/*program runs a reaction test
*/
#define POT1 0
#define BUTTON1 10
#define BUTTON2 11
#define LED1 5
#define BUZZER 3                      //refers to what digital pin these items are connected to
#define LATCH 7
#define CLOCK 8
#define DATA 4
#include <EEPROM.h>


const byte three = B10110000;
const byte four = B10011001;
const byte five= B10010010;           //declares the binary of these numbers
const byte six = B10000010;
const byte seven = B11111000;
const byte eight =B10000000;
const byte nine = B10010000;

  int i;
  int goes;
  int randomnum;
  float reactiontime;
  float startTime;                   //these are declared variables that will be used in the program
  float stopTime;
  float average;
  float total;
  float num;
  float bestaveragesession;
  int bestaverage;
  word savebest;
  word best_L;
  word best_H;

  void setup()
  {
    Serial.begin(9600);
    pinMode(BUTTON1, INPUT);
    pinMode(BUTTON2, INPUT);
    pinMode(LED1, OUTPUT);               //initializes the digital pins to either input or output
    pinMode(LATCH, OUTPUT);
    pinMode(CLOCK, OUTPUT);
    pinMode(DATA, OUTPUT);
    pinMode(POT1, INPUT);
    pinMode(BUZZER, OUTPUT);

  }
  void loop()
  {
   savebest = word(EEPROM.read(1),EEPROM.read(0));
   bestaverage = int(savebest);
   goes = selectgoes();            //calls function that lets the user choose the amount of goes they would like
   i = 0;
   total = 0;                        //resets the variables to these numbers
   while (i < goes)            //until the desired number of goes is reached
   {

     reactiontime = reactiontimer();//calls the reaction timer
     Serial.print("Your reaction time is: ");
     Serial.print(reactiontime );          //prints out the reaction time
      Serial.print(" milliseconds");
     Serial.println();
    total = total + reactiontime;          //works out the total
     i = i + 1;                          //adds one onto i
   }

  average = total / goes;            //works out average time
    tone(BUZZER,1000, 500);
    delay(500);
    tone(BUZZER,2000, 500);                    //series of beeps to tell the user they are done
    delay(500);
    tone(BUZZER,3000, 500);
    Serial.print("Your total reaction times were: ");            //prints the total
    Serial.print(total);
     Serial.print(" milliseconds");
    Serial.println();
    Serial.print("Your average reaction time is: ");              //prints the average
    Serial.print(average);
     Serial.print(" milliseconds");
    Serial.println();
    if (average < bestaveragesession || bestaveragesession == 0 )
    {
       bestaveragesession = average;        //works out if the new average is better than the current best in the session
    }

      if (average <  bestaverage || bestaverage == 0 || bestaverage == 0.00)
      {
          bestaverage = int(average);
          savebest = word(bestaverage);
          best_L = lowByte(savebest);
          best_H = highByte(savebest);
          EEPROM.write(0,best_L);
          EEPROM.write(1,best_H);
      }

    savebest = word(EEPROM.read(1),EEPROM.read(0));
    bestaverage = int(savebest);
    Serial.print("The best average reaction time this session is: ");
    Serial.print(bestaveragesession);    //prints out the best average
     Serial.print(" milliseconds");
    Serial.println();
    Serial.print("The best average reaction time ever is: ");
    Serial.print(bestaverage);      //prints out the best ever
    Serial.print(" milliseconds");
    Serial.println();
    Serial.println();

  }

  float reactiontimer()
  {
    randomnum = random(3000,7000);    //picks a random number from 3 to 7
    delay(randomnum);      //delays for the period of the random number
    startTime = millis();      //declares when the start time is in milliseconds
    while (digitalRead(BUTTON1) == HIGH)    //until the button is pressed the light will stay on
    {
    digitalWrite(LED1, HIGH);
    }
    digitalWrite(LED1, LOW);// the lkight will switch off when the button is pressed
    stopTime = millis();//declares the end time in milliseconds
    reactiontime = stopTime - startTime; //calculates time between
   // reactiontime = reactiontime/1000;// converts milliseconds to seconds

    return reactiontime;//returns the reaction time
  }
  float selectgoes()
 {
   while (digitalRead(BUTTON2) == HIGH) //loops round until the button is pressed
   {
    if (analogRead(POT1) < 146) // if the frequency of the potentiometer is in the fields shown then it will perform the next tasks
    {
          digitalWrite(LATCH, LOW);
          shiftOut(DATA, CLOCK, MSBFIRST, three);//changes the 7 segment display to show a 3
          digitalWrite(LATCH,HIGH);
          goes = 3;
    }

       if (analogRead(POT1) > 146 && analogRead(POT1) < 293)
    {
          digitalWrite(LATCH, LOW);
          shiftOut(DATA, CLOCK, MSBFIRST, four);//changes the 7 segment display to show a 4
          digitalWrite(LATCH,HIGH);
          goes = 4;
    }
       if (analogRead(POT1) > 293 && analogRead(POT1) < 438)
    {
          digitalWrite(LATCH, LOW);
          shiftOut(DATA, CLOCK, MSBFIRST, five);//changes the 7 segment display to show a 5
          digitalWrite(LATCH,HIGH);
          goes = 5;
    }
        if (analogRead(POT1) > 438 && analogRead(POT1) < 584)
    {
          digitalWrite(LATCH, LOW);
          shiftOut(DATA, CLOCK, MSBFIRST, six);//changes the 7 segment display to show a 6
          digitalWrite(LATCH,HIGH);
          goes = 6;
    }
         if (analogRead(POT1) > 584 && analogRead(POT1) < 730)
    {
          digitalWrite(LATCH, LOW);
          shiftOut(DATA, CLOCK, MSBFIRST, seven);//changes the 7 segment display to show a 7
          digitalWrite(LATCH,HIGH);
          goes = 7;
    }
         if (analogRead(POT1) > 730 && analogRead(POT1) < 876)
    {
          digitalWrite(LATCH, LOW);
          shiftOut(DATA, CLOCK, MSBFIRST, eight);//changes the 7 segment display to show a 8
          digitalWrite(LATCH,HIGH);
          goes = 8;
    }
    if (analogRead(POT1) > 876 && analogRead(POT1) < 1023)
    {
          digitalWrite(LATCH, LOW);
          shiftOut(DATA, CLOCK, MSBFIRST, nine);//changes the 7 segment display to show a 9
          digitalWrite(LATCH,HIGH);
          goes = 9;
    }
   }

   tone(BUZZER,1000, 1000);//a one second beep is played to tell the user the game has started

   return goes;
  }