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package org.scijava.run.console;

import java.lang.reflect.InvocationTargetException;
import java.util.LinkedList;

import org.scijava.console.AbstractConsoleArgument;
import org.scijava.console.ConsoleArgument;
import org.scijava.log.LogService;
import org.scijava.parse.Items;
import org.scijava.parse.ParseService;
import org.scijava.plugin.Parameter;
import org.scijava.plugin.Plugin;
import org.scijava.run.RunService;
import org.scijava.startup.StartupService;

/**
 * Handles the {@code --run} command line argument.
 *
 * @author Curtis Rueden
 */
@Plugin(type = ConsoleArgument.class)
public class RunArgument extends AbstractConsoleArgument {

	@Parameter
	private RunService runService;

	@Parameter
	private StartupService startupService;

	@Parameter
	private ParseService parser;

	@Parameter
	private LogService log;

	// -- Constructor --

	public RunArgument() {
		super(2, "--run");
	}

	// -- ConsoleArgument methods --

	@Override
	public void handle(final LinkedList args) {
		if (!supports(args)) return;

		args.removeFirst(); // --run
		final String code = args.removeFirst();
		final String arg = getParam(args);
		if (arg != null) args.removeFirst(); // argument list was given

		startupService.addOperation(() -> {
			try {
				if (arg == null) runService.run(code);
				else {
					final Items items = parser.parse(arg);
					if (items.isMap()) runService.run(code, items.asMap());
					else if (items.isList()) runService.run(code, items.toArray());
					else {
						throw new IllegalArgumentException("Arguments are inconsistent. " +
							"Please pass either a list of key/value pairs, " +
							"or a list of values.");
					}
				}
			}
			catch (final InvocationTargetException exc) {
				throw new RuntimeException(exc);
			}
		});
	}

	// -- Typed methods --

	@Override
	public boolean supports(final LinkedList args) {
		if (!super.supports(args)) return false;
		return runService.supports(args.get(1));
	}

}