Solution

src/app.js

@@ -1 +1,50 @@
-// write code here
+/* eslint-disable no-console */
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+
+function moveFiles() {
+  const source = process.argv[2];
+  let destination = process.argv[3];
+
+  if (!source || !destination) {
+    console.error('Usage: node index <source> <destination>');
+
+    return;
+  }
+
+  try {
+    const srcStats = fs.statSync(source);
+
+    if (!srcStats.isFile()) {
+      console.error('Source is not a file');
+
+      return;
+    }
+
+    const isTargetDir = destination.endsWith('/') || destination.endsWith('\\');
+    const destExists = fs.existsSync(destination);
+    const isDestDir = destExists && fs.lstatSync(destination).isDirectory();
+
+    if (isTargetDir || isDestDir) {
+      if (!destExists && isTargetDir) {
+        console.error('Error: Detination directory does not exist.');
+
+        return;
+      }
+
+      destination = path.join(destination, path.basename(source));
+    }
+
+    fs.renameSync(source, destination);
+  } catch (err) {
+    if (err.code === 'ENOENT') {
+      console.error('Error: File or directory not found.');
+    } else {
+      console.error(`Error: ${err.message}`);
+    }
+  }
+}
+
+moveFiles();