# Amazon Well-Architected Tool API Spectral Ruleset
# Enforces conventions observed across the Well-Architected Tool OpenAPI specification

rules:

  # INFO / METADATA
  info-title-format:
    description: API title should reference AWS Well-Architected Tool
    severity: warn
    given: $.info
    then:
      field: title
      function: pattern
      functionOptions:
        match: "^AWS Well-Architected Tool"

  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: Must use OpenAPI 3.0.x
    severity: error
    given: $
    then:
      field: openapi
      function: pattern
      functionOptions:
        match: "^3\\.0\\."

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

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

  # PATHS — NAMING CONVENTIONS
  paths-kebab-case:
    description: Path segments should use kebab-case or camelCase (AWS uses mixed)
    severity: info
    given: $.paths
    then:
      field: "@key"
      function: pattern
      functionOptions:
        match: "^/[a-zA-Z0-9/_{}.-]+$"

  paths-no-trailing-slash:
    description: Paths must not have a trailing slash
    severity: warn
    given: $.paths
    then:
      field: "@key"
      function: pattern
      functionOptions:
        notMatch: "/$"

  # 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-operationid-pascal-case:
    description: operationId should use PascalCase (AWS convention)
    severity: warn
    given: $.paths[*][get,post,put,patch,delete]
    then:
      field: operationId
      function: pattern
      functionOptions:
        match: "^[A-Z][a-zA-Z0-9]+$"

  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 summary should start with Amazon Well-Architected Tool
    severity: info
    given: $.paths[*][get,post,put,patch,delete]
    then:
      field: summary
      function: pattern
      functionOptions:
        match: "^Amazon Well-Architected Tool"

  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

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

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

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

  # RESPONSES
  response-success-required:
    description: Operations must define at least one success (2xx) response
    severity: error
    given: $.paths[*][get,post,put,patch,delete].responses
    then:
      function: schema
      functionOptions:
        schema:
          minProperties: 1

  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 — PROPERTY NAMING
  schema-description-recommended:
    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 should be defined in components
    severity: warn
    given: $.components
    then:
      field: securitySchemes
      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

  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: ".+"

  components-schemas-exist:
    description: Components schemas should be defined for reuse
    severity: info
    given: $.components
    then:
      field: schemas
      function: truthy