# Words API — Spectral Ruleset
# Enforces the documented Words API conventions: camelCase paths and parameters,
# Title-Case summaries prefixed with "Words API", RapidAPI key auth, JSON
# responses, and the {word} path-parameter contract.
extends: [[spectral:oas, recommended]]

rules:
  # ─────────────────────────────────────────────────────────────────────────────
  # INFO / METADATA
  # ─────────────────────────────────────────────────────────────────────────────
  info-title-prefix:
    description: Spec info.title must begin with "Words API".
    message: "info.title should start with 'Words API'"
    severity: error
    given: $.info.title
    then:
      function: pattern
      functionOptions:
        match: "^Words API"
  info-description-required:
    description: Spec must include an info.description of at least 50 characters.
    severity: warn
    given: $.info
    then:
      field: description
      function: length
      functionOptions:
        min: 50
  info-contact-required:
    description: Spec must include contact information.
    severity: warn
    given: $.info
    then:
      field: contact
      function: truthy

  # ─────────────────────────────────────────────────────────────────────────────
  # OPENAPI VERSION
  # ─────────────────────────────────────────────────────────────────────────────
  openapi-version-3:
    description: Spec must use OpenAPI 3.x.
    severity: error
    given: $.openapi
    then:
      function: pattern
      functionOptions:
        match: "^3\\."

  # ─────────────────────────────────────────────────────────────────────────────
  # SERVERS
  # ─────────────────────────────────────────────────────────────────────────────
  servers-rapidapi-host:
    description: Words API servers must point at wordsapiv1.p.rapidapi.com.
    severity: error
    given: $.servers[*].url
    then:
      function: pattern
      functionOptions:
        match: "^https://wordsapiv1\\.p\\.rapidapi\\.com"
  servers-https-only:
    description: Server URLs must use HTTPS.
    severity: error
    given: $.servers[*].url
    then:
      function: pattern
      functionOptions:
        match: "^https://"

  # ─────────────────────────────────────────────────────────────────────────────
  # PATHS — NAMING CONVENTIONS
  # ─────────────────────────────────────────────────────────────────────────────
  paths-words-prefix:
    description: Every operation path must live under /words.
    severity: error
    given: $.paths
    then:
      field: "@key"
      function: pattern
      functionOptions:
        match: "^/words"
  paths-camel-case-segments:
    description: Path segments use camelCase (e.g. /words/{word}/hasTypes, /words/{word}/inCategory).
    severity: warn
    given: $.paths
    then:
      field: "@key"
      function: pattern
      functionOptions:
        match: "^/words(/\\{?[a-z][a-zA-Z0-9]*\\}?)*/?$"
  paths-word-param:
    description: Per-word resources must use the {word} path parameter.
    severity: warn
    given: $.paths
    then:
      field: "@key"
      function: pattern
      functionOptions:
        notMatch: "^/words/[a-z]+/[a-zA-Z]"
  paths-no-trailing-version:
    description: Do not version inside the path — versioning is handled by the host (wordsapiv1).
    severity: warn
    given: $.paths
    then:
      field: "@key"
      function: pattern
      functionOptions:
        notMatch: "/v[0-9]+/"

  # ─────────────────────────────────────────────────────────────────────────────
  # OPERATIONS
  # ─────────────────────────────────────────────────────────────────────────────
  operation-summary-required:
    description: Every operation must have a summary.
    severity: error
    given: "$.paths[*][get,post,put,patch,delete]"
    then:
      field: summary
      function: truthy
  operation-description-required:
    description: Every operation must have a description.
    severity: error
    given: "$.paths[*][get,post,put,patch,delete]"
    then:
      field: description
      function: truthy
  operation-summary-words-prefix:
    description: Operation summaries should start with "Get" or "Search" and be readable.
    severity: warn
    given: "$.paths[*][get,post,put,patch,delete].summary"
    then:
      function: pattern
      functionOptions:
        match: "^(Get|Search) "
  operation-operationid-required:
    description: Every operation must have an operationId.
    severity: error
    given: "$.paths[*][get,post,put,patch,delete]"
    then:
      field: operationId
      function: truthy
  operation-operationid-camel-case:
    description: operationId must be camelCase starting with a verb (get, search, list, create, update, delete).
    severity: warn
    given: "$.paths[*][get,post,put,patch,delete].operationId"
    then:
      function: pattern
      functionOptions:
        match: "^(get|search|list|create|update|delete)[A-Z][a-zA-Z0-9]*$"
  operation-tags-required:
    description: Every operation must have at least one tag.
    severity: error
    given: "$.paths[*][get,post,put,patch,delete]"
    then:
      field: tags
      function: truthy
  operation-microcks-extension:
    description: Every operation must carry an x-microcks-operation block for mock-server compatibility.
    severity: warn
    given: "$.paths[*][get,post,put,patch,delete]"
    then:
      field: x-microcks-operation
      function: truthy

  # ─────────────────────────────────────────────────────────────────────────────
  # TAGS
  # ─────────────────────────────────────────────────────────────────────────────
  tags-global-array:
    description: Tags must be declared at the document level with descriptions.
    severity: warn
    given: $.tags
    then:
      function: truthy
  tags-title-case:
    description: Tag names must be Title Case.
    severity: warn
    given: $.tags[*].name
    then:
      function: pattern
      functionOptions:
        match: "^[A-Z][a-zA-Z0-9]*( [A-Z][a-zA-Z0-9]*)*$"

  # ─────────────────────────────────────────────────────────────────────────────
  # PARAMETERS
  # ─────────────────────────────────────────────────────────────────────────────
  parameter-description-required:
    description: Every parameter must have a description.
    severity: warn
    given: "$.paths[*][get,post,put,patch,delete].parameters[*]"
    then:
      field: description
      function: truthy
  parameter-schema-required:
    description: Every parameter must declare a schema.
    severity: error
    given: "$.paths[*][get,post,put,patch,delete].parameters[*]"
    then:
      field: schema
      function: truthy
  parameter-camel-case:
    description: Query parameter names use camelCase (lettersMin, soundsMax, partOfSpeech, hasDetails).
    severity: warn
    given: "$.paths[*][get,post,put,patch,delete].parameters[?(@.in == 'query')].name"
    then:
      function: pattern
      functionOptions:
        match: "^[a-z][a-zA-Z0-9]*$"

  # ─────────────────────────────────────────────────────────────────────────────
  # RESPONSES
  # ─────────────────────────────────────────────────────────────────────────────
  response-success-required:
    description: Every operation must define a 200 response.
    severity: error
    given: "$.paths[*][get,post,put,patch,delete].responses"
    then:
      field: "200"
      function: truthy
  response-404-on-word-lookup:
    description: Per-word lookups should document a 404 response.
    severity: warn
    given: "$.paths[/words/{word},/words/{word}/definitions,/words/{word}/synonyms,/words/{word}/antonyms,/words/{word}/examples].get.responses"
    then:
      field: "404"
      function: truthy
  response-json-content-type:
    description: Response bodies must be application/json.
    severity: warn
    given: "$.paths[*][get,post,put,patch,delete].responses[*].content"
    then:
      field: "application/json"
      function: truthy
  response-description-required:
    description: Every response must include a description.
    severity: warn
    given: "$.paths[*][get,post,put,patch,delete].responses[*]"
    then:
      field: description
      function: truthy

  # ─────────────────────────────────────────────────────────────────────────────
  # SCHEMAS — PROPERTY NAMING
  # ─────────────────────────────────────────────────────────────────────────────
  schema-property-camel-case:
    description: Schema property names use camelCase (matches Words API JSON — hasTypes, typeOf, perMillion, numSyllables).
    severity: warn
    given: "$.components.schemas[*].properties.*~"
    then:
      function: pattern
      functionOptions:
        match: "^[a-z][a-zA-Z0-9]*$"
  schema-description-required:
    description: Top-level schemas should have a description.
    severity: warn
    given: "$.components.schemas[*]"
    then:
      field: description
      function: truthy

  # ─────────────────────────────────────────────────────────────────────────────
  # SECURITY
  # ─────────────────────────────────────────────────────────────────────────────
  security-rapidapi-key:
    description: Words API authentication uses the X-RapidAPI-Key header.
    severity: error
    given: "$.components.securitySchemes[*]"
    then:
      - field: type
        function: pattern
        functionOptions:
          match: "^apiKey$"
      - field: "in"
        function: pattern
        functionOptions:
          match: "^header$"
  security-global-defined:
    description: Global security must be defined at the document level.
    severity: warn
    given: $
    then:
      field: security
      function: truthy

  # ─────────────────────────────────────────────────────────────────────────────
  # HTTP METHOD CONVENTIONS
  # ─────────────────────────────────────────────────────────────────────────────
  http-get-only:
    description: Words API is read-only — only GET methods are allowed.
    severity: error
    given: "$.paths[*]"
    then:
      field: "@key"
      function: pattern
      functionOptions:
        match: "^(get|parameters|summary|description)$"
        notMatch: "^(post|put|patch|delete)$"

  # ─────────────────────────────────────────────────────────────────────────────
  # GENERAL QUALITY
  # ─────────────────────────────────────────────────────────────────────────────
  examples-encouraged:
    description: Parameters should include example values.
    severity: info
    given: "$.paths[*][get,post,put,patch,delete].parameters[*]"
    then:
      field: example
      function: truthy