import { showLoader, hideLoader, showAlert } from '../ui.js';
import { downloadFile } from '../utils/helpers.js';
import { state } from '../state.js';

export async function removeMetadata() {
    showLoader('Removing all metadata...');
    try {
        const infoDict = state.pdfDoc.getInfoDict();

        const allKeys = infoDict.keys();
        allKeys.forEach((key: any) => {
            infoDict.delete(key);
        });

        state.pdfDoc.setTitle('');
        state.pdfDoc.setAuthor('');
        state.pdfDoc.setSubject('');
        state.pdfDoc.setKeywords([]);
        state.pdfDoc.setCreator('');
        state.pdfDoc.setProducer('');

        const newPdfBytes = await state.pdfDoc.save();
        downloadFile(new Blob([newPdfBytes], { type: 'application/pdf' }), 'metadata-removed.pdf');
        
    } catch (e) {
        console.error(e);
        showAlert('Error', 'An error occurred while trying to remove metadata.');
    } finally {
        hideLoader();
    }
}