#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=144;

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 = 1;

int delay_time = 1000;
int led_i = 1;
int len_leds[] = {0, 18, 36, 72, 144};
int len_leds_line = 0;
int blink_interval = 20;
// int bright = 128;

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(len_led_line): ");
  Serial.println(p4);
  
  p5 = analogRead(PB5);
  Serial.print("p5(blink_interval): ");
  Serial.println(p5);
  
  s1 = digitalRead(PB4);
  // when pushing switch, count up
  if (s1 < 1 ) {
    led_i = led_i + 1;
    if (led_i > 5 ) {
      led_i = 0;
    }
  } 
  Serial.print("s1(button): ");
  Serial.println(s1);
 
  s2 = digitalRead(PB1);
  if (s2 < 1 ) {
    led_i = led_i - 1;
    if (len_leds < 0 ) {
      led_i = 5;
      return;
    }
    pixels.clear();
    pixels.show();
  }  
  Serial.print("s2(button): ");
  Serial.println(s2);
  Serial.print("len_leds: ");
  Serial.println(len_leds[led_i]);

  s3 = digitalRead(PB0);
  if (s3 < 1 ) {
    // toggle switch
    if (s3_val == 0 ) {
      s3_val = 1; 
    } else if (s3_val==1) {
      s3_val = 2;
    } else if (s3_val==2) {
      s3_val = 0;
    }
  }
  Serial.print("s3: ");
  Serial.print(s3); 
  Serial.print(",  s3_val(0: single, 1: random, 2: clear): ");
  Serial.println(s3_val);

  len_leds_line = p4/32;
  Serial.print("len_leds_line: ");
  Serial.println(len_leds_line);

  blink_interval = p5/32;
  Serial.print("blink_interval: ");
  Serial.println(blink_interval);

  switch (s3_val) {
    case 0:
      for (int i=0; i<len_leds[led_i]; i++){
//        pixels.setPixelColor(i, pixels.Color(p1/4, p2/4, p3/4));
        pixels.setPixelColor(i, pixels.Color(255, 255, 255));
        pixels.show();
        delay(blink_interval);
      }
      break;

    case 1:
      for (int i=0; i<len_leds[led_i]; i++){
        pixels.setPixelColor(i+len_leds_line, pixels.Color(random(0, 256), random(0, 256), random(0, 256)));
        pixels.show();
        delay(blink_interval);
      }
      break;
    case 2:
      pixels.clear();
      pixels.show();
      // wait for pushing time the switch
      delay(1000);
      break;
  }
  delay(delay_time);
}