#include <tinyNeoPixel.h>

const int PA4 = 0;
const int PA5 = 1;
const int PA6 = 2;
const int PA7 = 3;
const int PB5 = 4;

const int PB4 = 5;
const int PB1 = 8;
const int PB0 = 9;

const int PA3 = 16;
const int NUM_LEDS=200;

int p1 = 0;
int p2 = 0;
int p3 = 0;
int p4 = 0;
int p5 = 0;

int s1 = 1;
int s2 = 1;
int s3 = 1;

int s3_val = 0;

int delay_time = 500;
int len_leds = 1;

tinyNeoPixel pixels = tinyNeoPixel(NUM_LEDS, PA3, NEO_GRB + NEO_KHZ800);

void setup() {
   pixels.begin();
   pinMode(PA4, INPUT);
   pinMode(PA5, INPUT);
   pinMode(PA6, INPUT);
   pinMode(PA7, INPUT);
   pinMode(PB5, INPUT);

   pinMode(PB4, INPUT);
   pinMode(PB1, INPUT);
   pinMode(PB0, INPUT);
   
   Serial.begin(115200);
}

void loop() {
  p1 = analogRead(PA4);
  Serial.print("p1(color1): ");
  Serial.println(p1);
  
  p2 = analogRead(PA5);
  Serial.print("p2(color2): ");
  Serial.println(p2);
  
  p3 = analogRead(PA6);
  Serial.print("p3(color3): ");
  Serial.println(p3);
  
  p4 = analogRead(PA7);
  Serial.print("p4(color4, leds): ");
  Serial.println(p4);
  
  p5 = analogRead(PB5);
  Serial.print("p5:PB5(delay): ");
  Serial.println(p5);


  s1 = digitalRead(PB4);
  // when pushing switch, count up
  if (s1 < 1 ) {
    delay_time = delay_time + 500;
    if (delay_time > 5000 ) {
      delay_time = 0;
    }
  } 
  Serial.print("s1(+500): ");
  Serial.println(s1);
 
  s2 = digitalRead(PB1);
  if (s2 < 1 ) {
    delay_time = delay_time -500;
    if (delay_time < 0 ) {
      delay_time = 5000;
    }
  }  
  Serial.print("s2(-500): ");
  Serial.println(s2);
  Serial.print("delay_time: ");
  Serial.println(delay_time);

  s3 = digitalRead(PB0);
  if (s3 < 1 ) {
    // toggle switch
    if (s3_val == 1 ) {
      s3_val = 0; 
    } else {
      s3_val = 1;
    }
  }

 
  Serial.print("s3: ");
  Serial.print(s3); 
  Serial.print(",  s3_val(0: single, 1: random): ");
  Serial.println(s3_val);

 
  len_leds = p4/4;
  if (len_leds > NUM_LEDS ) {
    len_leds = NUM_LEDS; 
  }
  Serial.print("len_leds: ");
  Serial.println(len_leds);

  switch (s3_val) {
    case 0:
      for (int i=0; i<len_leds; i++){
        pixels.setPixelColor(i, pixels.Color(p1/4, p2/4, p3/4));
        pixels.show();
        delay(p5/32);
        pixels.setPixelColor(i, pixels.Color(p2/8, p3/8, p4/8));
        pixels.show();
        delay(p5/32);
      }
      break;

    case 1:
      for (int i=0; i<len_leds; i++){
          pixels.setPixelColor(i, pixels.Color(random(0, 256), random(0, 256), random(0, 256)));
          pixels.show();
          delay(p5/32);
          pixels.setPixelColor(i+p5/10, pixels.Color(random(0, 64), random(0, 64), random(0, 64)));
          pixels.show();
          delay(p5/32);
          pixels.setPixelColor(i, pixels.Color(random(0, 64), random(0, 64), random(0, 64)));
          pixels.show();
          delay(p5/32);
      }
      break;
  }
  delay(delay_time);
}