/*
 * Copyright 2024-2026 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.cloud.ai.studio.admin.tracing;

import io.micrometer.tracing.Tracer;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import java.util.Objects;

@Component
public class TraceIdInterceptor implements HandlerInterceptor {

	private final Tracer tracer;

	public TraceIdInterceptor(Tracer tracer) {
		this.tracer = tracer;
	}

	@Override
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
			throws Exception {
		if (tracer.currentSpan() != null) {
			String traceId = Objects.requireNonNull(tracer.currentSpan()).context().traceId();
			response.setHeader("X-Request-ID", traceId);
		}
		return true;
	}

}
