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/*
 * Copyright 2011-2012 the original author or authors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.shell.commands;

import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.logging.Logger;

import org.apache.commons.io.IOUtils;
import org.springframework.shell.support.logging.HandlerUtils;
import org.springframework.stereotype.Component;

/**
 * Implementation of {@link OsOperations} interface.
 * 
 * @author Stefan Schmidt
 * @since 1.2.0
 */
@Component
public class OsOperationsImpl implements OsOperations {
	private static final Logger LOGGER = HandlerUtils.getLogger(OsOperationsImpl.class);

	public void executeCommand(final String command) throws IOException {
		final File root = new File(".");
		final Process p = Runtime.getRuntime().exec(command, null, root);
		Reader input = new InputStreamReader(p.getInputStream());
		Reader errors = new InputStreamReader(p.getErrorStream());

		for (String line : IOUtils.readLines(input)) {
			if (line.startsWith("[ERROR]")) {
				LOGGER.severe(line);
			}
			else if (line.startsWith("[WARNING]")) {
				LOGGER.warning(line);
			}
			else {
				LOGGER.info(line);
			}
		}

		
		for (String line : IOUtils.readLines(errors)) {
			if (line.startsWith("[ERROR]")) {
				LOGGER.severe(line);
			}
			else if (line.startsWith("[WARNING]")) {
				LOGGER.warning(line);
			}
			else {
				LOGGER.info(line);
			}
		}

		
		p.getOutputStream().close();


		try {
			if (p.waitFor() != 0) {
				LOGGER.warning("The command '" + command + "' did not complete successfully");
			}
		} catch (final InterruptedException e) {
			throw new IllegalStateException(e);
		}
	}

}