/*
 * Juick
 * Copyright (C) 2008-2011, 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.http.www;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.JSONSerializer;
import com.juick.Tag;
import com.juick.server.Endpoints;
import com.juick.server.MessagesQueries;
import com.juick.server.TagQueries;
import com.juick.server.UserQueries;
import org.apache.commons.lang3.tuple.Pair;
import org.json.JSONArray;
import org.json.JSONObject;
import org.springframework.jdbc.core.JdbcTemplate;

import java.io.IOException;
import java.io.PrintWriter;
import java.net.URLEncoder;
import java.util.List;
import java.util.stream.Collectors;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author Ugnich Anton
 */
public class User {

    protected void doGetBlog(JdbcTemplate sql, JdbcTemplate sqlSearch, HttpServletRequest request,
                             HttpServletResponse response, com.juick.User user) throws ServletException, IOException {
        com.juick.User visitor = Utils.getVisitorUser(sql, request, response);

        List<Integer> mids;

        String paramShow = request.getParameter("show");

        com.juick.Tag paramTag = null;
        String paramTagStr = request.getParameter("tag");
        if (paramTagStr != null) {
            if (paramTagStr.length() < 64) {
                paramTag = TagQueries.getTag(sql, paramTagStr, false);
            }
            if (paramTag == null) {
                Errors.doGet404(sql, request, response);
                return;
            } else if (!paramTag.Name.equals(paramTagStr)) {
                String url = "/" + user.getUName() + "/?tag=" + URLEncoder.encode(paramTag.Name, "UTF-8");
                Utils.sendPermanentRedirect(response, url);
                return;
            }
        }

        int paramBefore = 0;
        String paramBeforeStr = request.getParameter("before");
        if (paramBeforeStr != null) {
            try {
                paramBefore = Integer.parseInt(paramBeforeStr);
            } catch (NumberFormatException e) {
            }
        }

        String paramSearch = request.getParameter("search");
        if (paramSearch != null && paramSearch.length() > 64) {
            paramSearch = null;
        }

        int privacy = 0;
        if (visitor != null) {
            if (user.getUID() == visitor.getUID() || visitor.getUID() == 1) {
                privacy = -3;
            } else if (UserQueries.isInWL(sql, user.getUID(), visitor.getUID())) {
                privacy = -2;
            }
        }

        String title;
        if (paramShow == null) {
            if (paramTag != null) {
                title = "Блог " + user.getUName() + ": *" + Utils.encodeHTML(paramTag.Name);
                mids = MessagesQueries.getUserTag(sql, user.getUID(), paramTag.TID, privacy, paramBefore);
            } else if (paramSearch != null) {
                title = "Блог " + user.getUName() + ": " + Utils.encodeHTML(paramSearch);
                mids = MessagesQueries.getUserSearch(sql, sqlSearch, user.getUID(), Utils.encodeSphinx(paramSearch),
                        privacy, paramBefore);
            } else {
                title = "Блог " + user.getUName();
                mids = MessagesQueries.getUserBlog(sql, user.getUID(), privacy, paramBefore);
            }
        } else if (paramShow.equals("recomm")) {
            title = "Рекомендации " + user.getUName();
            mids = MessagesQueries.getUserRecommendations(sql, user.getUID(), paramBefore);
        } else if (paramShow.equals("photos")) {
            title = "Фотографии " + user.getUName();
            mids = MessagesQueries.getUserPhotos(sql, user.getUID(), privacy, paramBefore);
        } else {
            Errors.doGet404(sql, request, response);
            return;
        }

        if (visitor == null) {
            pageUserRefCookie(request, response, user.getUID());
        }

        response.setContentType("text/html; charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            String head = "<link rel=\"alternate\" type=\"application/rss+xml\" title=\"@" + user.getUName() + "\" href=\"//rss.juick.com/" + user.getUName() + "/blog\"/>";
            if (paramTag != null && TagQueries.getTagNoIndex(sql, paramTag.TID)) {
                head += "<meta name=\"robots\" content=\"noindex,nofollow\"/>";
            } else if (paramBefore > 0 || paramShow != null) {
                head += "<meta name=\"robots\" content=\"noindex\"/>";
            }
            PageTemplates.pageHead(out, title, head);
            PageTemplates.pageNavigation(out, visitor, null);
            pageUserColumn(out, sql, user, visitor);

            if (mids.size() > 0) {
                out.println("<section id=\"content\">");

                if (paramTag != null) {
                    out.println("<p class=\"page\"><a href=\"/tag/" + URLEncoder.encode(paramTag.Name, "UTF-8") + "\">← Все записи с тегом <b>" + Utils.encodeHTML(paramTag.Name) + "</b></a></p>");
                }

                PageTemplates.printMessages(out, sql, user, mids, visitor, visitor == null ? 4 : 5, 0);

                if (mids.size() >= 20) {
                    String nextpage = "?before=" + mids.get(mids.size() - 1);
                    if (paramShow != null) {
                        nextpage += "&amp;show=" + paramShow;
                    }
                    if (paramTag != null) {
                        nextpage += "&amp;tag=" + URLEncoder.encode(paramTag.Name, "UTF-8");
                    }
                    if (paramSearch != null) {
                        nextpage += "&amp;search=" + URLEncoder.encode(paramSearch, "UTF-8");
                    }
                    out.println("<p class=\"page\"><a href=\"" + nextpage + "\" rel=\"prev\">Читать дальше →</a></p>");
                }

                out.println("</section>");
            }

            PageTemplates.pageFooter(request, out, visitor, true);
            PageTemplates.pageEnd(out);
        }
    }

    protected void doGetTags(JdbcTemplate sql, HttpServletRequest request,
                             HttpServletResponse response, com.juick.User user) throws ServletException, IOException {
        com.juick.User visitor = Utils.getVisitorUser(sql, request, response);

        if (visitor == null) {
            pageUserRefCookie(request, response, user.getUID());
        }

        response.setContentType("text/html; charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            String head = "<meta name=\"robots\" content=\"noindex,nofollow\"/>";
            PageTemplates.pageHead(out, "Теги " + user.getUName(), head);
            PageTemplates.pageNavigation(out, visitor, null);
            pageUserColumn(out, sql, user, visitor);

            out.println("<section id=\"content\">");
            out.println("<p>" + pageUserTags(sql, user, 0) + "</p>");
            out.println("</section>");

            PageTemplates.pageFooter(request, out, visitor, false);
            PageTemplates.pageEnd(out);
        }
    }

    protected void doGetFriends(JdbcTemplate sql, HttpServletRequest request,
                                HttpServletResponse response, com.juick.User user) throws ServletException, IOException {
        com.juick.User visitor = Utils.getVisitorUser(sql, request, response);

        if (visitor == null) {
            pageUserRefCookie(request, response, user.getUID());
        }

        response.setContentType("text/html; charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            String head = "<meta name=\"robots\" content=\"noindex\"/>";
            PageTemplates.pageHead(out, "Подписки " + user.getUName(), head);
            PageTemplates.pageNavigation(out, visitor, null);
            pageUserColumn(out, sql, user, visitor);

            out.println("<section id=\"content\">");
            out.println("<table class=\"users\"><tr>");

            List<Pair<Integer, String>> friends = sql.query("SELECT users.id,users.nick FROM subscr_users " +
                            "INNER JOIN users ON subscr_users.user_id=users.id " +
                            "WHERE subscr_users.suser_id=? ORDER BY users.nick",
                    (rs, num) -> {
                        return Pair.of(rs.getInt(1), rs.getString(2));
                    }, user.getUID());
            for (int cnt = 0; cnt < friends.size(); cnt++) {
                if (cnt % 3 == 0 && cnt > 0) {
                    out.print("</tr><tr>");
                }
                out.print("<td><a href=\"/" + friends.get(cnt).getRight() + "/\"><img src=\"//i.juick.com/as/" + friends.get(cnt).getLeft() + ".png\"/>" + friends.get(cnt).getRight() + "</a></td>");
            }

            out.println("</tr></table>");
            out.println("</section>");

            PageTemplates.pageFooter(request, out, visitor, false);
            PageTemplates.pageEnd(out);
        }
    }

    protected void doGetReaders(JdbcTemplate sql, HttpServletRequest request,
                                HttpServletResponse response, com.juick.User user) throws ServletException, IOException {
        com.juick.User visitor = Utils.getVisitorUser(sql, request, response);

        if (visitor == null) {
            pageUserRefCookie(request, response, user.getUID());
        }

        response.setContentType("text/html; charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            String head = "<meta name=\"robots\" content=\"noindex\"/>";
            PageTemplates.pageHead(out, "Читатели " + user.getUName(), head);
            PageTemplates.pageNavigation(out, visitor, null);
            pageUserColumn(out, sql, user, visitor);

            out.println("<section id=\"content\">");
            out.println("<table class=\"users\"><tr>");

            List<Pair<Integer, String>> readers = sql.query("SELECT users.id,users.nick FROM subscr_users " +
                            "INNER JOIN users ON subscr_users.suser_id=users.id " +
                            "WHERE subscr_users.user_id=? ORDER BY users.nick",
                    (rs, num) -> {
                        return Pair.of(rs.getInt(1), rs.getString(2));
                    }, user.getUID());
            for (int cnt = 0; cnt < readers.size(); cnt++) {
                if (cnt % 3 == 0 && cnt > 0) {
                    out.print("</tr><tr>");
                }
                out.print("<td><a href=\"/" + readers.get(cnt).getRight() + "/\"><img src=\"//i.juick.com/as/" + readers.get(cnt).getLeft() + ".png\"/>" + readers.get(cnt).getRight() + "</a></td>");
            }
            out.println("</tr></table>");
            out.println("</section>");

            PageTemplates.pageFooter(request, out, visitor, false);
            PageTemplates.pageEnd(out);
        }
    }

    public static void pageUserRefCookie(HttpServletRequest request, HttpServletResponse response, int uid) {
        String hReferer = request.getHeader("Referer");
        String ref = Utils.getCookie(request, "ref");

        if (ref == null && (hReferer == null || !(hReferer.startsWith("http://"+ Endpoints.wwwJuickCom+"/") || hReferer.startsWith("https://"+Endpoints.wwwJuickCom+"/")))) {
            Cookie c = new Cookie("ref", Integer.toString(uid));
            c.setMaxAge(7 * 24 * 60 * 60);
            c.setPath("/");
            response.addCookie(c);
        }
    }

    public static void pageUserColumn(PrintWriter out, JdbcTemplate sql, com.juick.User user, com.juick.User visitor) {
        out.println("<aside id=\"column\">");
        out.println("  <div id=\"ctitle\"><a href=\"./\"><img src=\"//i.juick.com/as/" + user.getUID() + ".png\" alt=\"\"/>" + user.getUName() + "</a></div>");
        if (visitor != null && visitor.getUID() > 0 && visitor.getUID() != user.getUID()) {
            out.println("  <ul id=\"ctoolbar\">");
            if (UserQueries.isSubscribed(sql, visitor.getUID(), user.getUID())) {
                out.println("    <li><a href=\"/post?body=U+%40" + user.getUName() + "\" title=\"Подписан\"><div style=\"background-position: -48px 0\"></div></a></li>");
            } else {
                out.println("    <li><a href=\"/post?body=S+%40" + user.getUName() + "\" title=\"Подписаться\"><div style=\"background-position: -16px 0\"></div></a></li>");
            }
            if (UserQueries.isInBL(sql, visitor.getUID(), user.getUID())) {
                out.println("    <li><a href=\"/post?body=BL+%40" + user.getUName() + "\" title=\"Разблокировать\"><div style=\"background-position: -96px 0\"></div></a></li>");
            } else {
                out.println("    <li><a href=\"/post?body=BL+%40" + user.getUName() + "\" title=\"Заблокировать\"><div style=\"background-position: -80px 0\"></div></a></li>");
            }
            if (!UserQueries.isInBLAny(sql, user.getUID(), visitor.getUID())) {
                out.println("    <li><a href=\"/pm/sent?uname=" + user.getUName() + "\" title=\"Написать приватное сообщение\"><div style=\"background-position: -112px 0\"></div></a></li>");
            }
            out.println("  </ul>");
        } else {
            out.println("  <hr/>");
        }
        out.println("  <ul>");
        out.println("    <li><a href=\"./\">Блог</a></li>");
        out.println("    <li><a href=\"./?show=recomm\" rel=\"nofollow\">Рекомендации</a></li>");
        out.println("    <li><a href=\"./?show=photos\" rel=\"nofollow\">Фотографии</a></li>");
        if (visitor != null && visitor.getUID() == user.getUID() && false) {
            out.println("    <li><a href=\"/?show=mycomments\" rel=\"nofollow\">Мои комментарии</a></li>");
            out.println("    <li><a href=\"/?show=unanswered\" rel=\"nofollow\">Неотвеченные</a></li>");
        }
        out.println("  </ul>");
        out.println("  <hr/>");
        out.println("  <form action=\"./\">");
        out.println("  <p><input type=\"text\" name=\"search\" class=\"inp\" placeholder=\"Поиск\"/></p>");
        out.println("  </form>");
        out.println("  <p class=\"tags\">" + pageUserTags(sql, user, 20) + "<a href=\"./tags\" rel=\"nofollow\">...</a></p>");
        out.println("  <hr/>");
        out.println("  <div id=\"ustats\"><ul>");
        out.println("    <li><a href=\"./friends\">Я читаю: " + UserQueries.getStatsIRead(sql, user.getUID()) + "</a></li>");
        out.println("    <li><a href=\"./readers\">Мои подписчики: " + UserQueries.getStatsMyReaders(sql, user.getUID()) + "</a></li>");
        out.println("    <li>Сообщений: " + UserQueries.getStatsMessages(sql, user.getUID()) + "</li>");
        out.println("    <li>Комментариев: " + UserQueries.getStatsReplies(sql, user.getUID()) + "</li>");
        out.println("  </ul>");

        List<com.juick.User> iread = UserQueries.getUserReadLeastPopular(sql, user.getUID(), 8);
        if (!iread.isEmpty()) {
            out.println("<table class=\"iread\"><tr>");
            for (int i = 0; i < iread.size(); i++) {
                if (i == 4) {
                    out.println("</tr><tr>");
                }
                com.juick.User u = iread.get(i);
                out.println("<td><a href=\"/" + u.getUName() + "/\"><img src=\"//i.juick.com/a/" + u.getUID() + ".png\" alt=\"" + u.getUName() + "\"/></a></td>");
            }
            out.println("</tr></table>");
        }

        out.println("  </div>");
        out.println("</aside>");
    }

    public static String pageUserTags(JdbcTemplate sql, com.juick.User user, int cnt) {
        List<Tag> tags = getUserTags(sql, user, cnt);

        int maxUsageCnt = tags.size() > 0 ? tags.stream().mapToInt(tag -> tag.UsageCnt).max().getAsInt() : 1;

        return tags.stream().map(tag -> "<a href=\"./?tag=" + URLEncoder.encode(tag.Name) +
                "\" title=\"" + tag.UsageCnt + "\" rel=\"nofollow\">" + tag.Name + "</a>")
                .collect(Collectors.joining(" "));

        /*
                todo:
            if (tags[i].UsageCnt > maxUsageCnt / 3 * 2) {
                ret += "<big>" + tag + "</big> ";
            } else if (tags[i].UsageCnt > maxUsageCnt / 3) {
                ret += "<small>" + tag + "</small> ";
            } else {
                ret += tag + " ";
            }
        }*/
    }

    public static List<Tag> getUserTags(JdbcTemplate sql, com.juick.User user, int cnt) {
        List<Tag> tags;
        if (cnt > 0) {
            tags = sql.query("SELECT tags.name AS name,COUNT(DISTINCT messages_tags.message_id) AS cnt " +
                            "FROM (messages INNER JOIN messages_tags ON (messages.message_id=messages_tags.message_id)) " +
                            "INNER JOIN tags ON messages_tags.tag_id=tags.tag_id WHERE messages.user_id=? " +
                            "GROUP BY messages_tags.tag_id ORDER BY cnt DESC LIMIT ?",
                    (rs, num) -> {
                        Tag t = new Tag();
                        t.Name = rs.getString(1);
                        t.UsageCnt = rs.getInt(2);
                        return t;
                    }, user.getUID(), cnt);
        } else {
            tags = sql.query("SELECT tags.name AS name,COUNT(DISTINCT messages_tags.message_id) AS cnt " +
                    "FROM (messages INNER JOIN messages_tags ON (messages.message_id=messages_tags.message_id)) " +
                    "INNER JOIN tags ON messages_tags.tag_id=tags.tag_id WHERE messages.user_id=? " +
                    "GROUP BY messages_tags.tag_id ORDER BY cnt DESC", ((rs, rowNum) -> {
                Tag t = new Tag();
                t.Name = rs.getString(1);
                t.UsageCnt = rs.getInt(2);
                return t;
            }), user.getUID());
        }
        return tags;
    }

    public void doMyTagsJson(JdbcTemplate sql, HttpServletRequest request, HttpServletResponse response) throws IOException {
        com.juick.User visitor = Utils.getVisitorUser(sql, request, response);
        if (visitor != null) {
            List<Tag> userTags = getUserTags(sql, visitor, 200);
            JSONArray arr = new JSONArray();
            for (Tag userTag : userTags) {
                arr.put(userTag.Name);
            }
            response.setContentType("text/json");
            response.setCharacterEncoding("UTF-8");
            response.getOutputStream().write(arr.toString().getBytes("UTF-8"));
        } else {
            response.sendError(404);
        }
    }
}