# Spectral ruleset for the Lunchbox 2.0 APIs (Core, Management, Loyalty, POS).
# Enforces the conventions observed across the Lunchbox OpenAPI specifications:
# Title Case "Lunchbox ..." summaries, camelCase operationIds with verb prefixes,
# Title Case tags, snake_case parameters and schema properties, token/Api-Key auth.
extends: [[spectral:oas, off]]

rules:
  # ---------------------------------------------------------------------------
  # INFO / METADATA
  # ---------------------------------------------------------------------------
  info-title-lunchbox:
    description: API title should start with "Lunchbox".
    severity: warn
    given: $.info.title
    then:
      function: pattern
      functionOptions:
        match: '^Lunchbox'
  info-description-required:
    description: Info description is required and should be meaningful.
    severity: warn
    given: $.info
    then:
      field: description
      function: truthy
  info-version-required:
    description: Info version is required.
    severity: error
    given: $.info
    then:
      field: version
      function: truthy
  info-contact-required:
    description: Contact information should be provided.
    severity: info
    given: $.info
    then:
      field: contact
      function: truthy

  # ---------------------------------------------------------------------------
  # OPENAPI VERSION
  # ---------------------------------------------------------------------------
  openapi-version-3:
    description: Specs must use OpenAPI 3.0.x.
    severity: error
    given: $.openapi
    then:
      function: pattern
      functionOptions:
        match: '^3\.0\.\d+$'

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

  # ---------------------------------------------------------------------------
  # PATHS — NAMING CONVENTIONS
  # ---------------------------------------------------------------------------
  paths-no-trailing-slash:
    description: Paths should not end with a trailing slash (except root collections).
    severity: warn
    given: $.paths[*]~
    then:
      function: pattern
      functionOptions:
        notMatch: '.+/$'
  paths-no-query-string:
    description: Path keys must not contain query strings.
    severity: error
    given: $.paths[*]~
    then:
      function: pattern
      functionOptions:
        notMatch: '\?'

  # ---------------------------------------------------------------------------
  # OPERATIONS
  # ---------------------------------------------------------------------------
  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-lunchbox-prefix:
    description: Operation summaries should start with "Lunchbox".
    severity: warn
    given: $.paths[*][get,post,put,patch,delete].summary
    then:
      function: pattern
      functionOptions:
        match: '^Lunchbox '
  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-camelcase:
    description: operationId should be 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]
    then:
      field: tags
      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 (e.g., "User Wallet", "Service Types").
    severity: warn
    given: $.tags[*].name
    then:
      function: pattern
      functionOptions:
        match: '^[A-Z][A-Za-z]*( [A-Z][A-Za-z]*)*$'

  # ---------------------------------------------------------------------------
  # PARAMETERS
  # ---------------------------------------------------------------------------
  parameter-snake-case:
    description: Parameter names should be snake_case (Lunchbox convention).
    severity: warn
    given: $.paths[*][*].parameters[*].name
    then:
      function: pattern
      functionOptions:
        match: '^[a-z][a-z0-9_]*$'
  parameter-schema-required:
    description: Each parameter must define a schema.
    severity: error
    given: $.paths[*][*].parameters[*]
    then:
      field: schema
      function: truthy

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

  # ---------------------------------------------------------------------------
  # RESPONSES
  # ---------------------------------------------------------------------------
  response-success-defined:
    description: Each operation must define at least one 2xx response.
    severity: error
    given: $.paths[*][get,post,put,patch,delete].responses
    then:
      function: schema
      functionOptions:
        schema:
          type: object
          patternProperties:
            '^2\d\d$': {}
          minProperties: 1
  response-description-required:
    description: Each response must have a description.
    severity: warn
    given: $.paths[*][*].responses[*]
    then:
      field: description
      function: truthy

  # ---------------------------------------------------------------------------
  # SCHEMAS — PROPERTY NAMING
  # ---------------------------------------------------------------------------
  schema-property-snake-case:
    description: Schema property names should be snake_case (Core/Management/POS convention).
    severity: info
    given: $.components.schemas[*].properties[*]~
    then:
      function: pattern
      functionOptions:
        match: '^[a-zA-Z][a-zA-Z0-9_]*$'
  schema-property-typed:
    description: Schema properties should declare a type or a $ref.
    severity: info
    given: $.components.schemas[*].properties[*]
    then:
      function: schema
      functionOptions:
        schema:
          anyOf:
            - required: [type]
            - required: ['$ref']
            - required: [allOf]
            - required: [oneOf]
            - required: [anyOf]

  # ---------------------------------------------------------------------------
  # SECURITY
  # ---------------------------------------------------------------------------
  security-global-defined:
    description: A global security requirement should be defined.
    severity: warn
    given: $
    then:
      field: security
      function: truthy
  security-schemes-defined:
    description: Security schemes must be declared under components.
    severity: warn
    given: $.components
    then:
      field: securitySchemes
      function: truthy
  security-scheme-described:
    description: Each security scheme should have a description.
    severity: info
    given: $.components.securitySchemes[*]
    then:
      field: description
      function: truthy

  # ---------------------------------------------------------------------------
  # HTTP METHOD CONVENTIONS
  # ---------------------------------------------------------------------------
  get-no-request-body:
    description: GET operations must not declare a request body.
    severity: error
    given: $.paths[*].get
    then:
      field: requestBody
      function: falsy
  delete-no-request-body:
    description: DELETE operations should not declare a request body.
    severity: warn
    given: $.paths[*].delete
    then:
      field: requestBody
      function: falsy

  # ---------------------------------------------------------------------------
  # GENERAL QUALITY
  # ---------------------------------------------------------------------------
  operation-examples-encouraged:
    description: Operations are encouraged to provide response examples.
    severity: info
    given: $.paths[*][*].responses[*].content.application/json
    then:
      function: schema
      functionOptions:
        schema:
          anyOf:
            - required: [example]
            - required: [examples]
            - required: [schema]