/**
 * Copyright (C) 2009 eXo Platform SAS.
 *
 * This 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 software 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.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.exoplatform.portal.webui.login;

import java.net.URLEncoder;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

import javax.servlet.http.HttpServletRequest;

import org.exoplatform.commons.utils.ListAccess;
import org.exoplatform.commons.utils.PageList;
import org.exoplatform.portal.application.PortalRequestContext;
import org.exoplatform.portal.webui.util.Util;
import org.exoplatform.services.mail.MailService;
import org.exoplatform.services.organization.OrganizationService;
import org.exoplatform.services.organization.Query;
import org.exoplatform.services.organization.User;
import org.exoplatform.services.organization.UserStatus;
import org.exoplatform.web.application.ApplicationMessage;
import org.exoplatform.web.security.security.RemindPasswordTokenService;
import org.exoplatform.webui.application.WebuiRequestContext;
import org.exoplatform.webui.config.annotation.ComponentConfig;
import org.exoplatform.webui.config.annotation.EventConfig;
import org.exoplatform.webui.core.lifecycle.UIFormLifecycle;
import org.exoplatform.webui.event.Event;
import org.exoplatform.webui.event.Event.Phase;
import org.exoplatform.webui.event.EventListener;
import org.exoplatform.webui.form.UIForm;
import org.exoplatform.webui.form.UIFormStringInput;
import org.exoplatform.webui.form.validator.MandatoryValidator;
import org.exoplatform.webui.form.validator.UserConfigurableValidator;
import org.exoplatform.webui.url.ComponentURL;
import org.gatein.common.logging.Logger;
import org.gatein.common.logging.LoggerFactory;
import org.gatein.wci.security.Credentials;

/**
 * Created by The eXo Platform SARL Author : dang.tung tungcnw@gmail.com Jul 09, 2008
 */
@ComponentConfig(lifecycle = UIFormLifecycle.class, template = "system:/groovy/webui/form/UIFormWithTitle.gtmpl", events = {
        @EventConfig(listeners = UIForgetPassword.SendActionListener.class),
        @EventConfig(phase = Phase.DECODE, listeners = UIForgetPassword.BackActionListener.class) })
public class UIForgetPassword extends UIForm {
    static final String Username = "username";

    static final String Email = "email";

    public UIForgetPassword() throws Exception {
        addUIFormInput(new UIFormStringInput(Username, null).addValidator(MandatoryValidator.class)).addUIFormInput(
                new UIFormStringInput(Email, null).addValidator(MandatoryValidator.class).addValidator(
                        UserConfigurableValidator.class, UserConfigurableValidator.EMAIL));
    }

    public static class SendActionListener extends EventListener<UIForgetPassword> {
        private final Logger log = LoggerFactory.getLogger(SendActionListener.class);

        public void execute(Event<UIForgetPassword> event) throws Exception {
            UIForgetPassword uiForm = event.getSource();
            UILogin uilogin = uiForm.getParent();
            WebuiRequestContext requestContext = event.getRequestContext();
            PortalRequestContext portalContext = PortalRequestContext.getCurrentInstance();
            MailService mailSrc = uiForm.getApplicationComponent(MailService.class);
            OrganizationService orgSrc = uiForm.getApplicationComponent(OrganizationService.class);
            String userName = uiForm.getUIStringInput(Username).getValue();
            String email = uiForm.getUIStringInput(Email).getValue();
            uiForm.reset();

            User user = null;

            String tokenId = null;

            // User provided his username
            if (userName != null) {
                user = orgSrc.getUserHandler().findUserByName(userName, UserStatus.ANY);
                if (user == null) {
                    requestContext.getUIApplication().addMessage(
                            new ApplicationMessage("UIForgetPassword.msg.user-not-exist", null));
                    return;
                } else if (!user.isEnabled()) {
                    requestContext.getUIApplication().addMessage(
                            new ApplicationMessage("UIForgetPassword.msg.user-is-disabled", null));
                    return;
                }
            }

            // User provided his email address
            if (user == null && email != null) {
                Query query = new Query();
                // Querying on email won't work. PLIDM-12
                // Note that querying on email is inefficient as it loops over all users...
                query.setEmail(email);
                ListAccess<User> users = orgSrc.getUserHandler().findUsersByQuery(query, UserStatus.ANY);
                if (users == null || users.getSize() == 0) {
                    requestContext.getUIApplication().addMessage(
                            new ApplicationMessage("UIForgetPassword.msg.email-not-exist", null));
                    return;
                } else if (users.getSize() == 1) {
                    user = users.load(0, 1)[0];
                    if (!user.isEnabled()) {
                        requestContext.getUIApplication().addMessage(
                                new ApplicationMessage("UIForgetPassword.msg.user-is-disabled", null));
                        return;
                    }
                }
            }

            email = user.getEmail();

            // Create token
            RemindPasswordTokenService tokenService = uiForm.getApplicationComponent(RemindPasswordTokenService.class);
            Credentials credentials = new Credentials(user.getUserName(), "");
            tokenId = tokenService.createToken(credentials,tokenService.FORGOT_PASSWORD_TOKEN);

            String portalName = URLEncoder.encode(Util.getUIPortal().getName(), "UTF-8");

            ResourceBundle res = requestContext.getApplicationResourceBundle();
            String headerMail = "headermail";
            String footerMail = "footer";
            try {
                headerMail = res.getString(uiForm.getId() + ".mail.header") + "\n\n"
                        + res.getString(uiForm.getId() + ".mail.user") + user.getUserName() + "\n"
                        + res.getString(uiForm.getId() + ".mail.link");
                footerMail = "\n\n\n" + res.getString(uiForm.getId() + ".mail.footer");
            } catch (MissingResourceException e) {
                log.error(e.getMessage(), e);
            }
            HttpServletRequest request = portalContext.getRequest();
            String host = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort();
            String activeLink = host + requestContext.getRequestContextPath() + "/public/" + portalName + "?"
                    + ComponentURL.PORTAL_COMPONENT_ID + "=UIPortal&portal:action=RecoveryPasswordAndUsername&tokenId="
                    + tokenId;
            String mailText = headerMail + "\n" + activeLink + footerMail;
            try {
                mailSrc.sendMessage(res.getString("UIForgetPassword.mail.from"), email,
                        res.getString("UIForgetPassword.mail.subject"), mailText);
            } catch (Exception e) {
                requestContext.getUIApplication().addMessage(
                        new ApplicationMessage("UIForgetPassword.msg.send-mail-fail", null));
                requestContext.addUIComponentToUpdateByAjax(uilogin);

                return;
            }

            uilogin.getChild(UILoginForm.class).setRendered(true);
            uilogin.getChild(UIForgetPasswordWizard.class).setRendered(false);
            uilogin.getChild(UIForgetPassword.class).setRendered(false);
            requestContext.getUIApplication()
                    .addMessage(new ApplicationMessage("UIForgetPassword.msg.send-mail-success", null));
            requestContext.addUIComponentToUpdateByAjax(uilogin);
        }
    }

    public static class BackActionListener extends EventListener<UIForgetPassword> {
        public void execute(Event<UIForgetPassword> event) throws Exception {
            UILogin uilogin = event.getSource().getParent();
            uilogin.getChild(UILoginForm.class).setRendered(false);
            uilogin.getChild(UIForgetPasswordWizard.class).setRendered(true);
            uilogin.getChild(UIForgetPassword.class).setRendered(false);
            event.getSource().reset();
            event.getRequestContext().addUIComponentToUpdateByAjax(uilogin);
        }
    }
}
