package com.xcong.excoin.modules.okxNewPrice;

import cn.hutool.core.util.ObjectUtil;
import cn.hutool.core.util.StrUtil;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.xcong.excoin.modules.okxNewPrice.celue.CaoZuoService;
import com.xcong.excoin.modules.okxNewPrice.okxWs.*;
import com.xcong.excoin.modules.okxNewPrice.okxWs.enums.CoinEnums;
import com.xcong.excoin.modules.okxNewPrice.okxWs.enums.OrderParamEnums;
import com.xcong.excoin.modules.okxNewPrice.utils.SSLConfig;
import com.xcong.excoin.modules.okxNewPrice.wangge.WangGeService;
import com.xcong.excoin.utils.RedisUtils;
import lombok.extern.slf4j.Slf4j;
import org.java_websocket.client.WebSocketClient;
import org.java_websocket.handshake.ServerHandshake;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.stereotype.Component;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import java.math.BigDecimal;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.concurrent.*;
import java.util.concurrent.atomic.AtomicReference;

/**
 * OKX 新价格 WebSocket 客户端类，用于连接 OKX 的 WebSocket 接口，
 * 实时获取并处理标记价格（mark price）数据，并将价格信息存储到 Redis 中。
 * 同时支持心跳检测、自动重连以及异常恢复机制。
 * @author Administrator
 */
@Slf4j
@Component
@ConditionalOnProperty(prefix = "app", name = "quant", havingValue = "true")
public class OkxQuantWebSocketClient {
    @Autowired
    private WangGeService wangGeService;
    @Autowired
    private CaoZuoService caoZuoService;
    @Autowired
    private RedisUtils redisUtils;

    private WebSocketClient webSocketClient;
    private ScheduledExecutorService heartbeatExecutor;
    private volatile ScheduledFuture<?> pongTimeoutFuture;
    private final AtomicReference<Long> lastMessageTime = new AtomicReference<>(System.currentTimeMillis());

    private static final String WS_URL_MONIPAN = "wss://wspap.okx.com:8443/ws/v5/private";
    private static final String WS_URL_SHIPAN = "wss://ws.okx.com:8443/ws/v5/private";
    private static final boolean INTERNET = false;

    /**
     * 订阅频道指令
     */
    private static final String SUBSCRIBE = "subscribe";
    private static final String UNSUBSCRIBE = "unsubscribe";

    // 心跳超时时间(秒)，小于30秒
    private static final int HEARTBEAT_TIMEOUT = 10;

    // 共享线程池用于重连等异步任务
    private final ExecutorService sharedExecutor = Executors.newCachedThreadPool(r -> {
        Thread t = new Thread(r, "okx-ws-account-order-worker");
        t.setDaemon(true);
        return t;
    });

    /**
     * 初始化方法，在 Spring Bean 构造完成后执行。
     * 负责建立 WebSocket 连接并启动心跳检测任务。
     */
    @PostConstruct
    public void init() {
        connect();
        startHeartbeat();
    }

    /**
     * 销毁方法，在 Spring Bean 销毁前执行。
     * 关闭 WebSocket 连接、停止心跳定时器及相关的线程资源。
     */
    @PreDestroy
    public void destroy() {
        if (webSocketClient != null && webSocketClient.isOpen()) {
            subscribeAccountChannel(UNSUBSCRIBE);
            subscribePositionChannel(UNSUBSCRIBE);
            subscribeOrderInfoChannel(UNSUBSCRIBE);
            webSocketClient.close();
        }
        shutdownExecutorGracefully(heartbeatExecutor);
        if (pongTimeoutFuture != null) {
            pongTimeoutFuture.cancel(true);
        }
        shutdownExecutorGracefully(sharedExecutor);
    }

    private void shutdownExecutorGracefully(ExecutorService executor) {
        if (executor == null || executor.isTerminated()) {
            return;
        }
        try {
            executor.shutdown();
            if (!executor.awaitTermination(5, TimeUnit.SECONDS)) {
                executor.shutdownNow();
            }
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
            executor.shutdownNow();
        }
    }

    /**
     * 建立与 OKX WebSocket 服务器的连接。
     * 设置回调函数以监听连接打开、接收消息、关闭和错误事件。
     */
    private void connect() {
        try {
            InstrumentsWs.handleEvent(redisUtils);
            wangGeService.initWangGe();
            SSLConfig.configureSSL();
            System.setProperty("https.protocols", "TLSv1.2,TLSv1.3");
            String WS_URL = WS_URL_MONIPAN;
            if (INTERNET){
                WS_URL = WS_URL_SHIPAN;
            }
            URI uri = new URI(WS_URL);
            webSocketClient = new WebSocketClient(uri) {
                @Override
                public void onOpen(ServerHandshake handshake) {
                    log.info("OKX account-order WebSocket连接成功");
                    // 检查应用是否正在关闭
                    if (!sharedExecutor.isShutdown()) {
                        resetHeartbeatTimer();
                        websocketLogin();
                    } else {
                        log.warn("应用正在关闭，忽略WebSocket连接成功回调");
                    }
                }

                @Override
                public void onMessage(String message) {
                    lastMessageTime.set(System.currentTimeMillis());
                    handleWebSocketMessage(message);
                    resetHeartbeatTimer();
                }

                @Override
                public void onClose(int code, String reason, boolean remote) {
                    log.warn("OKX account-order WebSocket连接关闭: code={}, reason={}", code, reason);
                    cancelPongTimeout();

                    if (sharedExecutor != null && !sharedExecutor.isShutdown() && !sharedExecutor.isTerminated()) {
                        sharedExecutor.execute(() -> {
                            try {
                                reconnectWithBackoff();
                            } catch (InterruptedException e) {
                                Thread.currentThread().interrupt();
                                log.error("重连线程被中断", e);
                            } catch (Exception e) {
                                log.error("重连失败", e);
                            }
                        });
                    } else {
                        log.warn("共享线程池已关闭，无法执行重连任务");
                    }
                }

                @Override
                public void onError(Exception ex) {
                    log.error("OKX account-order WebSocket发生错误", ex);
                }
            };

            webSocketClient.connect();
        } catch (URISyntaxException e) {
            log.error("WebSocket URI格式错误", e);
        }
    }

    private void websocketLogin() {
        LoginWs.websocketLogin(webSocketClient);
    }

    private void subscribeBalanceAndPositionChannel(String option) {
        BalanceAndPositionWs.subscribeBalanceAndPositionChannel(webSocketClient, option);
    }

    private void subscribeOrderInfoChannel(String option) {
        OrderInfoWs.subscribeOrderInfoChannel(webSocketClient, option);
    }

    private void subscribeAccountChannel(String option) {
        AccountWs.subscribeAccountChannel(webSocketClient, option);
    }

    private void subscribePositionChannel(String option) {
        PositionsWs.subscribePositionChannel(webSocketClient, option);
    }

    /**
     * 处理从 WebSocket 收到的消息。
     * 包括订阅确认、错误响应、心跳响应以及实际的数据推送。
     *
     * @param message 来自 WebSocket 的原始字符串消息
     */
    private void handleWebSocketMessage(String message) {
        try {
            if ("pong".equals(message)) {
                log.info("收到心跳响应");
                cancelPongTimeout();
                return;
            }
            JSONObject response = JSON.parseObject(message);
            String event = response.getString("event");

            if ("login".equals(event)) {
                String code = response.getString("code");
                if ("0".equals(code)) {
                    String connId = response.getString("connId");
                    log.info("WebSocket登录成功, connId: {}", connId);
                    subscribeAccountChannel(SUBSCRIBE);
                    subscribeOrderInfoChannel(SUBSCRIBE);
                    subscribePositionChannel(SUBSCRIBE);
                } else {
                    log.error("WebSocket登录失败, code: {}, msg: {}", code, response.getString("msg"));
                }
            } else if ("subscribe".equals(event)) {
                log.info("订阅成功: {}", response.getJSONObject("arg"));
            } else if ("error".equals(event)) {
                log.error("订阅错误: code={}, msg={}",
                         response.getString("code"), response.getString("msg"));
            } else if ("channel-conn-count".equals(event)) {
                log.info("连接限制更新: channel={}, connCount={}",
                         response.getString("channel"), response.getString("connCount"));
            } else {
                processPushData(response);
            }
        } catch (Exception e) {
            log.error("处理WebSocket消息失败: {}", message, e);
        }
    }

    /**
     * 解析并处理价格推送数据。
     * 将最新的标记价格存入 Redis 并触发后续业务逻辑比较处理。
     *
     * @param response 包含价格数据的 JSON 对象
     */
    private void processPushData(JSONObject response) {
        JSONObject arg = response.getJSONObject("arg");
        if (arg == null) {
            log.warn("无效的推送数据，缺少 'arg' 字段");
            return;
        }

        String channel = arg.getString("channel");
        if (channel == null) {
            log.warn("无效的推送数据，缺少 'channel' 字段");
            return;
        }

        if (OrderInfoWs.ORDERINFOWS_CHANNEL.equals(channel)) {
            OrderInfoWs.handleEvent(response, redisUtils);
        }else if (AccountWs.ACCOUNTWS_CHANNEL.equals(channel)) {
            AccountWs.handleEvent(response, redisUtils);
        } else if (PositionsWs.POSITIONSWS_CHANNEL.equals(channel)) {
            PositionsWs.handleEvent(response, redisUtils);

            String posKey = PositionsWs.POSITIONSWS_CHANNEL + ":" + CoinEnums.HE_YUE.getCode() + ":pos";
            String pos = (String) redisUtils.get(posKey);
            if (StrUtil.isBlank(pos)) {
                log.error("未获取到持仓数量");
                TradeOrderWs.orderEvent(webSocketClient, redisUtils, OrderParamEnums.INIT.getValue());
                return;
            }

            String state = (String) redisUtils.get(InstrumentsWs.INSTRUMENTSWS_CHANNEL + ":" + CoinEnums.HE_YUE.getCode() + ":state");
            String uplKey = PositionsWs.POSITIONSWS_CHANNEL + ":" + CoinEnums.HE_YUE.getCode() + ":upl";
            String totalOrderUsdtKey = AccountWs.ACCOUNTWS_CHANNEL + ":" + CoinEnums.USDT.getCode() + ":totalOrderUsdt";

            String upl =  ObjectUtil.isEmpty(redisUtils.get(uplKey)) ? "0" : (String)redisUtils.get(uplKey);

            String totalOrderUsdt = (String) redisUtils.get(totalOrderUsdtKey);
            BigDecimal multiply = new BigDecimal(upl).multiply(new BigDecimal("-1"));

            if (new BigDecimal(totalOrderUsdt).compareTo(multiply) < 0 || OrderParamEnums.STATE_3.getValue().equals(state)) {
                log.error("持仓盈亏超过下单总保证金，止损冷静一天......");
                TradeOrderWs.orderEvent(webSocketClient, redisUtils, OrderParamEnums.OUT.getValue());
                return;
            }

            String side = caoZuoService.caoZuo();
            if (StrUtil.isNotBlank(pos)) {
                TradeOrderWs.orderEvent(webSocketClient, redisUtils, side);
            }
        } else if (BalanceAndPositionWs.CHANNEL_NAME.equals(channel)) {
            BalanceAndPositionWs.handleEvent(response);
        }
    }

    /**
     * 启动心跳检测任务。
     * 使用 ScheduledExecutorService 定期检查是否需要发送 ping 请求来维持连接。
     */
    private void startHeartbeat() {
        if (heartbeatExecutor != null && !heartbeatExecutor.isTerminated()) {
            heartbeatExecutor.shutdownNow();
        }

        heartbeatExecutor = Executors.newSingleThreadScheduledExecutor(r -> {
            Thread t = new Thread(r, "okx-account-order-heartbeat");
            t.setDaemon(true);
            return t;
        });

        heartbeatExecutor.scheduleWithFixedDelay(this::checkHeartbeatTimeout, 25, 25, TimeUnit.SECONDS);
    }

    /**
     * 重置心跳计时器。
     * 当收到新消息或发送 ping 后取消当前超时任务并重新安排下一次超时检查。
     */
    private void resetHeartbeatTimer() {
        cancelPongTimeout();

        // 检查线程池状态，避免在关闭过程中提交任务
        if (heartbeatExecutor != null && !heartbeatExecutor.isShutdown()) {
            pongTimeoutFuture = heartbeatExecutor.schedule(this::checkHeartbeatTimeout,
                    HEARTBEAT_TIMEOUT, TimeUnit.SECONDS);
        }
    }

    /**
     * 检查心跳超时情况。
     * 若长时间未收到任何消息则主动发送 ping 请求保持连接活跃。
     */
    private void checkHeartbeatTimeout() {
        long currentTime = System.currentTimeMillis();
        long lastTime = lastMessageTime.get();

        if (currentTime - lastTime >= HEARTBEAT_TIMEOUT * 1000L) {
            sendPing();
        }
    }

    /**
     * 发送 ping 请求至 WebSocket 服务端。
     * 用于维持长连接有效性。
     */
    private void sendPing() {
        try {
            if (webSocketClient != null && webSocketClient.isOpen()) {
                webSocketClient.send("ping");
                log.debug("发送ping请求");
            }
        } catch (Exception e) {
            log.warn("发送ping失败", e);
        }
    }

    /**
     * 取消当前的心跳超时任务。
     * 在收到 pong 或其他有效消息时调用此方法避免不必要的断开重连。
     */
    private void cancelPongTimeout() {
        if (pongTimeoutFuture != null && !pongTimeoutFuture.isDone()) {
            pongTimeoutFuture.cancel(true);
        }
    }

    /**
     * 执行 WebSocket 重连操作。
     * 在连接意外中断后尝试重新建立连接。
     */
    private void reconnectWithBackoff() throws InterruptedException {
        int attempt = 0;
        int maxAttempts = 5;
        long delayMs = 1000;

        while (attempt < maxAttempts) {
            try {
                Thread.sleep(delayMs);
                connect();
                return;
            } catch (Exception e) {
                log.warn("第{}次重连失败", attempt + 1, e);
                delayMs *= 2;
                attempt++;
            }
        }

        log.error("超过最大重试次数({})仍未连接成功", maxAttempts);
    }
}