#include <SoftwareSerial.h>
#include <Adafruit_NeoPixel.h>
#include <Wire.h>

#define PIN        6 // pin for neopixel
#define NUMPIXELS 12 // 
Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
#define DELAYVAL 10
int x = 0;
int Liquid_level = 0;

int step_num = 0;
int delta = 1;
int color[] = {255, 255, 0};

int motorPin = 16; // pin that turns on the motor
int watertime = 60; // how long to water in seconds
int waittime = 1; // how long to wait in seconds

SoftwareSerial Serial1(2, 3);//(Rx_UNO_to_Tx_mp3,Tx_UNO with 1k ohm)

void setup() {
  //i2c
  Wire.begin(8);

  //MP3
  Serial1.begin(9600);
  volume(0x1E);//Volume settings 0x00-0x1E

  //Neopixels

  //Motor
  pinMode(motorPin, OUTPUT); // set 16 to an output so we can use it to turn on the transistor
  pinMode(LED_BUILTIN, OUTPUT);

  Wire.onReceive(receiveEvent);
  Wire.onRequest(requestEvent);
}

void receiveEvent(int bytes) { // Interrupt Service Routine 割り込み
  x = Wire.read(); // read e from Master
  Serial.print("received -------------" ); Serial.println((char)x);// "1" is ASCII code 49
  Liquid_level = 0;//empty
}


void requestEvent() { //ISR 割り込み
  Serial.println("REQUESTEvent");
  if (Liquid_level == 1) {
    Wire.write("1", strlen("1"));
    Serial.print("sent Liquid_level = "); Serial.println(Liquid_level);
  } else
    Wire.write("0", strlen("0"));
}


void loop() {

  Serial.println("Loop");


  //mp3
  if (x == '2') {
    Serial.println("play dozodozo");
    play(0x01);//Play the specified audio:0x01-file0001//en
    //Serial1.write(order,4);//order play
    delay(2000);
    x = '0';
  }

  if (x == '3') {
    Serial.println("play dozodozo");
    play(0x04);//Play the specified audio:0x01-file0001//jp
    //Serial1.write(order,4);//order play
    delay(2000);
    x = '0';
  }

  if (x == '4') {
    Serial.println("play dozodozo");
    play(0x03);//Play the specified audio:0x01-file0001//fr
    //Serial1.write(order,4);//order play
    delay(2000);
    x = '0';
  }

  if (x == '1') {
    Serial.println("MOTOR ON");
    pixels.begin();

    for (int i = 0; i < pixels.numPixels(); i++) {
      // ストリップの長さに沿って色相環（65536の範囲）を1回転させる量だけピクセルの色相をオフセットします。
      int pixelHue = step_num + (i * 65536L / pixels.numPixels());
      // ColorHSV関数に色相(0 to 65535)を渡し、その結果をgamma32()でガンマ補正します。
      pixels.setPixelColor(i, pixels.gamma32(pixels.ColorHSV(pixelHue)));
    }
    pixels.show();
    step_num += 256;
    if (step_num == 65536) {
      step_num = 0;
    }
    Serial.println("play spring ocean");
    play(0x02);//Play the specified audio:0x01-file0001//au[
    //Serial1.write(order,4);//order play
    delay(2000);

    //Motor
    digitalWrite(motorPin, HIGH); // turn on the motor
    digitalWrite(LED_BUILTIN, HIGH); // turn on the LED
    delay(watertime * 1000);      // 10seconds
    digitalWrite(motorPin, LOW);  // turn off the motor
    digitalWrite(LED_BUILTIN, LOW);  // turn off the LED
    delay(waittime * 1000);      // 1 second

    /*Liquid_level = 1;//full
    Serial.print("Motor OFF: Liquid_level ="); Serial.println(Liquid_level);
    x = '0';*/

  }//if
  delay(500);

  /*if (x == '9') {
    Serial.println("MOTOR OFF");
    digitalWrite(motorPin, LOW);  // turn off the motor
    digitalWrite(LED_BUILTIN, LOW);  // turn off the LED
    delay(waittime * 1000);      // multiply by 1000 to translate seconds to milliseconds
  }*/

  }


  void play(unsigned char Track)
  {
    unsigned char play[6] = {0xAA, 0x07, 0x02, 0x00, Track, Track + 0xB3};
    Serial1.write(play, 6);//(buf, len)
  }

  void volume( unsigned char vol)
  {
    unsigned char volume[5] = {0xAA, 0x13, 0x01, vol, vol + 0xBE};
    Serial1.write(volume, 5);
  }