script.js

// Subject Management
function addSubject() {
  const input = document.getElementById("subjectInput");
  const subject = input.value.trim();
  if (subject) {
    const li = document.createElement("li");
    li.textContent = subject;
    const delBtn = document.createElement("button");
    delBtn.textContent = "❌";
    delBtn.onclick = () => li.remove();
    li.appendChild(delBtn);
    document.getElementById("subjectList").appendChild(li);
    input.value = "";
  }
}

// Pomodoro Timer
let timer;
let timeLeft = 25 * 60;

function updateTimerDisplay() {
  const minutes = Math.floor(timeLeft / 60);
  const seconds = timeLeft % 60;
  document.getElementById("timer").textContent =
    `${minutes.toString().padStart(2, "0")}:${seconds.toString().padStart(2, "0")}`;
}

function startTimer() {
  if (!timer) {
    timer = setInterval(() => {
      if (timeLeft > 0) {
        timeLeft--;
        updateTimerDisplay();
      } else {
        clearInterval(timer);
        timer = null;
        alert("Time's up!");
      }
    }, 1000);
  }
}

function resetTimer() {
  clearInterval(timer);
  timer = null;
  timeLeft = 25 * 60;
  updateTimerDisplay();
}

// Weekly Schedule Grid
window.onload = function () {
  const days = ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"];
  const grid = document.getElementById("scheduleGrid");

  if (grid) {
    days.forEach(day => {
      const cell = document.createElement("div");
      cell.classList.add("day-cell");
      cell.innerHTML = `<strong>${day}</strong><br><span class="editable">Click to add subject</span>`;
      
      // ✅ Add click behavior
      cell.onclick = () => {
        const subject = prompt(`Enter subject for ${day}:`);
        if (subject) {
          cell.querySelector(".editable").textContent = subject;
        }
      };

      grid.appendChild(cell);
    });
  }
};


// Theme Toggle
document.getElementById("themeToggle").onclick = () => {
  document.body.classList.toggle("dark-mode");
};