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package org.etlunit.cli;

import org.clamshellcli.api.Command;
import org.clamshellcli.api.Context;
import org.clamshellcli.api.IOConsole;
import org.codehaus.plexus.util.StringUtils;
import org.etlunit.util.IOUtils;

import java.io.IOException;
import java.io.StringReader;
import java.net.URL;
import java.util.*;

public class VersionsCmd implements Command {
	private static final String NAMESPACE = "syscmd";
	public static final String ACTION_NAME = "versions";

	public Object execute(Context ctx) {
		IOConsole console = ctx.getIoConsole();

		try
		{
			Enumeration props = getClass().getClassLoader().getResources("META-INF/version/etlunit.module.properties");

			while (props.hasMoreElements())
			{
				URL ele = props.nextElement();

				String modProps = IOUtils.readURLToString(ele);

				Properties propsF = new Properties();
				propsF.load(new StringReader(modProps));

				// print the group and artifact id specially
				console.writeOutput(propsF.getProperty("projectGroupId") + "." + propsF.getProperty("projectArtifactId") + "\n");

				Enumeration names = (Enumeration) propsF.propertyNames();

				while (names.hasMoreElements())
				{
					String name = names.nextElement();

					if (name.equals("projectArtifactId") || name.equals("projectGroupId"))
					{
						continue;
					}

					console.writeOutput("\t" + StringUtils.rightPad(name + ":", 20) + propsF.getProperty(name) + "\n");
				}

				console.writeOutput("\n");
			}
		}
		catch (IOException e)
		{
			throw new IllegalArgumentException(e);
		}

		return null;
	}

	public void plug(Context plug) {
		// no load-time setup needed
	}

	public Descriptor getDescriptor(){
		return new Descriptor() {
			public String getNamespace() {return NAMESPACE;}

			public String getName() {
				return ACTION_NAME;
			}

			public String getDescription() {
				return "Prints the version info of all installed etlunit modules";
			}

			public String getUsage() {
				return "versions";
			}

			public Map getArguments() {
				return Collections.emptyMap();
			}
		};
	}
}