package com.tongran.agenttcp.server.basics;

import com.tongran.agenttcp.server.annotation.AgentDispatcher;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

@Component
public class AgentDispatcherManager implements ApplicationContextAware {

    /**
     * 所有实现的包处理器
     */
    private static Map<String, AgentMsgHandler> MSG_HANDLER_MAP;

    /**
     * 唤醒时 初始化 packHandlerMap
     */
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        // 仅一次性初始化完成
        if (MSG_HANDLER_MAP == null) {
            MSG_HANDLER_MAP = new ConcurrentHashMap<>();
            Map<String, Object> handlers = applicationContext.getBeansWithAnnotation(AgentDispatcher.class);
            if (!CollectionUtils.isEmpty(handlers)) {
                handlers.values().forEach(tempHandler -> {
                    boolean result = tempHandler.getClass().isAnnotationPresent(AgentDispatcher.class);
                    if (result) {
                        AgentDispatcher annotation = tempHandler.getClass().getAnnotation(AgentDispatcher.class);
                        MSG_HANDLER_MAP.put(annotation.msgId().getValue() + "&" + annotation.version().value, (AgentMsgHandler) tempHandler);
                    }
                });
            }
        }
    }

    public AgentMsgHandler getHandler(String msgIdVersion) {
        return MSG_HANDLER_MAP == null ? null : MSG_HANDLER_MAP.get(msgIdVersion);
    }

}