# Spectral ruleset for Kanye REST
#
# Encodes the conventions found in the Kanye REST OpenAPI specification:
# - OpenAPI 3.0.3
# - Single-tag taxonomy ("Quotes")
# - Lowercase root-level paths with no parameters
# - camelCase operationIds
# - Title Case operation summaries prefixed with "Kanye REST"
# - JSON envelope on root + /quotes, text/plain on /text
# - No authentication, no parameters, no request bodies
# - CORS-permissive edge service hosted on Cloudflare Workers

extends:
  - spectral:oas

rules:

  # ── INFO / METADATA ────────────────────────────────────────────────
  info-title-prefix:
    description: Spec title must begin with "Kanye REST".
    message: "info.title should start with 'Kanye REST'"
    severity: warn
    given: $.info.title
    then:
      function: pattern
      functionOptions:
        match: "^Kanye REST"

  info-description-required:
    description: A long-form description is required on info.
    message: "info.description is required and must be at least 60 characters"
    severity: warn
    given: $.info
    then:
      field: description
      function: length
      functionOptions:
        min: 60

  info-license-required:
    description: License metadata is required (project is MIT).
    message: "info.license is required and should be MIT"
    severity: warn
    given: $.info
    then:
      field: license
      function: truthy

  info-contact-required:
    description: Contact info is required so consumers know who to reach.
    message: "info.contact is required"
    severity: info
    given: $.info
    then:
      field: contact
      function: truthy

  # ── OPENAPI VERSION ───────────────────────────────────────────────
  openapi-version-3-0-3:
    description: Pin OpenAPI to the 3.0.x line used by this provider.
    message: "openapi version should be 3.0.x"
    severity: warn
    given: $.openapi
    then:
      function: pattern
      functionOptions:
        match: "^3\\.0\\."

  # ── SERVERS ───────────────────────────────────────────────────────
  servers-defined:
    description: At least one server must be defined.
    message: "servers array must contain at least one entry"
    severity: error
    given: $.servers
    then:
      function: length
      functionOptions:
        min: 1

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

  servers-canonical-host:
    description: The Kanye REST canonical host is api.kanye.rest.
    message: "server URL should be https://api.kanye.rest"
    severity: warn
    given: $.servers[*].url
    then:
      function: pattern
      functionOptions:
        match: "^https://api\\.kanye\\.rest"

  servers-description-required:
    description: Servers should describe what environment they represent.
    message: "server entries should have a description"
    severity: info
    given: $.servers[*]
    then:
      field: description
      function: truthy

  # ── PATHS — NAMING CONVENTIONS ────────────────────────────────────
  paths-lowercase:
    description: Path segments must be lowercase.
    message: "path '{{value}}' must be lowercase"
    severity: error
    given: $.paths[*]~
    then:
      function: pattern
      functionOptions:
        match: "^/[a-z]*$"

  paths-no-trailing-slash:
    description: Paths must not end with a trailing slash (except root).
    message: "path '{{value}}' must not end with a trailing slash"
    severity: error
    given: $.paths[*]~
    then:
      function: pattern
      functionOptions:
        notMatch: ".+/$"

  paths-no-path-parameters:
    description: Kanye REST exposes no path parameters; resources are flat.
    message: "Kanye REST paths must not contain {parameters}"
    severity: error
    given: $.paths[*]~
    then:
      function: pattern
      functionOptions:
        notMatch: "\\{.+\\}"

  paths-no-query-string:
    description: Paths must not contain a query string.
    message: "path '{{value}}' must not contain a query string"
    severity: error
    given: $.paths[*]~
    then:
      function: pattern
      functionOptions:
        notMatch: "\\?"

  # ── OPERATIONS ────────────────────────────────────────────────────
  operation-get-only:
    description: All Kanye REST operations are GET.
    message: "Kanye REST exposes only GET operations; remove '{{property}}'"
    severity: warn
    given: $.paths[*]
    then:
      field: "@key"
      function: pattern
      functionOptions:
        match: "^(get|parameters|summary|description)$"

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

  operation-summary-prefix:
    description: Operation summaries must start with "Kanye REST".
    message: "operation summary should start with 'Kanye REST'"
    severity: warn
    given: $.paths[*][get,post,put,patch,delete].summary
    then:
      function: pattern
      functionOptions:
        match: "^Kanye REST "

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

  operation-operationid-required:
    description: Every operation must have a camelCase operationId.
    message: "operation must define an operationId"
    severity: error
    given: $.paths[*][get,post,put,patch,delete]
    then:
      field: operationId
      function: truthy

  operation-operationid-camelcase:
    description: operationId must be camelCase.
    message: "operationId '{{value}}' must be camelCase"
    severity: warn
    given: $.paths[*][get,post,put,patch,delete].operationId
    then:
      function: pattern
      functionOptions:
        match: "^[a-z][a-zA-Z0-9]+$"

  operation-operationid-verb-prefix:
    description: operationId must start with a known verb prefix.
    message: "operationId '{{value}}' should start with get/list/create/update/delete/search"
    severity: info
    given: $.paths[*][get,post,put,patch,delete].operationId
    then:
      function: pattern
      functionOptions:
        match: "^(get|list|create|update|delete|search|count|find)"

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

  operation-microcks-operation-required:
    description: Every operation must declare an x-microcks-operation block for mockability.
    message: "operation should declare x-microcks-operation"
    severity: info
    given: $.paths[*][get,post,put,patch,delete]
    then:
      field: x-microcks-operation
      function: truthy

  # ── TAGS ──────────────────────────────────────────────────────────
  tags-defined-globally:
    description: A global tags array must be defined with descriptions.
    message: "global tags array must be defined"
    severity: warn
    given: $
    then:
      field: tags
      function: truthy

  tags-title-case:
    description: Tags must use Title Case (e.g. "Quotes").
    message: "tag '{{value}}' must be Title Case"
    severity: warn
    given: $.tags[*].name
    then:
      function: pattern
      functionOptions:
        match: "^[A-Z][a-zA-Z0-9]*( [A-Z][a-zA-Z0-9]*)*$"

  tags-description-required:
    description: Each global tag must have a description.
    message: "tag descriptions are required"
    severity: warn
    given: $.tags[*]
    then:
      field: description
      function: truthy

  # ── PARAMETERS ────────────────────────────────────────────────────
  parameters-not-used:
    description: Kanye REST exposes no parameters; reject any.
    message: "Kanye REST operations must not declare parameters"
    severity: warn
    given: $.paths[*][get,post,put,patch,delete].parameters
    then:
      function: falsy

  # ── REQUEST BODIES ────────────────────────────────────────────────
  requestbody-not-used:
    description: Kanye REST exposes no request bodies; all operations are pure reads.
    message: "Kanye REST operations must not declare request bodies"
    severity: warn
    given: $.paths[*][get,post,put,patch,delete].requestBody
    then:
      function: falsy

  # ── RESPONSES ─────────────────────────────────────────────────────
  response-200-required:
    description: Every operation must define a 200 success response.
    message: "operation must define a 200 response"
    severity: error
    given: $.paths[*][get,post,put,patch,delete].responses
    then:
      field: "200"
      function: truthy

  response-500-required:
    description: Every operation must define a 500 error response.
    message: "operation must define a 500 response"
    severity: warn
    given: $.paths[*][get,post,put,patch,delete].responses
    then:
      field: "500"
      function: truthy

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

  response-json-content:
    description: 2xx responses other than /text must use application/json.
    message: "2xx responses should use application/json"
    severity: info
    given: $.paths[*][get,post,put,patch,delete].responses[200].content
    then:
      function: truthy

  response-example-required:
    description: Every 200 response should ship a named example for mock servers.
    message: "200 responses should include named examples"
    severity: info
    given: $.paths[*][get,post,put,patch,delete].responses[200].content[*]
    then:
      field: examples
      function: truthy

  # ── SCHEMAS — PROPERTY NAMING ─────────────────────────────────────
  schema-property-camelcase:
    description: Schema property names must be camelCase or single-word lowercase.
    message: "schema property '{{property}}' must be camelCase"
    severity: warn
    given: $.components.schemas[*].properties[*]~
    then:
      function: pattern
      functionOptions:
        match: "^[a-z][a-zA-Z0-9]*$"

  schema-property-description:
    description: Schema properties must be described.
    message: "schema property '{{property}}' is missing a description"
    severity: warn
    given: $.components.schemas[*].properties[*]
    then:
      field: description
      function: truthy

  schema-property-type-required:
    description: Schema properties must declare a type or $ref.
    message: "schema property '{{property}}' must declare a type or $ref"
    severity: error
    given: $.components.schemas[*].properties[*]
    then:
      function: schema
      functionOptions:
        schema:
          oneOf:
            - required: ["type"]
            - required: ["$ref"]

  schema-property-example:
    description: Schema properties should declare an example value.
    message: "schema property '{{property}}' should include an example"
    severity: info
    given: $.components.schemas[*].properties[*]
    then:
      field: example
      function: truthy

  schema-top-level-description:
    description: Top-level schemas must have a description.
    message: "schema '{{property}}' is missing a description"
    severity: warn
    given: $.components.schemas[*]
    then:
      field: description
      function: truthy

  # ── SECURITY ──────────────────────────────────────────────────────
  security-none:
    description: Kanye REST is an open, unauthenticated public API; reject security schemes.
    message: "Kanye REST has no authentication; remove security schemes"
    severity: info
    given: $.components.securitySchemes
    then:
      function: falsy

  # ── HTTP METHOD CONVENTIONS ───────────────────────────────────────
  method-get-no-request-body:
    description: GET operations must not declare a request body.
    message: "GET operations must not declare a requestBody"
    severity: error
    given: $.paths[*].get.requestBody
    then:
      function: falsy

  # ── GENERAL QUALITY ───────────────────────────────────────────────
  no-empty-descriptions:
    description: Descriptions must not be empty strings.
    message: "description must not be empty"
    severity: warn
    given: $..description
    then:
      function: truthy