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*/package com.lutao.cloud.iot.mqtt.core.server.http.core;


import com.lutao.cloud.iot.mqtt.core.server.MqttServerCreator;
import com.lutao.cloud.iot.mqtt.core.server.http.api.MqttHttpApi;
import com.lutao.cloud.iot.mqtt.core.server.http.api.auth.BasicAuthFilter;
import com.lutao.cloud.iot.mqtt.core.server.http.handler.MqttHttpRequestHandler;
import com.lutao.cloud.iot.mqtt.core.server.http.handler.MqttHttpRoutes;
import com.lutao.cloud.iot.mqtt.core.server.http.websocket.MqttWsMsgHandler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.tio.core.intf.AioHandler;
import org.tio.http.common.HttpConfig;
import org.tio.http.common.HttpUuid;
import org.tio.http.common.handler.HttpRequestHandler;
import org.tio.server.ServerTioConfig;
import org.tio.server.TioServer;
import org.tio.server.intf.ServerAioListener;
import org.tio.utils.Threads;
import org.tio.utils.hutool.StrUtil;
import org.tio.utils.thread.pool.SynThreadPoolExecutor;
import org.tio.websocket.server.handler.IWsMsgHandler;

import java.io.IOException;
import java.util.Objects;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * mqtt web Server，集成 http 和 websocket
 *
 * @author tanyaowu

 */
public class MqttWebServer {
	private static final Logger logger = LoggerFactory.getLogger(MqttWebServer.class);
	private static final String TIO_SYSTEM_TIMER_PERIOD = "tio.system.timer.period";
	private final ServerAioListener serverAioListener;
	private final HttpRequestHandler httpRequestHandler;
	private HttpConfig httpConfig = null;
	private ServerTioConfig serverTioConfig = null;
	private MqttWebServerAioHandler mqttWebServerAioHandler = null;
	private TioServer tioServer = null;

	public MqttWebServer(MqttServerCreator serverCreator, ServerAioListener serverAioListener, IWsMsgHandler wsMsgHandler) {
		this(serverCreator, serverAioListener, new MqttHttpRequestHandler(), wsMsgHandler, null, null);
	}

	public MqttWebServer(MqttServerCreator serverCreator, ServerAioListener serverAioListener, HttpRequestHandler requestHandler, IWsMsgHandler wsMsgHandler, SynThreadPoolExecutor tioExecutor, ThreadPoolExecutor groupExecutor) {
		if (tioExecutor == null) {
			tioExecutor = Threads.getTioExecutor();
		}
		if (groupExecutor == null) {
			groupExecutor = Threads.getGroupExecutor();
		}
		this.httpRequestHandler = requestHandler;
		this.serverAioListener = serverAioListener;
		init(serverCreator, wsMsgHandler, tioExecutor, groupExecutor);
	}

	public HttpConfig getHttpConfig() {
		return httpConfig;
	}

	public HttpRequestHandler getHttpRequestHandler() {
		return httpRequestHandler;
	}

	public MqttWebServerAioHandler getMqttWebServerAioHandler() {
		return mqttWebServerAioHandler;
	}

	public ServerTioConfig getServerTioConfig() {
		return serverTioConfig;
	}

	public TioServer getTioServer() {
		return tioServer;
	}

	private void init(MqttServerCreator serverCreator, IWsMsgHandler wsMsgHandler,
					  SynThreadPoolExecutor tioExecutor, ThreadPoolExecutor groupExecutor) {
		HttpConfig httpConfig = new HttpConfig(serverCreator.getWebPort(), false);
		httpConfig.setBindIp(serverCreator.getIp());
		httpConfig.setName(serverCreator.getName() + "HTTP/Websocket");
		httpConfig.setCheckHost(false);
		this.httpConfig = httpConfig;
		this.httpConfig.setHttpRequestHandler(this.httpRequestHandler);
		this.mqttWebServerAioHandler = new MqttWebServerAioHandler(httpConfig, this.httpRequestHandler, wsMsgHandler);
		this.serverTioConfig = new ServerTioConfig(this.httpConfig.getName(), mqttWebServerAioHandler, this.serverAioListener, tioExecutor, groupExecutor);
		this.serverTioConfig.setHeartbeatTimeout(0);
		this.serverTioConfig.setReadBufferSize(1024 * 30);
		this.serverTioConfig.setTioUuid(new HttpUuid());
		this.tioServer = new TioServer(serverTioConfig);
	}

	public void start() throws IOException {
		tioServer.start(this.httpConfig.getBindIp(), this.httpConfig.getBindPort());
	}

	public boolean stop() {
		return tioServer.stop();
	}

	/**
	 * 配置 web 服务
	 *
	 * @param serverCreator    MqttServerCreator
	 * @param mqttServerConfig ServerTioConfig
	 * @return MqttWebServer
	 */
	public static MqttWebServer config(MqttServerCreator serverCreator, ServerTioConfig mqttServerConfig) {
		// 1. 判断是否开启
		boolean httpEnable = serverCreator.isHttpEnable();
		boolean websocketEnable = serverCreator.isWebsocketEnable();
		logger.info("Mica mqtt http api enable:{} websocket enable:{}", httpEnable, websocketEnable);
		if (!httpEnable && !websocketEnable) {
			return null;
		}
		// 2. 如果开启 mqtt http api
		if (httpEnable) {
			// 2.1 http 特有的配置
			String systemTimerPeriod = System.getProperty(TIO_SYSTEM_TIMER_PERIOD);
			if (StrUtil.isBlank(systemTimerPeriod)) {
				System.setProperty(TIO_SYSTEM_TIMER_PERIOD, "50");
			}
			// 2.2 http 路由配置
			MqttHttpApi httpApi = new MqttHttpApi(serverCreator.getMessageDispatcher());
			httpApi.register();
			// 2.3 认证配置
			String username = serverCreator.getHttpBasicUsername();
			String password = serverCreator.getHttpBasicPassword();
			if (Objects.nonNull(username) && Objects.nonNull(password)) {
				MqttHttpRoutes.addFilter(new BasicAuthFilter(username, password));
			}
		}
		// 3. 初始化处理器
		AioHandler mqttAioHandler = mqttServerConfig.getAioHandler();
		ServerAioListener mqttAioListener = (ServerAioListener) mqttServerConfig.getAioListener();
		IWsMsgHandler mqttWsMsgHandler = new MqttWsMsgHandler(serverCreator, mqttAioHandler);
		MqttWebServer httpServerStarter = new MqttWebServer(serverCreator, mqttAioListener, mqttWsMsgHandler);
		ServerTioConfig httpIioConfig = httpServerStarter.getServerTioConfig();
		// 4. tcp + websocket mqtt 共享公共配置
		httpIioConfig.share(mqttServerConfig);
		httpIioConfig.groupStat = mqttServerConfig.groupStat;
		return httpServerStarter;
	}

}
