package org.simantics.fileimport;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Platform;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.simantics.fileimport.dropins.FileImportDropins;

public class Activator implements BundleActivator {

	private static BundleContext context;
	
	private static Path dropinsFolder = null;

	static BundleContext getContext() {
		return context;
	}

	/*
	 * (non-Javadoc)
	 * @see org.osgi.framework.BundleActivator#start(org.osgi.framework.BundleContext)
	 */
	public void start(BundleContext bundleContext) throws Exception {
		Activator.context = bundleContext;
		FileImportDropins.watchDropinsFolder();
	}

	/*
	 * (non-Javadoc)
	 * @see org.osgi.framework.BundleActivator#stop(org.osgi.framework.BundleContext)
	 */
	public void stop(BundleContext bundleContext) throws Exception {
		Activator.context = null;
		FileImportDropins.unwatchDropinsFolder();
	}
	
	public static Path getDropinsFolder() throws IOException {
	    if (dropinsFolder == null) {
	        IPath state = Platform.getStateLocation(context.getBundle());
	        dropinsFolder = Paths.get(state.append("dropins").toOSString());
	        if (!Files.exists(dropinsFolder))
	            Files.createDirectories(dropinsFolder);
	    }
	    return dropinsFolder;
	}

}