package org.gcube.dataharvest;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.SortedSet;

import org.gcube.dataharvest.dao.DatabaseManager;
import org.gcube.dataharvest.datamodel.Harvest;
import org.gcube.dataharvest.harvester.SocialHarvester;
import org.gcube.dataharvest.harvester.VreUsersHarvester;
import org.gcube.dataharvest.harvester.sobigdata.DataMethodDownloadHarvester;
import org.gcube.dataharvest.harvester.sobigdata.MethodInvocationHarvester;
import org.gcube.dataharvest.harvester.sobigdata.ResourceCatalogueHarvester;
import org.gcube.dataharvest.utils.ContextAuthorization;
import org.gcube.dataharvest.utils.DateUtils;
import org.gcube.dataharvest.utils.MeasureType;
import org.gcube.dataharvest.utils.Utils;
import org.gcube.vremanagement.executor.plugin.Plugin;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class AccountingDataHarvesterPlugin extends Plugin<DataHarvestPluginDeclaration> {
	
	private static Logger logger = LoggerFactory.getLogger(AccountingDataHarvesterPlugin.class);
	
	private static final String PROPERTY_FILENAME = "config.properties";
	
	public static final String START_DATE_INPUT_PARAMETER = "startDate";
	public static final String MEASURE_TYPE_INPUT_PARAMETER = "measureType";
	public static final String RERUN_INPUT_PARAMETER = "reRun";
	public static final String DRY_RUN_INPUT_PARAMETER = "dryRun";
	
	protected Date start;
	protected Date end;
	
	public AccountingDataHarvesterPlugin(DataHarvestPluginDeclaration pluginDeclaration) {
		super(pluginDeclaration);
	}
	
	private static final InheritableThreadLocal<Properties> properties = new InheritableThreadLocal<Properties>() {
		
		@Override
		protected Properties initialValue() {
			return new Properties();
		}
		
	};
	
	public static InheritableThreadLocal<Properties> getProperties() {
		return properties;
	}
	
	private void getConfigParameters() throws IOException {
		try {
			Properties properties = new Properties();
			InputStream input = AccountingDataHarvesterPlugin.class.getClassLoader()
					.getResourceAsStream(PROPERTY_FILENAME);
			properties.load(input);
			getProperties().set(properties);
		} catch(Exception e) {
			logger.warn(
					"Unable to load {} file containing configuration properties. AccountingDataHarvesterPlugin will use defaults",
					PROPERTY_FILENAME);
		}
		
	}
	
	private static final InheritableThreadLocal<ContextAuthorization> contextAuthorization = new InheritableThreadLocal<ContextAuthorization>() {
		
		@Override
		protected ContextAuthorization initialValue() {
			return null;
		}
		
	};
	
	/** {@inheritDoc} */
	@Override
	public void launch(Map<String,Object> inputs) throws Exception {
		logger.debug("{} is starting", this.getClass().getSimpleName());
		
		if(inputs == null || inputs.isEmpty()) {
			throw new IllegalArgumentException("The can only be launched providing valid input parameters");
		}
		
		if(!inputs.containsKey(MEASURE_TYPE_INPUT_PARAMETER)) {
			throw new IllegalArgumentException("Please set required parameter '" + MEASURE_TYPE_INPUT_PARAMETER + "'");
		}
		
		MeasureType measureType = MeasureType.valueOf((String) inputs.get(MEASURE_TYPE_INPUT_PARAMETER));
		
		boolean reRun = true;
		if(inputs.containsKey(RERUN_INPUT_PARAMETER)) {
			try {
				reRun = (boolean) inputs.get(RERUN_INPUT_PARAMETER);
			}catch (Exception e) {
				throw new IllegalArgumentException("'" + RERUN_INPUT_PARAMETER + "' must be a boolean");
			}
		}
		
		boolean dryRun = true;
		if(inputs.containsKey(DRY_RUN_INPUT_PARAMETER)) {
			try {
				dryRun = (boolean) inputs.get(DRY_RUN_INPUT_PARAMETER);
			}catch (Exception e) {
				throw new IllegalArgumentException("'" + DRY_RUN_INPUT_PARAMETER + "' must be a boolean");
			}
		}
		
		if(inputs.containsKey(START_DATE_INPUT_PARAMETER)) {
			String startDateString = (String) inputs.get(START_DATE_INPUT_PARAMETER);
			start = DateUtils.UTC_DATE_FORMAT.parse(startDateString + " " + DateUtils.UTC);
		} else {
			start = DateUtils.getPreviousPeriod(measureType).getTime();
		}
		
		end = DateUtils.getEndDateFromStartDate(measureType, start, 1);
		
		logger.debug("Harvesting from {} to {}", DateUtils.LAUNCH_DATE_FORMAT.format(start),
				DateUtils.LAUNCH_DATE_FORMAT.format(end));
		
		getConfigParameters();
		
		ContextAuthorization contextAuthorization = new ContextAuthorization();
		
		DatabaseManager dbaseManager = new DatabaseManager();
		
		SortedSet<String> contexts = contextAuthorization.getContexts();
		
		
		ArrayList<Harvest> data = new ArrayList<Harvest>();
		
		for(String context : contexts) {
			
			// Setting the token for the context
			Utils.setContext(contextAuthorization.getTokenForContext(context));
			
			try {
				// collecting info on VRE users
				VreUsersHarvester vreUsersHarvester = new VreUsersHarvester(start, end);
				List<Harvest> harvested = vreUsersHarvester.getData();
				data.addAll(harvested);
			} catch(Exception x) {
				logger.error(x.getLocalizedMessage());
			}
			
			
			try {
				// collecting info on Res. Catalogue (Dataset, Application, Deliverables, Methods)
				ResourceCatalogueHarvester resourceCatalogueHarvester = new ResourceCatalogueHarvester(start, end);
				List<Harvest> harvested = resourceCatalogueHarvester.getData();
				data.addAll(harvested);
			} catch(Exception x) {
				logger.error(x.getLocalizedMessage());
			}
			
			try {
				// collecting info on Data/Method download
				DataMethodDownloadHarvester dataMethodDownloadHarvester = new DataMethodDownloadHarvester(start, end);
				List<Harvest> harvested = dataMethodDownloadHarvester.getData();
				data.addAll(harvested);
			} catch(Exception x) {
				logger.error(x.getLocalizedMessage());
			}
			
			try {
				// collecting info on social (posts, replies and likes)
				SocialHarvester socialHarvester = new SocialHarvester(start, end);
				List<Harvest> harvested = socialHarvester.getData();
				data.addAll(harvested);
			} catch(Exception x) {
				logger.error(x.getLocalizedMessage());
			}
			
			try {
				// collecting info on method invocation
				MethodInvocationHarvester methodInvocationHarvester = new MethodInvocationHarvester(start, end);
				List<Harvest> harvested = methodInvocationHarvester.getData();
				data.addAll(harvested);
			} catch(Exception x) {
				logger.error(x.getLocalizedMessage());
			}
		}
		
		if(!dryRun) {
			dbaseManager.insertMonthlyData(start, end, data, reRun);
		}
		
	}
	
	/** {@inheritDoc} */
	@Override
	protected void onStop() throws Exception {
		logger.debug("{} is stopping", this.getClass().getSimpleName());
	}
	
}