# Spectral ruleset for Disney API (disneyapi.dev)
#
# Encodes the conventions found in the Disney API OpenAPI specification:
# - OpenAPI 3.0.3
# - Two-tag taxonomy ("Characters", "Index")
# - Lowercase paths with kebab/segment style and numeric {id} path parameters
# - camelCase operationIds, Title Case summaries prefixed with "Disney API"
# - All operations are GET; no request bodies, no authentication
# - JSON responses with an {info, data} envelope
# - Hosted on Heroku at https://api.disneyapi.dev

extends:
  - spectral:oas

rules:

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

  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 BSD-3-Clause).
    message: "info.license is required and should be BSD-3-Clause"
    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 Disney API canonical host is api.disneyapi.dev.
    message: "server URL should be https://api.disneyapi.dev"
    severity: warn
    given: $.servers[*].url
    then:
      function: pattern
      functionOptions:
        match: "^https://api\\.disneyapi\\.dev"

  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 (path parameters in {braces} allowed).
    message: "path '{{value}}' must be lowercase"
    severity: error
    given: $.paths[*]~
    then:
      function: pattern
      functionOptions:
        match: "^/[a-z0-9/{}]*$"

  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-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 Disney API operations are GET.
    message: "Disney API 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 "Disney API".
    message: "operation summary should start with 'Disney API'"
    severity: warn
    given: $.paths[*][get,post,put,patch,delete].summary
    then:
      function: pattern
      functionOptions:
        match: "^Disney API "

  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. "Characters").
    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
  parameter-description-required:
    description: All parameters must have a description.
    message: "parameter '{{value}}' is missing a description"
    severity: warn
    given: $.components.parameters[*]
    then:
      field: description
      function: truthy

  parameter-name-camelcase:
    description: Query/header/path parameter names must be camelCase.
    message: "parameter name '{{value}}' must be camelCase"
    severity: warn
    given: $.components.parameters[*].name
    then:
      function: pattern
      functionOptions:
        match: "^[a-z][a-zA-Z0-9]*$"

  path-parameter-id-integer:
    description: Path parameters named `id` must be typed as integer.
    message: "path parameter `id` must be type integer"
    severity: warn
    given: "$.components.parameters.CharacterId.schema"
    then:
      field: type
      function: pattern
      functionOptions:
        match: "^integer$"

  pagination-page-and-pagesize:
    description: Page-based pagination uses `page` and `pageSize`.
    message: "pagination parameters should be named `page` and `pageSize`"
    severity: info
    given: $.components.parameters[Page,PageSize].name
    then:
      function: pattern
      functionOptions:
        match: "^(page|pageSize)$"

  # REQUEST BODIES
  requestbody-not-used:
    description: Disney API exposes no request bodies; all operations are pure reads.
    message: "Disney API 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 must use application/json.
    message: "2xx responses should use application/json"
    severity: info
    given: $.paths[*][get,post,put,patch,delete].responses[200].content
    then:
      field: application/json
      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, with `_id` allowed as a Mongo-native exception.
    message: "schema property '{{property}}' must be camelCase (or `_id`)"
    severity: warn
    given: $.components.schemas[*].properties[*]~
    then:
      function: pattern
      functionOptions:
        match: "^(_id|[a-z][a-zA-Z0-9]*)$"

  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-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

  # ENVELOPE
  response-envelope-info-data:
    description: List/show responses use an envelope of {info, data}.
    message: "CharacterPage and CharacterSingle must expose `info` and `data`"
    severity: info
    given: "$.components.schemas[CharacterPage,CharacterSingle].properties"
    then:
      function: schema
      functionOptions:
        schema:
          required:
            - info
            - data

  # SECURITY
  security-none:
    description: Disney API is an open, unauthenticated public API; reject security schemes.
    message: "Disney API 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