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package com.dalab.discovery.crawler.callable;

import static org.junit.jupiter.api.Assertions.*;
import static org.mockito.ArgumentMatchers.*;
import static org.mockito.Mockito.*;

import java.util.List;
import java.util.Map;
import java.util.UUID;

import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.mockito.junit.jupiter.MockitoExtension;

import com.dalab.discovery.catalog.persistence.IResourceCrawlerRegistry;
import com.dalab.discovery.catalog.service.ICatalogService;
import com.dalab.discovery.common.model.CloudResource;
import com.dalab.discovery.common.model.DiscoveryJob;
import com.dalab.discovery.common.model.enums.CloudProvider;
import com.dalab.discovery.crawler.service.IResourceCrawler;
import com.dalab.discovery.job.JobType;
import com.dalab.discovery.job.callable.ResourceCrawlerCallable;

/**
 * Unit tests for ResourceCrawlerCallable.
 */
@ExtendWith(MockitoExtension.class)
public class ResourceCrawlerCallableTest {

	@Mock
	private IResourceCrawlerRegistry crawlerRegistry;

	@Mock
	private IResourceCrawler<CloudResource> crawler1;

	@Mock
	private IResourceCrawler<CloudResource> crawler2;

	@Mock
	private ICatalogService catalogService;

	private DiscoveryJob job;
	private ResourceCrawlerCallable callable;
	private AutoCloseable closeable;

	@BeforeEach
	void setUp() {
		closeable = MockitoAnnotations.openMocks(this);
		job = new DiscoveryJob(UUID.randomUUID());
		job.setJobType(JobType.RESOURCE_CRAWLER);
		job.setCloudProvider(CloudProvider.GCP);
		job.setAccountId("test-account");
		callable = new ResourceCrawlerCallable(job, crawlerRegistry, catalogService);
	}

	@AfterEach
	void tearDown() throws Exception {
		closeable.close();
	}

	@Test
	void call_NoCrawlersFound_ReturnsFalse() throws Exception {
		when(crawlerRegistry.getCrawlersForProvider(CloudProvider.GCP)).thenReturn(List.of());

		Boolean result = callable.call();

		assertFalse(result);
		verify(crawlerRegistry).getCrawlersForProvider(CloudProvider.GCP);
		verifyNoInteractions(crawler1, crawler2, catalogService);
	}

	@Test
	void call_CrawlersFound_TriggersCrawlersAndReturnsTrue() throws Exception {
		when(crawlerRegistry.getCrawlersForProvider(CloudProvider.GCP)).thenReturn(List.of(crawler1, crawler2));
		doNothing().when(crawler1).discoverResourcesAsync(eq("test-account"), anyMap());
		doNothing().when(crawler2).discoverResourcesAsync(eq("test-account"), anyMap());

		Boolean result = callable.call();

		assertTrue(result);
		verify(crawlerRegistry).getCrawlersForProvider(CloudProvider.GCP);
		verify(crawler1).discoverResourcesAsync(eq("test-account"), anyMap());
		verify(crawler2).discoverResourcesAsync(eq("test-account"), anyMap());
	}

	@Test
	void call_WithSpecificResourceTypes_UsesGetCrawlersForTypes() throws Exception {
		List<String> typeNames = List.of("type1", "type2");
		job.setParameters(Map.of("resourceTypesToCrawl", typeNames));
		callable = new ResourceCrawlerCallable(job, crawlerRegistry, catalogService);

		when(crawlerRegistry.getCrawlersForTypes(eq(CloudProvider.GCP), anyList())).thenReturn(List.of(crawler1));
		doNothing().when(crawler1).discoverResourcesAsync(eq("test-account"), anyMap());

		Boolean result = callable.call();

		assertTrue(result);
		verify(crawlerRegistry).getCrawlersForTypes(eq(CloudProvider.GCP), anyList());
		verify(crawlerRegistry, never()).getCrawlersForProvider(any());
		verify(crawler1).discoverResourcesAsync(eq("test-account"), anyMap());
	}

	@Test
	void call_CrawlerTriggerFails_ContinuesAndReturnsTrueIfAnySucceed() throws Exception {
		when(crawlerRegistry.getCrawlersForProvider(CloudProvider.GCP)).thenReturn(List.of(crawler1, crawler2));
		doThrow(new RuntimeException("Trigger failed!")).when(crawler1).discoverResourcesAsync(anyString(), anyMap());
		doNothing().when(crawler2).discoverResourcesAsync(eq("test-account"), anyMap());

		Boolean result = callable.call();

		assertTrue(result);
		verify(crawler1).discoverResourcesAsync(eq("test-account"), anyMap());
		verify(crawler2).discoverResourcesAsync(eq("test-account"), anyMap());
	}

	@Test
	void call_AllCrawlerTriggersFail_ReturnsFalse() throws Exception {
		when(crawlerRegistry.getCrawlersForProvider(CloudProvider.GCP)).thenReturn(List.of(crawler1, crawler2));
		doThrow(new RuntimeException("Trigger failed!")).when(crawler1).discoverResourcesAsync(anyString(), anyMap());
		doThrow(new RuntimeException("Trigger failed too!")).when(crawler2).discoverResourcesAsync(anyString(),
				anyMap());

		Boolean result = callable.call();

		assertFalse(result);
		verify(crawler1).discoverResourcesAsync(eq("test-account"), anyMap());
		verify(crawler2).discoverResourcesAsync(eq("test-account"), anyMap());
	}
}