/*
 * 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.service.AdsService;
import com.juick.service.MessagesService;
import com.juick.service.UserService;
import com.juick.util.WebUtils;
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.apache.commons.lang3.math.NumberUtils;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
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.net.URLEncoder;
import java.util.List;

/**
 *
 * @author Ugnich Anton
 */
@Controller
public class Home {
    @Inject
    UserService userService;
    @Inject
    MessagesService messagesService;
    @Inject
    AdsService adsService;
    @Inject
    PageTemplates templates;
    @Inject
    WebApp webApp;

    @RequestMapping(value = "/{anything}/**", method = RequestMethod.GET)
    protected void parseAnyThing(HttpServletResponse response, @PathVariable String anything,
                                 @RequestParam(required = false, defaultValue = "0") int before) throws IOException {
        if (before == 0) {
            boolean isPostNumber = WebUtils.isPostNumber(anything);
            int messageId = isPostNumber ?
                    NumberUtils.toInt(anything) : 0;

            if (isPostNumber && anything.equals(Integer.toString(messageId))) {
                if (messageId > 0) {
                    com.juick.User author = messagesService.getMessageAuthor(messageId);

                    if (author != null) {
                        Utils.sendPermanentRedirect(response, "/" + author.getName() + "/" + anything);
                        return;
                    }
                }
            }
            com.juick.User user = userService.getUserByName(anything);
            if (user.getUid() > 0) {
                Utils.sendPermanentRedirect(response, "/" + user.getName() + "/");
                return;
            }
            response.sendError(HttpServletResponse.SC_NOT_FOUND);
            return;
        }
        com.juick.User user = userService.getUserByName(anything);
        if (user.getUid() > 0) {
            Utils.sendPermanentRedirect(response, "/" + user.getName() + "/?before=" + before);
            return;
        } else {
            response.sendError(HttpServletResponse.SC_NOT_FOUND);
            return;
        }
    }

    @RequestMapping(value = "/", method = RequestMethod.GET)
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
        String tag = request.getParameter("tag");
        if (tag != null) {
            Utils.sendPermanentRedirect(response, "/tag/" + URLEncoder.encode(tag, CharEncoding.UTF_8));
        }
        com.juick.User visitor = webApp.getVisitorUser(request, response);
        int paramBefore = NumberUtils.toInt(request.getParameter("before"), 0);

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

        String title;
        List<Integer> mids;

        String paramShow = request.getParameter("show");
        if (paramSearch != null) {
            title = "Поиск: " + StringEscapeUtils.escapeHtml4(paramSearch);
            mids = messagesService.getSearch(Utils.encodeSphinx(paramSearch), paramBefore);
        } else if (paramShow == null) {
            if (visitor.getUid() > 0) {
                title = "Популярные";
                mids = messagesService.getPopular(visitor.getUid(), paramBefore);
            } else {
                title = "Микроблоги Juick: популярные записи";
                mids = messagesService.getPopular(0, paramBefore);
            }

        } else if (paramShow.equals("top")) {
            Utils.sendPermanentRedirect(response, "/");
            return;
        } else if (paramShow.equals("my") && visitor != null) {
            title = "Моя лента";
            mids = messagesService.getMyFeed(visitor.getUid(), paramBefore);
        } else if (paramShow.equals("private") && visitor != null) {
            title = "Приватные";
            mids = messagesService.getPrivate(visitor.getUid(), paramBefore);
        } else if (paramShow.equals("discuss") && visitor != null) {
            title = "Обсуждения";
            mids = messagesService.getDiscussions(visitor.getUid(), paramBefore);
        } else if (paramShow.equals("recommended") && visitor != null) {
            title = "Рекомендации";
            mids = messagesService.getRecommended(visitor.getUid(), paramBefore);
        } else if (paramShow.equals("photos")) {
            title = "Фотографии";
            if (visitor != null) {
                mids = messagesService.getPhotos(visitor.getUid(), paramBefore);
            } else {
                mids = messagesService.getPhotos(0, paramBefore);
            }
        } else if (paramShow.equals("all")) {
            title = "Все сообщения";
            if (visitor != null) {
                mids = messagesService.getAll(visitor.getUid(), paramBefore);
            } else {
                mids = messagesService.getAll(0, paramBefore);
            }
        } else {
            response.sendError(HttpServletResponse.SC_NOT_FOUND);
            return;
        }

        response.setContentType("text/html; charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            String head = StringUtils.EMPTY;
            if (paramBefore > 0 || paramShow != null) {
                head = "<meta name=\"robots\" content=\"noindex\"/>";
            }
            templates.pageHead(out, visitor, title, head);
            templates.pageNavigation(out, visitor, paramSearch);

            out.println("<section id=\"content\">");

            if (paramShow == null && paramBefore == 0) {
                out.println("<!--noindex-->");
            }

            if (visitor.getUid() > 0) {
                out.println("<form action=\"/post\" method=\"post\" enctype=\"multipart/form-data\">");
                out.println("<section id=\"newmessage\">");
                if (messagesService.isReadonly()) {
                    out.println("<p>Комментирование временно недоступно</p>");
                } else {
                    out.println("  <textarea name=\"body\" placeholder=\"Новое сообщение...\"></textarea>");
                    out.println("  <div>");
                    out.println("    <input type=\"text\" class=\"img\" name=\"img\" " +
                            "placeholder=\"Ссылка на изображение (JPG/PNG, до 10Мб)\"/> " +
                            "или <a href=\"#\">загрузить</a><br/>");
                    out.println("    <input type=\"text\" class=\"tags\" name=\"tags\" " +
                            "placeholder=\"Теги (через пробел)\"/><br/>");
                    out.println("    <input type=\"submit\" class=\"subm\" value=\"Отправить\"/>");
                    out.println("  </div>");
                }
                out.println("</section>");
                out.println("</form>");
            }

            if (mids.size() > 0) {
                int ad_mid = 0;
                if (paramShow == null || paramShow.equals("top") || paramShow.equals("all")) {
                    int vuid = visitor.getUid();
                    ad_mid = adsService.getAdMid(vuid);
                    if (ad_mid > 0 && mids.indexOf(ad_mid) == -1) {
                        mids.add(0, ad_mid);
                        adsService.logAdMid(vuid, ad_mid);
                    } else {
                        ad_mid = 0;
                    }
                }

                templates.printMessages(out, null, mids, visitor, visitor.getUid() == 0 ? 2 : 3, ad_mid);
            }

            if (mids.size() >= 20) {
                String nextpage = "?before=" + mids.get(mids.size() - 1);
                if (paramShow != null) {
                    nextpage += "&amp;show=" + paramShow;
                }
                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>");
            }

            if (paramShow == null && paramBefore == 0) {
                out.println("<!--/noindex-->");
            }

            out.println("</section>");
			
			templates.pageHomeColumn(out, visitor, paramShow == null && paramBefore == 0 && paramSearch == null && visitor.getUid() == 0);

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