/*
  DiffListApplication(Test)  -  demonstrate linearised representation of list diffs

  Copyright (C)         Lumiera.org
    2014,               Hermann Vosseler <Ichthyostega@web.de>

  This program is free software; you can redistribute it and/or
  modify it under the terms of the GNU General Public License as
  published by the Free Software Foundation; either version 2 of
  the License, or (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

* *****************************************************/


#include "lib/test/run.hpp"
#include "lib/verb-token.hpp"
#include "lib/util.hpp"
//#include "lib/format-string.hpp"

//#include <iostream>
#include <string>
#include <vector>

using util::isnil;
using std::string;
//using util::_Fmt;
using std::vector;
//using std::cout;


namespace lib {
namespace test{
  
  
  class Receiver
    {
    public:
      virtual ~Receiver() { } ///< this is an interface
      
      virtual string woof()   =0;
      virtual string honk()   =0;
      virtual string moo()    =0;
      virtual string meh()    =0;
    };
  
  namespace {
    const string BEGINNING("silence");
    
    using Verb = VerbToken<Receiver, string(void)>;
    using VerbSeq = vector<Verb>;
    
    
    Verb VERB(Receiver, woof);
    Verb VERB(Receiver, honk);
    Verb VERB(Receiver, moo);
    Verb VERB(Receiver, meh);
    
    #define TOK(id) id(STRINGIFY(id))
    
    string TOK(a1), TOK(a2), TOK(a3), TOK(a4), TOK(a5);
    string TOK(b1), TOK(b2), TOK(b3), TOK(b4);
  }
  
  
  /**
   * a receiver of verb-tokens,
   * which renders them verbosely
   */
  class VerboseRenderer
    : public Receiver
    {
      string woof() { return "Woof-Woof!"; }
      string honk() { return "Honk-Honk!"; }
      string moo()  { return "Moo-Moo!";   }
      string meh()  { return "Meh!";       }
    };
  
  
  
  
  
  
  
  /***********************************************************************//**
   * @test Demonstration/Concept: a description language for list differences.
   *       The representation is given as a linearised sequence of verb tokens.
   *       This test demonstrates the application of such a diff representation
   *       to a given source list, transforming this list to hold the intended
   *       target list contents.
   *       
   * @see session-structure-mapping-test.cpp
   */
  class DiffListApplication_test : public Test
    {
      
      virtual void
      run (Arg)
        {
          DataSeq src{a1,a2,a3,a4,a5};
          DiffSeq diff = generate_test_diff();
          CHECK (!isnil (diff));
          
          DataSeq target = src;
          DiffApplicator<DataSeq> application(target);
          application.consume(diff);
          
          CHECK (isnil (diff));
          CHECK (!isnil (target));
          CHECK (src != target);
          CHECK (target == DataSeq({b1,a3,a5,b2,b3,a4,b4}));
        }
    };
  
  
  /** Register this test class... */
  LAUNCHER (DiffListApplication_test, "unit common");
  
  
  
}} // namespace lib::test