package com.qianwen.core.websocket.config;

import java.util.List;
import javax.annotation.PostConstruct;
import com.qianwen.core.websocket.custom.SubscriptionSessionFilter;
import com.qianwen.core.websocket.handler.JsonMessageHandler;
import com.qianwen.core.websocket.holder.JsonMessageFilterHolder;
import com.qianwen.core.websocket.holder.JsonMessageHandlerHolder;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.config.annotation.EnableWebSocket;
import org.springframework.web.socket.config.annotation.WebSocketConfigurer;
import org.springframework.web.socket.server.HandshakeInterceptor;

@Configuration
@Import({WebSocketHandlerConfig.class})
@EnableWebSocket
public class WebSocketAutoConfiguration {
    private final WebSocketProperties webSocketProperties;
    private final List<JsonMessageHandler> jsonMessageHandlerList;
    private final List<SubscriptionSessionFilter> jsonMessageFilterList;

    public WebSocketAutoConfiguration(final WebSocketProperties webSocketProperties, final List<JsonMessageHandler> jsonMessageHandlerList, final List<SubscriptionSessionFilter> jsonMessageFilterList) {
        this.webSocketProperties = webSocketProperties;
        this.jsonMessageHandlerList = jsonMessageHandlerList;
        this.jsonMessageFilterList = jsonMessageFilterList;
    }

    @ConditionalOnMissingBean
    @Bean
    public WebSocketConfigurer webSocketConfigurer(List<HandshakeInterceptor> handshakeInterceptor, WebSocketHandler webSocketHandler) {
        return registry -> {
        	//普通websocket支持
            registry.addHandler(webSocketHandler, new String[]{this.webSocketProperties.getPath()}).setAllowedOrigins(new String[]{this.webSocketProperties.getAllowOrigins()}).addInterceptors((HandshakeInterceptor[]) handshakeInterceptor.toArray(new HandshakeInterceptor[0]));
            //提供降级为SockJS的支持
            registry.addHandler(webSocketHandler, new String[]{this.webSocketProperties.getSockJsPath()}).setAllowedOrigins(new String[]{this.webSocketProperties.getAllowOrigins()}).addInterceptors((HandshakeInterceptor[]) handshakeInterceptor.toArray(new HandshakeInterceptor[0])).withSockJS();
        };
    }

    @PostConstruct
    public void initJsonMessageHandlerHolder() {
        for (JsonMessageHandler jsonMessageHandler : this.jsonMessageHandlerList) {
            JsonMessageHandlerHolder.addHandler(jsonMessageHandler);
        }
        for (SubscriptionSessionFilter filter : this.jsonMessageFilterList) {
            JsonMessageFilterHolder.addFilter(filter);
        }
    }
}