#include <Homie.h>

const int DEFAULT_TEMPERATURE_INTERVAL = 300;

const int DEFAULT_SLEEP_TIME = 600;
const long DEFAULT_WEIGHT_OFFSET = 154231; // Load cell zero offset. 
const float DEFAULT_KILOGRAM_DIVIDER = 21.76;  // Load cell value per kilogram.
const float DEFAULT_VCC_ADJUST = 0.13;

unsigned long lastTemperatureSent = 0;

HomieNode temperatureNode("temperature", "temperature");

HomieSetting<long> temperatureIntervalSetting("temperatureInterval", "The temperature interval in seconds");
HomieSetting<long> sleepTimeSetting("sleepTime", "SleepTime in seconds (max. 3600s!), default is 60s");
HomieSetting<long> weightOffsetSetting("weightOffset", "Offset value to zero. Use BeeScale-Calibration.ino to determine.");
HomieSetting<double> kilogramDividerSetting("kilogramDivider", "Scale value per kilogram. Use BeeScale-Calibration.ino to determine.");
HomieSetting<double> vccAdjustSetting("vccAdjust", "Calibration value for input voltage. See sketch for details.");

void setupHandler() {
  temperatureNode.setProperty("unit").send("c");
}

void loopHandler() {
  if (millis() - lastTemperatureSent >= temperatureIntervalSetting.get() * 1000UL || lastTemperatureSent == 0) {
    float temperature = 22; // Fake temperature here, for the example
    Homie.getLogger() << "Temperature: " << temperature << " °C" << endl;
    temperatureNode.setProperty("degrees").send(String(temperature));
    lastTemperatureSent = millis();

    Homie.getLogger() << "Adj: " << vccAdjustSetting.get() << endl;
    Homie.getLogger() << "Div: " << kilogramDividerSetting.get() << endl;
    Homie.getLogger() << "Off: " << weightOffsetSetting.get() << endl;
    Homie.getLogger() << "Sleep: " << sleepTimeSetting.get() << endl;
  }
}

void setup() {
  Serial.begin(115200);
  Serial << endl << endl;
  
  Homie_setFirmware("temperature-setting", "1.0.0");
  Homie.setSetupFunction(setupHandler).setLoopFunction(loopHandler);

  temperatureNode.advertise("unit");
  temperatureNode.advertise("degrees");

  temperatureIntervalSetting.setDefaultValue(DEFAULT_TEMPERATURE_INTERVAL).setValidator([] (long candidate) {
    return candidate > 0;
  });

  sleepTimeSetting.setDefaultValue(DEFAULT_SLEEP_TIME);
  weightOffsetSetting.setDefaultValue(DEFAULT_WEIGHT_OFFSET);
  kilogramDividerSetting.setDefaultValue(DEFAULT_KILOGRAM_DIVIDER);
  vccAdjustSetting.setDefaultValue(DEFAULT_VCC_ADJUST);

  Homie.disableLedFeedback(); // collides with Serial on ESP07
  Homie.setup();
}

void loop() {
  Homie.loop();
}