extends: spectral:oas
rules:

  # Require operationId on every operation
  operation-operationId:
    description: Every operation must have a unique operationId.
    severity: error
    given: "$.paths.*[get,post,put,patch,delete,options,head]"
    then:
      field: operationId
      function: truthy

  # Require operation summary in Title Case
  operation-summary-title-case:
    description: Operation summaries must use Title Case.
    message: "Summary '{{value}}' should be in Title Case."
    severity: warn
    given: "$.paths.*[get,post,put,patch,delete].summary"
    then:
      function: pattern
      functionOptions:
        match: "^[A-Z][a-zA-Z0-9 ]*$"

  # Require tags on every operation
  operation-tags:
    description: Every operation must include at least one tag.
    severity: warn
    given: "$.paths.*[get,post,put,patch,delete]"
    then:
      field: tags
      function: truthy

  # Require description on every operation
  operation-description:
    description: Every operation must have a description.
    severity: warn
    given: "$.paths.*[get,post,put,patch,delete]"
    then:
      field: description
      function: truthy

  # Paths must use kebab-case
  path-kebab-case:
    description: Path segments must use kebab-case (lowercase with hyphens).
    severity: warn
    given: "$.paths[*]~"
    then:
      function: pattern
      functionOptions:
        match: "^(/[a-z0-9{}-]+)+$"

  # Paths must not have a trailing slash
  path-no-trailing-slash:
    description: Paths must not end with a trailing slash.
    severity: error
    given: "$.paths[*]~"
    then:
      function: pattern
      functionOptions:
        notMatch: ".+/$"

  # All response codes must have descriptions
  response-descriptions:
    description: All response status codes must include a description.
    severity: warn
    given: "$.paths.*[get,post,put,patch,delete].responses.*"
    then:
      field: description
      function: truthy

  # API must use API key authentication (Total Control platform)
  security-apikey-required:
    description: United Rentals APIs require X-API-Key authentication. Security must be defined on all operations.
    severity: error
    given: "$.paths.*[get,post,put,patch,delete]"
    then:
      field: security
      function: truthy

  # POST/PUT/PATCH must have a requestBody
  operation-request-body-required:
    description: POST, PUT, and PATCH operations should have a requestBody.
    severity: warn
    given: "$.paths.*[post,put,patch]"
    then:
      field: requestBody
      function: truthy

  # Rental dates must use ISO 8601 date format
  date-field-format:
    description: Date fields must use format date (ISO 8601 YYYY-MM-DD).
    severity: error
    given: "$.components.schemas.*[*]"
    then:
      function: schema
      functionOptions:
        schema:
          if:
            properties:
              type:
                const: string
            required: [type]
          then:
            not:
              properties:
                description:
                  pattern: "date"

  # Purchase order number is required for rental creation
  rental-purchase-order-required:
    description: Rental creation requires a purchaseOrderNumber for ERP integration.
    severity: error
    given: "$.components.schemas.RentalRequest.required"
    then:
      function: schema
      functionOptions:
        schema:
          type: array
          contains:
            const: purchaseOrderNumber

  # API info must include contact information
  info-contact:
    description: API info must include contact information.
    severity: warn
    given: "$.info"
    then:
      field: contact
      function: truthy

  # Servers must be defined
  servers-defined:
    description: API must define at least one server.
    severity: error
    given: "$"
    then:
      field: servers
      function: truthy

  # Parameters must have descriptions
  parameter-description:
    description: All parameters must have a description.
    severity: warn
    given: "$.paths.*[get,post,put,patch,delete].parameters.*"
    then:
      field: description
      function: truthy

  # Equipment rental rates must include daily, weekly, and monthly
  equipment-rate-completeness:
    description: Equipment schemas should define dailyRate, weeklyRate, and monthlyRate.
    severity: warn
    given: "$.components.schemas.Equipment.properties"
    then:
      function: schema
      functionOptions:
        schema:
          required: [dailyRate, weeklyRate, monthlyRate]