Glasgow | 26-ITP-May | Sandani Kannangara | Sprint 3 | Alarm Clock

Sprint-3/alarmclock/alarmclock.js

@@ -1,4 +1,45 @@
-function setAlarm() {}
+const alarmTime = document.getElementById("alarmSet");
+const timeRemaining = document.getElementById("timeRemaining");
+let remainingSeconds;
+let timer;
+
+function setAlarm() {
+  pauseAlarm();
+
+  remainingSeconds = Number(alarmTime.value);
+
+  if (!Number.isFinite(remainingSeconds) || remainingSeconds <= 0) {
+    alert("Please enter a valid number.");
+    return;
+  }
+
+  displayTimeRemaining();
+
+  timer = setInterval(() => {
+    remainingSeconds--;
+
+    if (remainingSeconds <= 0) {
+      remainingSeconds = 0;
+      displayTimeRemaining();
+      clearInterval(timer);
+      window.playAlarm();
+      return;
+    }
+
+    displayTimeRemaining();
+  }, 1000);
+}
+
+function displayTimeRemaining() {
+  let minutes = Math.floor(remainingSeconds / 60);
+  let seconds = remainingSeconds % 60;
+  const formatTime =
+    minutes.toString().padStart(2, "0") +
+    ":" +
+    seconds.toString().padStart(2, "0");
+
+  timeRemaining.textContent = `Time Remaining: ${formatTime}`;
+}
 
 // DO NOT EDIT BELOW HERE
 
@@ -19,6 +60,7 @@ function playAlarm() {
 }
 
 function pauseAlarm() {
+  clearInterval(timer);
   audio.pause();
 }