package com.walker.tcp.websocket;

import com.walker.infrastructure.ApplicationRuntimeException;
import com.walker.infrastructure.utils.ClassUtils;
import com.walker.infrastructure.utils.StringUtils;
import com.walker.tcp.Request;
import com.walker.tcp.data.AbstractStringRequest;
import com.walker.tcp.handler.LongHandler;
import com.walker.tcp.protocol.StringProtocolResolver;

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

public class WebsocketHandler extends LongHandler {

//	private final ProtocolResolver resolver = new WebsocketProtocolResolver();
	private final StringProtocolResolver resolver = new WebsocketProtocolResolver();

	@Override
	protected Request<?> createRequest(String content) throws Exception {
		if(this.getMapper() == null){
			throw new IllegalArgumentException(MSG_REQUEST_ERROR);
		}

//		ProtocolResolver resolver = ConvertorUtils.getProtocolResolver(msg, getProtocolResolverList());
//		if(resolver == null){
//			throw new IllegalArgumentException("protocolResolver not found, msg : " + msg);
//		}

		// 去掉报文中的分隔符，因为netty打开了显示分隔符
//		String content = msg.substring(0, msg.length()-resolver.getDelimiter().length());

		String protocol = resolver.getProtocolNum(content, content.length());
		String clazz = this.getMapper().get(protocol);
		if(StringUtils.isEmpty(clazz)){
			throw new IllegalArgumentException("请求协议对应的request类不存在。protocol = " + protocol + ", msg = " + content);
		}

		Class<?> clazzRequest = this.acquireRequestClazz(clazz);
		AbstractStringRequest request = (AbstractStringRequest)clazzRequest.newInstance();
		request.fromSource(content);
		request.setProtocolResolverId(resolver.getOrder());
		return request;

//		try {
//			Class<?> clazzRequest = ClassUtils.forName(clazz, this.getClass().getClassLoader());
//			AbstractStringRequest request = (AbstractStringRequest)clazzRequest.newInstance();
//			request.fromSource(content);
//			request.setProtocolResolverId(resolver.getOrder());
//			return request;
//
//		} catch (ClassNotFoundException e) {
//			logger.error("根据映射创建request对象错误：" + e.getMessage(), e);
//			throw new Exception(e);
//		}
	}

	private Class<?> acquireRequestClazz(String clazz){
		if(StringUtils.isEmpty(clazz)){
			throw new IllegalArgumentException("必须提供请求对象class名称!");
		}
		Class<?> requestClazz = this.requestClazzCache.get(clazz);
		if(requestClazz == null){
			try {
				requestClazz = ClassUtils.forName(clazz, this.getClass().getClassLoader());
				this.requestClazzCache.put(clazz, requestClazz);
			} catch (ClassNotFoundException e) {
				throw new ApplicationRuntimeException("tcp request class not found: " + clazz, e);
			}
		}
		return requestClazz;
	}

	private Map<String, Class<?>> requestClazzCache = new ConcurrentHashMap<>();
}