package mil.nga.giat.geowave.datastore.hbase.cli;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import com.beust.jcommander.Parameter;
import com.beust.jcommander.ParameterException;
import com.beust.jcommander.Parameters;

import mil.nga.giat.geowave.core.cli.annotations.GeowaveOperation;
import mil.nga.giat.geowave.core.cli.api.Command;
import mil.nga.giat.geowave.core.cli.api.DefaultOperation;
import mil.nga.giat.geowave.core.cli.api.OperationParams;
import mil.nga.giat.geowave.core.index.ByteArrayId;
import mil.nga.giat.geowave.core.store.CloseableIterator;
import mil.nga.giat.geowave.core.store.adapter.statistics.DataStatistics;
import mil.nga.giat.geowave.core.store.adapter.statistics.DataStatisticsStore;
import mil.nga.giat.geowave.core.store.operations.remote.options.DataStorePluginOptions;
import mil.nga.giat.geowave.core.store.operations.remote.options.StoreLoader;

@GeowaveOperation(name = "combinestats", parentOperation = HBaseSection.class)
@Parameters(commandDescription = "Combine all statistics in HBase namespace")
public class CombineStatisticsCommand extends
		DefaultOperation implements
		Command
{

	@Parameter(description = "<storename> <adapter id>")
	private List<String> parameters = new ArrayList<String>();

	private DataStorePluginOptions inputStoreOptions = null;

	/**
	 * Prep the driver & run the operation.
	 */
	@Override
	public void execute(
			OperationParams params ) {

		// Ensure we have all the required arguments
		if (parameters.size() != 2) {
			throw new ParameterException(
					"Requires arguments: <storename> <adapter id>");
		}

		String inputStoreName = parameters.get(0);
		String adapterId = parameters.get(1);

		// Attempt to load input store.
		if (inputStoreOptions == null) {
			StoreLoader inputStoreLoader = new StoreLoader(
					inputStoreName);
			if (!inputStoreLoader.loadFromConfig(getGeoWaveConfigFile(params))) {
				throw new ParameterException(
						"Cannot find store name: " + inputStoreLoader.getStoreName());
			}
			inputStoreOptions = inputStoreLoader.getDataStorePlugin();
		}

		// Get all statistics, remove all statistics, then re-add
		DataStatisticsStore store = inputStoreOptions.createDataStatisticsStore();
		CloseableIterator<DataStatistics<?>> stats = store.getDataStatistics(new ByteArrayId(
				adapterId));

		// Clear all existing stats
		store.removeAllStatistics(new ByteArrayId(
				adapterId));

		// Re-insert
		while (stats.hasNext()) {
			store.incorporateStatistics(stats.next());
		}
	}

	public List<String> getParameters() {
		return parameters;
	}

	public void setParameters(
			String storeName,
			String adapterId ) {
		parameters = Arrays.asList(
				storeName,
				adapterId);
	}

	public DataStorePluginOptions getInputStoreOptions() {
		return inputStoreOptions;
	}

	public void setInputStoreOptions(
			DataStorePluginOptions inputStoreOptions ) {
		this.inputStoreOptions = inputStoreOptions;
	}
}