/*
 * Juick
 * Copyright (C) 2008-2013, Ugnich Anton
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.juick.www;

import com.juick.server.CrosspostQueries;
import com.juick.server.SubscriptionsQueries;
import com.juick.server.TagQueries;
import com.juick.server.UserQueries;
import com.juick.server.helpers.NotifyOpts;
import com.juick.server.helpers.UserInfo;
import com.mitchellbosecke.pebble.error.PebbleException;
import com.mitchellbosecke.pebble.template.PebbleTemplate;
import org.apache.commons.lang3.StringUtils;
import org.springframework.dao.EmptyResultDataAccessException;
import org.springframework.jdbc.core.JdbcTemplate;

import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

/**
 *
 * @author Ugnich Anton
 */
public class Settings {
    private static final Logger logger = Logger.getLogger(Settings.class.getName());

    protected void doGet(JdbcTemplate sql, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException, PebbleException {
        com.juick.User visitor = Utils.getVisitorUser(sql, request, response);
        if (visitor.getUID() == 0) {
            response.sendRedirect("/login");
        }
        List<String> pages = Arrays.asList("main", "password", "about", "auth-email", "privacy");
        String page = request.getParameter("page");
        if (StringUtils.isEmpty(page) || !pages.contains(page)) {
            page = "main";
        }

        response.setContentType("text/html; charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            PebbleTemplate template = Utils.getEngine().getTemplate(String.format("views/settings_%s.html", page));
            Map<String, Object> context = new HashMap<>();
            context.put("title", "Настройки");
            context.put("visitor", visitor);
            context.put("tags", TagQueries.getPopularTags(sql));
            context.put("auths", UserQueries.getAuthCodes(sql, visitor));
            context.put("eopts", UserQueries.getEmailOpts(sql, visitor));
            context.put("ehash", UserQueries.getEmailHash(sql, visitor));
            context.put("emails", UserQueries.getEmails(sql, visitor));
            context.put("jids", UserQueries.getAllJIDs(sql, visitor));
            List<String> hours = IntStream.rangeClosed(0, 23).boxed()
                    .map(i -> StringUtils.leftPad(String.format("%d", i), 2, "0")).collect(Collectors.toList());
            context.put("hours", hours);
            context.put("fbstatus", CrosspostQueries.isFBCrossPostEnabled(sql, visitor.getUID()));
            context.put("twitter_name", CrosspostQueries.getTwitterName(sql, visitor.getUID()));
            context.put("telegram_name", CrosspostQueries.getTelegramName(sql, visitor.getUID()));
            context.put("notify_options", SubscriptionsQueries.getNotifyOptions(sql, visitor));
            context.put("userinfo", UserQueries.getUserInfo(sql, visitor));
            if (page.equals("auth-email")) {
                try {
                    String account = sql.queryForObject("SELECT account FROM auth WHERE user_id=? AND protocol='email' AND authcode=?",
                            String.class, visitor.getUID(), request.getParameter("code"));
                    sql.update("INSERT INTO emails(user_id,email) VALUES (?,?)", visitor.getUID(), account);
                    sql.update("DELETE FROM auth WHERE user_id=? AND authcode=?", visitor.getUID(), request.getParameter("code"));
                    context.put("result", "OK!");
                } catch (EmptyResultDataAccessException e) {
                    context.put("result", "Sorry, code unknown.");
                }
            }
            template.evaluate(out, context);
        }
    }

    protected void doPost(JdbcTemplate sql, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException, PebbleException {
        com.juick.User visitor = Utils.getVisitorUser(sql, request, response);
        if (visitor.getUID() == 0) {
            response.sendError(400);
            return;
        }
        List<String> pages = Arrays.asList("main", "password", "about", "email", "email-add", "email-del",
                "email-subscr", "auth-email", "privacy", "jid-del", "twitter-del", "telegram-del", "facebook-disable",
                "facebook-enable", "vk-del");
        String page = request.getParameter("page");
        if (StringUtils.isEmpty(page) || !pages.contains(page)) {
            response.sendError(400);
            return;
        }
        String result = "";
        switch (page) {
            case "password":
                if (UserQueries.updatePassword(sql, visitor, request.getParameter("password"))) {
                    result = "<p>Password has been changed.</p>";
                    String hash = com.juick.server.UserQueries.getHashByUID(sql, visitor.getUID());
                    Cookie c = new Cookie("hash", hash);
                    c.setMaxAge(365 * 24 * 60 * 60);
                    response.addCookie(c);
                }
                break;
            case "main":
                NotifyOpts opts = new NotifyOpts();
                opts.setRepliesEnabled(StringUtils.isNotEmpty(request.getParameter("jnotify")));
                opts.setSubscriptionsEnabled(StringUtils.isNotEmpty(request.getParameter("subscr_notify")));
                opts.setRecommendationsEnabled(StringUtils.isNotEmpty(request.getParameter("recomm")));
                if (SubscriptionsQueries.setNotifyOptions(sql, visitor, opts)) {
                    result = "<p>Notification options has been updated</p>";
                }
                break;
            case "about":
                UserInfo info = new UserInfo();
                info.setFullName(request.getParameter("fullname"));
                info.setCountry(request.getParameter("country"));
                info.setUrl(request.getParameter("url"));
                info.setDescription(request.getParameter("descr"));
                if (UserQueries.updateUserInfo(sql, visitor, info)) {
                    result = String.format("<p>Your info is updated.</p><p><a href='/%s/'>Back to blog</a>.</p>", visitor.getUName());
                }
                break;
            case "jid-del":
                String[] params = request.getParameter("delete").split(";", 2);
                int res = -1;
                if (params[0].equals("xmpp")) {
                    res = sql.update("DELETE FROM jids WHERE user_id=? AND jid=?", visitor.getUID(), params[1]);
                } else if (params[0].equals("xmpp-unauth")) {
                    res = sql.update("DELETE FROM auth WHERE user_id=? AND protocol='xmpp' AND account=?", visitor.getUID(), params[1]);
                }
                if (res == 1) {
                    result = "<p>Deleted. <a href=\"/settings\">Back</a>.</p>";
                } else {
                    result = "<p>Error</p>";
                }
                break;
            case "email":
                String newHash = UserQueries.updateSecretEmail(sql, visitor);
                if (StringUtils.isNotEmpty(newHash)) {
                    result = String.format("<p>New secret email: <strong>%s@mail.juick.com</strong></p>" +
                    "<p><a href=\"/settings\">Back</a>.</p>", newHash);
                } else {
                    response.sendError(500);
                    return;
                }
                break;
            case "email-add":
                try {
                    sql.queryForObject("SELECT authcode FROM auth WHERE user_id=? AND protocol='email' " +
                            "AND account=?", String.class, visitor.getUID(), request.getParameter("account"));
                } catch (EmptyResultDataAccessException e) {
                    String authCode = UserQueries.generateHash(8);
                    if (sql.update("INSERT INTO auth(user_id,protocol,account,authcode) VALUES (?,'email',?,?)",
                            visitor.getUID(), request.getParameter("account"), authCode) > 0) {
                        Session session = Session.getDefaultInstance(System.getProperties());
                        try {
                            MimeMessage message = new MimeMessage(session);
                            message.setFrom(new InternetAddress("noreply@mail.juick.com"));
                            message.addRecipient(Message.RecipientType.TO, new InternetAddress(request.getParameter("account")));
                            message.setSubject("Juick authorization link");
                            message.setText(String.format("Follow link to attach this email to Juick account:\n" +
                                    "http://juick.com/settings?page=auth-email&code=%s\n\n" +
                                    "If you don't know, what this mean - just ignore this mail.\n", authCode));
                            Transport.send(message);
                            result = "<p>Authorization link has been sent to your email. Follow it to proceed.</p>" +
                                    "<p><a href=\"/settings\">Back</a></p>";

                        } catch (MessagingException ex) {
                            logger.log(Level.SEVERE, "mail exception", ex);
                            response.sendError(500);
                            return;
                        }
                    }
                }
                break;
            case "email-del":
                if (sql.update("DELETE FROM emails WHERE user_id=? AND email=?", visitor.getUID(), request.getParameter("account")) > 0) {
                    result = "<p>Deleted. <a href=\"/settings\">Back</a>.</p>";
                } else {
                    result = "<p>An error occured while deleting.</p>";
                }
                break;
            case "email-subscr":
                sql.update("UPDATE emails SET subscr_hour=NULL WHERE user_id=?", visitor.getUID());
                String email = request.getParameter("account");
                if (StringUtils.isNotEmpty(email)) {
                    sql.update("UPDATE emails SET subscr_hour=? WHERE user_id=? AND email=?",
                            request.getParameter("time"), visitor.getUID(), email);
                    result = String.format("<p>Saved! Will send to <strong>%s</strong> at <strong>%s:00 GMT</strong>." +
                            "</p><p><a href=\"/settings\">Back</a></p>", email, request.getParameter("time"));
                } else {
                    result = "<p>Disabled.</p><p><a href=\"/settings\">Back</a></p>";
                }
                break;
            case "twitter-del":
                sql.update("DELETE FROM twitter WHERE user_id=?", visitor.getUID());
                sql.update("DELETE FROM subscr_users WHERE user_id=? AND suser_id=1741", visitor.getUID());
                for (Cookie cookie : request.getCookies()) {
                    if (cookie.getName().equals("request_token")) {
                        cookie.setMaxAge(0);
                        response.addCookie(cookie);
                    }
                    if (cookie.getName().equals("request_token_secret")) {
                        cookie.setMaxAge(0);
                        response.addCookie(cookie);
                    }
                }
                result = "<p><a href=\"/settings\">Back</a></p>";
                break;
            case "telegram-del":
                sql.update("DELETE FROM telegram WHERE user_id=?", visitor.getUID());
                result = "<p><a href=\"/settings\">Back</a></p>";
                break;
            case "facebook-disable":
                sql.update("UPDATE facebook SET crosspost=0 WHERE user_id=?", visitor.getUID());
                sql.update("DELETE FROM subscr_users WHERE user_id=? AND suser_id=5863", visitor.getUID());
                result = "<p><a href=\"/settings\">Back</a></p>";
                break;
            case "facebook-enable":
                sql.update("UPDATE facebook SET crosspost=1 WHERE user_id=?", visitor.getUID());
                sql.update("INSERT INTO subscr_users(user_id,suser_id,jid,active) VALUES (?,5863,'juick@facebook.juick.com',1)", visitor.getUID());
                result = "<p><a href=\"/settings\">Back</a></p>";
                break;
            case "vk-del":
                sql.update("DELETE FROM vk WHERE user_id=?", visitor.getUID());
                result = "<p><a href=\"/settings\">Back</a></p>";
                break;
            default:
                response.sendError(400);
                return;
        }
        response.setContentType("text/html; charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            PebbleTemplate template = Utils.getEngine().getTemplate("views/settings_result.html");
            Map<String, Object> context = new HashMap<>();
            context.put("title", "Настройки");
            context.put("visitor", visitor);
            context.put("result", result);
            template.evaluate(out, context);
        }
    }
}