rules:

  # INFO / METADATA
  info-title-required:
    description: Info title must be present and start with "Amazon Lookout for Metrics"
    severity: error
    given: "$.info"
    then:
      field: title
      function: truthy

  info-description-required:
    description: Info description must be present
    severity: warn
    given: "$.info"
    then:
      field: description
      function: truthy

  info-version-required:
    description: API version must be defined
    severity: error
    given: "$.info"
    then:
      field: version
      function: truthy

  # OPENAPI VERSION
  openapi-version:
    description: Must use OpenAPI 3.0.x
    severity: error
    given: "$"
    then:
      field: openapi
      function: pattern
      functionOptions:
        match: "^3\\.0\\."

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

  servers-https:
    description: Server URLs should use HTTPS
    severity: warn
    given: "$.servers[*]"
    then:
      field: url
      function: pattern
      functionOptions:
        match: "^https://"

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

  operation-summary-prefix:
    description: Operation summaries should start with "Amazon Lookout for Metrics"
    severity: info
    given: "$.paths[*][get,post,put,patch,delete].summary"
    then:
      function: pattern
      functionOptions:
        match: "^Amazon Lookout for Metrics"

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

  # PATHS
  paths-kebab-case:
    description: Path segments should use PascalCase (AWS convention for action-based paths)
    severity: info
    given: "$.paths"
    then:
      field: "@key"
      function: pattern
      functionOptions:
        match: "^/[A-Za-z][A-Za-z0-9]*$"

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

  # RESPONSES
  response-success-required:
    description: Operations must have at least one 2xx response
    severity: error
    given: "$.paths[*][post]"
    then:
      field: responses
      function: schema
      functionOptions:
        schema:
          type: object
          minProperties: 1

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

  response-error-401:
    description: Operations should document 401 Unauthorized responses
    severity: info
    given: "$.paths[*][post]"
    then:
      field: responses
      function: schema
      functionOptions:
        schema:
          type: object

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

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

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

  security-aws-sigv4:
    description: AWS Signature Version 4 security should be documented
    severity: warn
    given: "$.components.securitySchemes"
    then:
      function: truthy

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

  http-delete-no-body:
    description: DELETE operations should not have request bodies
    severity: warn
    given: "$.paths[*].delete"
    then:
      field: requestBody
      function: falsy

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

  examples-encouraged:
    description: Schema properties should include examples
    severity: info
    given: "$.components.schemas[*].properties[*]"
    then:
      field: example
      function: truthy