# BizAPI Spectral Ruleset
# Enforces conventions observed in the BizAPI Business Intelligence API OpenAPI specification.

rules:

  # INFO / METADATA
  info-title-prefix:
    description: API title must start with "BizAPI"
    message: 'Info title must start with "BizAPI" — got "{{value}}"'
    severity: warn
    given: '$.info.title'
    then:
      function: pattern
      functionOptions:
        match: '^BizAPI'

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

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

  info-contact-required:
    description: Info object should have contact information
    severity: warn
    given: '$.info'
    then:
      field: contact
      function: truthy

  # OPENAPI VERSION
  openapi-version:
    description: Must use OpenAPI 3.x
    severity: error
    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:
    description: Server URLs must use HTTPS
    severity: error
    given: '$.servers[*].url'
    then:
      function: pattern
      functionOptions:
        match: '^https://'

  # PATHS — NAMING CONVENTIONS
  paths-kebab-case:
    description: Path segments must use kebab-case or lowercase
    severity: warn
    given: '$.paths[*]~'
    then:
      function: pattern
      functionOptions:
        match: '^(/[a-z0-9-]+)+$'

  paths-no-trailing-slash:
    description: Paths must not have trailing slashes
    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,options,head]'
    then:
      field: summary
      function: truthy

  operation-summary-prefix:
    description: Operation summaries must start with "BizAPI"
    message: 'Operation summary must start with "BizAPI" — got "{{value}}"'
    severity: warn
    given: '$.paths[*][get,post,put,patch,delete].summary'
    then:
      function: pattern
      functionOptions:
        match: '^BizAPI'

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

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

  operation-id-camel-case:
    description: operationId 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: warn
    given: '$.paths[*][get,post,put,patch,delete,options,head]'
    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].parameters[*]'
    then:
      field: description
      function: truthy

  parameter-schema-required:
    description: Every parameter must define a schema
    severity: error
    given: '$.paths[*][get,post,put,patch,delete].parameters[*]'
    then:
      field: schema
      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:
    description: Request bodies must support application/json content type
    severity: warn
    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 2xx response
    severity: error
    given: '$.paths[*][get,post,put,patch,delete]'
    then:
      field: responses
      function: schema
      functionOptions:
        schema:
          type: object
          patternProperties:
            '^2[0-9]{2}$': {}
          minProperties: 1

  response-401-defined:
    description: Operations using authentication should define a 401 response
    severity: warn
    given: '$.paths[*][post]'
    then:
      field: responses
      function: schema
      functionOptions:
        schema:
          type: object
          required: ['401']

  response-429-defined:
    description: Operations should define a 429 rate-limit response
    severity: info
    given: '$.paths[*][post]'
    then:
      field: responses
      function: schema
      functionOptions:
        schema:
          type: object
          required: ['429']

  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 — PROPERTY NAMING
  schema-property-snake-case:
    description: Schema property names must use snake_case
    severity: warn
    given: '$.components.schemas[*].properties[*]~'
    then:
      function: pattern
      functionOptions:
        match: '^[a-z][a-z0-9_]*$'

  schema-description-required:
    description: Top-level schemas must have a description
    severity: warn
    given: '$.components.schemas[*]'
    then:
      field: description
      function: truthy

  schema-properties-description:
    description: Schema properties should have descriptions
    severity: info
    given: '$.components.schemas[*].properties[*]'
    then:
      field: description
      function: truthy

  # SECURITY
  security-schemes-defined:
    description: At least one security scheme must be defined in components
    severity: error
    given: '$.components'
    then:
      field: securitySchemes
      function: truthy

  security-global-defined:
    description: Global security must be defined
    severity: warn
    given: '$'
    then:
      field: security
      function: truthy

  # HTTP METHOD CONVENTIONS
  post-has-request-body:
    description: POST operations should have a request body
    severity: warn
    given: '$.paths[*].post'
    then:
      field: requestBody
      function: truthy

  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 strings
    severity: error
    given: '$..description'
    then:
      function: pattern
      functionOptions:
        match: '.+'

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

  tags-global-defined:
    description: Global tags array should be defined
    severity: info
    given: '$'
    then:
      field: tags
      function: truthy