#include <IRremote.h>
#include <Servo.h>

IRrecv reciever(12);

int board[9]={0,0,0,0,0,0,0,0,0};
int pos[8];

int PossibleWins(int pos[]){ //returns avilable pos number
  for(int i=0;i<8;i++){
      if(pos[i]==2)
        return i;
  }
  return -1;
} 
int PossibleLoses(int pos[]){
  for(int i=0;i<8;i++){
      if(pos[i]==-2)
        return i;
  }
  return -1;
}

int GetInput(){
  if(reciever.decode()){
    int input = IRdecode(reciever.decodedIRData.command);
  for (int i=1;i<10;i++){
    if (input==i){
      board[i-1]=-1;
    }
  }return 1;
  }else{return 0;}
}

int DecryptPack(int pack){
  switch(pack){
    case 0 :
    if(board[0]==0){
      return 0;
    }else if(board[1]==0){
      return 1;
    }else if(board[2]==0){
      return 2;
    }
    case 1 :
    if(board[3]==0){
      return 3;
    }else if(board[4]==0){
      return 4;
    }else if(board[5]==0){
      return 5;
    }
    case 2 :
    if(board[6]==0){
      return 6;
    }else if(board[7]==0){
      return 7;
    }else if(board[8]==0){
      return 8;
    }
    case 3 :
    if(board[0]==0){
      return 0;
    }else if(board[3]==0){
      return 3;
    }else if(board[6]==0){
      return 6;
    }
    case 4 :
    if(board[1]==0){
      return 1;
    }else if(board[4]==0){
      return 4;
    }else if(board[7]==0){
      return 7;
    }
    case 5 :
    if(board[2]==0){
      return 2;
    }else if(board[5]==0){
      return 5;
    }else if(board[8]==0){
      return 8;
    }
    case 6 :
    if(board[0]==0){
      return 0;
    }else if(board[4]==0){
      return 4;
    }else if(board[8]==0){
      return 8;
    }
    case 7 :
    if(board[2]==0){
      return 2;
    }else if(board[4]==0){
      return 4;
    }else if(board[6]==0){
      return 6;
    }
  }
}
int IRdecode(int val){
  switch(val){
    case 48:
      return 1;
      break;
    case 24:
      return 2;
      break;
    case 122:
      return 3;
      break;
    case 16:
      return 4;
      break;
    case 56:
      return 5;
      break;
    case 90:
      return 6;
      break;
    case 66:
      return 2;
      break;
    case 74:
      return 2;
      break;
    case 82:
      return 9;
      break;
    default:
      return 0;
  }
}

int RandomMove(){
  if(board[4]==0){
    return 4;
  }else{
     // something here
    }
}
void setup() {
  // put your setup code here, to run once:
  reciever.enableIRIn();
}

void loop() {
  // put your main code here, to run repeatedly:
  if(GetInput()){
  
  pos[0]=board[0]+board[1]+board[2];
  pos[1]=board[3]+board[4]+board[5];
  pos[2]=board[6]+board[7]+board[8];
  pos[3]=board[0]+board[3]+board[6];
  pos[4]=board[1]+board[4]+board[7];
  pos[5]=board[2]+board[5]+board[8];
  pos[6]=board[0]+board[4]+board[8];
  pos[7]=board[2]+board[4]+board[6];

  int pack=PossibleWins(pos);
  if (pack==-1){
     pack = PossibleLoses(pos);}

  int move =-1;
    
  if(pack>-1){
    move = DecryptPack(pack);
    }else{
      move = RandomMove();
    }
  }
}