/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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
 *
 *     http://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 org.apache.skywalking.apm.plugin.spring.ai.v1;

import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.EnhancedInstance;
import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.InstanceMethodsAroundInterceptor;
import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.MethodInterceptResult;
import org.apache.skywalking.apm.plugin.spring.ai.v1.common.EmbeddingModelEnhanceContext;
import org.springframework.ai.embedding.EmbeddingResponse;
import org.springframework.ai.embedding.EmbeddingResponseMetadata;
import org.springframework.util.StringUtils;

import java.lang.reflect.Method;

public class EmbeddingModelInterceptor implements InstanceMethodsAroundInterceptor {

    @Override
    public void beforeMethod(EnhancedInstance objInst, Method method, Object[] allArguments, Class<?>[] argumentsTypes, MethodInterceptResult result) {

    }

    @Override
    public Object afterMethod(EnhancedInstance objInst, Method method, Object[] allArguments, Class<?>[] argumentsTypes, Object ret) {
        if (!(ret instanceof EmbeddingResponse)) {
            return ret;
        }

        EmbeddingResponseMetadata metadata = ((EmbeddingResponse) ret).getMetadata();
        if (metadata == null) {
            return ret;
        }
        String model = metadata.getModel();
        if (!StringUtils.hasText(model)) {
            return ret;
        }
        EmbeddingModelEnhanceContext context = getOrCreateContext(objInst);
        context.setEmbeddingModelNameIfAbsent(model);
        return ret;
    }

    @Override
    public void handleMethodException(EnhancedInstance objInst, Method method, Object[] allArguments, Class<?>[] argumentsTypes, Throwable t) {
    }

    private EmbeddingModelEnhanceContext getOrCreateContext(EnhancedInstance objInst) {
        Object context = objInst.getSkyWalkingDynamicField();
        if (context instanceof EmbeddingModelEnhanceContext) {
            return (EmbeddingModelEnhanceContext) context;
        }
        EmbeddingModelEnhanceContext embeddingModelEnhanceContext = new EmbeddingModelEnhanceContext();
        objInst.setSkyWalkingDynamicField(embeddingModelEnhanceContext);
        return embeddingModelEnhanceContext;
    }
}
