openapi: 3.0.3
info:
  title: KosmoConnect API
  description: Draft OpenAPI specification for the KosmoConnect platform.
  version: 0.1.0

paths:
  /api/v1/weather/latest:
    get:
      summary: Get latest readings from all nodes
      parameters:
        - name: node_id
          in: query
          schema:
            type: string
          required: false
          description: Filter by specific node ID
      responses:
        '200':
          description: Latest environmental readings
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/EnviroReading'

  /api/v1/weather/history:
    get:
      summary: Get historical readings for a node
      parameters:
        - name: node_id
          in: query
          required: true
          schema:
            type: string
        - name: start
          in: query
          required: true
          schema:
            type: string
            format: date-time
        - name: end
          in: query
          required: true
          schema:
            type: string
            format: date-time
        - name: interval
          in: query
          required: false
          schema:
            type: string
            enum: [raw, 1h, 1d]
      responses:
        '200':
          description: Historical environmental data
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/EnviroReading'

  /api/v1/messages:
    post:
      summary: Send a message to a mesh node
      security:
        - bearerAuth: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/OutboundMessage'
      responses:
        '202':
          description: Message accepted and queued
        '403':
          description: Subscription does not allow messaging this node
        '429':
          description: Rate limit exceeded

  /api/v1/messages/conversations:
    get:
      summary: Get user's message conversations
      security:
        - bearerAuth: []
      responses:
        '200':
          description: List of conversation summaries
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: array
                    items:
                      type: object
                      properties:
                        node_id:
                          type: string
                        nickname:
                          type: string
                        latest_text:
                          type: string
                        latest_at:
                          type: string
                          format: date-time
                        unread_count:
                          type: integer

  /api/v1/messages/conversations/{node_id}:
    get:
      summary: Get full conversation with a node
      security:
        - bearerAuth: []
      parameters:
        - name: node_id
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Message history
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: array
                    items:
                      type: object
                      properties:
                        id:
                          type: string
                        direction:
                          type: string
                        sender_node_id:
                          type: string
                        target_node_id:
                          type: string
                        text:
                          type: string
                        status:
                          type: string
                        created_at:
                          type: string
                          format: date-time

components:
  schemas:
    EnviroReading:
      type: object
      properties:
        node_id:
          type: string
        timestamp:
          type: string
          format: date-time
        temperature_c:
          type: number
        humidity_percent:
          type: number
        pressure_pa:
          type: number
        wind_speed_ms:
          type: number
        wind_direction:
          type: integer
        pm25_ugm3:
          type: number
        pm10_ugm3:
          type: number
        gas_resistance_kohm:
          type: number

    OutboundMessage:
      type: object
      properties:
        target_node_id:
          type: string
        text:
          type: string
          maxLength: 200
      required:
        - target_node_id
        - text

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