package org.example.mexcclient.wsClient;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ArrayNode;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.google.common.reflect.TypeToken;
import com.google.gson.Gson;
import com.google.gson.JsonSyntaxException;
import lombok.extern.slf4j.Slf4j;
import org.example.mexcclient.pojo.Currency;
import org.example.mexcclient.util.RedisUtil;

import javax.websocket.*;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.lang.reflect.Type;
import java.math.BigDecimal;
import java.net.URI;
import java.nio.ByteBuffer;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.*;

@ClientEndpoint
@Slf4j
public class MexcClient {
    private static final String WS_ENDPOINT = "wss://wbs.mexc.com/ws";
    private static final long PING_INTERVAL = 20000;

    private final List<Currency> subscriptions;
    private final ScheduledExecutorService executorService;
    private Session session;

    private final Object lock = new Object(); // 添加一个锁对象
    private volatile boolean reconnecting = false; // 使用 volatile 关键字保证可见性

    public MexcClient(List<Currency> subscriptions) {
        this.subscriptions = subscriptions;
        this.executorService = Executors.newScheduledThreadPool(1);
    }

    public void start() {
        try {
            connect();
            if (session == null) {
                log.info("无法在超时时间内连接到服务器。");
                return;
            }

            executorService.scheduleAtFixedRate(this::sendPing, PING_INTERVAL, PING_INTERVAL, TimeUnit.MILLISECONDS);

            // 订阅消息
            for (Currency subscription : subscriptions) {
                String parameter = getParameter(subscription.getSymbol());
                session.getBasicRemote().sendText(parameter);
            }

            synchronized (this) {
                this.wait();
            }

        } catch (Exception e) {
            log.error("mexc ws 连接过程中发生异常: " + e.getMessage(), e);
        } finally {
            executorService.shutdown();
        }
    }

    private void connect() throws Exception {
        WebSocketContainer container = ContainerProvider.getWebSocketContainer();
        container.connectToServer(this, new URI(WS_ENDPOINT));
    }

    @OnOpen
    public void onOpen(Session session) {
        log.info("mexc ws 已连接到服务器。");
        this.session = session;
        synchronized (this) {
            this.notify();
        }
    }
    private static final Gson gson = new Gson(); // 将 Gson 作为静态成员或单例

    @OnMessage
    public void onMessage(String message) {
        try {
            Map<String, Object> map = gson.fromJson(message, new TypeToken<Map<String, Object>>() {}.getType());


            if (map != null && map.containsKey("s")) {

                Object object = map.get("d");
                Map<String, Object> resultMap = gson.fromJson(object.toString(), new TypeToken<Map<String, Object>>() {}.getType());
                HashMap<String,Object> hashMap = new HashMap<>();
                Object asksObj = resultMap.get("asks");
                Object bidsObj = resultMap.get("bids");

                Type listType = new TypeToken<List<Map<String,Object>>>(){}.getType();
                List<Map<String,Object>> asksList = gson.fromJson(asksObj.toString(), listType);
                List<Map<String,Object>> bidsList = gson.fromJson(bidsObj.toString(), listType);


                if(!asksList.isEmpty() && !asksList.get(0).isEmpty() && !bidsList.isEmpty() && !bidsList.get(0).isEmpty()){
                    if (!asksList.isEmpty() && !asksList.get(0).isEmpty()) {

                        Map<String,Object> objectMap = asksList.get(0);
                        HashMap<String, Object> pvMap = new HashMap<>(); // 创建新的 HashMap 保存 bids 和 asks
                        pvMap.put("p", new BigDecimal(objectMap.get("p").toString()).toPlainString());
                        pvMap.put("v", new BigDecimal(objectMap.get("v").toString()).toPlainString());
                        hashMap.put("asks", pvMap);
                    }

                    if (!bidsList.isEmpty() && !bidsList.get(0).isEmpty()) {
                        Map<String,Object> objectMap = bidsList.get(0);
                        HashMap<String, Object> pvMap = new HashMap<>(); // 创建新的 HashMap 保存 bids 和 asks
                        pvMap.put("p", new BigDecimal(objectMap.get("p").toString()).toPlainString());
                        pvMap.put("v", new BigDecimal(objectMap.get("v").toString()).toPlainString());
                        hashMap.put("bids", pvMap);
                    }

                    ObjectMapper mapper = new ObjectMapper();
                    String key = "mexc" + map.get("s").toString();
                    try {
                        RedisUtil.set(key, mapper.writeValueAsString(hashMap));
                    } catch (JsonProcessingException e) {
                        e.printStackTrace();
                    }
                }
            }
        } catch (JsonSyntaxException e) {
            log.error("JSON 解析异常：" + e.getMessage(), e);
        }
    }

    @OnClose
    public void onClose() {
        log.info("mexc ws 连接已关闭，尝试重新连接...");
        handleConnectionClosedOrError();
    }

    @OnError
    public void onError(Throwable throwable) {
        log.error("mexc ws 发生错误: " + throwable.getMessage(), throwable);
        handleConnectionClosedOrError();
    }

    private void handleConnectionClosedOrError() {
        synchronized (lock) {
            if (!reconnecting) {
                reconnecting = true; // 设置 reconnecting 为 true 表示开始重连
                executorService.execute(this::attemptReconnect); // 使用 execute 方法立即执行重连
            }
        }
    }

    private void attemptReconnect() {
        boolean doReconnect = true;
        try {
            log.info("mexc ws 开始重连");
            connect(); // 假设 connect() 方法用于实际的连接逻辑
            log.info("mexc ws 重连成功");
        } catch (Exception e) {
            log.error("mexc ws 重连失败", e);
            // 连接失败时，可以根据具体情况决定是否继续重连
            // 在这里假设总是继续尝试重连
        } finally {
            synchronized (lock) {
                if (doReconnect) {
                    scheduleReconnect(); // 如果需要继续重连，则重新调度重连任务
                } else {
                    reconnecting = false; // 重连结束后设置 reconnecting 为 false
                }
            }
        }
    }

    private void scheduleReconnect() {
        if (!executorService.isShutdown()) {
            executorService.schedule(this::attemptReconnect, 5, TimeUnit.SECONDS);
        }
    }

    private void sendPing() {
        try {
            if (session != null) {
                session.getBasicRemote().sendPing(ByteBuffer.wrap("Ping".getBytes()));
            }
        } catch (Exception e) {
            log.error("发送心跳失败", e);
        }
    }

    public String getParameter(String symbol) throws JsonProcessingException {
        ObjectMapper mapper = new ObjectMapper();
        ObjectNode root = mapper.createObjectNode();

        root.put("method", "SUBSCRIPTION");
        ArrayNode paramsArray = mapper.createArrayNode();
        String customParam = String.format("spot@public.limit.depth.v3.api@%s@5", symbol);
        paramsArray.add(customParam);
        root.set("params", paramsArray);

        return mapper.writerWithDefaultPrettyPrinter().writeValueAsString(root);
    }
}