//Inlcude libraries
#include <LedControl.h>

//Set the 1st 74HC595 IC pins
int clockPin = 0;
int latchPin = 2;
int dataPin = 15;

//Set the 2nd 74HC595 IC pins
int clockPin1 = 17;
int latchPin1 = 16;
int dataPin1 = 4;

//Set the LED Matrix pins
const int DIN = 23;
const int CS =  5;
const int CLK = 18;

//Set button pins
const int ROCK_PIN = 19;
const int PAPER_PIN =  21;
const int SCISSOR_PIN = 22;

//Set 7 segment digit decoder
int num[10]={63,9,94,91,105,115,119,25,127,123};

//Set LED Matrix Symbols using byte values
byte scisor[8]={0x08,0x08,0x08,0x0B,0xFF,0x08,0x18,0x18};
byte rock[8]={0x00,0x3C,0x7E,0xFF,0xFF,0x7E,0x3C,0x00};
byte paper[8]={0xF8,0x8C,0x8E,0x8F,0x81,0x81,0x81,0xFF};
byte questionMark[8]={0x18,0x24,0x42,0x02,0x04,0x18,0x00,0x18};
byte sad[8]={0x3C,0x42,0xA5,0x81,0x99,0xA5,0x42,0x3C};
byte smile[8]={0x3C,0x42,0xA5,0x81,0xA5,0x99,0x42,0x3C};
byte nuetral[8]={0x3C,0x42,0xA5,0x81,0x81,0xBD,0x42,0x3C};
byte countdown3[8]={0x7E,0x7E,0x06,0x3E,0x3E,0x06,0x7E,0x7E};
byte countdown2[8]={0x7E,0x7E,0x06,0x06,0x7E,0x60,0x7E,0x7E};
byte countdown1[8]={0x1C,0x3C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,};

//Create LedControl instance
LedControl lc=LedControl(DIN,CLK,CS,0);

void setup() {
  //Set button pins to INPUT
  pinMode(ROCK_PIN, INPUT_PULLUP);
  pinMode(PAPER_PIN, INPUT_PULLUP);
  pinMode(SCISSOR_PIN, INPUT_PULLUP);
  //Set pins to output
  pinMode(clockPin, OUTPUT);
  pinMode(latchPin, OUTPUT);
  pinMode(dataPin, OUTPUT);
  pinMode(clockPin1, OUTPUT);
  pinMode(latchPin1, OUTPUT);
  pinMode(dataPin1, OUTPUT);

  lc.shutdown(0,false);       //The MAX72XX is in power-saving mode on startup
  lc.setIntensity(0,5);      // Set the brightness to maximum value
  lc.clearDisplay(0);         // and clear the display

// display a value of 0 to both segment display in the beginning of the program
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, LSBFIRST, num[0]);
  digitalWrite(latchPin, HIGH);

  digitalWrite(latchPin1, LOW);
  shiftOut(dataPin1, clockPin1, LSBFIRST, num[0]);
  digitalWrite(latchPin1, HIGH);
}

void loop() {
  // variable for the player and bot scores
  int pscore = 0;
  int bscore = 0;

  //read the players move and display it to the matrix 
  //calls the countdown and botMove functions
  while(1){
    printByte(questionMark);
    int pmove = readMove();
    int bmove = 0;
    if(pmove == 3){
      printByte(scisor);
      delay(2000);
      countdown();
      bmove = botMove();
    } else if(pmove == 1){
      printByte(rock);
      delay(2000);
      countdown();
      bmove = botMove();
    } else if(pmove == 2){
      printByte(paper);
      delay(2000);
      countdown();
      bmove = botMove();
    } else {
      continue;
    }
    
    //determine the outcome of the match
    if (evalWin(pmove, bmove) == 3){
      printByte(nuetral);
      delay(2000);
      continue;
    } else if(evalWin(pmove, bmove) == 2){
      printByte(sad);
      delay(2000);
      bscore++;
    } else if(evalWin(pmove, bmove) == 1){
      printByte(smile);
      delay(2000);
      pscore++;
    }

    //Reset the match
    if (pscore == 9 || bscore == 9){
      digitalWrite(latchPin, LOW);
      shiftOut(dataPin, clockPin, LSBFIRST, num[0]);
      digitalWrite(latchPin, HIGH);
      
      digitalWrite(latchPin1, LOW);
      shiftOut(dataPin1, clockPin1, LSBFIRST, num[0]);
      digitalWrite(latchPin1, HIGH);
      break; 
    } 
    //display the score of the player and bot 
    else {
      digitalWrite(latchPin, LOW);
      shiftOut(dataPin, clockPin, LSBFIRST, num[bscore]);
      digitalWrite(latchPin, HIGH);
      digitalWrite(latchPin1, LOW);
      shiftOut(dataPin1, clockPin1, LSBFIRST, num[pscore]);
      digitalWrite(latchPin1, HIGH);
      continue;
    }
  }

}

//Displays the byte value into symbol to the LED Matrix
void printByte(byte character [])
{
  int i = 0;
  for(i=0;i<8;i++)
  {
    lc.setRow(0,i,character[i]);
  }
}

//Gets input from button
int readMove(){
  // Read the button states
  int rockState = digitalRead(ROCK_PIN);
  int paperState = digitalRead(PAPER_PIN);
  int scissorState = digitalRead(SCISSOR_PIN);
  char playerMove;
  if (rockState == LOW) {
    return 1;
    //Serial.println("ROCK!");
  }
  if (paperState == LOW) {
    return 2;
    //Serial.println("PAPER!");
  }
  if (scissorState == LOW) {
    return 3;
    //Serial.println("SCISSOR!");
  }
  return 4;
  // Delay to avoid bouncing
  delay(200);

}

//function to display the countdown as a symbol for waiting for the bot to pick a move
void countdown(){
  printByte(countdown3);
  delay(1000);
  printByte(countdown2);
  delay(1000);
  printByte(countdown1);
  delay(1000);
}

//function to pick a random number range from (1-3)and display the pick move of bot
int botMove(){
  int randPick = random(1,4);

  if (randPick == 1){
    printByte(rock);
  }else if (randPick == 2){
    printByte(paper);
  }else if (randPick == 3){
    printByte(scisor);
  }
  delay(3000); 
  return randPick;
}

//Returns the 3 possible outcome of the match
int evalWin(int p,int b){
  if(p==b){
    return 3;
  } else if(p == 3 && b == 1){
    return 2;
  } else if(p == 1 && b == 2){
    return 2;
  } else if(p == 2 && b == 3){
    return 2;
  } else if(p == 2 && b == 1){
    return 1;
  } else if(p == 3 && b == 2){
    return 1;
  } else if(p == 1 && b == 3){
    return 1;
  }
  
}