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package protoj.lang.command;

import java.io.File;

import joptsimple.OptionSet;
import joptsimple.OptionSpec;
import protoj.lang.Command;
import protoj.lang.CommandStore;
import protoj.lang.ScpconfFeature;
import protoj.lang.StandardProject;

/**
 * Command line access to the {@link ScpconfFeature} pojo. See the scpconf.txt
 * file for help.
 * 
 * @author Ashley Williams
 * 
 */
public final class ScpconfCommand {

	public final class Body implements Runnable {
		public void run() {
			Command delegate = getDelegate();
			OptionSet options = delegate.getOptions();

			if (!options.has(nameOption)) {
				String hint = "the name option is mandatory";
				delegate.throwBadOptionsException(hint);
			}

			String name = options.valueOf(nameOption);
			File keyfile = options.valueOf(keyfileOption);
			String passtext = options.valueOf(passtextOption);
			boolean interpolate = options.has(interpolateOption);
			ScpconfFeature feature = project.getScpconfFeature();

			if (options.has(cleanOption)) {
				feature.clean(name, keyfile, passtext);
			} else {
				feature.configure(name, interpolate, keyfile, passtext);
			}
		}
	}

	/**
	 * Provides the basic command functionality.
	 */
	private Command delegate;
	private OptionSpec interpolateOption;
	private OptionSpec cleanOption;
	private OptionSpec passtextOption;
	private OptionSpec keyfileOption;
	private final StandardProject project;
	private OptionSpec nameOption;

	public ScpconfCommand(StandardProject project) {
		this.project = project;
		CommandStore store = project.getCommandStore();
		delegate = store.addCommand("scpconf", "32m", new Body());
		delegate.initHelpResource("/protoj/language/english/scpconf.txt");
		delegate.initBootstrapCurrentVm();
		nameOption = delegate.getParser().accepts(getNameOption())
				.withRequiredArg();
		interpolateOption = delegate.getParser()
				.accepts(getInterpolateOption());
		cleanOption = delegate.getParser().accepts(getCleanOption());
		passtextOption = delegate.getParser().accepts(getPasstextOption())
				.withRequiredArg();
		keyfileOption = delegate.getParser().accepts(getKeyfileOption())
				.withRequiredArg().ofType(File.class);
	}

	public String getNameOption() {
		return "name";
	}

	public String getInterpolateOption() {
		return "interpolate";
	}

	public String getCleanOption() {
		return "clean";
	}

	public String getPasstextOption() {
		return "passtext";
	}

	public String getKeyfileOption() {
		return "keyfile";
	}

	public Command getDelegate() {
		return delegate;
	}
}