{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/marketcheck/main/json-schema/marketcheck-listing.json",
  "title": "MarketCheck Listing",
  "description": "A vehicle listing from the MarketCheck automotive marketplace data platform",
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "description": "Unique listing identifier"
    },
    "vin": {
      "type": "string",
      "description": "17-character Vehicle Identification Number",
      "minLength": 17,
      "maxLength": 17,
      "pattern": "^[A-HJ-NPR-Z0-9]{17}$"
    },
    "heading": {
      "type": "string",
      "description": "Listing heading or title"
    },
    "price": {
      "type": "number",
      "description": "Listed price in USD",
      "minimum": 0
    },
    "miles": {
      "type": "integer",
      "description": "Odometer reading in miles",
      "minimum": 0
    },
    "msrp": {
      "type": "number",
      "description": "Manufacturer Suggested Retail Price in USD",
      "minimum": 0
    },
    "data_source": {
      "type": "string",
      "description": "Source of the listing data"
    },
    "source_url": {
      "type": "string",
      "format": "uri",
      "description": "URL to the original listing source"
    },
    "vdp_url": {
      "type": "string",
      "format": "uri",
      "description": "URL to the Vehicle Details Page"
    },
    "seller_type": {
      "type": "string",
      "description": "Type of seller",
      "enum": ["dealer", "private", "auction"]
    },
    "car_type": {
      "type": "string",
      "description": "Type of car listing",
      "enum": ["new", "used", "certified"]
    },
    "scraped_at": {
      "type": "integer",
      "description": "Unix timestamp when the listing was scraped"
    },
    "last_seen_at": {
      "type": "integer",
      "description": "Unix timestamp when the listing was last seen active"
    },
    "first_seen_at": {
      "type": "integer",
      "description": "Unix timestamp when the listing was first seen"
    },
    "dom": {
      "type": "integer",
      "description": "Days on market",
      "minimum": 0
    },
    "dom_180": {
      "type": "integer",
      "description": "Days on market in the last 180 days",
      "minimum": 0
    },
    "dom_active": {
      "type": "integer",
      "description": "Active days on market",
      "minimum": 0
    },
    "dealer_id": {
      "type": "string",
      "description": "Dealer identifier"
    },
    "stock_no": {
      "type": "string",
      "description": "Dealer stock number"
    },
    "inventory_type": {
      "type": "string",
      "description": "Inventory classification"
    },
    "ref_price": {
      "type": "number",
      "description": "Reference or comparison price"
    },
    "ref_miles": {
      "type": "number",
      "description": "Reference or comparison miles"
    },
    "ref_year": {
      "type": "integer",
      "description": "Reference year for comparison"
    },
    "build": {
      "$ref": "#/definitions/Build"
    },
    "dealer": {
      "$ref": "#/definitions/Dealer"
    }
  },
  "required": ["id", "vin"],
  "definitions": {
    "Build": {
      "type": "object",
      "description": "Vehicle build and specification information",
      "properties": {
        "year": {
          "type": "integer",
          "description": "Model year",
          "minimum": 1900,
          "maximum": 2100
        },
        "make": {
          "type": "string",
          "description": "Vehicle make (manufacturer)"
        },
        "model": {
          "type": "string",
          "description": "Vehicle model"
        },
        "trim": {
          "type": "string",
          "description": "Vehicle trim level"
        },
        "body_type": {
          "type": "string",
          "description": "Body style (Sedan, SUV, Truck, Coupe, etc.)"
        },
        "vehicle_type": {
          "type": "string",
          "description": "Vehicle type classification"
        },
        "transmission": {
          "type": "string",
          "description": "Transmission type"
        },
        "drivetrain": {
          "type": "string",
          "description": "Drivetrain configuration",
          "enum": ["FWD", "AWD", "RWD", "4WD", "4x4"]
        },
        "fuel_type": {
          "type": "string",
          "description": "Primary fuel type"
        },
        "engine": {
          "type": "string",
          "description": "Engine description string"
        },
        "engine_size": {
          "type": "string",
          "description": "Engine displacement size"
        },
        "cylinders": {
          "type": "integer",
          "description": "Number of engine cylinders"
        },
        "doors": {
          "type": "integer",
          "description": "Number of doors",
          "minimum": 2,
          "maximum": 6
        },
        "made_in": {
          "type": "string",
          "description": "Country of manufacture"
        },
        "highway_fuel_economy": {
          "type": "integer",
          "description": "Highway fuel economy in MPG"
        },
        "city_fuel_economy": {
          "type": "integer",
          "description": "City fuel economy in MPG"
        }
      }
    },
    "Dealer": {
      "type": "object",
      "description": "Dealer information",
      "properties": {
        "id": {
          "type": "string",
          "description": "Unique dealer identifier"
        },
        "name": {
          "type": "string",
          "description": "Dealer name"
        },
        "website": {
          "type": "string",
          "format": "uri",
          "description": "Dealer website URL"
        },
        "dealer_type": {
          "type": "string",
          "description": "Type of dealership"
        },
        "zip": {
          "type": "string",
          "description": "Dealer zip/postal code"
        },
        "city": {
          "type": "string",
          "description": "Dealer city"
        },
        "state": {
          "type": "string",
          "description": "Dealer state (2-letter US state code)"
        },
        "latitude": {
          "type": "number",
          "description": "Dealer geographic latitude",
          "minimum": -90,
          "maximum": 90
        },
        "longitude": {
          "type": "number",
          "description": "Dealer geographic longitude",
          "minimum": -180,
          "maximum": 180
        },
        "phone": {
          "type": "string",
          "description": "Dealer phone number"
        },
        "franchises": {
          "type": "array",
          "items": {
            "type": "string"
          },
          "description": "List of car makes/franchises carried by this dealer"
        }
      }
    }
  }
}