# Spectral ruleset for the Tripleseat API
# Enforces the conventions observed across the Tripleseat OpenAPI specification:
# - Title prefix "Tripleseat"
# - OpenAPI 3.1.0
# - HTTPS server at api.tripleseat.com
# - /v1 versioned, snake_case resource paths with .json suffix
# - Title Case operation summaries, camelCase operationIds with verb prefixes
# - Title Case tags
# - snake_case parameters and schema properties
# - page-based pagination
# - OAuth 2.0 Bearer security
extends:
  - spectral:oas
rules:

  # ── INFO / METADATA ─────────────────────────────────────────────
  info-title-prefix:
    description: API title should start with "Tripleseat".
    severity: warn
    given: $.info.title
    then:
      function: pattern
      functionOptions:
        match: '^Tripleseat'
  info-description-required:
    description: API must have a description of at least 40 characters.
    severity: warn
    given: $.info
    then:
      field: description
      function: truthy
  info-contact-required:
    description: API must declare a contact.
    severity: warn
    given: $.info
    then:
      field: contact
      function: truthy

  # ── OPENAPI VERSION ─────────────────────────────────────────────
  openapi-version-31:
    description: Specs should target OpenAPI 3.1.0.
    severity: warn
    given: $.openapi
    then:
      function: pattern
      functionOptions:
        match: '^3\.1\.'

  # ── SERVERS ─────────────────────────────────────────────────────
  servers-defined:
    description: At least one server must be defined.
    severity: error
    given: $.servers
    then:
      function: truthy
  servers-https:
    description: Servers must use HTTPS.
    severity: error
    given: $.servers[*].url
    then:
      function: pattern
      functionOptions:
        match: '^https://'
  servers-tripleseat-host:
    description: Production server should be api.tripleseat.com.
    severity: info
    given: $.servers[*].url
    then:
      function: pattern
      functionOptions:
        match: 'api\.tripleseat\.com'

  # ── PATHS — NAMING CONVENTIONS ──────────────────────────────────
  paths-version-prefix:
    description: Paths should be versioned under /v1.
    severity: warn
    given: $.paths[*]~
    then:
      function: pattern
      functionOptions:
        match: '^/v1/'
  paths-snake-case:
    description: Path segments should be lowercase snake_case (allowing path params and .json suffix).
    severity: warn
    given: $.paths[*]~
    then:
      function: pattern
      functionOptions:
        match: '^(/v1)?(/[a-z0-9_]+(\.[a-z]+)?|/\{[a-z_]+\}(\.[a-z]+)?)+$'
  paths-no-trailing-slash:
    description: Paths must not end with a trailing slash.
    severity: error
    given: $.paths[*]~
    then:
      function: pattern
      functionOptions:
        notMatch: '.+/$'

  # ── OPERATIONS ──────────────────────────────────────────────────
  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-title-case:
    description: Operation summaries should be in Title Case.
    severity: warn
    given: $.paths[*][get,post,put,patch,delete].summary
    then:
      function: pattern
      functionOptions:
        match: '^[A-Z][A-Za-z0-9]*(\s[A-Z0-9][A-Za-z0-9]*)*$'
  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-id-required:
    description: Every operation must have an operationId.
    severity: error
    given: $.paths[*][get,post,put,patch,delete]
    then:
      field: operationId
      function: truthy
  operation-id-camel-case-verb:
    description: operationId should be camelCase and start with a verb (get/list/create/update/delete/search).
    severity: warn
    given: $.paths[*][get,post,put,patch,delete].operationId
    then:
      function: pattern
      functionOptions:
        match: '^(get|list|create|update|delete|search)[A-Z][A-Za-z0-9]*$'
  operation-tags-required:
    description: Every operation must declare at least one tag.
    severity: warn
    given: $.paths[*][get,post,put,patch,delete]
    then:
      field: tags
      function: truthy

  # ── TAGS ────────────────────────────────────────────────────────
  tags-global-defined:
    description: A global tags array should be defined.
    severity: info
    given: $
    then:
      field: tags
      function: truthy
  tag-description-required:
    description: Each global tag should have a description.
    severity: warn
    given: $.tags[*]
    then:
      field: description
      function: truthy
  tag-title-case:
    description: Tag names should be in Title Case.
    severity: warn
    given: $.tags[*].name
    then:
      function: pattern
      functionOptions:
        match: '^[A-Z][A-Za-z0-9]*(\s[A-Z0-9][A-Za-z0-9]*)*$'

  # ── PARAMETERS ──────────────────────────────────────────────────
  parameter-description-required:
    description: Every parameter should have a description.
    severity: warn
    given: $.paths[*][*].parameters[*]
    then:
      field: description
      function: truthy
  parameter-snake-case:
    description: Parameter names should be snake_case.
    severity: warn
    given: $.paths[*][*].parameters[*].name
    then:
      function: pattern
      functionOptions:
        match: '^[a-z][a-z0-9_]*$'
  parameter-pagination-page:
    description: Pagination should use the page parameter.
    severity: info
    given: $.paths[*][*].parameters[?(@.in=='query' && (@.name=='offset' || @.name=='limit' || @.name=='cursor'))]
    then:
      function: falsy

  # ── REQUEST BODIES ──────────────────────────────────────────────
  request-body-json:
    description: Request bodies should support application/json.
    severity: warn
    given: $.paths[*][post,put,patch].requestBody.content
    then:
      field: application/json
      function: truthy

  # ── RESPONSES ───────────────────────────────────────────────────
  response-success-defined:
    description: Each operation must define a 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: ['202']
            - required: ['204']
  response-unauthorized-defined:
    description: Operations should define a 401 response.
    severity: info
    given: $.paths[*][get,post,put,patch,delete].responses
    then:
      field: '401'
      function: truthy
  error-schema-message:
    description: The Error schema should expose an error field.
    severity: warn
    given: $.components.schemas.Error.properties
    then:
      field: error
      function: truthy

  # ── SCHEMAS — PROPERTY NAMING ───────────────────────────────────
  schema-property-snake-case:
    description: Schema property names should be snake_case (X-Signature header is exempt).
    severity: warn
    given: $.components.schemas[*].properties[*]~
    then:
      function: pattern
      functionOptions:
        match: '^([a-z][a-z0-9_]*|X-Signature)$'
  schema-id-integer:
    description: id properties should be typed as integer.
    severity: info
    given: $.components.schemas[*].properties.id
    then:
      field: type
      function: truthy

  # ── SECURITY ────────────────────────────────────────────────────
  security-global-defined:
    description: A global security requirement should be defined.
    severity: warn
    given: $
    then:
      field: security
      function: truthy
  security-oauth2-scheme:
    description: An oauth2 security scheme should be defined.
    severity: warn
    given: $.components.securitySchemes
    then:
      field: oauth2
      function: truthy

  # ── HTTP METHOD CONVENTIONS ─────────────────────────────────────
  get-no-request-body:
    description: GET operations must not declare a request body.
    severity: error
    given: $.paths[*].get
    then:
      field: requestBody
      function: falsy
  post-put-request-body:
    description: POST and PUT operations should declare a request body.
    severity: warn
    given: $.paths[*][post,put]
    then:
      field: requestBody
      function: truthy

  # ── GENERAL QUALITY ─────────────────────────────────────────────
  examples-encouraged:
    description: Operations are encouraged to provide response examples.
    severity: info
    given: $.paths[*][get,post,put,patch,delete].responses[*].content.application/json
    then:
      field: examples
      function: truthy