/*
 * Copyright 2005-2011 the original author or authors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.wamblee.photos.wicket;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import javax.inject.Inject;

import org.apache.wicket.markup.html.form.Form;
import org.apache.wicket.markup.html.form.upload.FileUpload;
import org.apache.wicket.markup.html.form.upload.FileUploadField;
import org.apache.wicket.markup.html.panel.Panel;
import org.apache.wicket.util.lang.Bytes;
import org.wamblee.photos.model.Album;
import org.wamblee.photos.model.plumbing.AuthorizedPhotos;

/**
 * Created with IntelliJ IDEA.
 * User: erik
 * Date: 9/23/13
 * Time: 8:33 PM
 * To change this template use File | Settings | File Templates.
 */
public class UploadPanel extends Panel {

    private static final Logger LOGGER = Logger.getLogger(UploadPanel.class.getName());

    /**
     * Extension to use for JPEGs.
     */
    private static final String JPG_EXTENSION = ".jpg";

    /**
     * Extension to use for ZIP files.
     */
    private static final String ZIP_EXTENSION = ".zip";

    @Inject
    @AuthorizedPhotos
    private transient Album _authorized;

    private String _path;

    /**
     * Upload field.
     */
    private FileUploadField _uploadField;

    public UploadPanel(String aId, String aPath) {
        super(aId);

        _path = aPath;

        Form form = new Form("uploadForm") {
            protected void onSubmit() {
                final FileUpload upload = _uploadField.getFileUpload();

                if (upload == null) {
                    return;
                }

                try {
                    String filename = upload.getClientFileName();
                    InputStream is = upload.getInputStream();

                    if (filename.trim().length() == 0) {
                        return;
                    }
                    Album album = (Album) _authorized.getEntry(_path);
                    if (filename.toLowerCase().endsWith(JPG_EXTENSION)) {
                        insertPhoto(album, is, filename);
                    } else if (filename.toLowerCase().endsWith(ZIP_EXTENSION)) {

                        try (ZipInputStream zip = new ZipInputStream(is)) {
                            insertPhotosFromZipFile(album, zip);
                        }
                    } else {
                        warn("Skipping entry with unknown file type '" + filename + "'");
                    }
                }
                catch (Exception e) {
                    LOGGER.log(Level.WARNING, e.getMessage(), e);
                    error("ERROR:" + e.getMessage());
                }
            }
        };
        add(form);
        _uploadField = new FileUploadField("file");
        form.add(_uploadField);
        form.setMultiPart(true);
        form.setMaxSize(Bytes.megabytes(500));
    }

    private void insertPhotosFromZipFile(Album aAlbum, ZipInputStream aZipFile) throws IOException {
        // zip extension
        ZipEntry entry;
        while ((entry = aZipFile.getNextEntry()) != null) {
            try {
                if (!entry.isDirectory() && entry.getName().toLowerCase().endsWith(JPG_EXTENSION)) {
                    insertPhoto(aAlbum, aZipFile, new File(entry.getName()).getName());
                } else {
                    warn("Skipping entry '" + entry.getName() + "' from zip file.");
                }
            } finally {
                aZipFile.closeEntry();
            }
        }
    }

    private void insertPhoto(Album aAlbum, InputStream aPhotoInputStream, String aFilename) throws IOException {
        String photoName = aFilename.substring(0, aFilename.length() - JPG_EXTENSION.length());

        if (aAlbum.getEntry("/" + photoName) != null) {
            error("Photo '" + photoName + "' already exists in this album");
            return;
        }
        aAlbum.addImage(photoName, aPhotoInputStream);
        info("Photo '" + photoName + "' uploaded");
    }
}