From 283913d87639bfc195160840d11fb2b5fdead337 Mon Sep 17 00:00:00 2001
From: AndruhaMan <andreysut12@gmail.com>
Date: Thu, 24 Aug 2023 18:48:16 +0300
Subject: [PATCH 1/2] The task is completed

---
 src/app.js            | 32 ++++++++++++++++++++++++++++++++
 src/bullsAndCows.js   | 26 ++++++++++++++++++++++++++
 src/generateNumber.js | 17 +++++++++++++++++
 src/terminal.js       | 10 ++++++++++
 src/validateNumber.js | 13 +++++++++++++
 5 files changed, 98 insertions(+)
 create mode 100644 src/bullsAndCows.js
 create mode 100644 src/generateNumber.js
 create mode 100644 src/terminal.js
 create mode 100644 src/validateNumber.js

diff --git a/src/app.js b/src/app.js
index ad9a93a..7548c32 100644
--- a/src/app.js
+++ b/src/app.js
@@ -1 +1,33 @@
+/* eslint-disable no-console */
 'use strict';
+
+const { getBullsAndCows } = require('./bullsAndCows');
+const { generateNumber } = require('./generateNumber');
+const { terminal } = require('./terminal');
+const { isNumberValid } = require('./validateNumber');
+
+const generatedNumber = String(generateNumber());
+
+const startGame = () => {
+  terminal.question('Try to quess the number:\n', (enteredNumber) => {
+    if (!isNumberValid(enteredNumber)) {
+      console.log('Invalid number\n');
+      startGame();
+    } else {
+      const bullsAndCows = getBullsAndCows(generatedNumber, enteredNumber);
+      const bulls = bullsAndCows[0];
+      const cows = bullsAndCows[1];
+
+      console.log(`Bulls: ${bulls}, Cows: ${cows}\n`);
+
+      if (bulls === 4) {
+        console.log('Congratulations, you win!');
+        terminal.close();
+      } else {
+        startGame();
+      }
+    }
+  });
+};
+
+startGame();
diff --git a/src/bullsAndCows.js b/src/bullsAndCows.js
new file mode 100644
index 0000000..700407b
--- /dev/null
+++ b/src/bullsAndCows.js
@@ -0,0 +1,26 @@
+'use strict';
+
+const NUM_LENGTH = 4;
+
+module.exports.getBullsAndCows = (numberToGuess, enteredNumber) => {
+  const numberToGuessCopy = numberToGuess.split('');
+  const enteredNumberCopy = enteredNumber.split('');
+  let bullsCount = 0;
+  let cowsCount = 0;
+
+  for (let i = 0; i < NUM_LENGTH; i++) {
+    const isBull = enteredNumberCopy[0] === numberToGuessCopy[0];
+    const isCow = numberToGuess.includes(enteredNumberCopy[0]);
+
+    if (isBull) {
+      bullsCount++;
+    } else if (isCow) {
+      cowsCount++;
+    }
+
+    numberToGuessCopy.shift();
+    enteredNumberCopy.shift();
+  }
+
+  return [bullsCount, cowsCount];
+};
diff --git a/src/generateNumber.js b/src/generateNumber.js
new file mode 100644
index 0000000..38028e4
--- /dev/null
+++ b/src/generateNumber.js
@@ -0,0 +1,17 @@
+'use strict';
+
+const NUM_LENGTH = 4;
+
+module.exports.generateNumber = () => {
+  const digitsArray = [];
+
+  while (digitsArray.length < NUM_LENGTH) {
+    const numToPush = Math.floor(Math.random() * 10);
+
+    if (!digitsArray.includes(numToPush)) {
+      digitsArray.push(numToPush);
+    }
+  }
+
+  return digitsArray.join('');
+};
diff --git a/src/terminal.js b/src/terminal.js
new file mode 100644
index 0000000..7c6c304
--- /dev/null
+++ b/src/terminal.js
@@ -0,0 +1,10 @@
+'use strict';
+
+const readline = require('readline');
+
+const terminal = readline.createInterface({
+  input: process.stdin,
+  output: process.stdout,
+});
+
+module.exports = { terminal };
diff --git a/src/validateNumber.js b/src/validateNumber.js
new file mode 100644
index 0000000..9f64337
--- /dev/null
+++ b/src/validateNumber.js
@@ -0,0 +1,13 @@
+'use strict';
+
+const NUM_LENGTH = 4;
+
+module.exports.isNumberValid = (number) => {
+  for (let i = 1; i < NUM_LENGTH; i++) {
+    if (number[i] === number[i - 1]) {
+      return false;
+    }
+  }
+
+  return !isNaN(+number) && number.length === NUM_LENGTH;
+};

From 56cfdba67805bc87c01c36c345a18ad865f32afe Mon Sep 17 00:00:00 2001
From: AndruhaMan <andreysut12@gmail.com>
Date: Fri, 25 Aug 2023 12:53:20 +0300
Subject: [PATCH 2/2] Fix problems

---
 src/bullsAndCows.js   | 9 ++-------
 src/generateNumber.js | 4 ++++
 src/validateNumber.js | 9 +++++++--
 3 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/src/bullsAndCows.js b/src/bullsAndCows.js
index 700407b..28d86d3 100644
--- a/src/bullsAndCows.js
+++ b/src/bullsAndCows.js
@@ -3,23 +3,18 @@
 const NUM_LENGTH = 4;
 
 module.exports.getBullsAndCows = (numberToGuess, enteredNumber) => {
-  const numberToGuessCopy = numberToGuess.split('');
-  const enteredNumberCopy = enteredNumber.split('');
   let bullsCount = 0;
   let cowsCount = 0;
 
   for (let i = 0; i < NUM_LENGTH; i++) {
-    const isBull = enteredNumberCopy[0] === numberToGuessCopy[0];
-    const isCow = numberToGuess.includes(enteredNumberCopy[0]);
+    const isBull = enteredNumber[i] === numberToGuess[i];
+    const isCow = numberToGuess.includes(enteredNumber[i]);
 
     if (isBull) {
       bullsCount++;
     } else if (isCow) {
       cowsCount++;
     }
-
-    numberToGuessCopy.shift();
-    enteredNumberCopy.shift();
   }
 
   return [bullsCount, cowsCount];
diff --git a/src/generateNumber.js b/src/generateNumber.js
index 38028e4..c632fb3 100644
--- a/src/generateNumber.js
+++ b/src/generateNumber.js
@@ -5,6 +5,10 @@ const NUM_LENGTH = 4;
 module.exports.generateNumber = () => {
   const digitsArray = [];
 
+  const randomNumExceptZero = Math.floor(Math.random() * 9 + 1);
+
+  digitsArray.push(randomNumExceptZero);
+
   while (digitsArray.length < NUM_LENGTH) {
     const numToPush = Math.floor(Math.random() * 10);
 
diff --git a/src/validateNumber.js b/src/validateNumber.js
index 9f64337..6e27d88 100644
--- a/src/validateNumber.js
+++ b/src/validateNumber.js
@@ -3,8 +3,13 @@
 const NUM_LENGTH = 4;
 
 module.exports.isNumberValid = (number) => {
-  for (let i = 1; i < NUM_LENGTH; i++) {
-    if (number[i] === number[i - 1]) {
+  const digitsArray = number.split('');
+
+  for (let i = 0; i < NUM_LENGTH; i++) {
+    if (
+      digitsArray.indexOf(digitsArray[i])
+      !== digitsArray.lastIndexOf(digitsArray[i])
+    ) {
       return false;
     }
   }