/*=========================================================================

  Program:   CMake - Cross-Platform Makefile Generator
  Module:    $RCSfile$
  Language:  C++
  Date:      $Date$
  Version:   $Revision$

  Copyright (c) 2002 Kitware, Inc., Insight Consortium.  All rights reserved.
  See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.

     This software is distributed WITHOUT ANY WARRANTY; without even 
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/
#include "cmFindPathCommand.h"
#include "cmCacheManager.h"

// cmFindPathCommand
bool cmFindPathCommand::InitialPass(std::vector<std::string> const& argsIn)
{
  if(argsIn.size() < 2)
    {
    this->SetError("called with incorrect number of arguments");
    return false;
    }

  // Now check and see if the value has been stored in the cache
  // already, if so use that value and don't look for the program
  std::string helpString = "What is the path where the file ";
  helpString += argsIn[1] + " can be found";
  std::vector<std::string> args;
  size_t size = argsIn.size();
  for(unsigned int j = 0; j < size; ++j)
    {
    if(argsIn[j] != "DOC")
      {
      args.push_back(argsIn[j]);
      }
    else
      {
      if(j+1 < size)
        {
        helpString = argsIn[j+1];
        }
      break;
      }
    }

  const char* cacheValue
    = m_Makefile->GetDefinition(args[0].c_str());
  if(cacheValue && !cmSystemTools::IsNOTFOUND(cacheValue))
    { 
    return true;
    }
  if(cacheValue)
    {
    cmCacheManager::CacheIterator it = 
      m_Makefile->GetCacheManager()->GetCacheIterator(args[0].c_str());
    if(!it.IsAtEnd())
      {
      const char* hs = it.GetProperty("HELPSTRING");
      helpString = hs?hs:"(none)";
      }
    }
  std::vector<std::string> path;
  // add any user specified paths
  for (unsigned int j = 2; j < args.size(); j++)
    {
    // expand variables
    std::string exp = args[j];
    cmSystemTools::ExpandRegistryValues(exp);      

    // Glob the entry in case of wildcards.
    cmSystemTools::GlobDirs(exp.c_str(), path);
    }
  cmSystemTools::GetPath(path, "CMAKE_INCLUDE_PATH");
  // add the standard path
  cmSystemTools::GetPath(path);
  unsigned int k;
  for(k=0; k < path.size(); k++)
    {
    std::string tryPath = path[k];
    tryPath += "/";
    tryPath += args[1];
    if(cmSystemTools::FileExists(tryPath.c_str()))
      {
      path[k] = cmSystemTools::CollapseFullPath(path[k].c_str()); 
      if(path[k].size() && path[k][path[k].size()-1] == '/')
        {
        path[k] = path[k].substr(0, path[k].size()-1);
        }
      m_Makefile->AddCacheDefinition(args[0].c_str(),
                                     path[k].c_str(),
                                     helpString.c_str(),
                                     cmCacheManager::PATH);
      return true;
      }
    }
  
  m_Makefile->AddCacheDefinition(args[0].c_str(),
                                 (args[0] + "-NOTFOUND").c_str(),
                                 helpString.c_str(),
                                 cmCacheManager::PATH);
  return true;
}