package draginoLmds200

import (
  "fmt"
  "encoding/json"
  "udi/database"
)

/*
    "decoded_payload": {
      "Bat": 3.082,
      "DALARM_count": 0,
      "Distance_alarm": 0,
      "Interrupt_alarm": 0,
      "dis1": 105,
      "dis2": 201
    },
*/
type message struct {
  Bat float32 `json:"Bat"`
  DALARM_count int `json:"DALARM_count"`
  Distance_alarm int `json:"Distance_alarm"`
  Interrupt_alarm int `json:"Interrupt_alarm"`
  Dis1 int `json:"dis1"`
  Dis2 int `json:"dis2"`
}

func Parse(fPort int, decodedPayload []byte, variables *map[string]database.VariableType) error {
  if fPort != 2 {
    return fmt.Errorf("Unexpected fPort %d", fPort)
  }
  var message message
  err := json.Unmarshal(decodedPayload, &message)
  if err != nil {
    return fmt.Errorf("Unable to parse payload, fPort %d, error %s", fPort, err)
  }
  (*variables)["Battery"] = database.VariableType {
    Label: "Battery",
    Variable: "Voltage",
    Unit: "V",
    Value: message.Bat,
  }
  (*variables)["Distance1"] = database.VariableType {
    Label: "Distance1",
    Variable: "Level",
    Unit: "mm",
    Value: (message.Dis1 * 10),
  }
  (*variables)["Distance2"] = database.VariableType {
    Label: "Distance2",
    Variable: "Level",
    Unit: "mm",
    Value: (message.Dis2 * 10),
  }
  return nil
}