class LedInterface {
public:
  virtual void begin() = 0;
  virtual void toggle() = 0;
  virtual void on() = 0;
  virtual void off() = 0;
};

template <uint8_t Pin> class Led : public LedInterface {
public:
  virtual void begin() { pinMode(Pin, OUTPUT); }
  virtual void toggle() { digitalWrite(Pin, !digitalRead(Pin)); }
  virtual void on() { digitalWrite(Pin, HIGH); }
  virtual void off() { digitalWrite(Pin, LOW); }
};

struct Thresholds {
  int8_t Min;
  int8_t Max;
  LedInterface* Device;
};

Led<4> LedRC;   // Red Cold
Led<5> LedYC;   // Yellow Cold
Led<6> LedOk;   // All Ok
Led<7> LedYW;   // Yellow Warm
Led<8> LedRW;   // Red Warm

Thresholds TempThres[] {
    {-127, 10,  &LedRC},
    {11,   15,  &LedYC},
    {16,   22,  &LedOk},
    {23,   28,  &LedYW},
    {28,   127, &LedRW},
};

void setup() {
  Serial.begin(115200);

  for (auto& L : TempThres) {
    L.Device->begin();
    L.Device->on();
  }

  randomSeed(A0);
}

void loop() {

  int Temperature = random(-10, 55);
  Serial.println(Temperature);

  for (auto& T : TempThres) {
    if (Temperature >= T.Min && Temperature <= T.Max) {
      T.Device->on();
    } else {
      T.Device->off();
    }
  }

  delay(5000);
}