/*
 * Copyright 2023-2024 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.oracle.autoconfigure;

import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.Map;

import io.micrometer.observation.tck.TestObservationRegistry;
import org.junit.jupiter.api.Test;
import org.testcontainers.junit.jupiter.Container;
import org.testcontainers.junit.jupiter.Testcontainers;
import org.testcontainers.oracle.OracleContainer;
import org.testcontainers.utility.MountableFile;

import org.springframework.ai.document.Document;
import org.springframework.ai.embedding.EmbeddingModel;
import org.springframework.ai.observation.conventions.VectorStoreProvider;
import org.springframework.ai.test.vectorstore.ObservationTestUtil;
import org.springframework.ai.transformers.TransformersEmbeddingModel;
import org.springframework.ai.vectorstore.SearchRequest;
import org.springframework.ai.vectorstore.VectorStore;
import org.springframework.ai.vectorstore.observation.VectorStoreObservationContext;
import org.springframework.ai.vectorstore.oracle.OracleVectorStore;
import org.springframework.boot.autoconfigure.AutoConfigurations;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.boot.autoconfigure.jdbc.JdbcTemplateAutoConfiguration;
import org.springframework.boot.test.context.runner.ApplicationContextRunner;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.DefaultResourceLoader;

import static org.assertj.core.api.Assertions.assertThat;

/**
 * @author Christian Tzolov
 * @author Eddú Meléndez
 * @author Thomas Vitale
 */
@Testcontainers
public class OracleVectorStoreAutoConfigurationIT {

	@Container
	static OracleContainer oracle23aiContainer = new OracleContainer("gvenzl/oracle-free:23-slim")
		.withCopyFileToContainer(MountableFile.forClasspathResource("/oracle/initialize.sql"),
				"/container-entrypoint-initdb.d/initialize.sql");

	private final ApplicationContextRunner contextRunner = new ApplicationContextRunner()
		.withConfiguration(AutoConfigurations.of(OracleVectorStoreAutoConfiguration.class,
				JdbcTemplateAutoConfiguration.class, DataSourceAutoConfiguration.class))
		.withUserConfiguration(Config.class)
		.withPropertyValues("test.spring.ai.vectorstore.oracle.distanceType=COSINE",
				"spring.ai.vectorstore.oracle.initialize-schema=true",
				"test.spring.ai.vectorstore.oracle.dimensions=384",
				// JdbcTemplate configuration
				String.format("spring.datasource.url=%s", oracle23aiContainer.getJdbcUrl()),
				String.format("spring.datasource.username=%s", oracle23aiContainer.getUsername()),
				String.format("spring.datasource.password=%s", oracle23aiContainer.getPassword()),
				"spring.datasource.type=oracle.jdbc.pool.OracleDataSource");

	List<Document> documents = List.of(
			new Document(getText("classpath:/test/data/spring.ai.txt"), Map.of("spring", "great")),
			new Document(getText("classpath:/test/data/time.shelter.txt")),
			new Document(getText("classpath:/test/data/great.depression.txt"), Map.of("depression", "bad")));

	public static String getText(String uri) {
		var resource = new DefaultResourceLoader().getResource(uri);
		try {
			return resource.getContentAsString(StandardCharsets.UTF_8);
		}
		catch (IOException e) {
			throw new RuntimeException(e);
		}
	}

	@Test
	public void addAndSearch() {
		this.contextRunner.run(context -> {

			VectorStore vectorStore = context.getBean(VectorStore.class);
			TestObservationRegistry observationRegistry = context.getBean(TestObservationRegistry.class);

			vectorStore.add(this.documents);

			ObservationTestUtil.assertObservationRegistry(observationRegistry, VectorStoreProvider.ORACLE,
					VectorStoreObservationContext.Operation.ADD);
			observationRegistry.clear();

			List<Document> results = vectorStore
				.similaritySearch(SearchRequest.builder().query("What is Great Depression?").topK(1).build());

			assertThat(results).hasSize(1);
			Document resultDoc = results.get(0);
			assertThat(resultDoc.getId()).isEqualTo(this.documents.get(2).getId());
			assertThat(resultDoc.getMetadata()).containsKeys("depression", "distance");

			ObservationTestUtil.assertObservationRegistry(observationRegistry, VectorStoreProvider.ORACLE,
					VectorStoreObservationContext.Operation.QUERY);
			observationRegistry.clear();

			// Remove all documents from the store
			vectorStore.delete(this.documents.stream().map(doc -> doc.getId()).toList());

			ObservationTestUtil.assertObservationRegistry(observationRegistry, VectorStoreProvider.ORACLE,
					VectorStoreObservationContext.Operation.DELETE);
			observationRegistry.clear();

			results = vectorStore.similaritySearch(SearchRequest.builder().query("Great Depression").topK(1).build());
			assertThat(results).hasSize(0);
		});
	}

	@Test
	public void autoConfigurationDisabledWhenTypeIsNone() {
		this.contextRunner.withPropertyValues("spring.ai.vectorstore.type=none").run(context -> {
			assertThat(context.getBeansOfType(OracleVectorStoreProperties.class)).isEmpty();
			assertThat(context.getBeansOfType(OracleVectorStore.class)).isEmpty();
			assertThat(context.getBeansOfType(VectorStore.class)).isEmpty();
		});
	}

	@Test
	public void autoConfigurationEnabledByDefault() {
		this.contextRunner.run(context -> {
			assertThat(context.getBeansOfType(OracleVectorStoreProperties.class)).isNotEmpty();
			assertThat(context.getBeansOfType(VectorStore.class)).isNotEmpty();
			assertThat(context.getBean(VectorStore.class)).isInstanceOf(OracleVectorStore.class);
		});
	}

	@Test
	public void autoConfigurationEnabledWhenTypeIsOracle() {
		this.contextRunner.withPropertyValues("spring.ai.vectorstore.type=oracle").run(context -> {
			assertThat(context.getBeansOfType(OracleVectorStoreProperties.class)).isNotEmpty();
			assertThat(context.getBeansOfType(VectorStore.class)).isNotEmpty();
			assertThat(context.getBean(VectorStore.class)).isInstanceOf(OracleVectorStore.class);
		});
	}

	@Configuration(proxyBeanMethods = false)
	static class Config {

		@Bean
		public TestObservationRegistry observationRegistry() {
			return TestObservationRegistry.create();
		}

		@Bean
		public EmbeddingModel embeddingModel() {
			return new TransformersEmbeddingModel();
		}

	}

}
