const PDFDocument = require('pdfkit');
const { spawn } = require('child_process');


module.exports = {
	generateFile(username, studentId, req, res) {
		// Create the output text
		const infoArray = [
			'Username:',
			`${username}`,
			'',
			'Email:',
			`${username}@kvcc.me.edu`,
			'',
			'Student ID:',
			`${studentId}`,
			'',
			'Note: When signing into the MyKV Portal, use your Username not your Email.',
			'',
			'For further assistance contact ithelp@mainecc.edu'
		];
		const infoString = infoArray.join('\n');
		// Create a new PDF document in-memory
		const doc = new PDFDocument({
			size: [204, 400],
			margin: 5
		});
		
		// Store the PDF in a buffer
		let buffers = [];
		doc.on('data', buffers.push.bind(buffers));
		doc.on('end', () => {
			// Combine all the chunks into a single buffer
			const pdfData = Buffer.concat(buffers);
			
			// Set the response headers to serve the PDF file
			res.writeHead(200, {
				'Content-Type': 'application/pdf',
				'Content-Disposition': 'inline; filename="output.pdf"', // Or 'attachment' for download
				'Content-Length': pdfData.length,
			});
			
			// Send the PDF file as the response
			res.end(pdfData);
			
			// Print the PDF using lp command
			const printer = spawn('lp', ['-d', 'ITThermal']); // Replace 'printer_name' with your actual printer name
			
			// Handle error if the printing process fails
			printer.on('error', (err) => {
				console.error('Failed to start printing process:', err);
				res.status(500).send('Failed to start printing process');
			});
			
			// Pipe the PDF data to the printer
			printer.stdin.write(pdfData);
			printer.stdin.end();
			
			// Handle the process exit event
			printer.on('close', (code) => {
				if (code === 0) {
					res.send('PDF sent to printer successfully.');
				} else {
					res.status(500).send('Failed to print PDF');
				}
			});
		});
		
		// Add content (image, text) to the PDF
		doc.image('./public/itslogo.jpg', {
			fit: [196, 100],
			align: 'center',
			valign: 'top',
		});
		
		doc.moveDown();
		doc.moveDown();
		doc.moveDown();
		doc.moveDown();
		doc.moveDown();
		doc.moveDown();
		doc.moveDown();
		doc.fontSize(12).text(infoString, {
			align: 'left',
		});
		
		// Finalize the PDF
		doc.end();
	},
	generatePdf() {
		
	}
}