/*
 * 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.www.controllers;

import com.juick.server.helpers.TagStats;
import com.juick.server.util.HttpForbiddenException;
import com.juick.service.MessagesService;
import com.juick.service.TagService;
import com.juick.service.UserService;
import com.juick.util.UserUtils;
import com.juick.www.Utils;
import com.juick.www.WebApp;
import org.apache.commons.lang3.CharEncoding;
import org.apache.commons.lang3.StringEscapeUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestParam;

import javax.inject.Inject;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.Comparator;
import java.util.List;
import java.util.stream.Collectors;

/**
 *
 * @author Ugnich Anton
 */
@Controller
public class User {
    @Inject
    WebApp webApp;
    @Inject
    UserService userService;
    @Inject
    TagService tagService;
    @Inject
    MessagesService messagesService;
    @Inject
    PageTemplates templates;

    @GetMapping("/{uname}/")
    protected void doGetBlog(HttpServletRequest request, HttpServletResponse response,
                             @PathVariable String uname,
                             @RequestParam(required = false, defaultValue = "0") Integer before) throws IOException {
        com.juick.User user = userService.getUserByName(uname);
        com.juick.User visitor = UserUtils.getCurrentUser();
        if (user.isBanned()) {
            response.sendError(HttpServletResponse.SC_NOT_FOUND);
            return;
        }

        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 = tagService.getTag(paramTagStr, false);
            }
            if (paramTag == null) {
                response.sendError(HttpServletResponse.SC_NOT_FOUND);
                return;
            } else if (!paramTag.getName().equals(paramTagStr)) {
                String url = "/" + user.getName() + "/?tag=" + URLEncoder.encode(paramTag.getName(), CharEncoding.UTF_8);
                Utils.sendPermanentRedirect(response, url);
                return;
            }
        }


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

        int privacy = 0;
        if (visitor.getUid() > 0) {
            if (user.getUid() == visitor.getUid() || visitor.getUid() == 1) {
                privacy = -3;
            } else if (userService.isInWL(user.getUid(), visitor.getUid())) {
                privacy = -2;
            }
        }

        String title;
        if (paramShow == null) {
            if (paramTag != null) {
                title = "Блог " + user.getName() + ": *" + StringEscapeUtils.escapeHtml4(paramTag.getName());
                mids = messagesService.getUserTag(user.getUid(), paramTag.TID, privacy, before);
            } else if (paramSearch != null) {
                title = "Блог " + user.getName() + ": " + StringEscapeUtils.escapeHtml4(paramSearch);
                mids = messagesService.getUserSearch(user.getUid(), Utils.encodeSphinx(paramSearch), privacy, before);
            } else {
                title = "Блог " + user.getName();
                mids = messagesService.getUserBlog(user.getUid(), privacy, before);
            }
        } else if (paramShow.equals("recomm")) {
            title = "Рекомендации " + user.getName();
            mids = messagesService.getUserRecommendations(user.getUid(), before);
        } else if (paramShow.equals("photos")) {
            title = "Фотографии " + user.getName();
            mids = messagesService.getUserPhotos(user.getUid(), privacy, before);
        } else {
            response.sendError(HttpServletResponse.SC_NOT_FOUND);
            return;
        }

        response.setContentType("text/html; charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            String head = "<link rel=\"alternate\" type=\"application/rss+xml\" title=\"@" +
                    user.getName() + "\" href=\"//rss.juick.com/" + user.getName() + "/blog\"/>";
            if (paramTag != null && tagService.getTagNoIndex(paramTag.TID)) {
                head += "<meta name=\"robots\" content=\"noindex,nofollow\"/>";
            } else if (before > 0 || paramShow != null) {
                head += "<meta name=\"robots\" content=\"noindex\"/>";
            }
            templates.pageHead(out, visitor, title, head);
            templates.pageNavigation(out, visitor, null);
            pageUserColumn(out, 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.getName(), CharEncoding.UTF_8) + "\">← Все записи с тегом <b>" +
                            StringEscapeUtils.escapeHtml4(paramTag.getName()) + "</b></a></p>");
                }

                templates.printMessages(out, user, mids, visitor);

                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.getName(), CharEncoding.UTF_8);
                    }
                    if (paramSearch != null) {
                        nextpage += "&amp;search=" + URLEncoder.encode(paramSearch, CharEncoding.UTF_8);
                    }
                    out.println("<p class=\"page\"><a href=\"" + nextpage + "\" rel=\"prev\">Читать дальше →</a></p>");
                }

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

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

    @GetMapping("/{uname}/tags")
    protected void doGetTags(HttpServletRequest request, HttpServletResponse response,
                             @PathVariable String uname) throws IOException {
        com.juick.User user = userService.getUserByName(uname);
        com.juick.User visitor = UserUtils.getCurrentUser();
        if (visitor.isBanned()) {
            response.sendError(HttpServletResponse.SC_NOT_FOUND);
            return;
        }

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

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

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

    @GetMapping("/{uname}/friends")
    protected void doGetFriends(HttpServletRequest request, HttpServletResponse response,
                                @PathVariable String uname) throws IOException {
        com.juick.User user = userService.getUserByName(uname);
        com.juick.User visitor = UserUtils.getCurrentUser();
        if (visitor.isBanned()) {
            throw new HttpForbiddenException();
        }

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

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

            List<com.juick.User> friends = userService.getUserFriends(user.getUid());
            for (int i = 0; i < friends.size(); i++) {
                if (i % 3 == 0 && i > 0) {
                    out.print("</tr><tr>");
                }
                out.print("<td><a href=\"/" + friends.get(i).getName()
                        + "/\"><img src=\"//i.juick.com/as/" + friends.get(i).getUid() + ".png\"/>"
                        + friends.get(i).getName() + "</a></td>");
            }

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

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

    @GetMapping("/{uname}/readers")
    protected void doGetReaders(HttpServletRequest request, HttpServletResponse response,
                                @PathVariable String uname) throws IOException {
        com.juick.User user = userService.getUserByName(uname);
        com.juick.User visitor = UserUtils.getCurrentUser();
        if (visitor.isBanned()) {
            throw new HttpForbiddenException();
        }

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

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

            List<com.juick.User> readers = userService.getUserReaders(user.getUid());
            for (int i = 0; i < readers.size(); i++) {
                if (i % 3 == 0 && i > 0) {
                    out.print("</tr><tr>");
                }
                out.print("<td><a href=\"/" + readers.get(i).getName()
                        + "/\"><img src=\"//i.juick.com/as/" + readers.get(i).getUid() + ".png\"/>"
                        + readers.get(i).getName() + "</a></td>");
            }

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

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

    public void pageUserColumn(PrintWriter out, 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.getName() + "</a></div>");
        if (visitor.getUid() > 0 && visitor.getUid() != user.getUid()) {
            out.println("  <ul id=\"ctoolbar\">");
            if (userService.isSubscribed(visitor.getUid(), user.getUid())) {
                out.println("    <li><a href=\"/post?body=U+%40" + user.getName() + "\" title=\"Подписан\"><div style=\"background-position: -48px 0\"></div></a></li>");
            } else {
                out.println("    <li><a href=\"/post?body=S+%40" + user.getName() + "\" title=\"Подписаться\"><div style=\"background-position: -16px 0\"></div></a></li>");
            }
            if (userService.isInBL(visitor.getUid(), user.getUid())) {
                out.println("    <li><a href=\"/post?body=BL+%40" + user.getName() + "\" title=\"Разблокировать\"><div style=\"background-position: -96px 0\"></div></a></li>");
            } else {
                out.println("    <li><a href=\"/post?body=BL+%40" + user.getName() + "\" title=\"Заблокировать\"><div style=\"background-position: -80px 0\"></div></a></li>");
            }
            if (!userService.isInBLAny(user.getUid(), visitor.getUid())) {
                out.println("    <li><a href=\"/pm/sent?uname=" + user.getName() + "\" 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>");
        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(user, visitor, 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: " + userService.getStatsIRead(user.getUid()) + "</a></li>");
        out.println("    <li><a href=\"./readers\">Мои подписчики: " + userService.getStatsMyReaders(user.getUid()) + "</a></li>");
        out.println("    <li>Сообщений: " + userService.getStatsMessages(user.getUid()) + "</li>");
        out.println("    <li>Комментариев: " + userService.getStatsReplies(user.getUid()) + "</li>");
        out.println("  </ul>");

        List<com.juick.User> iread = userService.getUserReadLeastPopular(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.getName() + "/\"><img src=\"//i.juick.com/a/" + u.getUid() + ".png\" alt=\"" + u.getName() + "\"/></a></td>");
            }
            out.println("</tr></table>");
        }

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

    public String pageUserTags(com.juick.User user, com.juick.User visitor, int cnt) {
        List<TagStats> tags = tagService.getUserTagStats(user.getUid()).stream()
                .sorted((e1, e2) -> Integer.compare(e2.getUsageCount(), e1.getUsageCount())).collect(Collectors.toList());
        int maxUsageCnt = tags.stream().map(TagStats::getUsageCount).max(Comparator.naturalOrder()).orElse(0);
        String ret = StringUtils.EMPTY;
        int count = cnt > 0 ? Math.min(tags.size(), cnt) : tags.size();
        for (int i = 0; i < count; i++) {
            String tag = StringEscapeUtils.escapeHtml4(tags.get(i).getTag().getName());
            try {
                tag = "<a href=\"./?tag=" + URLEncoder.encode(tags.get(i).getTag().getName(), CharEncoding.UTF_8) + "\" title=\""
                        + tags.get(i).getUsageCount() + "\" rel=\"nofollow\">" + tag + "</a>";
            } catch (UnsupportedEncodingException e) {
            }

            if (tags.get(i).getUsageCount() > maxUsageCnt / 3 * 2) {
                ret += "<big>" + tag + "</big> ";
            } else if (tags.get(i).getUsageCount() > maxUsageCnt / 3) {
                ret += "<small>" + tag + "</small> ";
            } else {
                ret += tag + " ";
            }
        }
        return ret;
    }
}