package azkaban.test.project;

import java.io.File;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.List;

import javax.sql.DataSource;

import org.apache.commons.dbutils.DbUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.ResultSetHandler;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;

import azkaban.flow.Edge;
import azkaban.flow.Flow;
import azkaban.flow.Node;
import azkaban.project.JdbcProjectLoader;
import azkaban.project.Project;
import azkaban.project.ProjectFileHandler;
import azkaban.project.ProjectLoader;
import azkaban.project.ProjectLogEvent;
import azkaban.project.ProjectLogEvent.EventType;
import azkaban.project.ProjectManagerException;
import azkaban.user.Permission;
import azkaban.user.User;
import azkaban.database.DataSourceUtils;
import azkaban.utils.Pair;
import azkaban.utils.Props;
import azkaban.utils.PropsUtils;

public class JdbcProjectLoaderTest {
	private static boolean testDBExists;
	//@TODO remove this and turn into local host.
	private static final String host = "localhost";
	private static final int port = 3306;
	private static final String database = "test";
	private static final String user = "azkaban";
	private static final String password = "azkaban";
	private static final int numConnections = 10;

	@BeforeClass
	public static void setupDB() {
		DataSource dataSource = DataSourceUtils.getMySQLDataSource(host, port, database, user, password, numConnections);
		testDBExists = true;

		Connection connection = null;
		try {
			connection = dataSource.getConnection();
		} catch (SQLException e) {
			e.printStackTrace();
			testDBExists = false;
			DbUtils.closeQuietly(connection);
			return;
		}

		CountHandler countHandler = new CountHandler();
		QueryRunner runner = new QueryRunner();
		try {
			runner.query(connection, "SELECT COUNT(1) FROM projects", countHandler);
		} catch (SQLException e) {
			e.printStackTrace();
			testDBExists = false;
			DbUtils.closeQuietly(connection);
			return;
		}

		try {
			runner.query(connection, "SELECT COUNT(1) FROM project_events", countHandler);
		} catch (SQLException e) {
			e.printStackTrace();
			testDBExists = false;
			DbUtils.closeQuietly(connection);
			return;
		}

		try {
			runner.query(connection, "SELECT COUNT(1) FROM project_permissions", countHandler);
		} catch (SQLException e) {
			e.printStackTrace();
			testDBExists = false;
			DbUtils.closeQuietly(connection);
			return;
		}

		try {
			runner.query(connection, "SELECT COUNT(1) FROM project_files", countHandler);
		} catch (SQLException e) {
			e.printStackTrace();
			testDBExists = false;
			DbUtils.closeQuietly(connection);
			return;
		}

		try {
			runner.query(connection, "SELECT COUNT(1) FROM project_flows", countHandler);
		} catch (SQLException e) {
			e.printStackTrace();
			testDBExists = false;
			DbUtils.closeQuietly(connection);
			return;
		}

		try {
			runner.query(connection, "SELECT COUNT(1) FROM project_properties", countHandler);
		} catch (SQLException e) {
			e.printStackTrace();
			testDBExists = false;
			DbUtils.closeQuietly(connection);
			return;
		}

		DbUtils.closeQuietly(connection);

		clearDB();
	}

	private static void clearDB() {
		if (!testDBExists) {
			return;
		}

		DataSource dataSource = DataSourceUtils.getMySQLDataSource(host, port, database, user, password, numConnections);
		Connection connection = null;
		try {
			connection = dataSource.getConnection();
		} catch (SQLException e) {
			e.printStackTrace();
			testDBExists = false;
			DbUtils.closeQuietly(connection);
			return;
		}

		QueryRunner runner = new QueryRunner();
		try {
			runner.update(connection, "DELETE FROM projects");

		} catch (SQLException e) {
			e.printStackTrace();
			testDBExists = false;
			DbUtils.closeQuietly(connection);
			return;
		}

		try {
			runner.update(connection, "DELETE FROM project_events");
		} catch (SQLException e) {
			e.printStackTrace();
			testDBExists = false;
			DbUtils.closeQuietly(connection);
			return;
		}

		try {
			runner.update(connection, "DELETE FROM project_permissions");
		} catch (SQLException e) {
			e.printStackTrace();
			testDBExists = false;
			DbUtils.closeQuietly(connection);
			return;
		}

		try {
			runner.update(connection, "DELETE FROM project_files");
		} catch (SQLException e) {
			e.printStackTrace();
			testDBExists = false;
			DbUtils.closeQuietly(connection);
			return;
		}

		try {
			runner.update(connection, "DELETE FROM project_flows");
		} catch (SQLException e) {
			e.printStackTrace();
			testDBExists = false;
			DbUtils.closeQuietly(connection);
			return;
		}

		try {
			runner.update(connection, "DELETE FROM project_properties");
		} catch (SQLException e) {
			e.printStackTrace();
			testDBExists = false;
			DbUtils.closeQuietly(connection);
			return;
		}


		DbUtils.closeQuietly(connection);
	}

	@Test
	public void testCreateProject() throws ProjectManagerException {
		if (!isTestSetup()) {
			return;
		}

		ProjectLoader loader = createLoader();
		String projectName = "mytestProject";
		String projectDescription = "This is my new project";
		User user = new User("testUser");

		Project project = loader.createNewProject(projectName, projectDescription, user);
		Assert.assertTrue("Project Id set", project.getId() > -1);
		Assert.assertEquals("Project name", projectName, project.getName());
		Assert.assertEquals("Project description", projectDescription, project.getDescription());

		System.out.println("Test true");
		Project project2 = loader.fetchProjectById(project.getId());
		assertProjectMemberEquals(project, project2);
	}

	@Test
	public void testRemoveProject() throws ProjectManagerException {
		if (!isTestSetup()) {
			return;
		}

		ProjectLoader loader = createLoader();
		String projectName = "testRemoveProject";
		String projectDescription = "This is my new project";
		User user = new User("testUser");

		Project project = loader.createNewProject(projectName, projectDescription, user);
		Assert.assertTrue("Project Id set", project.getId() > -1);
		Assert.assertEquals("Project name", projectName, project.getName());
		Assert.assertEquals("Project description", projectDescription, project.getDescription());

		Project project2 = loader.fetchProjectById(project.getId());
		assertProjectMemberEquals(project, project2);
		loader.removeProject(project, user.getUserId());

		Project project3 = loader.fetchProjectById(project.getId());
		Assert.assertFalse(project3.isActive());

		List<Project> projList = loader.fetchAllActiveProjects();
		for (Project proj: projList) {
			Assert.assertTrue(proj.getId() != project.getId());
		}
	}

	@Test
	public void testAddRemovePermissions() throws ProjectManagerException {
		if (!isTestSetup()) {
			return;
		}

		ProjectLoader loader = createLoader();
		String projectName = "mytestProject1";
		String projectDescription = "This is my new project";
		User user = new User("testUser");

		Project project = loader.createNewProject(projectName, projectDescription, user);
		Assert.assertTrue("Project Id set", project.getId() > -1);
		Assert.assertEquals("Project name", projectName, project.getName());
		Assert.assertEquals("Project description", projectDescription, project.getDescription());

		Permission perm = new Permission(0x2);
		loader.updatePermission(project, user.getUserId(), new Permission(0x2), false);
		loader.updatePermission(project, "group1", new Permission(0x2), true);
		Assert.assertEquals(perm, project.getUserPermission(user.getUserId()));

		Permission permOverride = new Permission(0x6);
		loader.updatePermission(project, user.getUserId(), permOverride, false);
		Assert.assertEquals(permOverride, project.getUserPermission(user.getUserId()));

		Project project2 = loader.fetchProjectById(project.getId());
		assertProjectMemberEquals(project, project2);
		Assert.assertEquals(permOverride, project2.getUserPermission(user.getUserId()));
	}

	@Test
	public void testProjectEventLogs() throws ProjectManagerException {
		if (!isTestSetup()) {
			return;
		}

		ProjectLoader loader = createLoader();
		String projectName = "testProjectEventLogs";
		String projectDescription = "This is my new project";
		User user = new User("testUser");

		String message = "My message";
		EventType type = EventType.USER_PERMISSION;
		Project project = loader.createNewProject(projectName, projectDescription, user);
		loader.postEvent(project, type, user.getUserId(), message);

		List<ProjectLogEvent> events = loader.getProjectEvents(project, 10, 0);
		Assert.assertTrue(events.size() == 1);

		ProjectLogEvent event = events.get(0);
		Assert.assertEquals(event.getProjectId(), project.getId());
		Assert.assertEquals(event.getUser(), user.getUserId());
		Assert.assertEquals(event.getMessage(), message);
		Assert.assertEquals(event.getType(), type);
	}

	@Test
	public void testFlowUpload() throws ProjectManagerException {
		ProjectLoader loader = createLoader();
		((JdbcProjectLoader)loader).setDefaultEncodingType(JdbcProjectLoader.EncodingType.GZIP);
		String projectName = "mytestFlowUpload1";
		String projectDescription = "This is my new project";
		User user = new User("testUser");

		Project project = loader.createNewProject(projectName, projectDescription, user);

		Flow flow = new Flow("MyNewFlow");

		flow.addNode(new Node("A"));
		flow.addNode(new Node("B"));
		flow.addNode(new Node("C"));
		flow.addNode(new Node("D"));

		flow.addEdge(new Edge("A", "B"));
		flow.addEdge(new Edge("A", "C"));
		flow.addEdge(new Edge("B", "D"));
		flow.addEdge(new Edge("C", "D"));

		flow.initialize();

		loader.uploadFlow(project, 4, flow);
		project.setVersion(4);
		Flow newFlow = loader.fetchFlow(project, flow.getId());
		Assert.assertTrue(newFlow != null);
		Assert.assertEquals(flow.getId(), newFlow.getId());
		Assert.assertEquals(flow.getEdges().size(), newFlow.getEdges().size());
		Assert.assertEquals(flow.getNodes().size(), newFlow.getNodes().size());
	}

	@Test
	public void testFlowUploadPlain() throws ProjectManagerException {
		ProjectLoader loader = createLoader();
		((JdbcProjectLoader)loader).setDefaultEncodingType(JdbcProjectLoader.EncodingType.PLAIN);
		String projectName = "mytestFlowUpload2";
		String projectDescription = "This is my new project";
		User user = new User("testUser");

		Project project = loader.createNewProject(projectName, projectDescription, user);

		Flow flow = new Flow("MyNewFlow2");

		flow.addNode(new Node("A1"));
		flow.addNode(new Node("B1"));
		flow.addNode(new Node("C1"));
		flow.addNode(new Node("D1"));

		flow.addEdge(new Edge("A1", "B1"));
		flow.addEdge(new Edge("A1", "C1"));
		flow.addEdge(new Edge("B1", "D1"));
		flow.addEdge(new Edge("C1", "D1"));

		flow.initialize();

		loader.uploadFlow(project, 4, flow);
		project.setVersion(4);
		Flow newFlow = loader.fetchFlow(project, flow.getId());
		Assert.assertTrue(newFlow != null);
		Assert.assertEquals(flow.getId(), newFlow.getId());
		Assert.assertEquals(flow.getEdges().size(), newFlow.getEdges().size());
		Assert.assertEquals(flow.getNodes().size(), newFlow.getNodes().size());

		List<Flow> flows = loader.fetchAllProjectFlows(project);
		Assert.assertTrue(flows.size() == 1);
	}

	@Test
	public void testProjectProperties() throws ProjectManagerException {
		ProjectLoader loader = createLoader();
		((JdbcProjectLoader)loader).setDefaultEncodingType(JdbcProjectLoader.EncodingType.PLAIN);
		String projectName = "testProjectProperties";
		String projectDescription = "This is my new project";
		User user = new User("testUser");

		Project project = loader.createNewProject(projectName, projectDescription, user);
		project.setVersion(5);
		Props props = new Props();
		props.put("a", "abc");
		props.put("b", "bcd");
		props.put("c", "cde");
		props.setSource("mysource");
		loader.uploadProjectProperty(project, props);

		Props retProps = loader.fetchProjectProperty(project, "mysource");

		Assert.assertEquals(retProps.getSource(), props.getSource());
		Assert.assertEquals(retProps.getKeySet(), props.getKeySet());
		Assert.assertEquals(PropsUtils.toStringMap(retProps, true), PropsUtils.toStringMap(props, true));
	}

	@Test
	public void testProjectFilesUpload() throws ProjectManagerException {
		if (!isTestSetup()) {
			return;
		}

		ProjectLoader loader = createLoader();
		String projectName = "testProjectFilesUpload1";
		String projectDescription = "This is my new project";
		User user = new User("testUser");

		Project project = loader.createNewProject(projectName, projectDescription, user);
		Assert.assertTrue("Project Id set", project.getId() > -1);
		Assert.assertEquals("Project name", projectName, project.getName());
		Assert.assertEquals("Project description", projectDescription, project.getDescription());

		File testDir = new File("unit/project/testjob/testjob.zip");

		loader.uploadProjectFile(project, 1, "zip", "testjob.zip", testDir, user.getUserId());

		ProjectFileHandler handler = loader.getUploadedFile(project, 1);
		Assert.assertEquals(handler.getProjectId(), project.getId());
		Assert.assertEquals(handler.getFileName(), "testjob.zip");
		Assert.assertEquals(handler.getVersion(), 1);
		Assert.assertEquals(handler.getFileType(), "zip");
		File file = handler.getLocalFile();
		Assert.assertTrue(handler.getLocalFile().exists());
		Assert.assertEquals(handler.getFileName(), "testjob.zip");
		Assert.assertEquals(handler.getUploader(), user.getUserId());

		handler.deleteLocalFile();
		Assert.assertTrue(handler.getLocalFile() == null);
		Assert.assertFalse(file.exists());
	}

	// Custom equals for what I think is important
	private void assertProjectMemberEquals(Project p1, Project p2) {
		Assert.assertEquals(p1.getId(), p2.getId());
		Assert.assertEquals(p1.getName(), p2.getName());
		Assert.assertEquals(p1.getCreateTimestamp(), p2.getCreateTimestamp());
		Assert.assertEquals(p1.getDescription(), p2.getDescription());
		Assert.assertEquals(p1.getLastModifiedUser(), p2.getLastModifiedUser());
		Assert.assertEquals(p1.getVersion(), p2.getVersion());
		Assert.assertEquals(p1.isActive(), p2.isActive());
		Assert.assertEquals(p1.getLastModifiedUser(), p2.getLastModifiedUser());

		assertUserPermissionsEqual(p1, p2);
		assertGroupPermissionsEqual(p1, p2);
	}

	private void assertUserPermissionsEqual(Project p1, Project p2) {
		List<Pair<String, Permission>> perm1 = p1.getUserPermissions();
		List<Pair<String, Permission>> perm2 = p2.getUserPermissions();

		Assert.assertEquals(perm1.size(), perm2.size());

		{
			HashMap<String, Permission> perm1Map = new HashMap<String, Permission>();
			for (Pair<String, Permission> p: perm1) {
				perm1Map.put(p.getFirst(), p.getSecond());
			}
			for (Pair<String, Permission> p: perm2) {
				Assert.assertTrue(perm1Map.containsKey(p.getFirst()));
				Permission perm = perm1Map.get(p.getFirst());
				Assert.assertEquals(perm, p.getSecond());
			}
		}

		{
			HashMap<String, Permission> perm2Map = new HashMap<String, Permission>();
			for (Pair<String, Permission> p: perm2) {
				perm2Map.put(p.getFirst(), p.getSecond());
			}
			for (Pair<String, Permission> p: perm1) {
				Assert.assertTrue(perm2Map.containsKey(p.getFirst()));
				Permission perm = perm2Map.get(p.getFirst());
				Assert.assertEquals(perm, p.getSecond());
			}
		}
	}

	private void assertGroupPermissionsEqual(Project p1, Project p2) {
		List<Pair<String, Permission>> perm1 = p1.getGroupPermissions();
		List<Pair<String, Permission>> perm2 = p2.getGroupPermissions();

		Assert.assertEquals(perm1.size(), perm2.size());

		{
			HashMap<String, Permission> perm1Map = new HashMap<String, Permission>();
			for (Pair<String, Permission> p: perm1) {
				perm1Map.put(p.getFirst(), p.getSecond());
			}
			for (Pair<String, Permission> p: perm2) {
				Assert.assertTrue(perm1Map.containsKey(p.getFirst()));
				Permission perm = perm1Map.get(p.getFirst());
				Assert.assertEquals(perm, p.getSecond());
			}
		}

		{
			HashMap<String, Permission> perm2Map = new HashMap<String, Permission>();
			for (Pair<String, Permission> p: perm2) {
				perm2Map.put(p.getFirst(), p.getSecond());
			}
			for (Pair<String, Permission> p: perm1) {
				Assert.assertTrue(perm2Map.containsKey(p.getFirst()));
				Permission perm = perm2Map.get(p.getFirst());
				Assert.assertEquals(perm, p.getSecond());
			}
		}
	}

	private ProjectLoader createLoader() {
		Props props = new Props();
		props.put("database.type", "mysql");

		props.put("mysql.host", host);
		props.put("mysql.port", port);
		props.put("mysql.user", user);
		props.put("mysql.database", database);
		props.put("mysql.password", password);
		props.put("mysql.numconnections", numConnections);

		return new JdbcProjectLoader(props);
	}

	private boolean isTestSetup() {
		if (!testDBExists) {
			System.err.println("Skipping DB test because Db not setup.");
			return false;
		}

		System.out.println("Running DB test because Db setup.");
		return true;
	}

	public static class CountHandler implements ResultSetHandler<Integer> {
		@Override
		public Integer handle(ResultSet rs) throws SQLException {
			int val = 0;
			while (rs.next()) {
				val++;
			}

			return val;
		}
	}
}
