package com.ltkj.web.websocket.interceptor;

import com.ltkj.common.core.domain.model.LoginUser;
import com.ltkj.framework.web.service.TokenService;
import io.jsonwebtoken.Claims;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.server.HandshakeInterceptor;

import java.net.URI;
import java.util.Map;

@Component
public class TokenHandshakeInterceptor implements HandshakeInterceptor {
    @Autowired
    private TokenService tokenService;

    @Override
    public boolean beforeHandshake(ServerHttpRequest request,
                                   ServerHttpResponse response,
                                   WebSocketHandler wsHandler,
                                   Map<String, Object> attributes) {
        URI uri = request.getURI();
        String query = uri.getQuery();
        String token = null;
        if (query != null && query.startsWith("token=")) {
            token = query.substring("token=".length());
        }
        if (token == null) {
            System.out.println("[WebSocket] 令牌无效拒绝");
            return false;
        }
        LoginUser validToken = isValidToken(token);
        if (validToken == null) {
            System.out.println("[WebSocket] 令牌无效拒绝");
            return false;
        }
        attributes.put("user", validToken);
        return true;
    }

    @Override
    public void afterHandshake(ServerHttpRequest request,
                               ServerHttpResponse response,
                               WebSocketHandler wsHandler,
                               Exception exception) {
    }

    private LoginUser isValidToken(String token) {
        String tokenStr = token.replace("Bearer", "").trim();
        Claims claims = tokenService.parseToken(tokenStr);
        return tokenService.getLoginUser(claims);
    }


}