struct PlayerData {
  String name;
  int score[4];
  float averageScore;

} Player[5];

// basic info needed
int count = 0;
unsigned long currentMillis = millis();
unsigned long lastMillis = millis();
int ReactionButton = A0;
int StartButton = A1;
const int LED_Start_1 = 5, LED_Start_2 = 6, LED_Start_3 = 7, LED_SerialRead = 8, LED_Reaction = 2;

void setup() {
  Serial.begin(9600);
  delay(50);
  pinMode(LED_Reaction, OUTPUT);
  pinMode(ReactionButton, INPUT_PULLUP);
  pinMode(StartButton, INPUT_PULLUP);
  pinMode(LED_Start_1, OUTPUT);
  pinMode(LED_Start_2, OUTPUT);
  pinMode(LED_Start_3, OUTPUT);
  pinMode(LED_SerialRead, OUTPUT);
  Serial.println("Game ON!");
}


void loop() {
  int player = 0;
  int static thisManyPlayers;
  if (count == 0) {
    thisManyPlayers = howManyPlayers();
  }
  player = whoIsPlaying(thisManyPlayers);
  ActivateReactionTest();
  ReactionTest(player);
  whoIsTheBest(thisManyPlayers, player);
  average(player);
  PrintAllScores(thisManyPlayers);
}

int howManyPlayers() {
  int thisManyPlayers;
  count = 1;
  Serial.println("How many Players? (max 4)");
  while (Serial.available() == 0) {  //Wait for information
    digitalWrite(LED_SerialRead, HIGH);
  }
  if (Serial.available() > 0) {
    // read the incoming byte:
    digitalWrite(LED_SerialRead, LOW);
    int thisManyPlayers = Serial.read();
    thisManyPlayers = thisManyPlayers - '0';
    Serial.print(thisManyPlayers);
    Serial.println(" player(s)");

    for (int i = 0; i < thisManyPlayers; i++) {
      Serial.print("Enter Player ");
      Serial.println(i + 1);
      while (Serial.available() == 0) {  //Wait for information
        digitalWrite(LED_SerialRead, HIGH);
      }
      if (Serial.available() > 0) {
        // read the incoming byte:
        digitalWrite(LED_SerialRead, LOW);
        String playerName = Serial.readString();
        Player[i].name = playerName;
        Serial.print("Welcome ");
        Serial.println(Player[i].name);
      }
    }
    for (int i = 0; i < thisManyPlayers; i++) {
      Serial.print("Player ");
      Serial.print(i + 1);
      Serial.print(": ");
      Serial.println(Player[i].name);
    }

    return thisManyPlayers;
  }
}

int whoIsPlaying(int thisManyPlayers) {
  int player;
  Serial.print(thisManyPlayers);
  Serial.println(" player(s) are playing");
  Serial.println("Who wants to play? (type in your name)");
  while (Serial.available() == 0) {  //Wait for information
    digitalWrite(LED_SerialRead, HIGH);
  }
  if (Serial.available() > 0) {
    // read the incoming byte:
    digitalWrite(LED_SerialRead, LOW);
    String readPlayerName = Serial.readString();
    //readPlayerName.toLowerCase();  // sets all letter casing to lower case
    for (int i = 0; i < thisManyPlayers; i++) {
      if (Player[i].name == readPlayerName) {
        Serial.print(Player[i].name);
        Serial.println(" get ready to play!");
        player = i;
        return player;
      }
    }

    Serial.print(readPlayerName);
    Serial.println("Player does not exist... Try again");
    player = whoIsPlaying(thisManyPlayers);
  }
}



void ActivateReactionTest() {
  Serial.println("Press the button to begin!");
  while (digitalRead(StartButton) == HIGH) {
    // wait for activation
  }
  if (digitalRead(StartButton) == LOW) {
    digitalWrite(LED_Start_1, HIGH);
    delay(500);
    digitalWrite(LED_Start_2, HIGH);
    delay(500);
    digitalWrite(LED_Start_3, HIGH);
    delay(500);
    digitalWrite(LED_Start_1, LOW);
    digitalWrite(LED_Start_2, LOW);
    digitalWrite(LED_Start_3, LOW);
  }
}

void ReactionTest(int player) {
  delay(random(5000));
  digitalWrite(LED_Reaction, HIGH);
  currentMillis = millis();
  while (digitalRead(ReactionButton) == HIGH) {
    //wait
  }
  if (digitalRead(ReactionButton == LOW)) {
    delay(10);  // helps remove the multiple LOWS read when hitting the button
    digitalWrite(LED_Reaction, LOW);
    int lastMillis = millis();
    int PlayerTime = lastMillis - currentMillis;

    whichScore(player, PlayerTime);
    Serial.print(PlayerTime);
    Serial.println("  milliseconds ");
  }
}

int whichScore(int player, int PlayerTime) {
  int placement;
  for (int i = 0; i < 4; i++) {  //check to see if there is a free slot for the new score (0)
    if (Player[player].score[i] == 0) {
      Player[player].score[i] = PlayerTime;
      placement = i;
      break;  //stop the loop
    }
  }
  for (int i = 0; i < 4; i++) {  // switch the scores, if a score is better
    if (PlayerTime < Player[player].score[i]) {
      int *pScore;
      int *pPlayerTime;
      int switchHelper;
      pScore = &Player[player].score[i];
      pPlayerTime = &PlayerTime;

      switchHelper = *pScore;
      *pScore = *pPlayerTime;
      *pPlayerTime = switchHelper;

      Player[player].score[i] = *pScore;
      Player[player].score[placement] = *pPlayerTime;

      Serial.println("YOU IMPROVED!");
    }
  }
}
int whoIsTheBest(int thisManyPlayers, int player) {
  for (int i = 0; i < thisManyPlayers; i++)
    if (Player[player].score[0] < Player[i].score[0] && Player[player].score[0] > 0 || Player[i].score[0] == 0) {
      Serial.println("we are here");
      switchStats(player, i);
      Serial.print("Old player:");
      Serial.print(player);
      Serial.print(" Old i:");
      Serial.println(i);
      //player = i; //switching players so it matches 
      Serial.print("New player:");
      Serial.print(player);
      Serial.print(" New i:");
      Serial.println(i);
     // i = 0; // reset loop so it will check for others to switch
    } //return player; //need to report back which player is being calculated for the average
}

int switchStats(int player_1, int player_2) {
  int switchHelper;
  int *pScore_1;
  int *pScore_2;
  for (int i = 0; i < 4; i++) {
    pScore_1 = &Player[player_1].score[i];
    pScore_2 = &Player[player_2].score[i];

    switchHelper = *pScore_1;
    *pScore_1 = *pScore_2;
    *pScore_2 = switchHelper;
  }
  switchName(&Player[player_1].name, &Player[player_2].name);
}

String switchName(String *player_1, String *player_2) {
  String switchHelper;

  switchHelper = *player_1;
  *player_1 = *player_2;
  *player_2 = switchHelper;
  Serial.println("so far so good");
}

float average(int player) {
  float averageScore;
  int total = 0;
  int amountScore = 0;


  for (int i = 0; i < 4; i++) {  //check to see if the PlayerTime is bigger than
    if (Player[player].score[i] == 0) {
      amountScore = i;
      break;  //stop the loop
    }
  }
  for (int i = 0; i <= amountScore; i++) {
    total += Player[player].score[i];
  }
  averageScore = total / amountScore;
  Player[player].averageScore = averageScore;
}


int PrintAllScores(int thisManyPlayers) {

  for (int i = 0; i < thisManyPlayers; i++) {
    Serial.print(Player[i].name);
    Serial.print(":  ");
    Serial.print(Player[i].score[0]);
    Serial.print(" ");
    Serial.print(Player[i].score[1]);
    Serial.print(" ");
    Serial.print(Player[i].score[2]);
    Serial.print(" ");
    Serial.print(Player[i].score[3]);
    Serial.print(" Avg: ");
    Serial.println(Player[i].averageScore);
    // whoIsPlaying(thisManyPlayers);
  }
  return thisManyPlayers;
}