model Device {
  id       String      @id @default(uuid())
  imei     String      @unique
  name     String?
  telemetry Telemetry[]
  @@map("devices")
}

model Telemetry {
  id          String   @id @default(uuid())
  deviceId    String
  device      Device   @relation(fields: [deviceId], references [id])
  recordedAt  DateTime @default(now)
  lat         Float
  lng         Float
  altitude    Float?
  speed       Float?
  heading     Float?
  accuracy    Float?
  battery     Float?
  isCarOn     Boolean?
  raw         Json?
  @@map("telemetry")
}

model Command {
  id         Int      @id @default(autoincrement())
  deviceId   String
  device     Device   @relation(fields: [deviceId], references [id])
  type       String
  payload    Json
  createdAt  DateTime @default(now())
  @@map("commands")
}