#include "indicator.h"
#include "co2_meter.h"

Indicator::Indicator(IndicatorBlinker * indicator_blinker) {
  blinker = indicator_blinker;
  pinMode(RED_LED_PIN, OUTPUT);
  digitalWrite(RED_LED_PIN, LOW);
  pinMode(GREEN_LED_PIN, OUTPUT);
  digitalWrite(GREEN_LED_PIN, LOW);
}

void Indicator::off() {
  blinker->stop();
}

void Indicator::update(uint16_t value) {
  // Use 50% duty cycle to save power.
  if (value < GREEN_THRESHOLD) { // Full green
    blinker->stop();
    digitalWrite(RED_LED_PIN, LOW);
    analogWrite(GREEN_LED_PIN, 128);
  }
  else if (value < YELLOW_THRESHOLD) { // Blink between green and yellow
    blinker->start();
  }
  else if (value < RED_THRESHOLD) { // Full yellow
    blinker->stop();
    analogWrite(RED_LED_PIN, 58); // Red LED is 10% brighter than green
    analogWrite(GREEN_LED_PIN, 64);
  }
  else { // Full red
    blinker->stop();
    analogWrite(RED_LED_PIN, 116); // Red LED is 10% brighter than green
    digitalWrite(GREEN_LED_PIN, LOW);
  }
}

// vim:ft=arduino