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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.document.library.web.internal.display.context;

import com.liferay.document.library.display.context.DLMimeTypeDisplayContext;
import com.liferay.document.library.display.context.DLViewFileVersionDisplayContext;
import com.liferay.document.library.kernel.model.DLFileEntryConstants;
import com.liferay.document.library.kernel.model.DLFileEntryMetadata;
import com.liferay.document.library.kernel.model.DLFileVersion;
import com.liferay.document.library.kernel.service.DLFileEntryMetadataLocalServiceUtil;
import com.liferay.document.library.kernel.util.AudioProcessorUtil;
import com.liferay.document.library.kernel.util.ImageProcessorUtil;
import com.liferay.document.library.kernel.util.PDFProcessorUtil;
import com.liferay.document.library.kernel.util.VideoProcessorUtil;
import com.liferay.document.library.web.internal.display.context.logic.DLPortletInstanceSettingsHelper;
import com.liferay.document.library.web.internal.display.context.logic.FileEntryDisplayContextHelper;
import com.liferay.document.library.web.internal.display.context.logic.FileVersionDisplayContextHelper;
import com.liferay.document.library.web.internal.display.context.logic.UIItemsBuilder;
import com.liferay.document.library.web.internal.display.context.util.DLRequestHelper;
import com.liferay.document.library.web.internal.display.context.util.JSPRenderer;
import com.liferay.dynamic.data.mapping.exception.StorageException;
import com.liferay.dynamic.data.mapping.kernel.DDMStructure;
import com.liferay.dynamic.data.mapping.storage.DDMFormValues;
import com.liferay.dynamic.data.mapping.storage.StorageEngine;
import com.liferay.portal.kernel.exception.PortalException;
import com.liferay.portal.kernel.exception.SystemException;
import com.liferay.portal.kernel.language.LanguageUtil;
import com.liferay.portal.kernel.repository.model.FileEntry;
import com.liferay.portal.kernel.repository.model.FileShortcut;
import com.liferay.portal.kernel.repository.model.FileVersion;
import com.liferay.portal.kernel.servlet.taglib.ui.Menu;
import com.liferay.portal.kernel.servlet.taglib.ui.MenuItem;
import com.liferay.portal.kernel.servlet.taglib.ui.ToolbarItem;
import com.liferay.portal.kernel.util.ResourceBundleLoader;
import com.liferay.portal.kernel.util.WebKeys;

import java.io.IOException;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Locale;
import java.util.ResourceBundle;
import java.util.UUID;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @author Adolfo Pérez
 */
public class DefaultDLViewFileVersionDisplayContext
	implements DLViewFileVersionDisplayContext {

	public DefaultDLViewFileVersionDisplayContext(
			HttpServletRequest request, HttpServletResponse response,
			FileShortcut fileShortcut,
			DLMimeTypeDisplayContext dlMimeTypeDisplayContext,
			ResourceBundleLoader resourceBundleLoader,
			StorageEngine storageEngine)
		throws PortalException {

		this(
			request, fileShortcut.getFileVersion(), fileShortcut,
			dlMimeTypeDisplayContext, resourceBundleLoader, storageEngine);
	}

	public DefaultDLViewFileVersionDisplayContext(
		HttpServletRequest request, HttpServletResponse response,
		FileVersion fileVersion,
		DLMimeTypeDisplayContext dlMimeTypeDisplayContext,
		ResourceBundleLoader resourceBundleLoader,
		StorageEngine storageEngine) {

		this(
			request, fileVersion, null, dlMimeTypeDisplayContext,
			resourceBundleLoader, storageEngine);
	}

	@Override
	public String getCssClassFileMimeType() {
		if (_dlMimeTypeDisplayContext == null) {
			return "file-icon-color-0";
		}

		return _dlMimeTypeDisplayContext.getCssClassFileMimeType(
			_fileVersion.getMimeType());
	}

	@Override
	public DDMFormValues getDDMFormValues(DDMStructure ddmStructure)
		throws PortalException {

		DLFileEntryMetadata dlFileEntryMetadata =
			DLFileEntryMetadataLocalServiceUtil.getFileEntryMetadata(
				ddmStructure.getStructureId(), _fileVersion.getFileVersionId());

		return _storageEngine.getDDMFormValues(
			dlFileEntryMetadata.getDDMStorageId());
	}

	@Override
	public DDMFormValues getDDMFormValues(long classPK)
		throws StorageException {

		return _storageEngine.getDDMFormValues(classPK);
	}

	@Override
	public List getDDMStructures() throws PortalException {
		if (_ddmStructures != null) {
			return _ddmStructures;
		}

		if (_fileVersionDisplayContextHelper.isDLFileVersion()) {
			DLFileVersion dlFileVersion =
				(DLFileVersion)_fileVersion.getModel();

			_ddmStructures = dlFileVersion.getDDMStructures();
		}
		else {
			_ddmStructures = Collections.emptyList();
		}

		return _ddmStructures;
	}

	@Override
	public int getDDMStructuresCount() throws PortalException {
		List ddmStructures = getDDMStructures();

		return ddmStructures.size();
	}

	@Override
	public String getDiscussionClassName() {
		return DLFileEntryConstants.getClassName();
	}

	@Override
	public long getDiscussionClassPK() {
		return _fileVersion.getFileEntryId();
	}

	@Override
	public String getDiscussionLabel(Locale locale) {
		ResourceBundle resourceBundle =
			_resourceBundleLoader.loadResourceBundle(
				LanguageUtil.getLanguageId(locale));

		return LanguageUtil.get(resourceBundle, "comments");
	}

	@Override
	public Menu getMenu() throws PortalException {
		Menu menu = new Menu();

		menu.setDirection("left-side");
		menu.setMarkupView("lexicon");
		menu.setMenuItems(_getMenuItems());
		menu.setScroll(false);
		menu.setShowWhenSingleIcon(true);

		return menu;
	}

	@Override
	public List getToolbarItems() throws PortalException {
		List toolbarItems = new ArrayList<>();

		_uiItemsBuilder.addDownloadToolbarItem(toolbarItems);

		_uiItemsBuilder.addOpenInMsOfficeToolbarItem(toolbarItems);

		_uiItemsBuilder.addEditToolbarItem(toolbarItems);

		_uiItemsBuilder.addMoveToolbarItem(toolbarItems);

		_uiItemsBuilder.addCheckoutToolbarItem(toolbarItems);

		_uiItemsBuilder.addCancelCheckoutToolbarItem(toolbarItems);

		_uiItemsBuilder.addCheckinToolbarItem(toolbarItems);

		_uiItemsBuilder.addPermissionsToolbarItem(toolbarItems);

		_uiItemsBuilder.addMoveToTheRecycleBinToolbarItem(toolbarItems);

		_uiItemsBuilder.addDeleteToolbarItem(toolbarItems);

		return toolbarItems;
	}

	@Override
	public UUID getUuid() {
		return _UUID;
	}

	@Override
	public boolean hasPreview() {
		if (AudioProcessorUtil.hasAudio(_fileVersion) ||
			ImageProcessorUtil.hasImages(_fileVersion) ||
			PDFProcessorUtil.hasImages(_fileVersion) ||
			VideoProcessorUtil.hasVideo(_fileVersion)) {

			return true;
		}

		return false;
	}

	@Override
	public boolean isDownloadLinkVisible() throws PortalException {
		return _fileEntryDisplayContextHelper.isDownloadActionAvailable();
	}

	@Override
	public boolean isVersionInfoVisible() {
		return true;
	}

	@Override
	public void renderPreview(
			HttpServletRequest request, HttpServletResponse response)
		throws IOException, ServletException {

		JSPRenderer jspRenderer = new JSPRenderer(
			"/document_library/view_file_entry_preview.jsp");

		jspRenderer.setAttribute(
			WebKeys.DOCUMENT_LIBRARY_FILE_VERSION, _fileVersion);

		jspRenderer.render(request, response);
	}

	private DefaultDLViewFileVersionDisplayContext(
		HttpServletRequest request, FileVersion fileVersion,
		FileShortcut fileShortcut,
		DLMimeTypeDisplayContext dlMimeTypeDisplayContext,
		ResourceBundleLoader resourceBundleLoader,
		StorageEngine storageEngine) {

		try {
			_fileVersion = fileVersion;
			_dlMimeTypeDisplayContext = dlMimeTypeDisplayContext;
			_resourceBundleLoader = resourceBundleLoader;
			_storageEngine = storageEngine;

			DLRequestHelper dlRequestHelper = new DLRequestHelper(request);

			_dlPortletInstanceSettingsHelper =
				new DLPortletInstanceSettingsHelper(dlRequestHelper);

			_fileEntryDisplayContextHelper = new FileEntryDisplayContextHelper(
				dlRequestHelper.getPermissionChecker(),
				_getFileEntry(fileVersion));

			_fileVersionDisplayContextHelper =
				new FileVersionDisplayContextHelper(fileVersion);

			if (fileShortcut == null) {
				_uiItemsBuilder = new UIItemsBuilder(request, fileVersion);
			}
			else {
				_uiItemsBuilder = new UIItemsBuilder(request, fileShortcut);
			}
		}
		catch (PortalException pe) {
			throw new SystemException(
				"Unable to build DefaultDLViewFileVersionDisplayContext for " +
					fileVersion,
				pe);
		}
	}

	private FileEntry _getFileEntry(FileVersion fileVersion)
		throws PortalException {

		if (fileVersion != null) {
			return fileVersion.getFileEntry();
		}

		return null;
	}

	private List _getMenuItems() throws PortalException {
		List menuItems = new ArrayList<>();

		if (_dlPortletInstanceSettingsHelper.isShowActions()) {
			_uiItemsBuilder.addDownloadMenuItem(menuItems);

			_uiItemsBuilder.addOpenInMsOfficeMenuItem(menuItems);

			_uiItemsBuilder.addViewOriginalFileMenuItem(menuItems);

			_uiItemsBuilder.addEditMenuItem(menuItems);

			_uiItemsBuilder.addMoveMenuItem(menuItems);

			_uiItemsBuilder.addCheckoutMenuItem(menuItems);

			_uiItemsBuilder.addCheckinMenuItem(menuItems);

			_uiItemsBuilder.addCancelCheckoutMenuItem(menuItems);

			_uiItemsBuilder.addPermissionsMenuItem(menuItems);

			_uiItemsBuilder.addDeleteMenuItem(menuItems);
		}

		return menuItems;
	}

	private static final UUID _UUID = UUID.fromString(
		"85F6C50E-3893-4E32-9D63-208528A503FA");

	private List _ddmStructures;
	private final DLMimeTypeDisplayContext _dlMimeTypeDisplayContext;
	private final DLPortletInstanceSettingsHelper
		_dlPortletInstanceSettingsHelper;
	private final FileEntryDisplayContextHelper _fileEntryDisplayContextHelper;
	private final FileVersion _fileVersion;
	private final FileVersionDisplayContextHelper
		_fileVersionDisplayContextHelper;
	private final ResourceBundleLoader _resourceBundleLoader;
	private final StorageEngine _storageEngine;
	private final UIItemsBuilder _uiItemsBuilder;

}