extends:
  - spectral:oas

# Spectral ruleset for the AMC Theatres API.
# Reflects conventions observed in developers.amctheatres.com:
# - Resources are under /v1, /v2, /v3, /v4 prefixes per resource family
# - Auth is via the X-AMC-Vendor-Key header (apiKey)
# - Collection responses use HAL-style _embedded + pageSize/pageNumber/count
# - Path segments and query parameter names use kebab-case
# - operationIds use camelCase
# - tags use Title Case

rules:

  # =============================================================
  # INFO / METADATA
  # =============================================================

  amc-info-title-required:
    description: API title must be present.
    severity: error
    given: $.info
    then:
      field: title
      function: truthy

  amc-info-title-format:
    description: Title should start with "AMC".
    severity: warn
    given: $.info.title
    then:
      function: pattern
      functionOptions:
        match: "^AMC "

  amc-info-description-min-length:
    description: API description should be substantive (>= 80 chars).
    severity: warn
    given: $.info.description
    then:
      function: length
      functionOptions:
        min: 80

  amc-info-contact-required:
    description: Contact information must be provided.
    severity: warn
    given: $.info
    then:
      field: contact
      function: truthy

  amc-info-license-required:
    description: License must be declared (AMC API Terms of Use).
    severity: warn
    given: $.info
    then:
      field: license
      function: truthy

  # =============================================================
  # SERVERS
  # =============================================================

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

  amc-servers-amctheatres-host:
    description: Server URL must point at api.amctheatres.com.
    severity: error
    given: $.servers[*].url
    then:
      function: pattern
      functionOptions:
        match: "^https://api\\.amctheatres\\.com"

  amc-servers-https-only:
    description: AMC API only supports HTTPS.
    severity: error
    given: $.servers[*].url
    then:
      function: pattern
      functionOptions:
        match: "^https://"

  # =============================================================
  # SECURITY
  # =============================================================

  amc-security-vendor-key-defined:
    description: A vendor-key apiKey security scheme must be defined.
    severity: error
    given: $.components.securitySchemes
    then:
      field: VendorKey
      function: truthy

  amc-security-vendor-key-header:
    description: Vendor key must be provided in the X-AMC-Vendor-Key header.
    severity: error
    given: $.components.securitySchemes.VendorKey
    then:
      - field: type
        function: pattern
        functionOptions:
          match: "^apiKey$"
      - field: in
        function: pattern
        functionOptions:
          match: "^header$"
      - field: name
        function: pattern
        functionOptions:
          match: "^X-AMC-Vendor-Key$"

  amc-security-applied-globally:
    description: The vendor-key security requirement must be applied globally.
    severity: error
    given: $
    then:
      field: security
      function: truthy

  # =============================================================
  # PATHS
  # =============================================================

  amc-paths-versioned:
    description: All paths must be versioned (/v1, /v2, /v3, /v4).
    severity: error
    given: $.paths.*~
    then:
      function: pattern
      functionOptions:
        match: "^/v[1-4](/|$)"

  amc-paths-kebab-case:
    description: Path segments (excluding parameters) must be kebab-case.
    severity: warn
    given: $.paths.*~
    then:
      function: pattern
      functionOptions:
        match: "^(/v[1-4])(/(\\{[a-zA-Z][a-zA-Z0-9_-]*\\}|[a-z][a-z0-9-]*))*/?$"

  amc-paths-no-trailing-slash:
    description: Paths should not end with a trailing slash (except documented order email lookup).
    severity: warn
    given: $.paths.*~
    then:
      function: pattern
      functionOptions:
        notMatch: "[a-z0-9}]/$"

  # =============================================================
  # OPERATIONS
  # =============================================================

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

  amc-operation-operationId-camelcase:
    description: operationId must be camelCase.
    severity: warn
    given: $.paths[*][get,post,put,delete,patch].operationId
    then:
      function: pattern
      functionOptions:
        match: "^[a-z][a-zA-Z0-9]*$"

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

  amc-operation-summary-title-case:
    description: Summary should use Title Case.
    severity: warn
    given: $.paths[*][get,post,put,delete,patch].summary
    then:
      function: pattern
      functionOptions:
        match: "^([A-Z][a-zA-Z0-9]*)( ([A-Z][a-zA-Z0-9]*|[a-z]{1,3}|By|For|To|And|Or|In|On|Of))*$"

  amc-operation-tags-required:
    description: Every operation must have at least one tag.
    severity: warn
    given: $.paths[*][get,post,put,delete,patch]
    then:
      field: tags
      function: truthy

  amc-operation-tag-titlecase:
    description: Tag names use Title Case (e.g., Theatres, Showtimes, Loyalty).
    severity: warn
    given: $.paths[*][get,post,put,delete,patch].tags[*]
    then:
      function: pattern
      functionOptions:
        match: "^[A-Z][a-zA-Z]*$"

  amc-operation-200-response:
    description: Read operations should declare a 200 response.
    severity: warn
    given: $.paths[*].get.responses
    then:
      field: '200'
      function: truthy

  amc-operation-201-on-create:
    description: POST operations that create resources should return 201.
    severity: info
    given: "$.paths[?(@property.match(/orders|webhooks|registration|redemptions/))].post.responses"
    then:
      field: '201'
      function: truthy

  # =============================================================
  # PARAMETERS
  # =============================================================

  amc-parameter-name-kebab-case:
    description: Query and path parameter names should use kebab-case (page-size, theatre-number, etc.).
    severity: warn
    given: "$..parameters[?(@.in == 'query' || @.in == 'path')].name"
    then:
      function: pattern
      functionOptions:
        match: "^[a-z][a-z0-9]*(-[a-z0-9]+)*$"

  amc-parameter-pagination-pair:
    description: When page-size is used, page-number should also be available.
    severity: info
    given: "$.paths[*][get]"
    then:
      function: schema
      functionOptions:
        schema:
          type: object

  # =============================================================
  # SCHEMAS
  # =============================================================

  amc-schemas-collection-envelope:
    description: Collection schemas should include pageSize, pageNumber, count, and _embedded.
    severity: info
    given: $.components.schemas[?(@property.match(/Collection$/))].allOf[0]
    then:
      function: truthy

  amc-schemas-hal-links:
    description: Resources should expose HAL-style _links where applicable.
    severity: info
    given: $.components.schemas
    then:
      field: HalLinks
      function: truthy

  amc-schemas-property-camelcase:
    description: Schema properties should use camelCase.
    severity: warn
    given: $.components.schemas[*].properties.*~
    then:
      function: pattern
      functionOptions:
        match: "^[a-z][a-zA-Z0-9]*$"

  # =============================================================
  # RESPONSES
  # =============================================================

  amc-responses-error-content:
    description: Error responses should reference the ApiError schema.
    severity: info
    given: "$.components.responses.NotFound.content['application/json'].schema"
    then:
      field: $ref
      function: truthy