rules:

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

  info-title-format:
    description: API title should follow the "Absence.io ..." naming pattern.
    severity: warn
    given: $.info.title
    then:
      function: pattern
      functionOptions:
        match: "^Absence\\.io"

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

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

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

  # SERVERS
  servers-required:
    description: At least one server must be defined.
    severity: error
    given: $
    then:
      field: servers
      function: truthy

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

  # PATHS — NAMING CONVENTIONS
  paths-lowercase:
    description: Path segments should use lowercase with optional underscores.
    severity: warn
    given: $.paths
    then:
      function: pattern
      functionOptions:
        match: "^(/[a-z0-9_/-]+(\\{[a-zA-Z0-9_]+\\})?)*$"

  # 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-prefix:
    description: Operation summaries should start with "Absence.io".
    severity: warn
    given: $.paths[*][get,post,put,patch,delete].summary
    then:
      function: pattern
      functionOptions:
        match: "^Absence\\.io"

  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: OperationIds must 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

  # TAGS
  tags-array-defined:
    description: Global tags array should be defined.
    severity: warn
    given: $
    then:
      field: tags
      function: truthy

  tag-description-required:
    description: Each global tag should have a description.
    severity: warn
    given: $.tags[*]
    then:
      field: description
      function: truthy

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

  # RESPONSES
  response-success-required:
    description: Every operation must have at least one 2xx response.
    severity: error
    given: $.paths[*][get,post,put,patch,delete].responses
    then:
      function: schema
      functionOptions:
        schema:
          anyOf:
            - required: ['200']
            - required: ['201']
            - required: ['204']

  response-401-required:
    description: Every authenticated operation should have a 401 response.
    severity: warn
    given: $.paths[*][get,post,put,patch,delete].responses
    then:
      function: schema
      functionOptions:
        schema:
          required: ['401']

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

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

  schema-type-defined:
    description: All schemas should have a type defined.
    severity: warn
    given: $.components.schemas[*]
    then:
      field: type
      function: truthy

  schema-properties-snake-case:
    description: Schema property names should use snake_case or camelCase.
    severity: info
    given: $.components.schemas[*].properties
    then:
      function: schema
      functionOptions:
        schema:
          type: object

  # SECURITY
  security-schemes-defined:
    description: Security schemes must be defined in components.
    severity: error
    given: $.components
    then:
      field: securitySchemes
      function: truthy

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

  # ABSENCE.IO SPECIFIC — POST for listing
  list-operations-use-post:
    description: Absence.io uses POST for list operations (not GET). This is a provider-specific pattern.
    severity: info
    given: $.paths
    then:
      function: schema
      functionOptions:
        schema:
          type: object

  # PAGINATION
  list-request-skip-limit:
    description: List request bodies should include skip and limit for pagination.
    severity: info
    given: $.paths[*].post.requestBody.content.application/json.schema.properties
    then:
      function: schema
      functionOptions:
        schema:
          type: object

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

  examples-encouraged:
    description: Operations should have examples for better developer experience.
    severity: info
    given: $.paths[*][get,post,put,patch,delete].responses[*].content[*]
    then:
      function: schema
      functionOptions:
        schema:
          anyOf:
            - required: ['example']
            - required: ['examples']

  # MONGOOSE IDS
  id-field-naming:
    description: Absence.io uses MongoDB-style _id fields (not id). Ensure IDs follow this convention.
    severity: info
    given: $.components.schemas[*].properties
    then:
      function: schema
      functionOptions:
        schema:
          type: object