extends: spectral:oas

rules:

  # ── INFO / METADATA ──────────────────────────────────────────────
  info-title-reqres-prefix:
    description: Spec title should begin with "ReqRes".
    severity: warn
    given: $.info
    then:
      field: title
      function: pattern
      functionOptions:
        match: '^ReqRes'

  info-description-required:
    description: Spec must include a non-empty description.
    severity: error
    given: $.info
    then:
      field: description
      function: truthy

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

  info-contact-required:
    description: Spec should declare a contact block.
    severity: warn
    given: $.info
    then:
      field: contact
      function: truthy

  info-license-required:
    description: Spec must include license info (ReqRes is MIT).
    severity: warn
    given: $.info
    then:
      field: license
      function: truthy

  # ── OPENAPI VERSION ──────────────────────────────────────────────
  openapi-version-3-0-x:
    description: Specs must target OpenAPI 3.0.x.
    severity: warn
    given: $.openapi
    then:
      function: pattern
      functionOptions:
        match: '^3\.0\.'

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

  servers-https-required:
    description: All production server URLs must use HTTPS.
    severity: error
    given: $.servers[?(@.url =~ /^https?:\/\/(?!localhost)/)].url
    then:
      function: pattern
      functionOptions:
        match: '^https://'

  servers-reqres-host:
    description: Production server URL should point at reqres.in.
    severity: warn
    given: $.servers[?(!@.url.includes("localhost"))].url
    then:
      function: pattern
      functionOptions:
        match: 'reqres\.in'

  # ── PATHS — NAMING CONVENTIONS ───────────────────────────────────
  paths-lowercase:
    description: Paths must be lowercase kebab-case.
    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.
    severity: error
    given: $.paths.*~
    then:
      function: pattern
      functionOptions:
        notMatch: '.+/$'

  paths-prefix-known:
    description: Top-level path segments must be one of /api, /app, /agent.
    severity: warn
    given: $.paths.*~
    then:
      function: pattern
      functionOptions:
        match: '^/(api|app|agent)(/.*)?$'

  paths-plural-resources:
    description: Resource collections should use plural nouns (users, collections, app-users, orders).
    severity: info
    given: $.paths.*~
    then:
      function: pattern
      functionOptions:
        notMatch: '^/(api|app|agent/v\d+)/(user|collection|order|scenario)(/|$)'

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

  operation-summary-reqres-prefix:
    description: Every operation summary must start with "ReqRes".
    severity: warn
    given: $.paths.*[get,post,put,patch,delete].summary
    then:
      function: pattern
      functionOptions:
        match: '^ReqRes'

  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-camelcase:
    description: operationId 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 should begin with a known verb (list/get/create/update/delete/login/register/logout/verify/simulate).
    severity: info
    given: $.paths.*[get,post,put,patch,delete].operationId
    then:
      function: pattern
      functionOptions:
        match: '^(list|get|create|update|replace|delete|login|register|logout|verify|simulate|fetch|run|execute|invoke|trigger)[A-Z]'

  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: truthy

  operation-security-required:
    description: Every /api/* and /app/* operation must declare security; /agent/v1/* may be public.
    severity: warn
    given: $.paths[?(@property.match(/^\/(api|app)\//))][get,post,put,patch,delete]
    then:
      field: security
      function: truthy

  operation-microcks-extension:
    description: Every operation 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-title-case:
    description: Global tag names must use Title Case (Legacy, Authentication, Collections, App Users, Custom Endpoints, Agent Sandbox).
    severity: warn
    given: $.tags[*].name
    then:
      function: pattern
      functionOptions:
        match: '^[A-Z][A-Za-z]+( [A-Z][A-Za-z]+)*$'

  tag-description-recommended:
    description: Each global tag should include a description.
    severity: info
    given: $.tags[*]
    then:
      field: description
      function: truthy

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

  parameter-snake-or-camel:
    description: Parameter names must be snake_case or camelCase (page, per_page, recordId).
    severity: warn
    given: $.paths.*[get,post,put,patch,delete].parameters[*].name
    then:
      function: pattern
      functionOptions:
        match: '^[a-z][a-z0-9_]*$|^[a-z][a-zA-Z0-9]*$'

  parameter-pagination-page-per-page:
    description: Pagination parameters should be named page and per_page (ReqRes convention).
    severity: info
    given: $.paths.*[get,post,put,patch,delete].parameters[?(@.in=="query" && (@.name=="limit" || @.name=="offset"))]
    then:
      field: name
      function: pattern
      functionOptions:
        notMatch: '^(limit|offset)$'

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

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

  # ── RESPONSES ────────────────────────────────────────────────────
  response-success-required:
    description: Every operation must define a 2xx success response.
    severity: error
    given: $.paths.*[get,post,put,patch,delete].responses
    then:
      function: schema
      functionOptions:
        schema:
          type: object
          patternProperties:
            '^2\d\d$': {}
          minProperties: 1

  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:
    description: Success responses must return application/json.
    severity: warn
    given: $.paths.*[get,post,put,patch,delete].responses[?(@property.match(/^2\d\d$/))].content
    then:
      field: application/json
      function: truthy

  response-401-on-secured:
    description: Secured operations should declare a 401 response.
    severity: info
    given: $.paths.*[get,post,put,patch,delete][?(@.security)]
    then:
      field: responses.401
      function: truthy

  # ── SCHEMAS — PROPERTY NAMING ────────────────────────────────────
  schema-property-snake-or-camel:
    description: Schema property names should be snake_case or camelCase.
    severity: info
    given: $.components.schemas.*.properties.*~
    then:
      function: pattern
      functionOptions:
        match: '^[a-z][a-z0-9_]*$|^[a-z][a-zA-Z0-9]*$|^\$[a-z]+$|^@.+$'

  schema-description-recommended:
    description: Top-level schemas should include a description.
    severity: info
    given: $.components.schemas.*
    then:
      field: description
      function: truthy

  schema-type-required:
    description: Top-level schemas must declare a type.
    severity: error
    given: $.components.schemas.*
    then:
      field: type
      function: truthy

  # ── SECURITY ─────────────────────────────────────────────────────
  security-schemes-defined:
    description: components.securitySchemes must define ApiKeyAuth and BearerAuth.
    severity: error
    given: $.components.securitySchemes
    then:
      function: truthy

  security-apikey-header:
    description: ApiKeyAuth must use the x-api-key header.
    severity: warn
    given: $.components.securitySchemes.ApiKeyAuth
    then:
      function: schema
      functionOptions:
        schema:
          type: object
          properties:
            type: { const: apiKey }
            in: { const: header }
            name: { const: x-api-key }
          required: [type, in, name]

  security-bearer-format:
    description: BearerAuth must be an HTTP bearer scheme.
    severity: warn
    given: $.components.securitySchemes.BearerAuth
    then:
      function: schema
      functionOptions:
        schema:
          type: object
          properties:
            type: { const: http }
            scheme: { const: bearer }
          required: [type, scheme]

  # ── 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

  delete-no-request-body:
    description: DELETE operations must not declare a request body.
    severity: error
    given: $.paths.*.delete
    then:
      field: requestBody
      function: falsy

  post-put-patch-require-body:
    description: POST, PUT, and PATCH operations should declare a request body (login/register/logout exempt).
    severity: info
    given: $.paths.*[put,patch]
    then:
      field: requestBody
      function: truthy

  # ── GENERAL QUALITY ──────────────────────────────────────────────
  no-empty-descriptions:
    description: Descriptions must be non-empty when present.
    severity: warn
    given: '$..description'
    then:
      function: truthy