/*

 * Quoridor server and related libraries

 * Copyright (C) 2009-2010 Jaroslav Tulach <jaroslav.tulach@apidesign.org>

 *

 * 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 3 of the License.

 *

 * 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. Look for COPYING file in the top folder.

 * If not, see http://www.gnu.org/licenses/.

 */

package cz.xelfi.quoridor.webidor.resources;

import com.sun.jersey.api.container.httpserver.HttpServerFactory;

import com.sun.jersey.api.core.PackagesResourceConfig;

import com.sun.jersey.api.core.ResourceConfig;

import com.sun.jersey.api.json.JSONWithPadding;

import com.sun.jersey.spi.resource.Singleton;

import com.sun.net.httpserver.HttpServer;

import cz.xelfi.quoridor.webidor.User;

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.net.ServerSocket;

import java.util.HashMap;

import java.util.Map;

import java.util.Properties;

import java.util.UUID;

import javax.ws.rs.GET;

import javax.ws.rs.PUT;

import javax.ws.rs.Path;

import javax.ws.rs.Produces;

import javax.ws.rs.QueryParam;

import javax.ws.rs.WebApplicationException;

import javax.ws.rs.core.MediaType;

import javax.ws.rs.core.Response.Status;

/**

 *

 * @author Jaroslav Tulach <jtulach@netbeans.org>

 */

@Path("/")

@Singleton

public final class Quoridor {

    private final File path;

    private Games games;

    private Users users;

    private final Map<UUID,String> loggedIn;

    public Quoridor() {

        final String prop = System.getProperty("quoridor.dir"); // NOI18N

        if (prop == null) {

            throw new IllegalStateException("quoridor.dir property must be specified"); // NOI18N

        }

        path = new File(prop);

        path.mkdirs();

        loggedIn = new HashMap<UUID, String>();

        games = new Games(new File(path, "games"), this); // NOI18N

        users = new Users(new File(path, "users"), this); // NOI18N

    }

    @Path("games")

    public Games getGames() {

        return games;

    }

    @Path("users")

    public Users getUsers() {

        return users;

    }

    @Path("login")

    @PUT

    @Produces({ MediaType.TEXT_PLAIN })

    public String login(

        @QueryParam("name") String name,

        @QueryParam("password") String password

    ) throws IOException {

        File f = new File(path, "passwd"); // NOI18Nt

        Properties p = new Properties();

        try {

            p.load(new FileInputStream(f));

        } catch (IOException ex) {

            ex.printStackTrace();

        }

        boolean loggedInOK = false;

        if (name != null && password.equals(p.getProperty(name))) {

            loggedInOK = true;

        } else {

            loggedInOK = getUsers().verifyPassword(name, password);

        }

        if (loggedInOK) {

            UUID uuid = UUID.randomUUID();

            loggedIn.put(uuid, name);

            return uuid.toString();

        } else {

            return null;

        }

    }

    @Path("login")

    @GET

    @Produces({ MediaType.TEXT_PLAIN })

    public String isLoggedIn(

        @QueryParam("id") String id

    ) {

        String ret = null;

        try {

            if (id != null) {

                ret = loggedIn.get(UUID.fromString(id));

            }

        } catch (IllegalArgumentException ex) {

            // OK, happens for invalid ids

        }

        return ret == null ? "" : ret;

    }

    @Path("login")

    @GET

    @Produces({ "application/x-javascript", MediaType.APPLICATION_JSON, MediaType.TEXT_XML })

    public JSONWithPadding loggedInInfo(

        @QueryParam("callback") String callback,

        @QueryParam("id") String id

    ) throws IOException {

        String ret = null;

        try {

            if (id != null) {

                ret = loggedIn.get(UUID.fromString(id));

            }

        } catch (IllegalArgumentException ex) {

            // OK, happens for invalid ids

        }

        if (ret == null) {

            throw new WebApplicationException(Status.UNAUTHORIZED);

        } else {

            return getUsers().getUserInfo(callback, id, ret);

        }

    }

    //

    // start the server

    //

    public static void main(String[] args) throws IOException, InterruptedException {

        int port = 9222;

        try {

            port = Integer.parseInt(args[0]);

        } catch (Exception ex) {

            // OK

        }

        HttpServer s = start(port);

        System.out.println(

            "Quoridor started at port " + port + "\n" + "Hit enter to stop it..."

        );

        if (args.length < 2 || !args[args.length - 1].equals("--kill")) {

            System.out.println("Hit enter to stop it...");

            System.in.read();

        } else {

            synchronized (Quoridor.class) {

                Quoridor.class.wait();

            }

        }

        System.in.read();

        s.stop(0);

        System.exit(0);

    }

    public static HttpServer start(int port) throws IOException {

        if (port == -1) {

            ServerSocket ss = new ServerSocket(0);

            port =ss.getLocalPort();

            ss.close();

        }

        final String baseUri = "http://localhost:" + port + "/";

        if (System.getProperty("quoridor.dir") == null) {

            File home = new File(System.getProperty("user.home"));

            File quoridor = new File(home, ".quoridor");

            System.setProperty("quoridor.dir", quoridor.getPath());

        }

        ResourceConfig rc = new PackagesResourceConfig("cz.xelfi.quoridor.webidor");

        HttpServer server = HttpServerFactory.create(baseUri, rc);

        server.start();

        return server;

    }

}