },
        "country": {
          "type": "string",
          "description": "Two-letter ISO 3166-1 alpha-2 country code"
        },
        "region": {
          "type": "string",
          "description": "Geographic region (e.g., North America, Asia Pacific)"
        }
      },
      "required": ["unlocode", "name"]
    },
    "Surcharge": {
      "type": "object",
      "description": "A surcharge applied on top of the base freight rate",
      "properties": {
        "code": {
          "type": "string",
          "description": "Standard surcharge code (e.g., BAF, PSS, GRI, THC)"
        },
        "name": {
          "type": "string",
          "description": "Full name of the surcharge"
        },
        "amount": {
          "type": "number",
          "description": "Surcharge amount"
        },
        "currency": {
          "type": "string",
          "description": "Currency for this surcharge"
        },
        "unit": {
          "type": "string",
          "description": "Unit of measurement for this surcharge"
        }
      },
      "required": ["code", "name", "amount", "currency"]
    }
  }
}