export const getPdfsByTeacher = async (req, res) => {
  try {
    const { email } = req.params;
    console.log('Searching PDFs for email:', email);

    if (!email) {
      return res.status(400).json({ error: 'Email is required' });
    }

    const pdfs = await Pdf.find({ email })
      .select('_id email userName originalPdfUrl processedPdfUrl images createdAt updatedAt status')
      .sort({ createdAt: -1 });

    console.log('Found PDFs:', pdfs.length);
    
    res.json({
      message: 'PDFs retrieved successfully',
      count: pdfs.length,
      pdfs: pdfs.map(pdf => ({
        id: pdf._id,
        email: pdf.email,
        userName: pdf.userName,
        originalPdfUrl: pdf.originalPdfUrl,
        processedPdfUrl: pdf.processedPdfUrl,
        images: pdf.images,
        totalPages: pdf.images.length,
        createdAt: pdf.createdAt,
        updatedAt: pdf.updatedAt,
        status: pdf.processedPdfUrl ? 'processed' : 'pending'
      }))
    });
  } catch (error) {
    console.error('Get PDFs by teacher error:', error);
    res.status(500).json({ error: 'Failed to retrieve PDFs: ' + error.message });
  }
};