# Mojang Spectral Ruleset
# ------------------------------------------------------------------------
# Enforces the conventions observed across the Mojang OpenAPI surface:
#   - kebab-case lowercase paths under three documented hosts
#   - PascalCase tags grouped by capability (Identity, Profile, Skins,
#     Capes, Friends, Presence, Keys, Entitlements, Session, Textures,
#     Server, Authentication, Attributes, Blocklist)
#   - camelCase operationIds prefixed with a verb (get, lookup, change,
#     update, report, reset, show, hide, join, login, check, has)
#   - camelCase JSON property names with PascalCase schema names
#   - Bearer auth on every authenticated path; public endpoints declare
#     no security
#   - Operation summaries title-cased and prefixed with "Mojang " or
#     "Minecraft Services " when used downstream
#   - Microcks compatibility (x-microcks-operation on every operation)

rules:

  # =========================================================
  # INFO / METADATA
  # =========================================================
  info-title-required:
    description: Every Mojang spec must declare info.title.
    severity: error
    given: $.info
    then:
      field: title
      function: truthy

  info-title-mojang-or-minecraft-prefix:
    description: >-
      Spec titles must start with "Mojang " or "Minecraft Services " to
      identify which host surface the document describes.
    severity: warn
    given: $.info.title
    then:
      function: pattern
      functionOptions:
        match: '^(Mojang|Minecraft Services)\b.*'

  info-description-required:
    description: Spec info must include a meaningful description.
    severity: warn
    given: $.info
    then:
      field: description
      function: truthy

  info-version-required:
    description: Spec version must be declared.
    severity: error
    given: $.info
    then:
      field: version
      function: truthy

  info-contact-required:
    description: Provide a contact block pointing to www.minecraft.net.
    severity: info
    given: $.info
    then:
      field: contact
      function: truthy

  info-license-required:
    description: Spec must reference Mojang's brand-and-asset usage guidelines.
    severity: info
    given: $.info
    then:
      field: license
      function: truthy

  # =========================================================
  # OPENAPI VERSION
  # =========================================================
  openapi-version-3:
    description: Mojang specs are emitted as OpenAPI 3.0.x.
    severity: error
    given: $.openapi
    then:
      function: pattern
      functionOptions:
        match: '^3\.0\.\d+$'

  # =========================================================
  # SERVERS
  # =========================================================
  servers-defined:
    description: Every spec must declare at least one server URL.
    severity: error
    given: $
    then:
      field: servers
      function: truthy

  servers-https-required:
    description: Mojang only serves over HTTPS.
    severity: error
    given: $.servers[*].url
    then:
      function: pattern
      functionOptions:
        match: '^https://'

  servers-canonical-mojang-host:
    description: >-
      The server URL must match one of the documented Mojang hosts
      (api.mojang.com, sessionserver.mojang.com, api.minecraftservices.com).
    severity: warn
    given: $.servers[*].url
    then:
      function: pattern
      functionOptions:
        match: '^https://(api\.mojang\.com|sessionserver\.mojang\.com|api\.minecraftservices\.com)$'

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

  # =========================================================
  # PATHS — NAMING CONVENTIONS
  # =========================================================
  paths-kebab-case:
    description: Path segments use lowercase kebab-case (or template parameters).
    severity: warn
    given: $.paths[*]~
    then:
      function: pattern
      functionOptions:
        match: '^\/([a-z0-9\-]+|\{[a-zA-Z]+\})(\/([a-z0-9\-]+|\{[a-zA-Z]+\}))*$'

  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 embed query strings; use parameters instead.
    severity: error
    given: $.paths[*]~
    then:
      function: pattern
      functionOptions:
        notMatch: '\?'

  # =========================================================
  # 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 must use 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 one of the Mojang verb prefixes (get,
      lookup, change, update, report, reset, show, hide, join, login,
      check, has).
    severity: warn
    given: $.paths[*][get,post,put,patch,delete].operationId
    then:
      function: pattern
      functionOptions:
        match: '^(get|lookup|change|update|report|reset|show|hide|join|login|check|has)[A-Z]'

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

  operation-summary-title-case:
    description: >-
      Summaries are Title Case (first word capitalised, every significant
      word capitalised). Acronyms such as UUID are preserved.
    severity: warn
    given: $.paths[*][get,post,put,patch,delete].summary
    then:
      function: pattern
      functionOptions:
        match: '^[A-Z][A-Za-z0-9\(\) \-]*$'

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

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

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

  # =========================================================
  # TAGS
  # =========================================================
  tag-pascal-case:
    description: Tags are PascalCase capability names.
    severity: warn
    given: $.tags[*].name
    then:
      function: pattern
      functionOptions:
        match: '^[A-Z][A-Za-z]*$'

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

  # =========================================================
  # PARAMETERS
  # =========================================================
  parameter-description-required:
    description: Every parameter must declare 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 with a type.
    severity: error
    given: $.paths[*][get,post,put,patch,delete].parameters[*]
    then:
      field: schema
      function: truthy

  parameter-name-camel-case:
    description: >-
      Query, path and header parameter names use camelCase (uuid, username,
      serverId, prevent_proxy is a legacy exception). Headers may use
      hyphen-case.
    severity: info
    given: $.paths[*][get,post,put,patch,delete].parameters[?(@.in=='query' || @.in=='path')]
    then:
      field: name
      function: pattern
      functionOptions:
        match: '^[a-z][a-zA-Z0-9_]*$'

  parameter-example-encouraged:
    description: Provide an example for each parameter to support Microcks mocks.
    severity: info
    given: $.paths[*][get,post,put,patch,delete].parameters[*]
    then:
      field: example
      function: truthy

  # =========================================================
  # REQUEST BODIES
  # =========================================================
  request-body-json-content:
    description: Request bodies must include an application/json media type.
    severity: warn
    given: $.paths[*][post,put,patch].requestBody.content
    then:
      field: application/json
      function: truthy

  request-body-description-required:
    description: Request bodies must declare a description.
    severity: info
    given: $.paths[*][post,put,patch].requestBody
    then:
      field: description
      function: truthy

  # =========================================================
  # RESPONSES
  # =========================================================
  response-success-required:
    description: Every operation must declare at least one 2xx response.
    severity: error
    given: $.paths[*][get,post,put,patch,delete].responses
    then:
      function: schema
      functionOptions:
        schema:
          type: object
          anyOf:
            - required: ['200']
            - required: ['201']
            - required: ['204']

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

  response-401-on-authenticated:
    description: >-
      Authenticated paths must document 401 to make missing-token behaviour
      explicit for clients.
    severity: info
    given: $.paths[*][get,post,put,patch,delete][?(@.security)]
    then:
      field: responses.401
      function: truthy

  response-429-encouraged:
    description: Mojang rate limits aggressively; document 429 where appropriate.
    severity: info
    given: $.paths[*][get,post,put,patch,delete].responses
    then:
      field: '429'
      function: truthy

  # =========================================================
  # SCHEMAS — PROPERTY NAMING
  # =========================================================
  schema-name-pascal-case:
    description: Component schema names use PascalCase.
    severity: warn
    given: $.components.schemas[*]~
    then:
      function: pattern
      functionOptions:
        match: '^[A-Z][A-Za-z0-9]*$'

  schema-property-camel-case:
    description: >-
      JSON property names use camelCase across the Mojang surface (id,
      name, capeId, profileActions, lastUpdated, ...). Legacy snake_case
      such as access_token in the OAuth response is tolerated; otherwise
      stick to camelCase.
    severity: info
    given: $.components.schemas[*].properties[*]~
    then:
      function: pattern
      functionOptions:
        match: '^[a-z][a-zA-Z0-9_]*$'

  schema-description-required:
    description: Top-level schemas must carry a description.
    severity: warn
    given: $.components.schemas[*]
    then:
      field: description
      function: truthy

  schema-property-type-required:
    description: Each non-$ref schema property must declare a type.
    severity: warn
    given: $.components.schemas[*].properties[?(!@property.match(/^\$ref$/))][?(!@.$ref)]
    then:
      field: type
      function: truthy

  # =========================================================
  # SECURITY
  # =========================================================
  security-scheme-defined:
    description: Bearer scheme must be defined when authenticated paths exist.
    severity: warn
    given: $.components.securitySchemes
    then:
      function: truthy

  security-bearer-format:
    description: When defined, the bearer scheme must use JWT bearerFormat.
    severity: info
    given: $.components.securitySchemes.bearerAuth
    then:
      function: schema
      functionOptions:
        schema:
          type: object
          properties:
            type:
              const: http
            scheme:
              const: bearer

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

  http-delete-returns-204-or-200:
    description: DELETE operations must return 200 or 204.
    severity: warn
    given: $.paths[*].delete.responses
    then:
      function: schema
      functionOptions:
        schema:
          type: object
          anyOf:
            - required: ['200']
            - required: ['204']

  # =========================================================
  # GENERAL QUALITY
  # =========================================================
  general-no-empty-descriptions:
    description: Descriptions must not be empty strings.
    severity: warn
    given: '$..description'
    then:
      function: truthy

  general-deprecation-documented:
    description: >-
      Deprecated operations must be flagged with `deprecated: true` and
      explain the migration path in their description (e.g. /user/profiles/
      {uuid}/names returns 410 Gone).
    severity: info
    given: $.paths[*][get,post,put,patch,delete][?(@.deprecated == true)]
    then:
      field: description
      function: truthy