package INF101.lab1.rockPaperScissors;

import java.util.List;
import java.util.Random;
import java.util.Arrays;
import java.util.Scanner;

public class RockPaperScissors {

public static void main(String[] args) {
/*
* The code here does two things:
* It first creates a new RockPaperScissors -object with the
* code `new RockPaperScissors()`. Then it calls the `run()`
* method on the newly created object.
*/
new RockPaperScissors().run();
}

Scanner sc = new Scanner(System.in);
int roundCounter = 1;
int humanScore = 0;
int computerScore = 0;
List<String> rpsChoices = Arrays.asList("rock", "paper", "scissors");
Random random = new Random();

public void run() {
while (true) {
System.out.println("Let's play round " + roundCounter);
String myChoice = humanChoice();
String compChoice = computerChoice();

String matchSummary = String.format("Human chose %s, computer chose %s. ", myChoice, compChoice);

if (myChoice.equals(weaknessOf(compChoice))) {
matchSummary += "Human wins!";
humanScore++;
} else if (compChoice.equals(weaknessOf(myChoice))) {
matchSummary += "Computer wins!";
computerScore++;
} else {
matchSummary += "It's a tie!";
}

System.out.println(matchSummary);
System.out.printf("Score: human %s, computer %s\n", humanScore, computerScore);

if (!wantsToPlayAgain()) {
System.out.println("Bye bye :)");
break;
}
roundCounter++;
}
}

/**
* Reads input from console with given prompt
* @param prompt
* @return string input answer from user
*/
public String readInput(String prompt) {
System.out.println(prompt);
String userInput = sc.next();
return userInput;
}

/*
* Weapon selection
*/
public String humanChoice() {
String userAnswer;
while (true) {
userAnswer = readInput("Your choice (Rock/Paper/Scissors)?").toLowerCase();
if (rpsChoices.contains(userAnswer))
return userAnswer;
else
System.out.printf("I do not understand %s. Could you try again?\n", userAnswer);
}
}

public String computerChoice() {
int randomNumber = random.nextInt(rpsChoices.size());
return rpsChoices.get(randomNumber);
}

public boolean wantsToPlayAgain() {
String continuePlayingAnswer;
while (true) {
continuePlayingAnswer = readInput("Do you wish to continue playing? (y/n)?").toLowerCase();

if (continuePlayingAnswer.equals("n"))
return false;
else if (continuePlayingAnswer.equals("y"))
return true;
else
System.out.println("I do not understand " + continuePlayingAnswer + ". Could you try again?");
}
}

public String weaknessOf(String string) {
if (string.equals("rock")) {
return "paper";
} else if (string.equals("scissors")) {
return "rock";
} else {
return "scissors";
}
}

}