rules:

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

  info-description-required:
    description: API info must have a description.
    severity: warn
    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-3:
    description: APIs should use OpenAPI 3.x specification.
    severity: warn
    given: "$"
    then:
      field: openapi
      function: pattern
      functionOptions:
        match: "^3\\."

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

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

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

  # PATHS — NAMING CONVENTIONS
  paths-no-trailing-slash:
    description: Path must not have a trailing slash.
    severity: warn
    given: "$.paths[*]~"
    then:
      function: pattern
      functionOptions:
        notMatch: "/$"

  paths-no-query-string:
    description: Path must not contain a query string.
    severity: error
    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,head,options]"
    then:
      field: summary
      function: truthy

  operation-summary-adyen-prefix:
    description: Operation summaries should start with "Adyen".
    severity: warn
    given: "$.paths[*][get,post,put,patch,delete,head,options].summary"
    then:
      function: pattern
      functionOptions:
        match: "^Adyen "

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

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

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

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

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

  parameter-schema-required:
    description: Every parameter must have a schema.
    severity: error
    given: "$.paths[*][get,post,put,patch,delete,head,options].parameters[*]"
    then:
      field: schema
      function: truthy

  parameter-api-key-in-header:
    description: API keys should be passed in headers, not query parameters.
    severity: warn
    given: "$.components.securitySchemes[?(@.type=='apiKey')]"
    then:
      field: in
      function: enumeration
      functionOptions:
        values:
          - header

  # REQUEST BODIES
  request-body-description:
    description: Request body should have a description.
    severity: info
    given: "$.paths[*][post,put,patch].requestBody"
    then:
      field: description
      function: truthy

  request-body-content-json:
    description: Request body should support application/json content type.
    severity: warn
    given: "$.paths[*][post,put,patch].requestBody.content"
    then:
      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]"
    then:
      field: responses
      function: truthy

  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

  response-401-defined:
    description: Operations with authentication should define a 401 response.
    severity: info
    given: "$.paths[*][get,post,put,patch,delete].responses"
    then:
      function: truthy

  # SCHEMAS — PROPERTY NAMING
  schema-description-required:
    description: Top-level schemas should have a description.
    severity: info
    given: "$.components.schemas[*]"
    then:
      field: description
      function: truthy

  schema-type-defined:
    description: Schema properties should define a type.
    severity: warn
    given: "$.components.schemas[*].properties[*]"
    then:
      field: type
      function: truthy

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

  security-scheme-description:
    description: Security schemes should have a description.
    severity: info
    given: "$.components.securitySchemes[*]"
    then:
      field: description
      function: truthy

  security-api-key-header-name:
    description: Adyen API key header should be named X-API-Key.
    severity: warn
    given: "$.components.securitySchemes[?(@.type=='apiKey')]"
    then:
      field: name
      function: enumeration
      functionOptions:
        values:
          - X-API-Key

  # 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

  delete-no-request-body:
    description: DELETE operations should not have a request body.
    severity: warn
    given: "$.paths[*].delete"
    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: ".+"

  microcks-operation-present:
    description: Each operation should have x-microcks-operation for mock server support.
    severity: info
    given: "$.paths[*][get,post,put,patch,delete]"
    then:
      field: x-microcks-operation
      function: truthy