# Spectral ruleset for PAR Punchh OpenAPI specifications.
# Derived from the conventions observed across the Mobile, Online Ordering & SSO,
# POS/Kiosk, and Platform Functions APIs at developers.partech.com.
# Patterns: snake_case schema properties and parameters; camelCase operationIds with
# verb prefixes; Title Case tags; HMAC x-pch-digest signing plus bearer/token auth.
extends:
  - spectral:oas
rules:

  # ── INFO / METADATA ──────────────────────────────────────────────
  info-title-prefix:
    description: API title should be prefixed with "PAR Punchh".
    severity: warn
    given: $.info.title
    then:
      function: pattern
      functionOptions:
        match: '^PAR Punchh'
  info-description-required:
    description: Info object must have a meaningful description.
    severity: warn
    given: $.info
    then:
      field: description
      function: truthy
  info-version-required:
    description: Info object must declare a version.
    severity: error
    given: $.info
    then:
      field: version
      function: truthy
  info-contact-required:
    description: Info object should include contact details.
    severity: info
    given: $.info
    then:
      field: contact
      function: truthy

  # ── OPENAPI VERSION ──────────────────────────────────────────────
  openapi-version-3:
    description: Specs must target OpenAPI 3.0.x.
    severity: warn
    given: $.openapi
    then:
      function: pattern
      functionOptions:
        match: '^3\.0\.'

  # ── SERVERS ──────────────────────────────────────────────────────
  servers-defined:
    description: Servers must be defined.
    severity: error
    given: $
    then:
      field: servers
      function: truthy
  server-https:
    description: Server URLs must use HTTPS.
    severity: warn
    given: $.servers[*].url
    then:
      function: pattern
      functionOptions:
        match: '^https://'
  server-description:
    description: Each server should have a description.
    severity: info
    given: $.servers[*]
    then:
      field: description
      function: truthy

  # ── PATHS ────────────────────────────────────────────────────────
  path-no-trailing-slash:
    description: Paths must not end with a trailing slash.
    severity: warn
    given: $.paths[*]~
    then:
      function: pattern
      functionOptions:
        notMatch: '.+/$'
  path-snake-case-segments:
    description: Static path segments use snake_case (matching Punchh path style).
    severity: info
    given: $.paths[*]~
    then:
      function: pattern
      functionOptions:
        match: '^(/[a-z0-9_{}]+)+$'

  # ── OPERATIONS ───────────────────────────────────────────────────
  operation-operationId-required:
    description: Every operation must have an operationId.
    severity: error
    given: $.paths[*][get,post,put,delete,patch]
    then:
      field: operationId
      function: truthy
  operation-operationId-camel-case:
    description: operationId should be camelCase.
    severity: warn
    given: $.paths[*][get,post,put,delete,patch].operationId
    then:
      function: pattern
      functionOptions:
        match: '^[a-z][a-zA-Z0-9]*$'
  operation-summary-required:
    description: Every operation must have a summary.
    severity: warn
    given: $.paths[*][get,post,put,delete,patch]
    then:
      field: summary
      function: truthy
  operation-summary-title-case:
    description: Operation summaries should be Title Case.
    severity: info
    given: $.paths[*][get,post,put,delete,patch].summary
    then:
      function: pattern
      functionOptions:
        match: '^[A-Z]'
  operation-description-required:
    description: Every operation must have a description.
    severity: warn
    given: $.paths[*][get,post,put,delete,patch]
    then:
      field: description
      function: truthy
  operation-tags-required:
    description: Every operation must be tagged.
    severity: warn
    given: $.paths[*][get,post,put,delete,patch]
    then:
      field: tags
      function: truthy
  operation-microcks-extension:
    description: Each operation should carry an x-microcks-operation extension for mocking.
    severity: info
    given: $.paths[*][get,post,put,delete,patch]
    then:
      field: x-microcks-operation
      function: truthy

  # ── TAGS ─────────────────────────────────────────────────────────
  tags-global-defined:
    description: A global tags array should be defined.
    severity: info
    given: $
    then:
      field: tags
      function: truthy
  tag-description:
    description: Each global tag should have a description.
    severity: info
    given: $.tags[*]
    then:
      field: description
      function: truthy
  tag-title-case:
    description: Tag names should be Title Case.
    severity: info
    given: $.tags[*].name
    then:
      function: pattern
      functionOptions:
        match: '^[A-Z]'

  # ── PARAMETERS ───────────────────────────────────────────────────
  parameter-description-required:
    description: Every parameter must have a description.
    severity: warn
    given: $.paths[*][*].parameters[*]
    then:
      field: description
      function: truthy
  parameter-snake-case:
    description: Parameter names should be snake_case.
    severity: warn
    given: $.paths[*][*].parameters[*].name
    then:
      function: pattern
      functionOptions:
        match: '^[a-z][a-z0-9_]*$'
  parameter-schema-type:
    description: Every parameter must declare a schema type.
    severity: warn
    given: $.paths[*][*].parameters[*].schema
    then:
      field: type
      function: truthy

  # ── REQUEST BODIES ───────────────────────────────────────────────
  request-body-json:
    description: Request bodies should offer application/json content.
    severity: info
    given: $.paths[*][post,put,patch].requestBody.content
    then:
      field: application/json
      function: truthy

  # ── RESPONSES ────────────────────────────────────────────────────
  response-success-defined:
    description: Each operation must define a 2xx success response.
    severity: warn
    given: $.paths[*][get,post,put,delete,patch].responses
    then:
      field: '200'
      function: truthy
  response-unauthorized:
    description: Authenticated operations should document a 401 response.
    severity: info
    given: $.paths[*][get,post,put,delete,patch].responses
    then:
      field: '401'
      function: truthy
  response-description-required:
    description: Every response must have a description.
    severity: warn
    given: $.paths[*][*].responses[*]
    then:
      field: description
      function: truthy

  # ── SCHEMAS ──────────────────────────────────────────────────────
  schema-property-snake-case:
    description: Schema property names should be snake_case.
    severity: warn
    given: $.components.schemas[*].properties[*]~
    then:
      function: pattern
      functionOptions:
        match: '^[a-z][a-z0-9_]*$'
  schema-type-defined:
    description: Component schemas should declare a type.
    severity: warn
    given: $.components.schemas[*]
    then:
      field: type
      function: truthy

  # ── SECURITY ─────────────────────────────────────────────────────
  security-schemes-defined:
    description: Security schemes must be defined in components.
    severity: warn
    given: $.components
    then:
      field: securitySchemes
      function: truthy
  security-scheme-description:
    description: Each security scheme should be described.
    severity: info
    given: $.components.securitySchemes[*]
    then:
      field: description
      function: truthy