/*
 * Copyright 2014 Effektif GmbH.
 *
 * 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 com.effektif.example.cli.command;

import java.io.PrintWriter;

import com.effektif.workflow.api.Configuration;



/**
 * A command line consisting of a command with a single argument.
 */
public class CommandLine {

  private final Command command;
  private final String argument;

  public CommandLine(Command command, String argument) {
    this.command = command;
    this.argument = argument;
  }

  /**
   * Executes this command line, using the given workflow engine configuration and output.
   */
  public void execute(Configuration configuration, PrintWriter out) {
    command.execute(this, configuration, out);
  }

  public String getArgument() {
    return argument;
  }

  public Command getCommand() {
    return command;
  }

  public boolean isQuit() {
    return Command.QUIT.equals(command);
  }

  /**
   * Parses a command line string into one or two parts.
   */
  public static CommandLine parse(String commandLine) {
    final String[] parts = commandLine.trim().split("\\s+", 2);
    final Command parsedCommand = Command.valueOf(parts[0].toUpperCase());
    if (parts.length > 1) {
      return new CommandLine(parsedCommand, parts[1]);
    }
    else {
      return new CommandLine(parsedCommand, "");
    }
  }
}