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AI.java
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package Lab4;
import javax.swing.JOptionPane;
/*
* Artificial Intelligence:
* This class contains both the Easy and Hard mode AI.
* The Easy mode AI simply chooses a move at random, while the Hard
* mode AI tracks the game's progress, learns about the player, and
* employs several different tactics in an attempt to outwit them.
*/
public class AI {
static RandomGen random = new RandomGen();
static WinCalc wincalc = new WinCalc();
//Variable to hold computer's move choice
static int result;
//Variables to determine outcome of last game
static boolean npcWin;
static boolean tie;
//Variables to keep track of total rounds, and last three game outcomes
static int rounds;
static int winOne, winTwo, winThree;
//Variable to determine if a drastic strategy change is needed to counter
//the usage of a streak-based strategy
static int emergencyReset=0;
//Variables to track winning streaks and Computer move streaks
static int[] streak = {0, 0, 0};
static int[] cMovStreak = {0, 0, 0};
static int cMov=0, cMovMax=0, cMovLoop=0;
//Array to keep track of moves used in game
static int[] movTracker = {0, 0, 0, 0, 0, 0, 0, 0, 0};
// [0-2] [3-5] [6-8]
// uWinMov uFavMov cWinMov
//Static variable to track Computer's move considerations
static int[] choose = {0, 0, 0};
//choose[0]=Scissors choose[1]=Paper choose[2]=Rock
//Easy AI difficulty
public int easy()
{
result = random.move();
return result;
}
//Hard AI difficulty hub
public int hard(boolean npcWin, boolean tie, int rounds)
{
//Update winning/move streak variables
updater(npcWin, tie, rounds);
//Initialize result variable
result=1;
if ((wincalc.get_cWins()<wincalc.get_uWins())&&(random.random()==6)||(random.random()==2))
{result=easy();}
//If there's a user winning streak, a tie streak, or the computer
//has overused a move, call either comboBreaker or loopBreaker
//(Random number argument included to add a measure of unpredictability)
else if ((streak[0]>2)||(streak[1]>1))
{result=comboBreaker();
emergencyReset++;}
else if (cMovMax>random.move())
{result=loopBreaker();
emergencyReset++;}
//If neither of the above apply, do one of the following strategies
//depending on last game's outcome
else
{if (rounds==1)
{result=stratOne();
if (emergencyReset>0)
{emergencyReset--;}
}
else if (npcWin)
{result=stratTwo();
if (emergencyReset>0)
{emergencyReset--;}}
else
{result=stratThree();
if (emergencyReset>0)
{emergencyReset--;}}
}
parser(result);
return result;
}
//The following methods belong to the Hard method declared above
//Strategy for first game (choose something other than rock)
public int stratOne()
{
int move = random.coin();
switch (move)
{case 0:
move = 2; //Paper
break;
case 1:
move = 3; //Rock
break;}
return move;
}
//*************************************
// Main Strategies for Hard AI
//*************************************
//Strategy if computer won last game
public int stratTwo()
{
nextSequence();
pastSequenceComp();
moveCounts();
//Enact emergency reset if needed to potentially alter move choice
if (emergencyReset>0)
{switch (random.move())
{case 1:
choose[0]++;
break;
case 2:
choose[1]++;
break;
case 3:
choose[2]++;
break;
}
}
moveCounts();
int move=choose[0];
for (int i=1; i<3; i++)
{
if (move<choose[i])
{move=choose[i];}
}
return move;
}
//Strategy if computer lost last game
public int stratThree()
{
nextSequence();
pastSequenceUser();
moveCounts();
//Enact emergency reset if needed to potentially alter move choice
if (emergencyReset>0)
{switch (random.move())
{case 1:
choose[0]++;
break;
case 2:
choose[1]++;
break;
case 3:
choose[2]++;
break;
}
}
int move=choose[0];
for (int i=1; i<3; i++)
{
if (move<choose[i])
{move=choose[i];}
}
return move;
}
//Strategy if the user is on a winning streak, or a tie streak
public int comboBreaker()
{
breaker();
int move=choose[0];
for (int i=1; i<3; i++)
{
if (move<choose[i])
{move=choose[i];}
}
return move;
}
//Strategy if the Computer is stuck in a loop (using same move too much)
public int loopBreaker()
{
deLooper();
int move=choose[0];
for (int i=1; i<3; i++)
{
if (move<choose[i])
{move=choose[i];}
}
return move;
}
//*************************************
// Sub-Strategies for Hard AI
//*************************************
//Sub-Strategies regarding the last game for the computer to consider
public void nextSequence()
{
//If comp won last game, move forward one move in sequence (R-P-S)
if (npcWin)
{switch (winOne)
{case 7: //Scissors
choose[2]++; //Rock
break;
case 8: //Paper
choose[0]++; //Scissors
break;
case 9: //Rock
choose[1]++; //Paper
break;
default: //Error for win code # unrelated to npc
JOptionPane.showMessageDialog(null,
"Error - Unknown npc Win value - AI.nextSequence 108",
"digiRPS - ERROR",
JOptionPane.ERROR_MESSAGE);
}
}
else if (tie)
{switch (random.move())
{case 1: //Scissors
choose[2]++; //Rock
break;
case 2: //Paper
choose[0]++; //Scissors
break;
case 3: //Rock
choose[1]++; //Paper
break;
default: //Error for win code # unrelated to npc
JOptionPane.showMessageDialog(null,
"Error - Unknown npc Win value - AI.nextSequence 142",
"digiRPS - ERROR",
JOptionPane.ERROR_MESSAGE);
}
}
else //If comp lost last game, move forward two moves in sequence (R-P-S)
{switch (winOne)
{case 1:
case 4: //Scissors
choose[1]++; //Paper
break;
case 2:
case 5: //Paper
choose[2]++; //Rock
break;
case 3:
case 6: //Rock
choose[0]++; //Scissors
break;
default: //Error for win code # unrelated to npc
JOptionPane.showMessageDialog(null,
"Error - Unknown npc Win value - AI.nextSequence 163",
"digiRPS - ERROR",
JOptionPane.ERROR_MESSAGE);
}
}
}
//Sub-Strategies that cover the last three moves, if computer won last game
public void pastSequenceComp()
{
int uWins=wincalc.get_uWins();
int cWins=wincalc.get_cWins();
int coin=random.coin();
//Determine strategy based on last moves, and if computer is winning
if (cWins>uWins) //If computer is winning, use these strategies
{if (winOne!=winTwo)
{switch(winOne)
{case 7: //Scissors
choose[2]++; //Rock
break;
case 8: //Paper
choose[0]++; //Scissors
break;
case 9: //Rock
choose[1]++; //Paper
break;
}
}
else if ((winOne==winTwo)&&(winOne!=winThree))
{switch(winOne)
{case 7: //Scissors
choose[0]++; //Scissors
break;
case 8: //Paper
choose[1]++; //Paper
break;
case 9: //Rock
choose[2]++; //Rock
break;
}
}
else if ((winOne==winTwo)&&(winOne==winThree))
{switch(winOne)
{case 7: //Scissors
if (coin==0)
{choose[1]++;} //Paper
else
{choose[2]++;} //Rock
break;
case 8: //Paper
if (coin==0)
{choose[0]++;} //Scissors
else
{choose[2]++;} //Rock
break;
case 9: //Rock
if (coin==0)
{choose[0]++;} //Scissors
else
{choose[1]++;} //Paper
break;
}
}
}
else if (cWins<uWins) //If computer is losing, use these strategies
{if ((winOne==winTwo)&&(winOne==winThree))
{switch(winOne)
{case 7: //Scissors
if (coin==0)
{choose[1]++;} //Paper
else
{choose[2]++;} //Rock
break;
case 8: //Paper
if (coin==0)
{choose[0]++;} //Scissors
else
{choose[2]++;} //Rock
break;
case 9: //Rock
if (coin==0)
{choose[0]++;} //Scissors
else
{choose[1]++;} //Paper
break;
}
}
else
{switch (coin)
{case 0:
{switch(winOne)
{case 7: //Scissors
choose[2]++; //Rock
break;
case 8: //Paper
choose[0]++; //Scissors
break;
case 9: //Rock
choose[1]++; //Paper
break;
}
}
case 1:
switch(winOne)
{case 7: //Scissors
choose[0]++; //Scissors
break;
case 8: //Paper
choose[1]++; //Paper
break;
case 9: //Rock
choose[2]++; //Rock
break;
}
}
}
}
}
//Sub-Strategies that cover the last three moves, if computer lost last game
public void pastSequenceUser()
{
int uWins=wincalc.get_uWins();
int cWins=wincalc.get_cWins();
int coin=random.coin();
if (cWins>uWins) //If computer is winning, use these less risky strategies
{if (winOne!=winTwo)
{switch(winOne)
{case 4: //Scissors
choose[2]++; //Rock
break;
case 5: //Paper
choose[0]++; //Scissors
break;
case 6: //Rock
choose[1]++; //Paper
break;
}
}
else if ((winOne==winTwo)&&(winOne!=winThree))
{switch(winOne)
{case 4: //Scissors
choose[2]++; //Rock
break;
case 5: //Paper
choose[0]++; //Scissors
break;
case 6: //Rock
choose[1]++; //Paper
break;
}
}
else if ((winOne==winTwo)&&(winOne==winThree))
{switch(winOne)
{case 4: //Scissors
choose[2]++; //Rock
break;
case 5: //Paper
choose[0]++; //Scissors
break;
case 6: //Rock
choose[1]++; //Paper
break;
}
}
}
else if (cWins<uWins) //If computer is losing, use these strategies
{if ((winOne==winTwo)&&(winOne==winThree))
{switch(winOne)
{case 4: //Scissors
if (coin==0)
{choose[1]++;} //Paper
else
{choose[2]++;} //Scissors
break;
case 5: //Paper
if (coin==0)
{choose[0]++;} //Scissors
else
{choose[2]++;} //Rock
break;
case 6: //Rock
if (coin==0)
{choose[0]++;} //Scissors
else
{choose[2]++;} //Rock
break;
}
}
else
{switch (coin)
{case 0:
{switch(winOne)
{case 4: //Scissors
choose[2]++; //Rock
break;
case 5: //Paper
choose[0]++; //Scissors
break;
case 6: //Rock
choose[1]++; //Paper
break;
}
}
case 1:
switch(winOne)
{case 4: //Scissors
choose[0]++; //Scissors
break;
case 5: //Paper
choose[1]++; //Paper
break;
case 6: //Rock
choose[2]++; //Rock
break;
}
}
}
}
}
//Method to track the user and computer's moves so far
public void moveCounts()
{
/* Added redundant move counters so that AI can purge move counts
* during an emergency reset.
*/
switch (wincalc.getMoves(1)) //AI uses code number "1" to get User's winning moves
{case 1: //Scissors
movTracker[0]++;
break;
case 2: //Paper
movTracker[1]++;
break;
case 3: //Rock
movTracker[2]++;
break;
}
switch (wincalc.getMoves(2)) //AI uses code number "2" to get User's most used move
{case 1: //Scissors
movTracker[3]++;
break;
case 2: //Paper
movTracker[4]++;
break;
case 3: //Rock
movTracker[5]++;
break;
}
switch (wincalc.getMoves(3)) //AI uses code number "3" to get its own winning moves
{case 1: //Scissors
movTracker[6]++;
break;
case 2: //Paper
movTracker[7]++;
break;
case 3: //Rock
movTracker[8]++;
break;
}
//For loop to convert redundant move trackers into readable move code
int uWinMov=1;
int uWinMax=movTracker[0];
int uFavMov=1;
int uFavMax=movTracker[3];
int cWinMov=1;
int cWinMax=movTracker[6];
for (int i=1; i<9; i++)
{
if ((i<3)&&(uWinMax<movTracker[i]))
{uWinMax=movTracker[i];
if (i==1)
{uWinMov=2;}
if (i==2)
{uWinMov=3;}
}
if ((i>2)&&(i<6)&&(uFavMax<movTracker[i]))
{uFavMax=movTracker[i];
if (i==3)
{uFavMov=1;}
if (i==4)
{uFavMov=2;}
if (i==5)
{uFavMov=3;}
}
if ((i>5)&&(cWinMax<movTracker[i]))
{cWinMax=movTracker[i];
if (i==6)
{cWinMov=1;}
if (i==7)
{cWinMov=2;}
if (i==8)
{cWinMov=3;}
}
}
//Find user's winning moves, and plan accordingly
switch (uWinMov)
{case 1: //Scissors
choose[2]++; //Rock
break;
case 2: //Paper
choose[0]++; //Scissors
break;
case 3: //Rock
choose[1]++; //Paper
break;
}
//Find user's most used moves, and plan accordingly
switch (uFavMov)
{case 1: //Scissors
choose[2]++; //Rock
break;
case 2: //Paper
choose[0]++; //Scissors
break;
case 3: //Rock
choose[1]++; //Paper
break;
}
//Find computer's own winning moves, and plan accordingly
switch (cWinMov)
{case 1: //Scissors
choose[0]++; //Scissors
break;
case 2: //Paper
choose[1]++; //Paper
break;
case 3: //Rock
choose[2]++; //Rock
break;
}
}
//Sub-Strategies for the comboBreaker method
public void breaker()
{
//Determines if user changed their move after playing the same one twice
//If so, computer makes that move next turn to prevent any streaks
if ((winOne!=winTwo)&&(winTwo==winThree)&&(winTwo<7)&&(winOne<7))
{switch (winOne)
{case 1:
if ((random.random()-1)>1)
{choose[0]+=4;}
break;
case 2:
if ((random.random()-1)>1)
{choose[1]+=4;}
break;
case 3:
if ((random.random()-1)>1)
{choose[2]+=4;}
break;
case 4:
if ((random.random()-1)>1)
{choose[0]+=4;}
break;
case 5:
if ((random.random()-1)>1)
{choose[1]+=4;}
break;
case 6:
if ((random.random()-1)>1)
{choose[2]+=4;}
break;
}
}
switch (winOne)
{case 1: //Scissors
{choose[2]++;}
break;
case 2: //Paper
{choose[0]++;}
break;
case 3: //Rock
{choose[1]++;}
break;
case 4: //Scissors
{choose[2]++;}
break;
case 5: //Paper
{choose[0]++;}
break;
case 6: //Rock
{choose[1]++;}
break;
}
switch (winTwo)
{case 1: //Scissors
{choose[2]++;}
break;
case 2: //Paper
{choose[0]++;}
break;
case 3: //Rock
{choose[1]++;}
break;
case 4: //Scissors
{choose[2]++;}
break;
case 5: //Paper
{choose[0]++;}
break;
case 6: //Rock
{choose[1]++;}
break;
}
switch (winThree)
{case 1: //Scissors
{choose[2]++;}
break;
case 2: //Paper
{choose[0]++;}
break;
case 3: //Rock
{choose[1]++;}
break;
case 4: //Scissors
{choose[2]++;}
break;
case 5: //Paper
{choose[2]++;}
break;
case 6: //Rock
{choose[1]++;}
break;
}
}
//Sub-Strategies for the loopBreaker method
public void deLooper()
{
if ((streak[2]>2)&&(random.random()>1))
{switch (cMov)
{case 1: //Scissors
if (random.move()<2)
{choose[0]++;}
else
{choose[2]++;}
break;
case 2: //Paper
if (random.move()<2)
{choose[1]++;}
else
{choose[0]++;}
break;
case 3: //Rock
if (random.move()<2)
{choose[2]++;}
else
{choose[1]++;}
break;}
}
else
{switch (cMov)
{case 1: //Scissors
if (random.move()<2)
{choose[0]++;}
else
{choose[2]++;}
break;
case 2: //Paper
if (random.move()<2)
{choose[1]++;}
else
{choose[0]++;}
break;
case 3: //Rock
if (random.move()<2)
{choose[2]++;}
else
{choose[1]++;}
break;
}
}
}
//Method to update static variables at start of new round
public void updater(boolean npcWin, boolean tie, int rounds)
{
//Make sure move chooser array is reset to 0
for (int i=0; i<3; i++)
{choose [i]=0;}
//Enact emergencyReset if needed, and purge move counts
if (emergencyReset>1)
{for (int i=0; i<9; i++)
{movTracker[i]=0;}
}
//Update values for tracking variables for last three rounds
winThree=winTwo;
winTwo=winOne;
this.winOne=WinCalc.winOne;
//Update number of rounds elapsed
this.rounds=rounds;
//Update npcWin and tie booleans
this.npcWin=npcWin;
this.tie=tie;
//Update general winning/tie streak tracking array
streak[0]=WinCalc.uStreak;
streak[1]=WinCalc.tieStreak;
streak[2]=WinCalc.cStreak;
//Update computer move streak tracking array
System.arraycopy(WinCalc.cMovStreak, 0,
this.cMovStreak, 0,
WinCalc.cMovStreak.length);
//Parse cMoveStreak array values into proper move code
cMovMax=cMovStreak[0]; //Most used move - Array Form
cMov=1; //Most used move - Move Code Form
for (int i=1; i<3; i++)
{if (cMovMax<cMovStreak[i])
{cMovMax=cMovStreak[i];
if (i==1)
{cMov=2;}
else if (i==2)
{cMov=3;}
}
}
}
//Method for final parsing of computer's move choice into correct code
public void parser(int result)
{
for (int i=0; i<2; i++)
{
if ((choose[0]==choose[1])||(choose[0]==choose[2])||(choose[1]==choose[2]))
{result=random.move();}
else if (result==choose[0])
{result=1;}
else if (result==choose[1])
{result=2;}
else if (result==choose[2])
{result=3;}
else
{result=random.move();}
/* If Level 2 emergency reset is active, rerun the loop to
* potentially alter the outcome
*/
if ((emergencyReset>2)&&(i==0))
{switch (result)
{case 1:
if (random.coin()==0)
{choose[1]+=2;}
else
{choose[2]+=2;}
break;
case 2:
if (random.coin()==0)
{choose[0]+=2;}
else
{choose[2]+=2;}
break;
case 3:
if (random.coin()==0)
{choose[0]+=2;}
else
{choose[1]+=2;}
break;
}
}
}
}
}