rules:

  # INFO / METADATA
  info-title-required:
    description: Info must have a title
    severity: error
    given: $.info
    then:
      field: title
      function: truthy

  info-description-required:
    description: Info must have a description
    severity: warn
    given: $.info
    then:
      field: description
      function: truthy

  info-version-required:
    description: Info must have a version
    severity: error
    given: $.info
    then:
      field: version
      function: truthy

  # OPENAPI VERSION
  openapi-version-3:
    description: Must use OpenAPI 3.x
    severity: error
    given: $
    then:
      field: openapi
      function: pattern
      functionOptions:
        match: "^3\\."

  # SERVERS
  servers-required:
    description: Servers array must be defined
    severity: error
    given: $
    then:
      field: servers
      function: truthy

  servers-https-only:
    description: All server URLs must use HTTPS
    severity: warn
    given: $.servers[*].url
    then:
      function: pattern
      functionOptions:
        match: "^https://"

  # PATHS — NAMING CONVENTIONS
  paths-kebab-case:
    description: Path segments must use kebab-case or snake_case
    severity: info
    given: $.paths[*]~
    then:
      function: pattern
      functionOptions:
        match: "^(\\/[a-z0-9{}_,\\-\\/]*)*$"

  paths-no-trailing-slash:
    description: Paths must not have trailing slashes
    severity: warn
    given: $.paths[*]~
    then:
      function: pattern
      functionOptions:
        notMatch: "\\/$"

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

  operation-summary-weatherbit-prefix:
    description: Operation summaries must start with Weatherbit
    message: "Summary must start with 'Weatherbit': {{value}}"
    severity: info
    given: $.paths[*][get,post,put,delete,patch].summary
    then:
      function: pattern
      functionOptions:
        match: "^Weatherbit"

  operation-tags-required:
    description: Operations must have at least one tag
    severity: warn
    given: $.paths[*][get,post,put,delete,patch]
    then:
      field: tags
      function: truthy

  # PARAMETERS
  parameter-description-required:
    description: Every parameter should have a description
    severity: warn
    given: $.paths[*][get,post,put,delete,patch].parameters[*]
    then:
      field: description
      function: truthy

  parameter-api-key-in-query:
    description: API key parameter must be named 'key'
    message: "API key parameter should be named 'key'"
    severity: info
    given: $.paths[*][get,post,put,delete,patch].parameters[?(@.name == 'key')]
    then:
      field: in
      function: enumeration
      functionOptions:
        values: [query]

  # RESPONSES
  response-success-required:
    description: Every operation must have a 2xx success response
    severity: error
    given: $.paths[*][get,post,put,delete,patch].responses
    then:
      function: schema
      functionOptions:
        schema:
          minProperties: 1

  response-description-required:
    description: Every response must have a description
    severity: warn
    given: $.paths[*][get,post,put,delete,patch].responses[*]
    then:
      field: description
      function: truthy

  # SCHEMAS
  schema-type-defined:
    description: Schemas should define a type
    severity: warn
    given: $.components.schemas[*]
    then:
      field: type
      function: truthy

  # HTTP METHOD CONVENTIONS
  get-no-request-body:
    description: GET operations must not have a request body
    severity: error
    given: $.paths[*].get
    then:
      field: requestBody
      function: falsy

  # GENERAL QUALITY
  no-empty-descriptions:
    description: Descriptions must not be empty strings
    severity: warn
    given: $..description
    then:
      function: pattern
      functionOptions:
        match: ".+"

  contact-info-recommended:
    description: Info should have contact details
    severity: info
    given: $.info
    then:
      field: contact
      function: truthy