/*
 * Copyright 2015 gitblit.com.
 *
 * 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 com.gitblit.wicket.pages;

import java.text.DateFormat;
import java.text.MessageFormat;
import java.text.SimpleDateFormat;
import java.util.List;

import org.apache.commons.io.FileUtils;
import org.apache.wicket.Component;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.link.BookmarkablePageLink;
import org.apache.wicket.markup.repeater.Item;
import org.apache.wicket.markup.repeater.data.DataView;
import org.apache.wicket.markup.repeater.data.ListDataProvider;

import com.gitblit.Constants;
import com.gitblit.models.FilestoreModel;
import com.gitblit.models.UserModel;
import com.gitblit.wicket.FilestoreUI;
import com.gitblit.wicket.RequiresAdminRole;
import com.gitblit.wicket.WicketUtils;

/**
 * Page to display the current status of the filestore.
 * Certain errors also displayed to aid in fault finding
 *
 * @author Paul Martin
 */
@RequiresAdminRole
public class FilestorePage extends RootPage {

	public FilestorePage() {
		super();
		setupPage("", "");

		final List<FilestoreModel> files = app().filestore().getAllObjects();
		final long nBytesUsed = app().filestore().getFilestoreUsedByteCount();
		final long nBytesAvailable = app().filestore().getFilestoreAvailableByteCount();

		String message = MessageFormat.format(getString("gb.filestoreStats"), files.size(),
				FileUtils.byteCountToDisplaySize(nBytesUsed), FileUtils.byteCountToDisplaySize(nBytesAvailable) );

		Component repositoriesMessage = new Label("repositoriesMessage", message)
				.setEscapeModelStrings(false).setVisible(message.length() > 0);

		add(repositoriesMessage);

		BookmarkablePageLink<Void> helpLink = new BookmarkablePageLink<Void>("filestoreHelp", FilestoreUsage.class);
		helpLink.add(new Label("helpMessage", getString("gb.filestoreHelp")));
		add(helpLink);


		DataView<FilestoreModel> filesView = new DataView<FilestoreModel>("fileRow",
				new ListDataProvider<FilestoreModel>(files)) {
			private static final long serialVersionUID = 1L;
			private int counter;

			@Override
			protected void onBeforeRender() {
				super.onBeforeRender();
				counter = 0;
			}

			@Override
			public void populateItem(final Item<FilestoreModel> item) {
				final FilestoreModel entry = item.getModelObject();

				DateFormat dateFormater = new SimpleDateFormat(Constants.ISO8601);

				UserModel user = app().users().getUserModel(entry.getChangedBy());
				user = user == null ? UserModel.ANONYMOUS : user;

				Label icon = FilestoreUI.getStatusIcon("status", entry);
				item.add(icon);
				item.add(new Label("on", dateFormater.format(entry.getChangedOn())));
				item.add(new Label("by", user.getDisplayName()));

				item.add(new Label("oid", entry.oid));
				item.add(new Label("size", FileUtils.byteCountToDisplaySize(entry.getSize())));

				WicketUtils.setAlternatingBackground(item, counter);
				counter++;
			}

		};

		add(filesView);
	}
}