// ConfigBasic.java 
// -----------------------
// part of YaCy
// (C) by Michael Peter Christen; mc@yacy.net
// first published on http://www.anomic.de
// Frankfurt, Germany, 2006
// Created 28.02.2006
//
// $LastChangedDate$
// $LastChangedRevision$
// $LastChangedBy$
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

// You must compile this file with
// javac -classpath .:../classes ConfigBasic_p.java
// if the shell's current path is HTROOT

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.regex.Pattern;

import net.yacy.cora.protocol.Domains;
import net.yacy.cora.protocol.HeaderFramework;
import net.yacy.cora.protocol.RequestHeader;
import net.yacy.kelondro.workflow.InstantBusyThread;
import net.yacy.peers.yacySeed;
import net.yacy.search.Switchboard;
import net.yacy.search.SwitchboardConstants;

import de.anomic.data.WorkTables;
import de.anomic.data.Translator;
import de.anomic.http.server.HTTPDFileHandler;
import de.anomic.server.serverCore;
import de.anomic.server.serverObjects;
import de.anomic.server.serverSwitch;
import de.anomic.tools.UPnP;

public class ConfigBasic {
    
    private static final int NEXTSTEP_FINISHED  = 0;
    private static final int NEXTSTEP_PWD       = 1;
    private static final int NEXTSTEP_PEERNAME  = 2;
    private static final int NEXTSTEP_PEERPORT  = 3;
    private static final int NEXTSTEP_RECONNECT = 4;
    
    public static serverObjects respond(final RequestHeader header, final serverObjects post, final serverSwitch env) throws FileNotFoundException, IOException {
        
        // return variable that accumulates replacements
        final Switchboard sb = (Switchboard) env;
        final serverObjects prop = new serverObjects();
        final String langPath = env.getDataPath("locale.work", "DATA/LOCALE/locales").getAbsolutePath();
        String lang = env.getConfig("locale.language", "default");
        
        final int authentication = sb.adminAuthenticated(header);
        if (authentication < 2) {
            // must authenticate
            prop.put("AUTHENTICATE", "admin log-in"); 
            return prop;
        }
        
        // store this call as api call
        if (post != null && post.containsKey("set")) {
            sb.tables.recordAPICall(post, "ConfigBasic.html", WorkTables.TABLE_API_TYPE_CONFIGURATION, "basic settings");
        }
        
        //boolean doPeerPing = false;
        if ((sb.peers.mySeed().isVirgin()) || (sb.peers.mySeed().isJunior())) {
            InstantBusyThread.oneTimeJob(sb.yc, "peerPing", null, 0);
            //doPeerPing = true;
        }
        
        // language settings
        if (post != null && post.containsKey("language")  && !lang.equals(post.get("language", "default")) &&
                (Translator.changeLang(env, langPath, post.get("language", "default") + ".lng"))) {
            prop.put("changedLanguage", "1");
        }
        
        // peer name settings
        final String peerName = (post == null) ? sb.peers.mySeed().getName() : post.get("peername", "");
        
        // port settings
        final long port;
        if (post != null && post.getInt("port", 0) > 1023) {
            port = post.getLong("port", 8090);
        } else {
            port = env.getConfigLong("port", 8090); //this allows a low port, but it will only get one, if the user edits the config himself.
        }

        // check if peer name already exists
        final yacySeed oldSeed = sb.peers.lookupByName(peerName);
        if (oldSeed == null &&
            !peerName.equals(sb.peers.mySeed().getName()) &&
            Pattern.compile("[A-Za-z0-9\\-_]{3,80}").matcher(peerName).matches()) {
            sb.peers.setMyName(peerName);
            sb.peers.saveMySeed();
        }
        
        // UPnP config
        final boolean upnp;
        if (post != null && post.containsKey("port")) { // hack to allow checkbox
            upnp = post.containsKey("enableUpnp");
            if (upnp && !sb.getConfigBool(SwitchboardConstants.UPNP_ENABLED, false)) {
                UPnP.addPortMapping();
            }
            sb.setConfig(SwitchboardConstants.UPNP_ENABLED, upnp);
            if (!upnp) {
                UPnP.deletePortMapping();
            }
        } else {
            upnp = false;
        }
        
        // check port
        final boolean reconnect;
        if (!(env.getConfigLong("port", port) == port)) {
            // validate port
            final serverCore theServerCore = (serverCore) env.getThread("10_httpd");
            env.setConfig("port", port);
            
            // redirect the browser to the new port
            reconnect = true;
            
            // renew upnp port mapping
            if (upnp) {
                UPnP.addPortMapping();
            }
            
            String host = null;
            if (header.containsKey(HeaderFramework.HOST)) {
                host = header.get(HeaderFramework.HOST);
                final int idx = host.indexOf(':');
                if (idx != -1) host = host.substring(0,idx);
            } else {
                host = Domains.myPublicLocalIP().getHostAddress();
            }
            
            prop.put("reconnect", "1");
            prop.put("reconnect_host", host);
            prop.put("nextStep_host", host);
            prop.put("reconnect_port", port);
            prop.put("nextStep_port", port);
            prop.put("reconnect_sslSupport", theServerCore.withSSL() ? "1" : "0");
            prop.put("nextStep_sslSupport", theServerCore.withSSL() ? "1" : "0");
            
            // generate new shortcut (used for Windows)
            //yacyAccessible.setNewPortBat(Integer.parseInt(port));
            //yacyAccessible.setNewPortLink(Integer.parseInt(port));
            
            // force reconnection in 7 seconds
            theServerCore.reconnect(7000);
        } else {
            reconnect = false;
            prop.put("reconnect", "0");
        }

        // set a use case
        String networkName = sb.getConfig(SwitchboardConstants.NETWORK_NAME, "");
        if (post != null && post.containsKey("usecase")) {
            if ("freeworld".equals(post.get("usecase", "")) && !"freeworld".equals(networkName)) {
                // switch to freeworld network
                sb.switchNetwork("defaults/yacy.network.freeworld.unit");
                // switch to p2p mode
                sb.setConfig(SwitchboardConstants.INDEX_DIST_ALLOW, true);
                sb.setConfig(SwitchboardConstants.INDEX_RECEIVE_ALLOW, true);
            }
            if ("portal".equals(post.get("usecase", "")) && !"webportal".equals(networkName)) {
                // switch to webportal network
                sb.switchNetwork("defaults/yacy.network.webportal.unit");
                // switch to robinson mode
                sb.setConfig(SwitchboardConstants.INDEX_DIST_ALLOW, false);
                sb.setConfig(SwitchboardConstants.INDEX_RECEIVE_ALLOW, false);
            }
            if ("intranet".equals(post.get("usecase", "")) && !"intranet".equals(networkName)) {
                // switch to intranet network
                sb.switchNetwork("defaults/yacy.network.intranet.unit");
                // switch to p2p mode: enable ad-hoc networks between intranet users
                sb.setConfig(SwitchboardConstants.INDEX_DIST_ALLOW, false);
                sb.setConfig(SwitchboardConstants.INDEX_RECEIVE_ALLOW, false);
            }
            if ("intranet".equals(post.get("usecase", ""))) {
                final String repositoryPath = post.get("repositoryPath", "/DATA/HTROOT/repository");
                final File repository = ((repositoryPath.length() > 0 && repositoryPath.charAt(0) == '/') || (repositoryPath.length() > 1 && repositoryPath.charAt(1) == ':')) ? new File(repositoryPath) : new File(sb.getDataPath(), repositoryPath);
                if (repository.exists() && repository.isDirectory()) {
                	sb.setConfig("repositoryPath", repositoryPath);
                }
            }
        }
        
        networkName = sb.getConfig(SwitchboardConstants.NETWORK_NAME, "");
        if ("freeworld".equals(networkName)) {
            prop.put("setUseCase", 1);
            prop.put("setUseCase_freeworldChecked", 1);
        } else if ("webportal".equals(networkName)) {
            prop.put("setUseCase", 1);
            prop.put("setUseCase_portalChecked", 1);
        } else if ("intranet".equals(networkName)) {
            prop.put("setUseCase", 1);
            prop.put("setUseCase_intranetChecked", 1);
        } else {
            prop.put("setUseCase", 0);
        }
        prop.put("setUseCase_port", port);
        prop.put("setUseCase_repositoryPath", sb.getConfig("repositoryPath", "/DATA/HTROOT/repository"));
        
        // check if values are proper
        final boolean properPassword = (sb.getConfig(SwitchboardConstants.ADMIN_ACCOUNT_B64MD5, "").length() > 0) || sb.getConfigBool("adminAccountForLocalhost", false);
        final boolean properName = (sb.peers.mySeed().getName().length() >= 3) && (!(yacySeed.isDefaultPeerName(sb.peers.mySeed().getName())));
        final boolean properPort = (sb.peers.mySeed().isSenior()) || (sb.peers.mySeed().isPrincipal());
        
        if ((env.getConfig("defaultFiles", "").startsWith("ConfigBasic.html,"))) {
            env.setConfig("defaultFiles", env.getConfig("defaultFiles", "").substring(17));
            env.setConfig("browserPopUpPage", "Status.html");
            HTTPDFileHandler.initDefaultPath();
        }
        
        prop.put("statusName", properName ? "1" : "0");
        prop.put("statusPort", properPort ? "1" : "0");
        if (reconnect) {
            prop.put("nextStep", NEXTSTEP_RECONNECT);
        } else if (!properName) {
            prop.put("nextStep", NEXTSTEP_PEERNAME);
        } else if (!properPassword) {
            prop.put("nextStep", NEXTSTEP_PWD);
        } else if (!properPort) {
            prop.put("nextStep", NEXTSTEP_PEERPORT);
        } else {
            prop.put("nextStep", NEXTSTEP_FINISHED);
        }
                
        final boolean upnp_enabled = env.getConfigBool(SwitchboardConstants.UPNP_ENABLED, false);
        prop.put("upnp", "1");
        prop.put("upnp_enabled", upnp_enabled ? "1" : "0");
        if (upnp_enabled) {
            prop.put("upnp_success", (UPnP.getMappedPort() > 0) ? "2" : "1");
        }
        else {
            prop.put("upnp_success", "0");
        }
        
        // set default values       
        prop.putHTML("defaultName", sb.peers.mySeed().getName());
        prop.putHTML("defaultPort", env.getConfig("port", "8090"));
        lang = env.getConfig("locale.language", "default"); // re-assign lang, may have changed
        if ("default".equals(lang)) {
            prop.put("langDeutsch", "0");
            prop.put("langFrancais", "0");
            prop.put("langEnglish", "1");
        } else if ("fr".equals(lang)) {
            prop.put("langDeutsch", "0");
            prop.put("langFrancais", "1");
            prop.put("langEnglish", "0");
        } else if ("de".equals(lang)) {
            prop.put("langDeutsch", "1");
            prop.put("langFrancais", "0");
            prop.put("langEnglish", "0");
        } else {
            prop.put("langDeutsch", "0");
            prop.put("langFrancais", "0");
            prop.put("langEnglish", "0");
        }
        return prop;
    }
}