/*
 * Copyright 2025-2025 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.chat.client.advisor.vectorstore;

import org.junit.jupiter.api.Test;
import org.mockito.Mockito;

import org.springframework.ai.vectorstore.VectorStore;

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

/**
 * Unit tests for {@link VectorStoreChatMemoryAdvisor}.
 *
 * @author Thomas Vitale
 */
class VectorStoreChatMemoryAdvisorTests {

	@Test
	void whenVectorStoreIsNullThenThrow() {
		assertThatThrownBy(() -> VectorStoreChatMemoryAdvisor.builder(null).build())
			.isInstanceOf(IllegalArgumentException.class)
			.hasMessageContaining("vectorStore cannot be null");
	}

	@Test
	void whenDefaultConversationIdIsNullThenThrow() {
		VectorStore vectorStore = Mockito.mock(VectorStore.class);

		assertThatThrownBy(() -> VectorStoreChatMemoryAdvisor.builder(vectorStore).conversationId(null).build())
			.isInstanceOf(IllegalArgumentException.class)
			.hasMessageContaining("defaultConversationId cannot be null or empty");
	}

	@Test
	void whenDefaultConversationIdIsEmptyThenThrow() {
		VectorStore vectorStore = Mockito.mock(VectorStore.class);

		assertThatThrownBy(() -> VectorStoreChatMemoryAdvisor.builder(vectorStore).conversationId(null).build())
			.isInstanceOf(IllegalArgumentException.class)
			.hasMessageContaining("defaultConversationId cannot be null or empty");
	}

	@Test
	void whenSchedulerIsNullThenThrow() {
		VectorStore vectorStore = Mockito.mock(VectorStore.class);

		assertThatThrownBy(() -> VectorStoreChatMemoryAdvisor.builder(vectorStore).scheduler(null).build())
			.isInstanceOf(IllegalArgumentException.class)
			.hasMessageContaining("scheduler cannot be null");
	}

	@Test
	void whenSystemPromptTemplateIsNullThenThrow() {
		VectorStore vectorStore = Mockito.mock(VectorStore.class);

		assertThatThrownBy(() -> VectorStoreChatMemoryAdvisor.builder(vectorStore).systemPromptTemplate(null).build())
			.isInstanceOf(IllegalArgumentException.class)
			.hasMessageContaining("systemPromptTemplate cannot be null");
	}

	@Test
	void whenDefaultTopKIsZeroThenThrow() {
		VectorStore vectorStore = Mockito.mock(VectorStore.class);

		assertThatThrownBy(() -> VectorStoreChatMemoryAdvisor.builder(vectorStore).defaultTopK(0).build())
			.isInstanceOf(IllegalArgumentException.class)
			.hasMessageContaining("topK must be greater than 0");
	}

	@Test
	void whenDefaultTopKIsNegativeThenThrow() {
		VectorStore vectorStore = Mockito.mock(VectorStore.class);

		assertThatThrownBy(() -> VectorStoreChatMemoryAdvisor.builder(vectorStore).defaultTopK(-1).build())
			.isInstanceOf(IllegalArgumentException.class)
			.hasMessageContaining("topK must be greater than 0");
	}

}
