openapi: 3.1.0
info:
  title: Proxy Pool Admin API
  version: 1.0.0
  description: 运维状态与受控变更接口。该入口必须与 Distribution 分端口和权限。
servers:
  - url: http://127.0.0.1:8082
tags:
  - name: Status
  - name: Upstreams
  - name: Routing
  - name: Configuration
security:
  - AdminApiKey: []
  - BasicAuth: []
  - BearerAuth: []
paths:
  /api/v1/status:
    get:
      tags: [Status]
      operationId: getStatus
      summary: 获取控制面摘要状态
      responses:
        '200':
          description: 不含 Proxy 地址、Client 标识或 Secret 的聚合状态
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Status'
        '401': {$ref: '#/components/responses/Unauthorized'}
        '403': {$ref: '#/components/responses/Forbidden'}
  /api/v1/upstreams/{name}/enable:
    post:
      tags: [Upstreams]
      operationId: enableUpstream
      summary: 启用 Upstream
      parameters:
        - $ref: '#/components/parameters/UpstreamName'
        - $ref: '#/components/parameters/RequestID'
      responses:
        '200': {$ref: '#/components/responses/MutationResult'}
        '401': {$ref: '#/components/responses/Unauthorized'}
        '403': {$ref: '#/components/responses/Forbidden'}
        '404': {$ref: '#/components/responses/NotFound'}
        '409': {$ref: '#/components/responses/Conflict'}
  /api/v1/upstreams/{name}/disable:
    post:
      tags: [Upstreams]
      operationId: disableUpstream
      summary: 禁用 Upstream 并使已有资源自然 Drain
      parameters:
        - $ref: '#/components/parameters/UpstreamName'
        - $ref: '#/components/parameters/RequestID'
      responses:
        '200': {$ref: '#/components/responses/MutationResult'}
        '401': {$ref: '#/components/responses/Unauthorized'}
        '403': {$ref: '#/components/responses/Forbidden'}
        '404': {$ref: '#/components/responses/NotFound'}
        '409': {$ref: '#/components/responses/Conflict'}
  /api/v1/routing/{name}/switch:
    post:
      tags: [Routing]
      operationId: switchRouting
      summary: 原子切换 Sequential Routing 当前 Upstream
      parameters:
        - name: name
          in: path
          required: true
          schema: {type: string, minLength: 1, maxLength: 128}
        - $ref: '#/components/parameters/RequestID'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              additionalProperties: false
              required: [expectedCurrent, target]
              properties:
                expectedCurrent: {type: string}
                target: {type: string}
                reason: {type: string, maxLength: 512}
      responses:
        '200': {$ref: '#/components/responses/MutationResult'}
        '401': {$ref: '#/components/responses/Unauthorized'}
        '403': {$ref: '#/components/responses/Forbidden'}
        '404': {$ref: '#/components/responses/NotFound'}
        '409': {$ref: '#/components/responses/Conflict'}
  /api/v1/config/reload:
    post:
      tags: [Configuration]
      operationId: reloadConfiguration
      summary: 严格校验并原子发布新配置快照
      parameters:
        - $ref: '#/components/parameters/RequestID'
      responses:
        '200': {$ref: '#/components/responses/MutationResult'}
        '401': {$ref: '#/components/responses/Unauthorized'}
        '403': {$ref: '#/components/responses/Forbidden'}
        '409': {$ref: '#/components/responses/Conflict'}
        '422':
          description: 新配置无效，旧配置继续运行
          content:
            application/problem+json:
              schema: {$ref: '#/components/schemas/Problem'}
components:
  securitySchemes:
    AdminApiKey: {type: apiKey, in: header, name: X-Admin-Key}
    BasicAuth: {type: http, scheme: basic}
    BearerAuth: {type: http, scheme: bearer}
  parameters:
    UpstreamName:
      name: name
      in: path
      required: true
      schema: {type: string, minLength: 1, maxLength: 128}
    RequestID:
      name: X-Request-ID
      in: header
      required: false
      schema: {type: string, maxLength: 128}
  schemas:
    Status:
      type: object
      additionalProperties: false
      required: [configVersion, snapshotVersion, upstreams, workers]
      properties:
        configVersion: {type: string}
        snapshotVersion: {type: integer, minimum: 0}
        upstreams:
          type: array
          items:
            type: object
            additionalProperties: false
            required: [name, enabled, available, checking, suspect, draining, extracted]
            properties:
              name: {type: string}
              enabled: {type: boolean}
              available: {type: integer, minimum: 0}
              checking: {type: integer, minimum: 0}
              suspect: {type: integer, minimum: 0}
              draining: {type: integer, minimum: 0}
              extracted: {type: integer, minimum: 0}
              consecutiveEmptyFetch: {type: integer, minimum: 0}
              fetchErrorCount: {type: integer, minimum: 0}
        workers:
          type: array
          items:
            type: object
            additionalProperties: false
            required: [id, zone, connected, snapshotVersion]
            properties:
              id: {type: string}
              zone: {type: string}
              connected: {type: boolean}
              snapshotVersion: {type: integer, minimum: 0}
              staleSeconds: {type: integer, minimum: 0}
    MutationResult:
      type: object
      additionalProperties: false
      required: [requestId, changed, version]
      properties:
        requestId: {type: string}
        changed: {type: boolean}
        version: {type: integer, minimum: 0}
        message: {type: string}
    Problem:
      type: object
      required: [type, title, status, code]
      properties:
        type: {type: string, format: uri}
        title: {type: string}
        status: {type: integer}
        code: {type: string}
        detail: {type: string}
        requestId: {type: string}
  responses:
    MutationResult:
      description: 操作已提交或目标状态原本已满足
      content:
        application/json:
          schema: {$ref: '#/components/schemas/MutationResult'}
    Unauthorized:
      description: 管理入口认证失败
      content:
        application/problem+json:
          schema: {$ref: '#/components/schemas/Problem'}
    Forbidden:
      description: 调用主体无该管理权限
      content:
        application/problem+json:
          schema: {$ref: '#/components/schemas/Problem'}
    NotFound:
      description: Upstream 或 Routing 不存在
      content:
        application/problem+json:
          schema: {$ref: '#/components/schemas/Problem'}
    Conflict:
      description: 预期版本或 expectedCurrent 与权威状态不一致
      content:
        application/problem+json:
          schema: {$ref: '#/components/schemas/Problem'}