package de.superx.kettle.statistics;

import java.io.File;
import java.util.HashMap;

import javax.sql.DataSource;

import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Ignore;
import org.pentaho.di.core.KettleEnvironment;
import org.pentaho.di.core.database.DataSourceProviderFactory;
import org.pentaho.di.core.database.DataSourceProviderInterface;
import org.pentaho.di.core.database.DatabaseMeta;
import org.pentaho.di.core.exception.KettleException;
import org.pentaho.di.core.logging.LogLevel;
import org.pentaho.di.metastore.DatabaseMetaStoreUtil;
import org.pentaho.metastore.api.exceptions.MetaStoreException;
import org.pentaho.metastore.stores.memory.MemoryMetaStore;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.support.rowset.SqlRowSet;

import de.superx.KettleTestRunner;
import de.superx.db.H2InMemoryCreator;
import de.superx.stat.StatisticsBase;
import de.superx.util.test.KettleH2TestDataSourceProvider;

/**
 * Base class to execute kettle jobs with different parameters
 * @author hiber
 *
 */
@Ignore
public class StudentAndExaminationOfficialStatisticBase {
	
	private static final Logger LOG = LoggerFactory.getLogger(StudentAndExaminationOfficialStatisticBase.class);
		
	protected static final String KETTLE_JOB_FILE = "superx/WEB-INF/conf/edustore/db/module/astat/etl/statistik2016/estatistik.kjb";
	
	private static final String BASE_DIR = "test/resources/schema_files/students_and_examination_statistics";
	protected static final String SCHEMA_PATH = BASE_DIR + "/schema";
	protected static final String VIEWS_PATH = BASE_DIR + "/views";
	protected static final String UNLOADS_PATH = BASE_DIR +"/unloads";
	private static final String KETTLE_PLUGIN_DIR = String.join(File.separator, "superx", "WEB-INF", "kettle-plugins");
	
	private static DataSource datasource = null;
	
	@BeforeClass
	public static void initEnvironment() throws Exception {
		createInMemoryTestDb();
//	        createFileTestDb();
		initKettleEnvironment();
	}

	protected static void runKettleJob(HashMap<String, String> parameter)
			throws Exception {
        KettleTestRunner.runKettleJob(KETTLE_JOB_FILE, parameter, LogLevel.BASIC);
		SqlRowSet resultSet = executeQuery("SELECT * FROM " + StatisticsBase.MODULE_PREFIX + "astat");
		int columnCount = resultSet.getMetaData().getColumnCount(); 
		LOG.info("content of " + StatisticsBase.MODULE_PREFIX + "_astat:");
		while(resultSet.next()) {
			StringBuilder sb = new StringBuilder();
			for(int i = 1; i < columnCount+1; i++) {
				sb.append(resultSet.getString(i)+" ");
			}
			LOG.info(sb.toString());
		}
		
	}

	private static void createInMemoryTestDb() throws Exception {
		H2InMemoryCreator h2InMemoryCreator = new H2InMemoryCreator();
		String schemaPath = new File(SCHEMA_PATH).getAbsolutePath();
		String unloadsPath = new File(UNLOADS_PATH).getAbsolutePath();
		String viewsPath = new File(VIEWS_PATH).getAbsolutePath();
		h2InMemoryCreator.setSchemaDir(schemaPath).setViewDir(viewsPath).setUnlDir(unloadsPath).setUserName("sa")
				.setTablePattern(
						"(astat_.*|sos_.*|trans_cifx|cif.*|dim_studiengang|hochschulinfo|semester|konstanten|accredited_ects|sx_repository)")
				.setViewPattern("skipeverything");
		h2InMemoryCreator.createH2InMemory();
	}
	
	private static void createFileTestDb() throws Exception {
		H2InMemoryCreator h2InMemoryCreator = new H2InMemoryCreator(H2InMemoryCreator.JDBC_H2_IN_FILE_URL);
		String schemaPath = new File(SCHEMA_PATH).getAbsolutePath();
		String unloadsPath = new File(UNLOADS_PATH).getAbsolutePath();
		String viewsPath = new File(VIEWS_PATH).getAbsolutePath();
		h2InMemoryCreator.setSchemaDir(schemaPath).setViewDir(viewsPath).setUnlDir(unloadsPath).setUserName("sa")
				.setTablePattern(
						"(astat_.*|sos_.*|trans_cifx|cif.*|dim_studiengang|hochschulinfo|semester|konstanten|accredited_ects|sx_repository)")
				.setViewPattern("skipeverything");
		h2InMemoryCreator.createH2InMemory();
	}

	private static void initKettleEnvironment() throws KettleException, MetaStoreException {
       	System.setProperty("BI_KETTLE_PLUGIN_BASE_FOLDERS", KETTLE_PLUGIN_DIR);
		KettleEnvironment.init();
		DataSourceProviderInterface providerinterface = new KettleH2TestDataSourceProvider("default", null);
		DataSourceProviderFactory.setDataSourceProviderInterface(providerinterface);
//		Server.startWebServer(connection);
       	MemoryMetaStore metastore = new MemoryMetaStore();
		DatabaseMeta dbmeta = new DatabaseMeta("eduetl", "POSTGRESQL", "JNDI", null, "eduetl", "1521", null, null);
		DatabaseMetaStoreUtil.createDatabaseElement(metastore, dbmeta);
		datasource = providerinterface.getNamedDataSource("eduetl");
	}

	protected static SqlRowSet executeQuery(String query) throws Exception  {
		JdbcTemplate jt = new JdbcTemplate(datasource);
		return jt.queryForRowSet(query);
	}
	
	@AfterClass
	public static void tearDown() throws Exception {
        KettleEnvironment.shutdown();
	}
}