# Tronald Dump Spectral Ruleset
#
# Opinionated Spectral rules derived from analysis of the Tronald Dump
# Quotes API. The Tronald Dump API was a small, public, no-auth REST API
# returning HAL (Hypertext Application Language) JSON for a corpus of
# Donald Trump quotes. Conventions enforced here reflect the observed
# patterns: kebab-case paths, snake_case schema properties, camelCase
# operationIds with verb prefixes (get/search), Title Case tags grouping
# by entity (Quotes, Tags, Authors, Sources), and HAL response envelopes
# with `_links` and `_embedded` sections.
#
# Apply with: spectral lint openapi/*.yml -r rules/tronald-dump-spectral-rules.yml

extends:
- "spectral:oas"

rules:

  # ─────────────────────────────────────────────────────────────────────
  # INFO / METADATA
  # ─────────────────────────────────────────────────────────────────────

  info-title-prefix:
    description: "Spec title MUST begin with 'Tronald Dump'."
    severity: error
    given: "$.info.title"
    then:
      function: pattern
      functionOptions:
        match: "^Tronald Dump"

  info-description-required:
    description: "API description MUST be present and at least 60 characters."
    severity: error
    given: "$.info.description"
    then:
      function: length
      functionOptions:
        min: 60

  info-contact-required:
    description: "Contact block MUST be present with at least a name."
    severity: warn
    given: "$.info.contact"
    then:
      field: name
      function: truthy

  info-license-required:
    description: "License block MUST be defined."
    severity: warn
    given: "$.info.license"
    then:
      function: truthy

  info-version-required:
    description: "Spec version MUST be present."
    severity: error
    given: "$.info.version"
    then:
      function: truthy

  # ─────────────────────────────────────────────────────────────────────
  # OPENAPI VERSION
  # ─────────────────────────────────────────────────────────────────────

  openapi-version-3:
    description: "Use OpenAPI 3.0.x or 3.1.x."
    severity: error
    given: "$.openapi"
    then:
      function: pattern
      functionOptions:
        match: "^3\\."

  # ─────────────────────────────────────────────────────────────────────
  # SERVERS
  # ─────────────────────────────────────────────────────────────────────

  servers-required:
    description: "At least one server URL MUST be defined."
    severity: error
    given: "$.servers"
    then:
      function: length
      functionOptions:
        min: 1

  servers-https:
    description: "Server URLs MUST use https."
    severity: warn
    given: "$.servers[*].url"
    then:
      function: pattern
      functionOptions:
        match: "^https://"

  servers-description-required:
    description: "Each server entry MUST include a description."
    severity: warn
    given: "$.servers[*]"
    then:
      field: description
      function: truthy

  # ─────────────────────────────────────────────────────────────────────
  # PATHS — NAMING CONVENTIONS
  # ─────────────────────────────────────────────────────────────────────

  paths-kebab-case-or-template:
    description: "Path segments MUST be lowercase kebab-case or {snake_case} templates."
    severity: warn
    given: "$.paths.*~"
    then:
      function: pattern
      functionOptions:
        match: "^(/[a-z0-9-]+|/\\{[a-z0-9_]+\\})+$"

  paths-no-trailing-slash:
    description: "Paths MUST NOT end with a trailing slash."
    severity: error
    given: "$.paths.*~"
    then:
      function: pattern
      functionOptions:
        notMatch: ".+/$"

  paths-no-query-string:
    description: "Paths MUST NOT contain a query string."
    severity: error
    given: "$.paths.*~"
    then:
      function: pattern
      functionOptions:
        notMatch: "\\?"

  paths-no-file-extensions:
    description: "Paths SHOULD NOT carry file extensions (.json, .xml)."
    severity: warn
    given: "$.paths.*~"
    then:
      function: pattern
      functionOptions:
        notMatch: "\\.(json|xml|html)$"

  # ─────────────────────────────────────────────────────────────────────
  # OPERATIONS
  # ─────────────────────────────────────────────────────────────────────

  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."
    severity: error
    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 SHOULD start with a verb (get, list, search, create, update, delete)."
    severity: warn
    given: "$.paths.*[get,post,put,patch,delete].operationId"
    then:
      function: pattern
      functionOptions:
        match: "^(get|list|search|create|update|delete|find|lookup)"

  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-summary-prefix:
    description: "Operation summaries SHOULD begin with 'Tronald Dump'."
    severity: warn
    given: "$.paths.*[get,post,put,patch,delete].summary"
    then:
      function: pattern
      functionOptions:
        match: "^Tronald Dump"

  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-tags-required:
    description: "Every operation MUST have at least one tag."
    severity: error
    given: "$.paths.*[get,post,put,patch,delete]"
    then:
      field: tags
      function: schema
      functionOptions:
        schema:
          type: array
          minItems: 1

  operation-microcks-extension:
    description: "Every operation SHOULD include x-microcks-operation for mock compatibility."
    severity: info
    given: "$.paths.*[get,post,put,patch,delete]"
    then:
      field: x-microcks-operation
      function: truthy

  # ─────────────────────────────────────────────────────────────────────
  # TAGS
  # ─────────────────────────────────────────────────────────────────────

  tags-global-defined:
    description: "Top-level tags array MUST be defined."
    severity: warn
    given: "$.tags"
    then:
      function: length
      functionOptions:
        min: 1

  tag-description-required:
    description: "Every global tag MUST have a description."
    severity: warn
    given: "$.tags[*]"
    then:
      field: description
      function: truthy

  tag-title-case:
    description: "Tag names MUST be Title Case (single capitalized word or capitalized words separated by spaces)."
    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: error
    given: "$.paths.*.*.parameters[*]"
    then:
      field: description
      function: truthy

  parameter-snake-case:
    description: "Parameter names MUST be snake_case."
    severity: warn
    given: "$.paths.*.*.parameters[*].name"
    then:
      function: pattern
      functionOptions:
        match: "^[a-z][a-z0-9_]*$"

  parameter-schema-required:
    description: "Every parameter MUST have a schema with a type."
    severity: error
    given: "$.paths.*.*.parameters[*]"
    then:
      field: schema
      function: truthy

  parameter-pagination-standard:
    description: "Pagination parameters MUST be named 'page' and 'size' (Tronald Dump convention)."
    severity: warn
    given: "$.paths.*.*.parameters[?(@.in=='query' && (@.name=='offset' || @.name=='limit' || @.name=='per_page' || @.name=='pageSize'))]"
    then:
      function: falsy

  parameter-example-encouraged:
    description: "Parameters SHOULD include an example value."
    severity: info
    given: "$.paths.*.*.parameters[*]"
    then:
      field: example
      function: truthy

  # ─────────────────────────────────────────────────────────────────────
  # RESPONSES
  # ─────────────────────────────────────────────────────────────────────

  response-200-required:
    description: "Every GET operation MUST define a 200 response."
    severity: error
    given: "$.paths.*.get.responses"
    then:
      field: "200"
      function: truthy

  response-404-on-id-paths:
    description: "Path operations with an ID parameter SHOULD define a 404 response."
    severity: warn
    given: "$.paths[?(@property.match(/\\{.+\\}/))].*.responses"
    then:
      field: "404"
      function: truthy

  response-500-encouraged:
    description: "Operations SHOULD document a 500 response."
    severity: info
    given: "$.paths.*[get,post,put,patch,delete].responses"
    then:
      field: "500"
      function: truthy

  response-description-required:
    description: "Every response MUST have a description."
    severity: error
    given: "$.paths.*.*.responses.*"
    then:
      field: description
      function: truthy

  response-hal-content-type:
    description: "Successful responses SHOULD use application/hal+json (HAL convention)."
    severity: info
    given: "$.paths.*.*.responses[?(@property.match(/^2\\d{2}$/))].content"
    then:
      field: "application/hal+json"
      function: truthy

  response-example-encouraged:
    description: "Responses SHOULD include at least one named example."
    severity: info
    given: "$.paths.*.*.responses.*.content.*"
    then:
      function: schema
      functionOptions:
        schema:
          anyOf:
          - required: ["example"]
          - required: ["examples"]

  # ─────────────────────────────────────────────────────────────────────
  # SCHEMAS — PROPERTY NAMING
  # ─────────────────────────────────────────────────────────────────────

  schema-snake-case-properties:
    description: "Schema property names MUST be snake_case (except HAL conventions _links, _embedded)."
    severity: warn
    given: "$.components.schemas.*.properties.*~"
    then:
      function: pattern
      functionOptions:
        match: "^(_links|_embedded|[a-z][a-z0-9_]*)$"

  schema-description-required:
    description: "Top-level component schemas MUST have a description."
    severity: warn
    given: "$.components.schemas.*"
    then:
      field: description
      function: truthy

  schema-type-required:
    description: "Schemas MUST declare a type."
    severity: error
    given: "$.components.schemas.*"
    then:
      field: type
      function: truthy

  schema-id-suffix:
    description: "Unique identifier properties SHOULD be named with an _id suffix."
    severity: info
    given: "$.components.schemas.*.properties[?(@property == 'id' || @property == 'identifier')]~"
    then:
      function: falsy

  schema-hal-links-on-resources:
    description: "Resource schemas SHOULD include a _links property for HAL hypermedia."
    severity: info
    given: "$.components.schemas[?(@property.match(/^(Quote|Author|Source|Tag)$/))].properties"
    then:
      field: _links
      function: truthy

  # ─────────────────────────────────────────────────────────────────────
  # SECURITY
  # ─────────────────────────────────────────────────────────────────────

  security-not-required-public-api:
    description: "Tronald Dump is a public, no-auth API. The global `security` field SHOULD be omitted."
    severity: info
    given: "$.security"
    then:
      function: falsy

  # ─────────────────────────────────────────────────────────────────────
  # HTTP METHOD CONVENTIONS
  # ─────────────────────────────────────────────────────────────────────

  get-no-request-body:
    description: "GET operations MUST NOT define a request body."
    severity: error
    given: "$.paths.*.get"
    then:
      field: requestBody
      function: falsy

  delete-no-request-body:
    description: "DELETE operations MUST NOT define a request body."
    severity: error
    given: "$.paths.*.delete"
    then:
      field: requestBody
      function: falsy

  # ─────────────────────────────────────────────────────────────────────
  # GENERAL QUALITY
  # ─────────────────────────────────────────────────────────────────────

  no-empty-description:
    description: "Descriptions MUST NOT be empty strings."
    severity: error
    given: "$..description"
    then:
      function: truthy

  external-docs-encouraged:
    description: "Spec SHOULD include externalDocs pointing at provider documentation."
    severity: info
    given: "$.externalDocs"
    then:
      function: truthy