rules:

  # INFO / METADATA
  info-title-pattern:
    description: API info title should start with "RICOH THETA".
    severity: warn
    given: $.info.title
    then:
      function: pattern
      functionOptions:
        match: "^RICOH THETA "

  info-description-required:
    description: API info description must be present and at least 50 characters.
    severity: warn
    given: $.info
    then:
      field: description
      function: minLength
      functionOptions:
        value: 50

  info-version-required:
    description: API version must be defined.
    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 — THETA Web API is LAN-only, so HTTPS is not required;
  # we instead require that the server uses an IP address or local hostname.
  servers-must-be-defined:
    description: Servers array must be defined and non-empty.
    severity: error
    given: $
    then:
      field: servers
      function: truthy

  servers-description-required:
    description: Each server must have a description.
    severity: warn
    given: $.servers[*]
    then:
      field: description
      function: truthy

  # PATHS — OSC NAMING CONVENTIONS
  paths-osc-prefix:
    description: All paths should live under /osc/ (OSC Level 2 convention).
    severity: error
    given: $.paths
    then:
      function: pattern
      functionOptions:
        match: "^/osc/"

  paths-no-trailing-slash:
    description: Paths must not end with a trailing slash.
    severity: warn
    given: $.paths
    then:
      function: pattern
      functionOptions:
        notMatch: ".+/$"

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

  operation-summary-title-case:
    description: Operation summaries should be in Title Case.
    severity: warn
    given: $.paths[*][get,post,put,patch,delete].summary
    then:
      function: pattern
      functionOptions:
        match: "^([A-Z][a-z0-9]*)( [A-Z][a-z0-9]*)*( [A-Z]+)?$"

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

  operation-operationid-required:
    description: Every operation must have an operationId.
    severity: error
    given: $.paths[*][get,post,put,patch,delete]
    then:
      field: operationId
      function: truthy

  operation-operationid-camelcase:
    description: OperationId should use camelCase.
    severity: warn
    given: $.paths[*][get,post,put,patch,delete].operationId
    then:
      function: pattern
      functionOptions:
        match: "^[a-z][a-zA-Z0-9]*$"

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

  # OSC COMMAND ENVELOPE
  command-execute-uses-post:
    description: /osc/commands/execute must be POST only (per OSC spec).
    severity: error
    given: $.paths['/osc/commands/execute']
    then:
      field: post
      function: truthy

  command-status-uses-post:
    description: /osc/commands/status must be POST only (per OSC spec).
    severity: error
    given: $.paths['/osc/commands/status']
    then:
      field: post
      function: truthy

  # TAGS
  tag-description-required:
    description: Global tags must have descriptions.
    severity: warn
    given: $.tags[*]
    then:
      field: description
      function: truthy

  # REQUEST BODIES
  request-body-json-content:
    description: Request bodies must declare application/json content.
    severity: error
    given: $.paths[*][post,put,patch].requestBody.content
    then:
      field: application/json
      function: truthy

  # RESPONSES
  response-success-required:
    description: Every operation must define at least one success response.
    severity: error
    given: $.paths[*][get,post,put,patch,delete].responses
    then:
      function: schema
      functionOptions:
        schema:
          type: object
          minProperties: 1

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

  # SCHEMAS
  schema-description-required:
    description: Component schemas must have descriptions.
    severity: warn
    given: $.components.schemas[*]
    then:
      field: description
      function: truthy

  schema-type-required:
    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.
    severity: warn
    given: $..description
    then:
      function: truthy