`;
}
resultsDisplay.innerHTML = resultsHTML;
resultsSection.style.display = 'block';
resultsSection.scrollIntoView({ behavior: 'smooth' });
}
/**
* Generates and downloads a PDF report.
*/
async function generatePdf() {
const { jsPDF } = window.jspdf;
const doc = new jsPDF({ orientation: 'p', unit: 'mm', format: 'a4' });
const analysis = analyzeBalance();
const clientName = clientNameInput.value || 'N/A';
const trackingDate = trackingDateInput.value ? new Date(trackingDateInput.value).toLocaleDateString() : 'N/A';
const pageHeight = doc.internal.pageSize.height;
const pageWidth = doc.internal.pageSize.width;
const margin = 15;
let y = margin;
// 1. HEADER
doc.setFont('helvetica', 'bold');
doc.setFontSize(20);
doc.setTextColor(30, 41, 59);
doc.text('Electrolyte Balance Report', margin, y);
y += 15;
// 2. CLIENT INFO
doc.setFont('helvetica', 'bold');
doc.setFontSize(11);
doc.setTextColor(51, 65, 85);
doc.text('Client Name:', margin, y);
doc.setFont('helvetica', 'normal');
doc.text(clientName, margin + 30, y);
doc.setFont('helvetica', 'bold');
doc.text('Date:', pageWidth / 2 + 20, y);
doc.setFont('helvetica', 'normal');
doc.text(trackingDate, pageWidth / 2 + 35, y);
y += 10;
doc.setDrawColor(226, 232, 240);
doc.line(margin, y, pageWidth - margin, y);
y += 10;
// 3. RESULTS TABLE
const tableHeaders = ['Electrolyte', 'Your Intake', 'Recommended Range', 'Status'];
const colWidths = [30, 40, 50, 40];
// Draw table header
doc.setFillColor(243, 244, 246);
doc.rect(margin, y, pageWidth - 2 * margin, 10, 'F');
doc.setFont('helvetica', 'bold');
doc.setTextColor(55, 65, 81);
doc.setFontSize(10);
let currentX = margin + 5;
tableHeaders.forEach((header, i) => {
doc.text(header, currentX, y + 7);
currentX += colWidths[i];
});
y += 10;
// Draw table rows
doc.setFont('helvetica', 'normal');
doc.setFontSize(9);
for (const key in analysis) {
const item = analysis[key];
const rowData = [
key.charAt(0).toUpperCase() + key.slice(1),
`${item.value.toFixed(0)} ${item.rda.unit}`,
`${item.rda.min} - ${item.rda.max} ${item.rda.unit}`,
item.status
];
currentX = margin + 5;
rowData.forEach((text, i) => {
if (i === 3) { // Status column
if (item.status === 'Balanced') doc.setTextColor(22, 163, 74);
else if (item.status.includes('Low')) doc.setTextColor(217, 119, 6);
else doc.setTextColor(220, 38, 38);
} else {
doc.setTextColor(40, 40, 40);
}
doc.text(text, currentX, y + 7);
currentX += colWidths[i];
});
y += 10;
doc.setFont('helvetica', 'italic');
doc.setTextColor(107, 114, 128);
const recLines = doc.splitTextToSize(`Recommendation: ${item.recommendation}`, pageWidth - (margin * 2) - 10);
doc.text(recLines, margin + 5, y + 2);
y += recLines.length * 4 + 8;
if (y > pageHeight - 25) {
doc.addPage();
y = margin;
}
}
// 4. FOOTER
doc.setFontSize(8);
doc.setTextColor(148, 163, 184);
doc.text(`This report is for informational purposes only and is not a substitute for medical advice.`, margin, pageHeight - 15);
doc.text(`Consult a healthcare professional for personalized health guidance.`, margin, pageHeight - 10);
doc.save(`Electrolyte_Report_${clientName.replace(/ /g, '_')}.pdf`);
}
// --- EVENT LISTENERS ---
if(analyzeBtn) analyzeBtn.addEventListener('click', displayResults);
if(downloadPdfBtn) downloadPdfBtn.addEventListener('click', generatePdf);
// --- INITIALIZATION ---
trackingDateInput.valueAsDate = new Date(); // Set today's date
});
