/*
 * Copyright 2023-2025 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 org.springframework.ai.vectorstore.chroma.autoconfigure;

import com.fasterxml.jackson.databind.ObjectMapper;
import io.micrometer.observation.ObservationRegistry;

import org.springframework.ai.chroma.vectorstore.ChromaApi;
import org.springframework.ai.chroma.vectorstore.ChromaVectorStore;
import org.springframework.ai.embedding.BatchingStrategy;
import org.springframework.ai.embedding.EmbeddingModel;
import org.springframework.ai.embedding.TokenCountBatchingStrategy;
import org.springframework.ai.vectorstore.SpringAIVectorStoreTypes;
import org.springframework.ai.vectorstore.observation.VectorStoreObservationConvention;
import org.springframework.beans.factory.ObjectProvider;
import org.springframework.boot.autoconfigure.AutoConfiguration;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.util.StringUtils;
import org.springframework.web.client.RestClient;

/**
 * {@link AutoConfiguration Auto-configuration} for Chroma Vector Store.
 *
 * @author Christian Tzolov
 * @author Eddú Meléndez
 * @author Soby Chacko
 * @author Sebastien Deleuze
 */
@AutoConfiguration
@ConditionalOnClass({ EmbeddingModel.class, RestClient.class, ChromaVectorStore.class, ObjectMapper.class })
@EnableConfigurationProperties({ ChromaApiProperties.class, ChromaVectorStoreProperties.class })
@ConditionalOnProperty(name = SpringAIVectorStoreTypes.TYPE, havingValue = SpringAIVectorStoreTypes.CHROMA,
		matchIfMissing = true)
public class ChromaVectorStoreAutoConfiguration {

	@Bean
	@ConditionalOnMissingBean(ChromaConnectionDetails.class)
	PropertiesChromaConnectionDetails chromaConnectionDetails(ChromaApiProperties properties) {
		return new PropertiesChromaConnectionDetails(properties);
	}

	@Bean
	@ConditionalOnMissingBean
	public ChromaApi chromaApi(ChromaApiProperties apiProperties,
			ObjectProvider<RestClient.Builder> restClientBuilderProvider, ChromaConnectionDetails connectionDetails,
			ObjectMapper objectMapper) {

		String chromaUrl = String.format("%s:%s", connectionDetails.getHost(), connectionDetails.getPort());

		var chromaApi = ChromaApi.builder()
			.baseUrl(chromaUrl)
			.restClientBuilder(restClientBuilderProvider.getIfAvailable(RestClient::builder))
			.objectMapper(objectMapper)
			.build();

		if (StringUtils.hasText(connectionDetails.getKeyToken())) {
			chromaApi.withKeyToken(connectionDetails.getKeyToken());
		}
		else if (StringUtils.hasText(apiProperties.getUsername()) && StringUtils.hasText(apiProperties.getPassword())) {
			chromaApi.withBasicAuthCredentials(apiProperties.getUsername(), apiProperties.getPassword());
		}

		return chromaApi;
	}

	@Bean
	@ConditionalOnMissingBean(BatchingStrategy.class)
	BatchingStrategy chromaBatchingStrategy() {
		return new TokenCountBatchingStrategy();
	}

	@Bean
	@ConditionalOnMissingBean
	public ChromaVectorStore vectorStore(EmbeddingModel embeddingModel, ChromaApi chromaApi,
			ChromaVectorStoreProperties storeProperties, ObjectProvider<ObservationRegistry> observationRegistry,
			ObjectProvider<VectorStoreObservationConvention> customObservationConvention,
			BatchingStrategy chromaBatchingStrategy) {
		return ChromaVectorStore.builder(chromaApi, embeddingModel)
			.collectionName(storeProperties.getCollectionName())
			.databaseName(storeProperties.getDatabaseName())
			.tenantName(storeProperties.getTenantName())
			.initializeSchema(storeProperties.isInitializeSchema())
			.observationRegistry(observationRegistry.getIfUnique(() -> ObservationRegistry.NOOP))
			.customObservationConvention(customObservationConvention.getIfAvailable(() -> null))
			.batchingStrategy(chromaBatchingStrategy)
			.build();
	}

	static class PropertiesChromaConnectionDetails implements ChromaConnectionDetails {

		private final ChromaApiProperties properties;

		PropertiesChromaConnectionDetails(ChromaApiProperties properties) {
			this.properties = properties;
		}

		@Override
		public String getHost() {
			return this.properties.getHost();
		}

		@Override
		public int getPort() {
			return this.properties.getPort();
		}

		@Override
		public String getKeyToken() {
			return this.properties.getKeyToken();
		}

	}

}
