/*
 Name:		CarInterface.ino
 Created:	3/17/2021 4:15:11 PM
 Author:	Scott Marley
 
 Code and schematic demonstrating how to interface an Arduino with 12V signals
 from a vehicle. This code is for educational purposes only, and should not be
 used on public roads unless you know it is legal where you live.
*/

#include <FastLED.h>

#define NUM_LEDS1		  18
#define NUM_LEDS2		  18
#define NUM_LEDS3		  12
#define NUM_LEDS4		  12
#define INDICATOR_MS      30
#define BRIGHTNESS        200

// Connections to the 12V signals from vehicle
#define ALARM_INPUT				6
#define LIGHT_INPUT       5
#define BRAKE_INPUT			  4
#define L_INDICATOR_INPUT	3
#define R_INDICATOR_INPUT	2

// Connections to the LED strips
#define L_BRAKE_LED_PIN		  12
#define R_BRAKE_LED_PIN		  9
#define L_INDICATOR_LED_PIN	11
#define R_INDICATOR_LED_PIN	10

// LED arrays for the lights
CRGB l_brake_leds[NUM_LEDS1];
CRGB r_brake_leds[NUM_LEDS2];
CRGB l_indicator_leds[NUM_LEDS3];
CRGB r_indicator_leds[NUM_LEDS4];

// Used for indicator animation
uint8_t indicatorLEDsLit = 0;

void setup() {
	FastLED.addLeds<WS2812B, L_BRAKE_LED_PIN, GRB>(l_brake_leds, NUM_LEDS1).setCorrection(TypicalLEDStrip);
	FastLED.addLeds<WS2812B, R_BRAKE_LED_PIN, GRB>(r_brake_leds, NUM_LEDS2).setCorrection(TypicalLEDStrip);
	FastLED.addLeds<WS2812B, L_INDICATOR_LED_PIN, GRB>(l_indicator_leds, NUM_LEDS3).setCorrection(TypicalLEDStrip);
	FastLED.addLeds<WS2812B, R_INDICATOR_LED_PIN, GRB>(r_indicator_leds, NUM_LEDS4).setCorrection(TypicalLEDStrip);
	FastLED.setBrightness(BRIGHTNESS);

	pinMode(BRAKE_INPUT, INPUT);
	pinMode(L_INDICATOR_INPUT, INPUT);
	pinMode(R_INDICATOR_INPUT, INPUT);
	pinMode(LIGHT_INPUT, INPUT);
	pinMode(ALARM_INPUT, INPUT);
}

void loop() {

	// Read the state of the inputs
	bool brakeInput = digitalRead(BRAKE_INPUT);
	bool LIndicatorInput = digitalRead(L_INDICATOR_INPUT);
	bool RIndicatorInput = digitalRead(R_INDICATOR_INPUT);
	bool LightInput = digitalRead(LIGHT_INPUT);
	bool AlarmInput = digitalRead(ALARM_INPUT);

	// Brake lights
	if (brakeInput) {
		fill_solid(l_brake_leds, NUM_LEDS1, CRGB::Red);
		fill_solid(r_brake_leds, NUM_LEDS2, CRGB::Red);
	}
	else {
		fill_solid(l_brake_leds, NUM_LEDS1, CRGB::Black);
		fill_solid(r_brake_leds, NUM_LEDS2, CRGB::Black);
	}

	// Brake lights
	if (LightInput) {
		fill_solid(l_brake_leds, NUM_LEDS1, CRGB::Red);
		fill_solid(r_brake_leds, NUM_LEDS2, CRGB::Red);
	}
	else {
		fill_solid(l_brake_leds, NUM_LEDS1, CRGB::DarkRed);
		fill_solid(r_brake_leds, NUM_LEDS2, CRGB::DarkRed);
	}
	// Indicators
	if (LIndicatorInput && !RIndicatorInput) {
	//	indicatorAnimation(l_indicator_leds);
	l_indicator_leds[5] = CRGB::CRGB::Orange;
	l_indicator_leds[6] = CRGB::CRGB::Orange;
	  FastLED.show();
    delay(70);
	l_indicator_leds[4] = CRGB::CRGB::Orange;
  l_indicator_leds[7] = CRGB::CRGB::Orange;
		FastLED.show();
    delay(70);
	l_indicator_leds[3] = CRGB::CRGB::Orange;
	l_indicator_leds[8] = CRGB::CRGB::Orange;
		FastLED.show();
   delay(70);
	l_indicator_leds[2] = CRGB::CRGB::Orange;
	l_indicator_leds[9] = CRGB::CRGB::Orange;
		FastLED.show();
    delay(70);
	l_indicator_leds[1] = CRGB::CRGB::Orange;
	l_indicator_leds[10] = CRGB::CRGB::Orange;
		FastLED.show();
    delay(70);	
	l_indicator_leds[0] = CRGB::CRGB::Orange;
	l_indicator_leds[11] = CRGB::CRGB::Orange;
		FastLED.show();
    delay(70);
	l_indicator_leds[5] = CRGB::CRGB::Black;
	l_indicator_leds[6] = CRGB::CRGB::Black;
	  FastLED.show();
    delay(70);
	l_indicator_leds[4] = CRGB::CRGB::Black;
  l_indicator_leds[7] = CRGB::CRGB::Black;
		FastLED.show();
    delay(70);
	l_indicator_leds[3] = CRGB::CRGB::Black;
	l_indicator_leds[8] = CRGB::CRGB::Black;
		FastLED.show();
   delay(70);
	l_indicator_leds[2] = CRGB::CRGB::Black;
	l_indicator_leds[9] = CRGB::CRGB::Black;
		FastLED.show();
    delay(70);
	l_indicator_leds[1] = CRGB::CRGB::Black;
	l_indicator_leds[10] = CRGB::CRGB::Black;
		FastLED.show();
    delay(70);	
	l_indicator_leds[0] = CRGB::CRGB::Black;
	l_indicator_leds[11] = CRGB::CRGB::Black;
		FastLED.show();
    delay(70);

	}
	
	else if (RIndicatorInput && !LIndicatorInput) {
	//	indicatorAnimation(r_indicator_leds);
	r_indicator_leds[5] = CRGB::CRGB::Orange;
	r_indicator_leds[6] = CRGB::CRGB::Orange;
	  FastLED.show();
    delay(70);
	r_indicator_leds[4] = CRGB::CRGB::Orange;
  r_indicator_leds[7] = CRGB::CRGB::Orange;
		FastLED.show();
    delay(70);
	r_indicator_leds[3] = CRGB::CRGB::Orange;
	r_indicator_leds[8] = CRGB::CRGB::Orange;
		FastLED.show();
   delay(70);
	r_indicator_leds[2] = CRGB::CRGB::Orange;
	r_indicator_leds[9] = CRGB::CRGB::Orange;
		FastLED.show();
    delay(70);
	r_indicator_leds[1] = CRGB::CRGB::Orange;
	r_indicator_leds[10] = CRGB::CRGB::Orange;
		FastLED.show();
    delay(70);	
	r_indicator_leds[0] = CRGB::CRGB::Orange;
	r_indicator_leds[11] = CRGB::CRGB::Orange;
		FastLED.show();
    delay(70);
	r_indicator_leds[5] = CRGB::CRGB::Black;
	r_indicator_leds[6] = CRGB::CRGB::Black;
	  FastLED.show();
    delay(70);
	r_indicator_leds[4] = CRGB::CRGB::Black;
  r_indicator_leds[7] = CRGB::CRGB::Black;
		FastLED.show();
    delay(70);
	r_indicator_leds[3] = CRGB::CRGB::Black;
	r_indicator_leds[8] = CRGB::CRGB::Black;
		FastLED.show();
   delay(70);
	r_indicator_leds[2] = CRGB::CRGB::Black;
	r_indicator_leds[9] = CRGB::CRGB::Black;
		FastLED.show();
    delay(70);
	r_indicator_leds[1] = CRGB::CRGB::Black;
	r_indicator_leds[10] = CRGB::CRGB::Black;
		FastLED.show();
    delay(70);	
	r_indicator_leds[0] = CRGB::CRGB::Black;
	r_indicator_leds[11] = CRGB::CRGB::Black;
		FastLED.show();
    delay(70);
	}
	// Alarmlichten
	if (AlarmInput) {

	l_indicator_leds[5] = CRGB::CRGB::Orange;
	l_indicator_leds[6] = CRGB::CRGB::Orange;
	r_indicator_leds[5] = CRGB::CRGB::Orange;
	r_indicator_leds[6] = CRGB::CRGB::Orange;
	  FastLED.show();
    delay(100);
	l_indicator_leds[4] = CRGB::CRGB::Orange;
  	l_indicator_leds[7] = CRGB::CRGB::Orange;
	r_indicator_leds[4] = CRGB::CRGB::Orange;
      r_indicator_leds[7] = CRGB::CRGB::Orange;
	  FastLED.show();
    delay(100);
	l_indicator_leds[3] = CRGB::CRGB::Orange;
	l_indicator_leds[8] = CRGB::CRGB::Orange;
      r_indicator_leds[3] = CRGB::CRGB::Orange;
	r_indicator_leds[8] = CRGB::CRGB::Orange;
		FastLED.show();
   delay(100);
	l_indicator_leds[2] = CRGB::CRGB::Orange;
	l_indicator_leds[9] = CRGB::CRGB::Orange;
	r_indicator_leds[2] = CRGB::CRGB::Orange;
	r_indicator_leds[9] = CRGB::CRGB::Orange;
		FastLED.show();
    delay(100);
	l_indicator_leds[1] = CRGB::CRGB::Orange;
	l_indicator_leds[10] = CRGB::CRGB::Orange;
	r_indicator_leds[1] = CRGB::CRGB::Orange;
	r_indicator_leds[10] = CRGB::CRGB::Orange;
		FastLED.show();
    delay(100);	
	l_indicator_leds[0] = CRGB::CRGB::Orange;
	l_indicator_leds[11] = CRGB::CRGB::Orange;
	r_indicator_leds[0] = CRGB::CRGB::Orange;
	r_indicator_leds[11] = CRGB::CRGB::Orange;
		FastLED.show();
    delay(100);
	l_indicator_leds[5] = CRGB::CRGB::Black;
	l_indicator_leds[6] = CRGB::CRGB::Black;
	r_indicator_leds[5] = CRGB::CRGB::Black;
	r_indicator_leds[6] = CRGB::CRGB::Black;
	  FastLED.show();
    delay(100);
	l_indicator_leds[4] = CRGB::CRGB::Black;
      l_indicator_leds[7] = CRGB::CRGB::Black;
	r_indicator_leds[4] = CRGB::CRGB::Black;
      r_indicator_leds[7] = CRGB::CRGB::Black;
		FastLED.show();
    delay(100);
	l_indicator_leds[3] = CRGB::CRGB::Black;
	l_indicator_leds[8] = CRGB::CRGB::Black;
	r_indicator_leds[3] = CRGB::CRGB::Black;
	r_indicator_leds[8] = CRGB::CRGB::Black;
		FastLED.show();
   delay(100);
	l_indicator_leds[2] = CRGB::CRGB::Black;
	l_indicator_leds[9] = CRGB::CRGB::Black;
	r_indicator_leds[2] = CRGB::CRGB::Black;
	r_indicator_leds[9] = CRGB::CRGB::Black;
		FastLED.show();
    delay(100);
	l_indicator_leds[1] = CRGB::CRGB::Black;
	l_indicator_leds[10] = CRGB::CRGB::Black;
	r_indicator_leds[1] = CRGB::CRGB::Black;
	r_indicator_leds[10] = CRGB::CRGB::Black;
		FastLED.show();
    delay(100);	
	l_indicator_leds[0] = CRGB::CRGB::Black;
	l_indicator_leds[11] = CRGB::CRGB::Black;
	r_indicator_leds[0] = CRGB::CRGB::Black;
	r_indicator_leds[11] = CRGB::CRGB::Black;
		FastLED.show();
    delay(100);
}
	// Hazards
	else if (LIndicatorInput && RIndicatorInput) {
		fill_solid(l_indicator_leds, NUM_LEDS3, CRGB::Orange);
		fill_solid(r_indicator_leds, NUM_LEDS4, CRGB::Orange);
	}
	
	else {
		fill_solid(l_indicator_leds, NUM_LEDS3, CRGB::Black);
		fill_solid(r_indicator_leds, NUM_LEDS4, CRGB::Black);
		indicatorLEDsLit = 0;
	}



	FastLED.show();
}

void indicatorAnimation(CRGB *leds) {
	for (int i = 0; i < indicatorLEDsLit; i++) {
		leds[i] = CRGB::Orange;
	}
	
	EVERY_N_MILLISECONDS(INDICATOR_MS) {
		indicatorLEDsLit++;
		if (indicatorLEDsLit > NUM_LEDS3) indicatorLEDsLit = NUM_LEDS3;
	}
}