import { verify } from '~/helpers/signature'
import { DeviceQueryParams } from '../schema'
import { queryDeviceStatus } from './query'

export default abstract class QueryService {
  static async getDeviceStatus(query: DeviceQueryParams, headers: Record<string, string | undefined>): Promise<{
    status: 'success'
    message: 'command accepted'
    data: {
      floor: string
      unit: string
      device: string
      room: string
      devType: string
      code: string
      tower: string
      payload: string
    }
  } | null> {
    const apiKey = headers['x-api-key']

    // For now, use apiKey as secretKey since DB validation is skipped
    const secretKey = apiKey

    // Remove signature from query for verification
    const { signature, ...queryWithoutSignature } = query

    const isValid = verify(queryWithoutSignature, signature, secretKey)
    if (!isValid) {
      throw new Error('invalid_signature')
    }

    // TODO: Check nonce for replay attack when DB is implemented

    const topic = `${query.merchantName}/${query.floorName}_${query.unitNumber}-${query.deviceName}-${query.roomName}-${query.deviceType}-${query.commandType}-${query.towerNumber}`

    const deviceData = await queryDeviceStatus(topic)

    if (deviceData) {
      return {
        status: 'success',
        message: 'command accepted',
        data: deviceData,
      }
    }

    return null
  }
}