/******************************************************************************
 *
 *  file:  CmdLineInterface.h
 *
 *  Copyright (c) 2003, Michael E. Smoot .
 *  Copyright (c) 2004, Michael E. Smoot, Daniel Aarno.
 *  All rights reverved.
 *
 *  See the file COPYING in the top directory of this distribution for
 *  more information.
 *
 *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS
 *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 *  DEALINGS IN THE SOFTWARE.
 *
 *****************************************************************************/

#ifndef TCLAP_COMMANDLINE_INTERFACE_H
#define TCLAP_COMMANDLINE_INTERFACE_H

#include <string>
#include <vector>
#include <list>
#include <iostream>
#include <algorithm>


namespace TCLAP
{

class Arg;
class CmdLineOutput;
class XorHandler;

/**
 * The base class that manages the command line definition and passes
 * along the parsing to the appropriate Arg classes.
 */
class CmdLineInterface
{
  public:

    /**
     * Destructor
     */
    virtual ~CmdLineInterface() {}

    /**
     * Adds an argument to the list of arguments to be parsed.
     * \param a - Argument to be added.
     */
    virtual void add( Arg& a )=0;

    /**
     * An alternative add.  Functionally identical.
     * \param a - Argument to be added.
     */
    virtual void add( Arg* a )=0;

    /**
     * Add two Args that will be xor'd.
     * If this method is used, add does
     * not need to be called.
     * \param a - Argument to be added and xor'd.
     * \param b - Argument to be added and xor'd.
     */
    virtual void xorAdd( Arg& a, Arg& b )=0;

    /**
     * Add a list of Args that will be xor'd.  If this method is used,
     * add does not need to be called.
     * \param xors - List of Args to be added and xor'd.
     */
    virtual void xorAdd( std::vector<Arg*>& xors )=0;

    /**
     * Parses the command line.
     * \param argc - Number of arguments.
     * \param argv - Array of arguments.
     */
    virtual bool parse(int argc, const char * const * argv)=0;

    /**
     * Parses the command line.
     * \param args - A vector of strings representing the args.
     * args[0] is still the program name.
     */
    bool parse(std::vector<std::string>& args);

    /**
     * Returns the CmdLineOutput object.
     */
    virtual CmdLineOutput* getOutput()=0;

    /**
     * \param co - CmdLineOutput object that we want to use instead.
     */
    virtual void setOutput(CmdLineOutput* co)=0;

    /**
     * Returns the version string.
     */
    virtual std::string& getVersion()=0;

    /**
     * Returns the program name string.
     */
    virtual std::string& getProgramName()=0;

    /**
     * Returns the argList.
     */
    virtual std::list<Arg*>& getArgList()=0;

    /**
     * Returns the XorHandler.
     */
    virtual XorHandler& getXorHandler()=0;

    /**
     * Returns the delimiter string.
     */
    virtual char getDelimiter()=0;

    /**
     * Returns the message string.
     */
    virtual std::string& getMessage()=0;

    /**
     * Indicates whether or not the help and version switches were created
     * automatically.
     */
    virtual bool hasHelpAndVersion()=0;

    /**
     * Resets the instance as if it had just been constructed so that the
     * instance can be reused.
     */
    virtual void reset()=0;
};

} //namespace


#endif