#include <Servo.h>
#include "notebook.h";
#include "themes.h";

const int input1OfTheDCMotor = 9;
const int input2OfTheDCMotor = 10;
const int pwmInputOfTheDCMotor = 6;
const int buttonToStartStopTheDcMotor = 2;
const int buttonToShowToChangeTheDirectionOfTheDCMotor = 3;
const int greenLed = 12;
const int redLed = 8;
const int tempSensor = A0;
const int servoPin = 11;
Servo servo;


volatile byte stateOfTheButtonToStartStopTheDCMotor = LOW;
bool isRunning = LOW;
bool changeDirection = LOW;
bool isEngineSoundsPlaying = HIGH;

void setup() {
  //Leds setup
  pinMode(greenLed, OUTPUT);
  pinMode(redLed, OUTPUT);
  digitalWrite(redLed, HIGH);
  //buttons
  pinMode(buttonToStartStopTheDcMotor, INPUT);
  pinMode(buttonToShowToChangeTheDirectionOfTheDCMotor, INPUT);
  //DC motor
  pinMode(input1OfTheDCMotor, OUTPUT);
  pinMode(input2OfTheDCMotor, OUTPUT);
  digitalWrite(input1OfTheDCMotor, LOW);
  digitalWrite(input2OfTheDCMotor, HIGH);
  //pwm signal
  pinMode(pwmInputOfTheDCMotor, OUTPUT);
  //Servo
  servo.attach(servoPin);
  //interrupts
  attachInterrupt(digitalPinToInterrupt(buttonToStartStopTheDcMotor), readTheChangeToStartStop, RISING );
  attachInterrupt(digitalPinToInterrupt(buttonToShowToChangeTheDirectionOfTheDCMotor), readTheChangeToChangeDirection, RISING );
}

void loop() {
  int valueOfTheSensor = analogRead(tempSensor);
  float voltage = (valueOfTheSensor / 1024.0) * 5.0;
  float temp = (voltage -0.5) * 100;
  if (temp >= 20.00)
    isRunning = LOW;
  }
  changeTheStateOfTheLights(isRunning);
  startTheDCMotorAndStopIt(isRunning);
  changeTheDirectionOfTheDCMotor(changeDirection);
}

void readTheChangeToStartStop () {
  isRunning  = !isRunning;
  changeTheStatusOfTheEnginePlaying();
}

void readTheChangeToChangeDirection () {
  changeDirection = !changeDirection;
}

void changeTheStatusOfTheEnginePlaying (){
  if (isRunning == HIGH){
    isEngineSoundsPlaying = HIGH;
  } else {
    isEngineSoundsPlaying = LOW;
  }
}

void changeTheStateOfTheLights(bool stateOfLight) {
  digitalWrite(greenLed, stateOfLight);
  digitalWrite(redLed, !stateOfLight);
}

void startTheDCMotorAndStopIt(bool isRunning){
  if (isRunning == HIGH) {
    digitalWrite(pwmInputOfTheDCMotor, HIGH);
    playCarMusicStart();
    changeToNeutral();
  } else {
    digitalWrite(pwmInputOfTheDCMotor, LOW);
    changeToRedLight();
  }
}

void changeTheDirectionOfTheDCMotor(bool changeDirection) {
  digitalWrite(input1OfTheDCMotor, changeDirection);
  digitalWrite(input2OfTheDCMotor, !changeDirection);
}

void changeToRedLight() {
  servo.write(0);
  delay(15);
}

void changeToNeutral() {
  servo.write(40);
  delay(15);
}

void playCarMusicStart(){
  if (isEngineSoundsPlaying == HIGH) {
    for (int thisNote = 0; thisNote < (sizeof(carSounds_note)/sizeof(int)); thisNote++) {
      int noteDuration = 1000 / carsounds_duration[thisNote];
      tone(4, carSounds_note[thisNote], noteDuration);
      int pauseBetweenNotes = noteDuration * 2.70;
      delay(pauseBetweenNotes);
      noTone(4);
      isEngineSoundsPlaying = LOW;
    }
  }
}