# Spectral ruleset for the Spaceflight News API (SNAPI)
# Enforces the conventions observed in TheSpaceDevs/spaceflightnewsapi v4 specs.
extends:
  - spectral:oas

rules:

  # ─────────────────────────────────────────────────────────────────
  # INFO / METADATA
  # ─────────────────────────────────────────────────────────────────
  info-title-spaceflight-news-prefix:
    description: API info.title should identify Spaceflight News API.
    severity: warn
    given: $.info
    then:
      field: title
      function: pattern
      functionOptions:
        match: "^Spaceflight News API"

  info-description-required:
    description: API must have a substantive description (min 80 chars).
    severity: warn
    given: $.info
    then:
      field: description
      function: length
      functionOptions:
        min: 80

  info-version-required:
    description: API must declare info.version.
    severity: error
    given: $.info
    then:
      field: version
      function: truthy

  info-contact-required:
    description: API should provide an info.contact block.
    severity: warn
    given: $.info
    then:
      field: contact
      function: truthy

  info-license-required:
    description: API should declare a license (SNAPI is AGPL-3.0).
    severity: warn
    given: $.info
    then:
      field: license
      function: truthy

  # ─────────────────────────────────────────────────────────────────
  # OPENAPI VERSION
  # ─────────────────────────────────────────────────────────────────
  openapi-version-3-0:
    description: SNAPI specs should use OpenAPI 3.0.x.
    severity: warn
    given: $
    then:
      field: openapi
      function: pattern
      functionOptions:
        match: "^3\\.0\\."

  # ─────────────────────────────────────────────────────────────────
  # SERVERS
  # ─────────────────────────────────────────────────────────────────
  servers-required:
    description: At least one server URL must be defined.
    severity: error
    given: $
    then:
      field: servers
      function: truthy

  servers-https-only:
    description: Server URLs must use HTTPS.
    severity: error
    given: $.servers[*]
    then:
      field: url
      function: pattern
      functionOptions:
        match: "^https://"

  servers-snapi-v4-host:
    description: Production server should be api.spaceflightnewsapi.net/v4.
    severity: warn
    given: $.servers[*]
    then:
      field: url
      function: pattern
      functionOptions:
        match: "^https://api\\.spaceflightnewsapi\\.net/v4"

  # ─────────────────────────────────────────────────────────────────
  # PATHS — NAMING CONVENTIONS
  # ─────────────────────────────────────────────────────────────────
  paths-lowercase-kebab:
    description: Path segments must be lowercase kebab-case (snake_case not allowed in path segments).
    severity: warn
    given: $.paths
    then:
      function: pattern
      field: "@key"
      functionOptions:
        match: "^/[a-z0-9/{}_-]*$"

  paths-no-query-strings:
    description: Path keys must not contain query strings.
    severity: error
    given: $.paths
    then:
      function: pattern
      field: "@key"
      functionOptions:
        notMatch: "\\?"

  paths-trailing-slash-snapi-style:
    description: SNAPI paths end with a trailing slash by convention (`/articles/`, `/blogs/`, `/reports/`, `/info/`).
    severity: info
    given: $.paths
    then:
      function: pattern
      field: "@key"
      functionOptions:
        match: "/$"

  # ─────────────────────────────────────────────────────────────────
  # OPERATIONS
  # ─────────────────────────────────────────────────────────────────
  operation-operationid-required:
    description: Every operation must declare an operationId.
    severity: error
    given: $.paths[*][get,post,put,patch,delete]
    then:
      field: operationId
      function: truthy

  operation-operationid-camel-case:
    description: operationId should be camelCase (e.g. listArticles, retrieveBlog).
    severity: warn
    given: $.paths[*][get,post,put,patch,delete]
    then:
      field: operationId
      function: pattern
      functionOptions:
        match: "^[a-z][a-zA-Z0-9]+$"

  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-snapi-prefix:
    description: Operation summaries should begin with "Spaceflight News" prefix.
    severity: warn
    given: $.paths[*][get,post,put,patch,delete]
    then:
      field: summary
      function: pattern
      functionOptions:
        match: "^Spaceflight News "

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

  operation-tags-required:
    description: Every operation must declare at least one tag.
    severity: error
    given: $.paths[*][get,post,put,patch,delete]
    then:
      field: tags
      function: length
      functionOptions:
        min: 1

  operation-microcks-extension:
    description: Operations should declare x-microcks-operation for mock-server compatibility.
    severity: info
    given: $.paths[*][get,post,put,patch,delete]
    then:
      field: x-microcks-operation
      function: truthy

  # ─────────────────────────────────────────────────────────────────
  # TAGS
  # ─────────────────────────────────────────────────────────────────
  tag-global-defined:
    description: A global tags array should be defined at the document root.
    severity: warn
    given: $
    then:
      field: tags
      function: truthy

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

  tag-title-case-name:
    description: Tag names should be Title Case (Articles, Blogs, Reports, Info).
    severity: warn
    given: $.tags[*]
    then:
      field: name
      function: pattern
      functionOptions:
        match: "^[A-Z][a-zA-Z0-9 ]+$"

  # ─────────────────────────────────────────────────────────────────
  # PARAMETERS
  # ─────────────────────────────────────────────────────────────────
  parameter-description-required:
    description: Every parameter must have a description.
    severity: warn
    given: $..parameters[*]
    then:
      field: description
      function: truthy

  parameter-snake-case:
    description: Query/path parameter names should be snake_case (SNAPI convention).
    severity: warn
    given: $..parameters[?(@.in=='query' || @.in=='path')]
    then:
      field: name
      function: pattern
      functionOptions:
        match: "^[a-z][a-z0-9_]*$"

  parameter-pagination-offset-limit:
    description: Pagination uses offset and limit (SNAPI convention) rather than page/size or cursor.
    severity: info
    given: $..parameters[?(@.in=='query' && (@.name=='page' || @.name=='size' || @.name=='cursor'))]
    then:
      function: undefined

  parameter-schema-type:
    description: Every parameter must have a schema with a type.
    severity: warn
    given: $..parameters[*].schema
    then:
      field: type
      function: truthy

  # ─────────────────────────────────────────────────────────────────
  # RESPONSES
  # ─────────────────────────────────────────────────────────────────
  response-200-required:
    description: GET operations must declare a 200 response.
    severity: error
    given: $.paths[*].get.responses
    then:
      field: "200"
      function: truthy

  response-detail-404:
    description: Retrieve-by-id operations should declare a 404 response.
    severity: warn
    given: "$.paths[?(@property.match(/\\{id\\}/))].get.responses"
    then:
      field: "404"
      function: truthy

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

  response-json-content-type:
    description: Successful responses should use application/json.
    severity: warn
    given: $.paths[*][get,post,put,patch,delete].responses["200","201"].content
    then:
      field: application/json
      function: truthy

  # ─────────────────────────────────────────────────────────────────
  # SCHEMAS — PROPERTY NAMING
  # ─────────────────────────────────────────────────────────────────
  schema-property-snake-case:
    description: Schema properties should be snake_case (SNAPI convention).
    severity: warn
    given: $.components.schemas[*].properties
    then:
      function: pattern
      field: "@key"
      functionOptions:
        match: "^[a-z][a-z0-9_]*$"

  schema-description-required:
    description: Top-level component schemas should 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-readonly:
    description: id properties should be marked readOnly.
    severity: info
    given: $.components.schemas[*].properties.id
    then:
      field: readOnly
      function: truthy

  schema-updated-at-readonly:
    description: updated_at properties should be marked readOnly.
    severity: info
    given: $.components.schemas[*].properties.updated_at
    then:
      field: readOnly
      function: truthy

  schema-timestamps-date-time:
    description: published_at and updated_at must use format date-time.
    severity: warn
    given: $.components.schemas[*].properties[published_at,updated_at]
    then:
      field: format
      function: pattern
      functionOptions:
        match: "^date-time$"

  schema-url-format-uri:
    description: url and image_url properties must use format uri.
    severity: warn
    given: $.components.schemas[*].properties[url,image_url]
    then:
      field: format
      function: pattern
      functionOptions:
        match: "^uri$"

  schema-launch-uuid:
    description: launch_id must use format uuid.
    severity: warn
    given: $.components.schemas[*].properties.launch_id
    then:
      field: format
      function: pattern
      functionOptions:
        match: "^uuid$"

  # ─────────────────────────────────────────────────────────────────
  # SECURITY
  # ─────────────────────────────────────────────────────────────────
  security-public-api:
    description: SNAPI is a public open API; operations may declare empty security `- {}` to make this explicit.
    severity: info
    given: $.paths[*][get,post,put,patch,delete]
    then:
      field: security
      function: truthy

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

  # ─────────────────────────────────────────────────────────────────
  # GENERAL QUALITY
  # ─────────────────────────────────────────────────────────────────
  examples-encouraged:
    description: Schema properties should include an example value.
    severity: info
    given: $.components.schemas[*].properties[*]
    then:
      field: example
      function: truthy