package com.alexanderlogistics;

import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.List;
import java.util.logging.Logger;

import org.imixs.archive.core.SnapshotService;
import org.imixs.workflow.FileData;
import org.imixs.workflow.ItemCollection;
import org.imixs.workflow.SignalAdapter;
import org.imixs.workflow.exceptions.AdapterException;
import org.imixs.workflow.exceptions.PluginException;

import jakarta.inject.Inject;

/**
 * Der RenameFilenamesAdapter kann optional eingesetzt werden. Dieser Adapter
 * verändert den Dateinamen von angehangenen Rechnungen
 *
 * Der Adapter wir beispielweise in DWC eingesetzt bevor die Dateien in einen
 * FTP Server hochgeladen werden.
 *
 * Die Dateinamen werden vom System berechnet.
 *
 * sequencenumber + "_" +invoice.positions+".pdf"
 *
 *
 * Bei Sachrechnungen
 *
 * sequencenumber + "_" + invoice.number.stripped + ".pdf" wird das
 * Rechnungsdatum verwendet um die Buchungsperiode zu berechnen.
 *
 *
 *
 * @author rsoika
 * @version 1.0
 *
 */
public class RenameFilenamesAdapter implements SignalAdapter {

    private static Logger logger = Logger.getLogger(RenameFilenamesAdapter.class.getName());

    @Inject
    SnapshotService snapshotService;

    /**
     * Rename Filenames
     *
     * @throws PluginException
     *
     **/
    @Override
    public ItemCollection execute(ItemCollection workitem, ItemCollection event)
            throws AdapterException, PluginException {

        int fileNameCounter = 0; // for multiple files
        List<FileData> fileDataSet = workitem.getFileData();
        for (FileData fileData : fileDataSet) {
            String fileName = fileData.getName();
            // only PDF files and X-Rechnung
            if ((fileName.toLowerCase().endsWith(".pdf") || fileName.toLowerCase().endsWith(".xml"))) {

                // Build new Filename
                String newFileName = buildFileName(fileName, workitem, fileNameCounter);
                if (!newFileName.equals(fileName)) {
                    logger.info("Rename file name " + fileName + " -> " + newFileName);
                    // do we have content
                    if (fileData.getContent().length < 10) {
                        // fetch snaphot data
                        FileData snapShotFileData = snapshotService.getWorkItemFile(workitem.getUniqueID(), fileName);
                        // remove old data
                        workitem.removeFile(fileName);
                        snapShotFileData.setName(newFileName);
                        workitem.addFileData(snapShotFileData);
                    } else {
                        fileData.setName(newFileName);
                    }
                    fileNameCounter++;
                }

                // Update FTP Target path information
                String targetPath = "";
                if (InvoiceUtil.isCreditorInvoice(workitem)) {
                    targetPath = "invoice-in/";
                    String bookingPath = workitem.getItemValueString("invoice.period");
                    // Sachrechnung
                    if (bookingPath.isEmpty()) {
                        // build period from invoice.date
                        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyyMM");
                        LocalDate invoiceDate = workitem.getItemValueLocalDate("invoice.date");
                        bookingPath = invoiceDate.format(formatter);
                    }
                    if (bookingPath.length() > 4) {
                        targetPath = targetPath + bookingPath.substring(0, 4) + "/" + bookingPath.substring(4);
                    }
                } else {
                    targetPath = "invoice-out/";
                    String bookingPath = workitem.getItemValueString("invoice.bookingperiod");
                    targetPath = targetPath + bookingPath.substring(0, 4) + "/" + bookingPath.substring(4);
                }

                workitem.setItemValue("ftp.target.path", targetPath + "/");
            }

        }

        return workitem;
    }

    /**
     * Baut einen Filenamen aus verschiedenen Attributen zusammen.
     *
     *
     * @param workitem
     * @return
     */
    private String buildFileName(String fileName, ItemCollection workitem, int counter) {
        String result = workitem.getItemValueString("sequencenumber") + "_";

        if (InvoiceUtil.isSachrechnung(workitem)) {
            result = result + workitem.getItemValueString("invoice.number.stripped");
        } else {
            // für ausgangsrechnungen skippen wir die Cargosoft XML Datei
            if (fileName.toLowerCase().endsWith(".xml")) {
                return fileName;
            }
            // für die PDF Datei bauen wir einen neuen Namen
            result = result + workitem.getItemValueString("invoice.positions");
        }
        if (counter > 0) {
            result = result + "_" + counter;
        }
        result = result + fileName.substring(fileName.lastIndexOf("."));

        return result;
    }
}