`).join('');
};
// --- EVENT HANDLERS ---
document.getElementById('task-form').addEventListener('submit', e => {
e.preventDefault();
const id = document.getElementById('task-id').value;
const newTask = {
title: document.getElementById('task-title').value,
dueDate: document.getElementById('task-due-date').value,
priority: document.getElementById('task-priority').value,
status: document.getElementById('task-status').value,
};
if (id) {
const index = tasks.findIndex(t => t.id == id);
tasks[index] = { ...tasks[index], ...newTask };
} else {
newTask.id = tasks.length > 0 ? Math.max(...tasks.map(t => t.id)) + 1 : 1;
tasks.push(newTask);
}
resetForm();
renderAll();
});
document.getElementById('task-list-editor').addEventListener('click', e => {
if (e.target.classList.contains('edit-btn')) {
const id = e.target.dataset.id;
const task = tasks.find(t => t.id == id);
if (task) populateFormForEdit(task);
}
if (e.target.classList.contains('delete-btn')) {
const id = e.target.dataset.id;
if (confirm('Are you sure you want to delete this task?')) {
tasks = tasks.filter(t => t.id != id);
renderAll();
}
}
});
document.getElementById('cancel-edit-btn').addEventListener('click', resetForm);
document.getElementById('download-pdf-btn').addEventListener('click', () => {
const exportArea = document.getElementById('dashboard-export-area');
const mainTitleEl = document.querySelector('#todo-tool-container h1');
if (!exportArea || !mainTitleEl) return;
const btn = document.getElementById('download-pdf-btn');
const originalBtnText = btn.innerHTML;
btn.disabled = true;
btn.innerHTML = `
Processing...`;
html2canvas(exportArea, { scale: 2, useCORS: true, windowWidth: exportArea.scrollWidth, windowHeight: exportArea.scrollHeight })
.then(canvas => {
const { jsPDF } = window.jspdf;
const imgData = canvas.toDataURL('image/png');
const pdf = new jsPDF({ orientation: 'landscape', unit: 'mm', format: 'a4' });
const pageMargin = 15;
const pdfPageWidth = pdf.internal.pageSize.getWidth();
const pdfPageHeight = pdf.internal.pageSize.getHeight();
const pdfContentWidth = pdfPageWidth - (2 * pageMargin);
const canvasAspectRatio = canvas.width / canvas.height;
const pdfImgHeight = pdfContentWidth / canvasAspectRatio;
let yPos = pageMargin;
pdf.setFontSize(18).setFont('helvetica', 'bold');
pdf.text(mainTitleEl.innerText, pdfPageWidth / 2, yPos, { align: 'center' });
yPos += 12;
let heightLeft = pdfImgHeight;
let positionOnCanvas = 0;
pdf.addImage(imgData, 'PNG', pageMargin, yPos, pdfContentWidth, pdfImgHeight);
heightLeft -= (pdfPageHeight - yPos - pageMargin);
while (heightLeft > 0) {
positionOnCanvas -= (pdfPageHeight - (2 * pageMargin));
pdf.addPage();
pdf.addImage(imgData, 'PNG', pageMargin, positionOnCanvas + pageMargin, pdfContentWidth, pdfImgHeight);
heightLeft -= (pdfPageHeight - (2 * pageMargin));
}
pdf.save(`todo-list-dashboard-${new Date().toISOString().slice(0,10)}.pdf`);
})
.catch(err => { console.error("PDF generation failed:", err); alert("Error generating PDF."); })
.finally(() => {
btn.disabled = false;
btn.innerHTML = originalBtnText;
});
});
// --- HELPER FUNCTIONS ---
function populateFormForEdit(task) {
document.getElementById('task-id').value = task.id;
document.getElementById('task-title').value = task.title;
document.getElementById('task-due-date').value = task.dueDate;
document.getElementById('task-priority').value = task.priority;
// If status was 'Overdue', let user select a new, valid status
document.getElementById('task-status').value = task.status === 'Overdue' ? 'To Do' : task.status;
document.getElementById('task-form').querySelector('button[type="submit"]').textContent = 'Update Task';
document.getElementById('cancel-edit-btn').classList.remove('hidden');
document.getElementById('task-form').scrollIntoView({ behavior: 'smooth' });
}
function resetForm() {
document.getElementById('task-form').reset();
document.getElementById('task-id').value = '';
document.getElementById('task-form').querySelector('button[type="submit"]').textContent = 'Add Task';
document.getElementById('cancel-edit-btn').classList.add('hidden');
}
// --- INITIALIZATION ---
const switchTab = (tabName) => {
const tabDashboardBtn = document.getElementById('tab-dashboard-btn');
const tabConfigBtn = document.getElementById('tab-config-btn');
const tabDashboardContent = document.getElementById('tab-dashboard-content');
const tabConfigContent = document.getElementById('tab-config-content');
const prevTabBtn = document.getElementById('prev-tab-btn');
const nextTabBtn = document.getElementById('next-tab-btn');
if (tabName === 'dashboard') {
tabDashboardBtn.classList.add('active');
tabConfigBtn.classList.remove('active');
tabDashboardContent.classList.remove('hidden');
tabConfigContent.classList.add('hidden');
prevTabBtn.disabled = true;
nextTabBtn.disabled = false;
} else {
tabDashboardBtn.classList.remove('active');
tabConfigBtn.classList.add('active');
tabDashboardContent.classList.add('hidden');
tabConfigContent.classList.remove('hidden');
prevTabBtn.disabled = false;
nextTabBtn.disabled = true;
}
};
document.getElementById('tab-dashboard-btn').addEventListener('click', () => switchTab('dashboard'));
document.getElementById('tab-config-btn').addEventListener('click', () => switchTab('config'));
document.getElementById('prev-tab-btn').addEventListener('click', () => switchTab('dashboard'));
document.getElementById('next-tab-btn').addEventListener('click', () => switchTab('config'));
switchTab('dashboard');
renderAll();
});
