hangman.kt

package hangman

fun isCorrectInput(userInput: String): Boolean {
    return userInput.length == 1 && userInput[0].isLetter()
}


fun safeUserInput(): Char {
    println("Please input your guess.")
    var input = readln()
    while (!isCorrectInput(input)) {
        if (input.length == 1) {
            println("Use only English Letters!")
        } else {
            println("Length must be 1!")
        }
        println("Please input your guess.")
        input = readln()
    }
    return input[0].uppercaseChar();
}

fun generateNewUserWord(secret: String, guess: Char, currentUserWord: String): String {
    val answer = StringBuilder()
    for (i in 0 until WORD_LENGTH) {
        if (secret[i] == guess) {
            answer.append(guess + SEPARATOR)
        } else {
            answer.append(currentUserWord[i * 2] + SEPARATOR)
        }
    }
    return answer.toString()
}

fun isComplete(secret: String, currentGuess: String): Boolean {
    return secret == currentGuess.replace(SEPARATOR, "")
}

fun main() {
    println(GREETING)
    val secretWord = words.random()
    var currentUserWord = (DASH + SEPARATOR).repeat(WORD_LENGTH)
    println("I guessed a word: $secretWord")
    var i = 0;
    while (i < MAX_ATTEMPTS_COUNT && isComplete(secretWord, currentUserWord)) {
        val guess: Char = safeUserInput()
        val newUserWord = generateNewUserWord(secretWord, guess, currentUserWord)
        if (currentUserWord != newUserWord) {
            println("Great! This letter is in the word! The current word: $newUserWord")
        } else {
            println("Sorry, the secret does not contain the symbol: $guess")
        }
        currentUserWord = newUserWord
        i++
    }
    if (isComplete(secretWord, currentUserWord)) {
        println("Congratulations! You guessed!")
    } else {
        println("Sorry, you lost! My word is $secretWord")
    }
}