/*
 * 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.juick.server.MessagesQueries;
import com.juick.server.TagQueries;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.sql.Connection;
import java.util.ArrayList;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

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

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

        String requesturi = request.getRequestURI();

        com.juick.Tag paramTag = null;
        String paramTagStr = null;
        if (requesturi.startsWith("/tag/")) {
            paramTagStr = URLDecoder.decode(request.getRequestURI().substring(5), "UTF-8");
            paramTag = TagQueries.getTag(sql, paramTagStr, false);
        }
        if (paramTag == null) {
            response.sendError(404);
            return;
        }

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

        int visitor_uid = visitor != null ? visitor.UID : 0;

        String title = "*" + Utils.encodeHTML(paramTag.Name);
        ArrayList<Integer> mids = MessagesQueries.getTag(sql, paramTag.TID, visitor_uid, paramBefore, (visitor == null) ? 40 : 20);

        response.setContentType("text/html; charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            String canonical = "";
            if (!paramTag.Name.equals(paramTagStr) && paramBefore == 0) {
                canonical = "<link rel=\"canonical\" href=\"http://juick.com/tag/" + URLEncoder.encode(paramTag.Name, "UTF-8") + "\"/>";
            }
            PageTemplates.pageHead(out, title, canonical);
            PageTemplates.pageNavigation(out, visitor, null);

            PageTemplates.pageHomeColumn(out, sql, visitor);

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

            if (mids.size() > 0) {
                PageTemplates.printMessages(out, sql, null, mids, visitor, visitor == null ? 2 : 3, 0);
            }

            if (mids.size() >= 20) {
                String nextpage = "/tag/" + URLEncoder.encode(paramTag.Name, "UTF-8") + "?before=" + mids.get(mids.size() - 1);
                out.println("<p class=\"page\"><a href=\"" + nextpage + "\">Older →</a></p>");
            }

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

            PageTemplates.pageFooter(request, out, visitor, true);
            PageTemplates.pageDialogTemplate(out);
            PageTemplates.pageEnd(out);
        } finally {
            out.close();
        }
    }
}