/*
arduino aircraft lighting update 1
contains various bits that were ripped from strandtest, forum.arduino.cc, arduino IDE
examples, and others, then heavily cut down and commented to the best of my ability.

modify this to suit your needs, it's working fine for me now.

 -floz
*/

#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
#include <avr/power.h>
#endif

//data-pin for the neopixels (output)
#define PIN 6

//channel on your hobby receiver connects to this digital pin (input)
#define PWM_SOURCE 5

//how long between strobe flashes/battery checks
const long interval = 5050;
//timer var
unsigned long previousMillis = 0;

//el togglodyte supremo!
int LightState = 1;
int LastLightState = 0;

//magic sauce for neopixel/ws2812b
//check strandtest or other examples for further info
//you can instantiate multiples for all kinds of effects
Adafruit_NeoPixel leds = Adafruit_NeoPixel(2, PIN, NEO_GRB + NEO_KHZ400);


void setup()
{

    leds.begin(); // init the instance
    leds.show(); // Initialize all pixels to 'off'
    Serial.begin(9600); // start serial output
}
void nav_lights(){
  //red/green FAA style
    leds.setPixelColor(0, 0,255,0);
    leds.setPixelColor(1,255,0,0);
    leds.show();

}
void landing_lights(){
  //bright warm white
      leds.setPixelColor(0, 255,255,196);
      leds.setPixelColor(1, 255,255,196);
      leds.show();
}
void battery_timer(){
   //after x minutes (default 10) give the pilot a friendly warning flash
   //and refuse to exit this mode until reset/powered down
      leds.setPixelColor(0, 255,255,0);
      leds.setPixelColor(1, 0,0,0);
      leds.show();
      delay(150);
      leds.setPixelColor(1, 255,255,0);
      leds.setPixelColor(0, 0,0,0);
      leds.show();
      delay(150);
      LightState = 3;
 }

void strobe(){
  // added strobe thingie
      leds.setPixelColor(0, 255,255,255);
      leds.setPixelColor(1, 255,255,255);
      leds.show();
      delay(60);
      LightState = LastLightState;
      return;
}
void strobe_loop(){
  // rapid wingtip flashes of white/off
      leds.setPixelColor(0, 255,255,255);
      leds.setPixelColor(1, 255,255,255);
      leds.show();
      delay(100);
      leds.setPixelColor(0, 0,0,0);
      leds.setPixelColor(1, 0,0,0);
      leds.show();
      delay(100);
}
void loop() {
//cleaned it up some, using switch/case now

    if (LightState == 0){
      nav_lights();
    }
    if (LightState == 1){
      landing_lights();
    }
    if (LightState == 2){
      strobe_loop();
    }
    if (LightState ==3){
      battery_timer();
    }
    /*
    if (LightState ==4){ //add extra functions like this.
      strobe_loop();
    }
    */

 unsigned long currentMillis = millis();
   //someone else's work, from blinkwithoutdelay example.
  if (currentMillis - previousMillis >= interval) {
   // this huge number (600000) is ten minutes in milliseconds
    // ( min * 60 ) * 1000 = ms
    // i adjusted to 6 minutes while learning to fly
  if (millis() >= 480000){
        battery_timer();
        return;     //ymmv, comment out?
     }
    previousMillis = currentMillis;

     if (LightState != 0){ //strobe check
      //if we're not using nav lights, don't bother
      return;
     }
     LastLightState = LightState; //var to return to nav lights after strobe
       strobe(); //give us a quick flash
     }

     int pwmin = pulseIn(PWM_SOURCE, HIGH, 20000); //read the PWM line (default pin 5)


     //map the value to however many choices you want to have
     int selection = map(pwmin, 1000,1900,0,2);
     Serial.print("PWM: ");
     Serial.print(pwmin);

     if (LightState == 0){
      Serial.print(" nav lights ");
     }

     if (LightState == 1){
      Serial.print(" landing lights ");
     }

     if (LightState == 2){
      Serial.print(" strobe lights ");
     }
     Serial.print(" time: ");
     Serial.println(millis());

     switch (selection) {  //what mode are we in according to pwm?
     case 0:
     LightState = 0; //nav lights
     break;
     case 1:
     LightState = 1; //landing lights
     break;
     case 2:
     LightState = 2; // strobes
     break;
     /*
     case 3:                                          //add extra functions this way
     LightState = 3; //battery warning flash test
     Serial.println("battery strobe test");
     break;
     case 4:
     LightState = 4;
     Serial.println("state #4");
     break;
     */
     }
     //Serial.print("time: ");
     //Serial.println(millis());
     //delay(100); //purely for debugging otherwise the console is spammmmmm
   }