openapi: 3.0.3
info:
  title: Intent Classification API
  description: API สำหรับ Intent Classification ตาม ADR-024 (Hybrid Pattern First → LLM Fallback)
  version: 1.0.0
  contact:
    name: NAP-DMS Development Team

servers:
  - url: http://localhost:3001/api
    description: Local Development
  - url: https://api.nap-dms.work/api
    description: Production

tags:
  - name: Intent Classification
    description: แปลงคำถามธรรมชาติ → Server-side Intent
  - name: Intent Management
    description: Admin API สำหรับจัดการ Intent Definitions และ Patterns

paths:
  # === Intent Classification ===
  /ai/intent/classify:
    post:
      summary: Classify User Query
      description: |
        แปลงคำถามธรรมชาติจาก User เป็น Server-side Intent enum
        ใช้ Hybrid Strategy: Pattern First → LLM Fallback
      tags: [Intent Classification]
      security:
        - bearerAuth: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ClassifyQueryRequest'
            example:
              query: "สรุปเอกสารนี้"
              projectPublicId: "019505a1-7c3e-7000-8000-abc123def456"
      responses:
        '200':
          description: Classification successful
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ClassificationResult'
              examples:
                pattern-match:
                  summary: Pattern Match (cache hit)
                  value:
                    intentCode: "SUMMARIZE_DOCUMENT"
                    confidence: 1.0
                    method: "pattern"
                    latencyMs: 8
                llm-fallback:
                  summary: LLM Fallback
                  value:
                    intentCode: "GET_RFA"
                    confidence: 0.85
                    method: "llm_fallback"
                    params:
                      contractPublicId: "019505a1-7c3e-7000-8000-xyz789abc123"
                    latencyMs: 1250
                fallback:
                  summary: No Match (FALLBACK)
                  value:
                    intentCode: "FALLBACK"
                    confidence: 0.0
                    method: "llm_fallback"
                    latencyMs: 2100
        '400':
          description: Invalid request (missing query)
        '401':
          description: Unauthorized
        '429':
          description: Too many requests (rate limit)

  # === Intent Definitions (Admin) ===
  /admin/ai/intent-definitions:
    get:
      summary: List Intent Definitions
      description: ดึงรายการ Intent Definitions ทั้งหมด
      tags: [Intent Management]
      security:
        - bearerAuth: []
      parameters:
        - name: category
          in: query
          schema:
            type: string
            enum: [read, suggest, utility]
          description: Filter by category
        - name: isActive
          in: query
          schema:
            type: boolean
          description: Filter by active status
      responses:
        '200':
          description: List of intent definitions
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/IntentDefinition'

    post:
      summary: Create Intent Definition
      description: สร้าง Intent Definition ใหม่ (System Admin only)
      tags: [Intent Management]
      security:
        - bearerAuth: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateIntentDefinitionRequest'
      responses:
        '201':
          description: Created
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/IntentDefinition'
        '409':
          description: Intent code already exists

  /admin/ai/intent-definitions/{intentCode}:
    parameters:
      - name: intentCode
        in: path
        required: true
        schema:
          type: string
        example: "GET_RFA"

    get:
      summary: Get Intent Definition
      tags: [Intent Management]
      security:
        - bearerAuth: []
      responses:
        '200':
          description: Intent definition found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/IntentDefinition'
        '404':
          description: Intent not found

    patch:
      summary: Update Intent Definition
      tags: [Intent Management]
      security:
        - bearerAuth: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/UpdateIntentDefinitionRequest'
      responses:
        '200':
          description: Updated
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/IntentDefinition'

  # === Intent Patterns (Admin) ===
  /admin/ai/intent-definitions/{intentCode}/patterns:
    parameters:
      - name: intentCode
        in: path
        required: true
        schema:
          type: string

    get:
      summary: List Patterns for Intent
      tags: [Intent Management]
      security:
        - bearerAuth: []
      responses:
        '200':
          description: List of patterns
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/IntentPattern'

    post:
      summary: Create Pattern for Intent
      description: เพิ่ม Pattern ใหม่สำหรับ Intent นี้
      tags: [Intent Management]
      security:
        - bearerAuth: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateIntentPatternRequest'
      responses:
        '201':
          description: Created
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/IntentPattern'
        '400':
          description: Invalid regex pattern

  /admin/ai/intent-patterns/{publicId}:
    parameters:
      - name: publicId
        in: path
        required: true
        schema:
          type: string
          format: uuid

    get:
      summary: Get Pattern
      tags: [Intent Management]
      security:
        - bearerAuth: []
      responses:
        '200':
          description: Pattern found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/IntentPattern'

    patch:
      summary: Update Pattern
      tags: [Intent Management]
      security:
        - bearerAuth: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/UpdateIntentPatternRequest'
      responses:
        '200':
          description: Updated

    delete:
      summary: Delete Pattern (soft delete)
      tags: [Intent Management]
      security:
        - bearerAuth: []
      responses:
        '204':
          description: Deleted

components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT

  schemas:
    # === Classification ===
    ClassifyQueryRequest:
      type: object
      required: [query]
      properties:
        query:
          type: string
          maxLength: 200
          description: คำถามจาก user (trim แล้ว)
          example: "สรุปเอกสารนี้"
        projectPublicId:
          type: string
          format: uuid
          description: Context project
        userPublicId:
          type: string
          format: uuid
          description: Context user
        currentDocumentId:
          type: string
          format: uuid
          description: Document ที่เปิดอยู่ (ถ้ามี)

    ClassificationResult:
      type: object
      properties:
        intentCode:
          type: string
          description: Intent ที่จำแนกได้
          example: "SUMMARIZE_DOCUMENT"
        confidence:
          type: number
          minimum: 0
          maximum: 1
          description: ความมั่นใจ (1.0 = pattern match)
          example: 1.0
        method:
          type: string
          enum: [pattern, llm_fallback, semaphore_overflow, llm_error]
          description: วิธีที่ใช้จำแนก
        params:
          type: object
          additionalProperties: true
          description: Parameters ที่สกัดได้ (optional)
        latencyMs:
          type: integer
          description: เวลาที่ใช้ทั้งหมด (ms)
          example: 8

    # === Intent Definition ===
    IntentDefinition:
      type: object
      properties:
        publicId:
          type: string
          format: uuid
        intentCode:
          type: string
          example: "GET_RFA"
        descriptionTh:
          type: string
          example: "ดึง RFA ตาม filter"
        descriptionEn:
          type: string
          example: "Get RFA by filters"
        category:
          type: string
          enum: [read, suggest, utility]
        isActive:
          type: boolean
        createdAt:
          type: string
          format: date-time
        updatedAt:
          type: string
          format: date-time

    CreateIntentDefinitionRequest:
      type: object
      required: [intentCode, descriptionTh, descriptionEn, category]
      properties:
        intentCode:
          type: string
          pattern: '^[A-Z][A-Z0-9_]*$'
          example: "GET_CONTRACT"
        descriptionTh:
          type: string
          maxLength: 255
        descriptionEn:
          type: string
          maxLength: 255
        category:
          type: string
          enum: [read, suggest, utility]

    UpdateIntentDefinitionRequest:
      type: object
      properties:
        descriptionTh:
          type: string
          maxLength: 255
        descriptionEn:
          type: string
          maxLength: 255
        isActive:
          type: boolean

    # === Intent Pattern ===
    IntentPattern:
      type: object
      properties:
        publicId:
          type: string
          format: uuid
        intentCode:
          type: string
        language:
          type: string
          enum: [th, en, any]
        patternType:
          type: string
          enum: [keyword, regex]
        patternValue:
          type: string
          maxLength: 255
        priority:
          type: integer
          description: ลำดับการตรวจสอบ (ต่ำ = ตรวจก่อน)
        isActive:
          type: boolean
        createdAt:
          type: string
          format: date-time
        updatedAt:
          type: string
          format: date-time

    CreateIntentPatternRequest:
      type: object
      required: [patternType, patternValue]
      properties:
        language:
          type: string
          enum: [th, en, any]
          default: any
        patternType:
          type: string
          enum: [keyword, regex]
        patternValue:
          type: string
          maxLength: 255
        priority:
          type: integer
          default: 100

    UpdateIntentPatternRequest:
      type: object
      properties:
        language:
          type: string
          enum: [th, en, any]
        patternType:
          type: string
          enum: [keyword, regex]
        patternValue:
          type: string
          maxLength: 255
        priority:
          type: integer
        isActive:
          type: boolean