package com.github.theholywaffle.teamspeak3;

/*
 * #%L
 * TeamSpeak 3 Java API
 * %%
 * Copyright (C) 2014 Bert De Geyter
 * %%
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * #L%
 */

import com.github.theholywaffle.teamspeak3.api.Callback;
import com.github.theholywaffle.teamspeak3.api.exception.TS3ConnectionFailedException;
import com.github.theholywaffle.teamspeak3.commands.CQuit;
import com.github.theholywaffle.teamspeak3.commands.Command;
import com.github.theholywaffle.teamspeak3.log.LogHandler;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.Socket;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.logging.Handler;
import java.util.logging.Logger;

public class TS3Query {

        public enum FloodRate {
                DEFAULT(350),
                UNLIMITED(0);

                private final int ms;

                FloodRate(int ms) {
                        this.ms = ms;
                }

                public int getMs() {
                        return ms;
                }
        }

        public static final Logger log = Logger.getLogger(TS3Query.class.getName());
        private final EventManager eventManager = new EventManager();
        private final TS3Config config;
        private Socket socket;
        private PrintStream out;
        private BufferedReader in;
        private SocketReader socketReader;
        private SocketWriter socketWriter;
        private KeepAliveThread keepAlive;
        private ConcurrentLinkedQueue<Command> commandList = new ConcurrentLinkedQueue<>();
        private TS3Api api;
        private TS3ApiAsync asyncApi;

        public TS3Query(TS3Config config) {
                log.setUseParentHandlers(false);
                log.addHandler(new LogHandler(config.getDebugToFile()));
                log.setLevel(config.getDebugLevel());
                this.config = config;
        }

        public TS3Query connect() {
                // exit();
                try {
                        socket = new Socket(config.getHost(), config.getQueryPort());
                        if (socket.isConnected()) {
                                out = new PrintStream(socket.getOutputStream(), true, "UTF-8");
                                in = new BufferedReader(new InputStreamReader(socket.getInputStream(), "UTF-8"));
                                socketReader = new SocketReader(this);
                                socketReader.start();
                                socketWriter = new SocketWriter(this, config.getFloodRate().getMs());
                                socketWriter.start();
                                keepAlive = new KeepAliveThread(this, socketWriter);
                                keepAlive.start();
                        }
                } catch (final IOException e) {
                        throw new TS3ConnectionFailedException(e);
                }

                // Executing config object
                final TS3Api api = getApi();
                if (config.getUsername() != null && config.getPassword() != null) {
                        api.login(config.getUsername(), config.getPassword());
                }
                return this;
        }

        public Socket getSocket() {
                return socket;
        }

        public PrintStream getOut() {
                return out;
        }

        public BufferedReader getIn() {
                return in;
        }

        public boolean doCommand(Command c) {
                final Object signal = new Object();
                final Callback callback = new Callback() {
                        @Override
                        public void handle() {
                                synchronized (signal) {
                                        signal.notifyAll();
                                }
                        }
                };
                socketReader.registerCallback(c, callback);

                final long end = System.currentTimeMillis() + config.getCommandTimeout();
                commandList.offer(c);

                boolean interrupted = false;
                while (!c.isAnswered() && System.currentTimeMillis() < end) {
                        try {
                                synchronized (signal) {
                                        signal.wait(end - System.currentTimeMillis());
                                }
                        } catch (final InterruptedException e) {
                                interrupted = true;
                        }
                }
                if (interrupted) {
                        // Restore the interrupt
                        Thread.currentThread().interrupt();
                }

                if (!c.isAnswered()) {
                        log.severe("Command " + c.getName() + " was not answered in time.");
                        return false;
                }

                return c.getError().isSuccessful();
        }

        public void doCommandAsync(final Command c) {
                doCommandAsync(c, null);
        }

        public void doCommandAsync(final Command c, final Callback callback) {
                if (callback != null) {
                        socketReader.registerCallback(c, callback);
                }
                commandList.offer(c);
        }

        /**
         * Removes and closes all used resources to the teamspeak server.
         */
        public void exit() {
                // Send a quit command synchronously
                // This will guarantee that all previously sent commands have been processed
                doCommand(new CQuit());

                if (keepAlive != null) {
                        keepAlive.interrupt();
                }
                if (socketWriter != null) {
                        socketWriter.interrupt();
                }
                if (socketReader != null) {
                        socketReader.interrupt();
                }

                if (out != null) {
                        out.close();
                }
                if (in != null) {
                        try {
                                in.close();
                        } catch (IOException ignored) {
                        }
                }
                if (socket != null) {
                        try {
                                socket.close();
                        } catch (IOException ignored) {
                        }
                }

                try {
                        if (keepAlive != null) {
                                keepAlive.join();
                        }
                        if (socketWriter != null) {
                                socketWriter.join();
                        }
                        if (socketReader != null) {
                                socketReader.join();
                        }
                } catch (final InterruptedException e) {
                        // Restore the interrupt for the caller
                        Thread.currentThread().interrupt();
                }

                commandList.clear();
                commandList = null;
                for (final Handler lh : log.getHandlers()) {
                        log.removeHandler(lh);
                }
        }

        public ConcurrentLinkedQueue<Command> getCommandList() {
                return commandList;
        }

        public EventManager getEventManager() {
                return eventManager;
        }

        public TS3Api getApi() {
                if (api == null) {
                        api = new TS3Api(this);
                }
                return api;
        }

        public TS3ApiAsync getAsyncApi() {
                if (asyncApi == null) {
                        asyncApi = new TS3ApiAsync(this);
                }
                return asyncApi;
        }
}