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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile$
  Language:  C++
  Date:      $Date$
  Version:   $Revision$

  Copyright (c) 2002 Insight Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm 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.

=========================================================================*/
#ifndef cmMakefile_h
#define cmMakefile_h

#include "cmStandardIncludes.h"
#include "cmData.h"
#include "cmSourceFile.h"
#include "cmSystemTools.h"
#include "cmSourceGroup.h"
#include "cmTarget.h"
#include "cmCacheManager.h"

class cmFunctionBlocker;
class cmCommand;
class cmMakefileGenerator;
class cmMakeDepend;

/** \class cmMakefile
 * \brief Process the input CMakeLists.txt file.
 *
 * Process and store into memory the input CMakeLists.txt file.
 * Each CMakeLists.txt file is parsed and the commands found there
 * are added into the build process.
 */
class cmMakefile
{
public:
  /**
   * Return major and minor version numbers for cmake.
   */
  static unsigned int GetMajorVersion() { return 1;}
  static unsigned int GetMinorVersion() { return 3;}
  static const char *GetReleaseVersion() { return "development";}
  
  /**
   * Return the major and minor version of the cmake that
   * was used to write the currently loaded cache, note
   * this method will not work before the cache is loaded.
   */
  static unsigned int GetCacheMajorVersion();
  static unsigned int GetCacheMinorVersion();
  
  /**
   * Construct an empty makefile.
   */
  cmMakefile();

  /**
   * Destructor.
   */
  ~cmMakefile();

  /**
   * Read and parse a CMakeLists.txt file.
   */
  bool ReadListFile(const char* listfile, const char* external= 0); 

  /**
   * Add a wrapper generator.
   */
  void AddCommand(cmCommand* );

  /**
   * Add a function blocker to this makefile
   */
  void AddFunctionBlocker(cmFunctionBlocker *fb)
    { m_FunctionBlockers.insert(fb);}
  void RemoveFunctionBlocker(cmFunctionBlocker *fb)
    { m_FunctionBlockers.erase(fb);}
  void RemoveFunctionBlocker(const char *name, const std::vector<std::string> &args);
  
  /**
   * Specify the makefile generator. This is platform/compiler
   * dependent, although the interface is through a generic
   * superclass.
   */
  void SetMakefileGenerator(cmMakefileGenerator*);
  
  ///! Get the current makefile generator.
  cmMakefileGenerator* GetMakefileGenerator() 
    { return m_MakefileGenerator;}

  /**
   * Produce the output makefile.
   */
  void GenerateMakefile();
  
  /**
   * run the final pass on all commands.
   */
  void FinalPass();
  
  /**
   * Print the object state to std::cout.
   */
  void Print() const;
  
  /**
   * Add a custom command to the build.
   */
  void AddCustomCommand(const char* source,
                        const char* command,
                        const std::vector<std::string>& commandArgs,
                        const std::vector<std::string>& depends,
                        const std::vector<std::string>& outputs,
                        const char *target);

  void AddCustomCommand(const char* source,
                        const char* command,
                        const std::vector<std::string>& commandArgs,
                        const std::vector<std::string>& depends,
                        const char* output,
                        const char* target);
  
  /**
   * Add a define flag to the build.
   */
  void AddDefineFlag(const char* definition);

  /**
   * Add an executable to the build.
   */
  void AddExecutable(const char *exename, 
                     const std::vector<std::string> &srcs);
  void AddExecutable(const char *exename, 
                     const std::vector<std::string> &srcs, bool win32);

  /**
   * Add a utility to the build.  A utiltity target is
   * a command that is run every time a target is built.
   */
  void AddUtilityCommand(const char* utilityName,
                         const char* command,
                         const char* arguments,
                         bool all);
  void AddUtilityCommand(const char* utilityName,
                         const char* command,
                         const char* arguments,
                         bool all,
                         const std::vector<std::string> &depends,
                         const std::vector<std::string> &outputs);

//    /**
//     * Get a list of link libraries in the build.
//     */
//    cmTarget::LinkLibraries& GetLinkLibraries()
//      { 
//      return m_LinkLibraries;
//      }

  /**
   * Get a list of link libraries in the build.
   */
  const cmTarget::LinkLibraries& GetLinkLibraries() const
    { 
    return m_LinkLibraries;
    }

  /**
   * Add a link library to the build.
   */
  void AddLinkLibrary(const char*);
  void AddLinkLibrary(const char*, cmTarget::LinkLibraryType type);
  void AddLinkLibraryForTarget(const char *tgt, const char*, 
                               cmTarget::LinkLibraryType type);

  /**
   * Add a link directory to the build.
   */
  void AddLinkDirectory(const char*);

  /**
   * Add a subdirectory to the build.
   */
  void AddSubDirectory(const char*);

  /**
   * Add an include directory to the build.
   */
  void AddIncludeDirectory(const char*, bool before = false);

  /**
   * Add a variable definition to the build. This variable
   * can be used in CMake to refer to lists, directories, etc.
   */
  void AddDefinition(const char* name, const char* value);
  ///! Add a definition to this makefile and the global cmake cache.
  void AddCacheDefinition(const char* name, const char* value, 
                          const char* doc,
                          cmCacheManager::CacheEntryType type);

  /**
   * Add bool variable definition to the build. 
   */
  void AddDefinition(const char* name, bool);
  ///! Add a definition to this makefile and the global cmake cache.
  void AddCacheDefinition(const char* name, bool, const char* doc);

  /**
   * Specify the name of the project for this build.
   */
  void SetProjectName(const char*);

  /**
   * Get the name of the project for this build.
   */
  const char* GetProjectName()
    {
    return m_ProjectName.c_str();
    }
  
  /**
   * Set the name of the library.
   */
  void AddLibrary(const char *libname, int shared,
                  const std::vector<std::string> &srcs);

  /**
   * Add a class/source file to the build.
   */
  void AddSource(cmSourceFile& ,const char *srcListName);

  /**
   * Remove a class/source file from the build.
   */
  void RemoveSource(cmSourceFile& ,const char *srcListName);

  /**
   * Add a source group for consideration when adding a new source.
   */
  void AddSourceGroup(const char* name, const char* regex);
  
  /**
   * Add an auxiliary directory to the build.
   */
  void AddExtraDirectory(const char* dir);
  

  /**
   * Add an auxiliary directory to the build.
   */
  void MakeStartDirectoriesCurrent()
    {
      m_cmCurrentDirectory = m_cmStartDirectory;
      m_CurrentOutputDirectory = m_StartOutputDirectory;
    }
  
  //@{
  /**
   * Set/Get the home directory (or output directory) in the project. The
   * home directory is the top directory of the project. It is where
   * CMakeSetup or configure was run. Remember that CMake processes
   * CMakeLists files by recursing up the tree starting at the StartDirectory
   * and going up until it reaches the HomeDirectory.  
   */
  void SetHomeDirectory(const char* dir);
  const char* GetHomeDirectory() const
    {
    return m_cmHomeDirectory.c_str();
    }
  void SetHomeOutputDirectory(const char* lib);
  const char* GetHomeOutputDirectory() const
    {
    return m_HomeOutputDirectory.c_str();
    }
  //@}
  
  //@{
  /**
   * Set/Get the start directory (or output directory). The start directory
   * is the directory of the CMakeLists.txt file that started the current
   * round of processing. Remember that CMake processes CMakeLists files by
   * recursing up the tree starting at the StartDirectory and going up until
   * it reaches the HomeDirectory.  
   */
  void SetStartDirectory(const char* dir) 
    {
      m_cmStartDirectory = dir;
      cmSystemTools::ConvertToUnixSlashes(m_cmStartDirectory);
    }
  const char* GetStartDirectory() const
    {
      return m_cmStartDirectory.c_str();
    }
  void SetStartOutputDirectory(const char* lib)
    {
      m_StartOutputDirectory = lib;
      cmSystemTools::ConvertToUnixSlashes(m_StartOutputDirectory);
      cmSystemTools::MakeDirectory(m_StartOutputDirectory.c_str());
    }
  const char* GetStartOutputDirectory() const
    {
      return m_StartOutputDirectory.c_str();
    }
  //@}

  //@{
  /**
   * Set/Get the current directory (or output directory) in the project. The
   * current directory is the directory of the CMakeLists.txt file that is
   * currently being processed. Remember that CMake processes CMakeLists
   * files by recursing up the tree starting at the StartDirectory and going
   * up until it reaches the HomeDirectory.  
   */
  void SetCurrentDirectory(const char* dir) 
    {
      m_cmCurrentDirectory = dir;
      cmSystemTools::ConvertToUnixSlashes(m_cmCurrentDirectory);
    }
  const char* GetCurrentDirectory() const 
    {
      return m_cmCurrentDirectory.c_str();
    }
  void SetCurrentOutputDirectory(const char* lib)
    {
      m_CurrentOutputDirectory = lib;
      cmSystemTools::ConvertToUnixSlashes(m_CurrentOutputDirectory);
    }
  const char* GetCurrentOutputDirectory() const
    {
      return m_CurrentOutputDirectory.c_str();
    }

  /* Get the current CMakeLists.txt file that is being processed.  This
   * is just used in order to be able to 'branch' from one file to a second
   * transparently */
  const char* GetCurrentListFile() const
    {
      return m_cmCurrentListFile.c_str();
    }

  //@}

  /** 
   * Set a regular expression that include files must match
   * in order to be considered as part of the depend information.
   */
  void SetIncludeRegularExpression(const char* regex)
    {
      m_IncludeFileRegularExpression = regex;
    }

  /** 
   * Set a regular expression that include files that are not found
   * must match in order to be considered a problem.
   */
  void SetComplainRegularExpression(const char* regex)
    {
      m_ComplainFileRegularExpression = regex;
    }

  /**
   * Get the list of targets
   */
  cmTargets &GetTargets() { return m_Targets; }
  const cmTargets &GetTargets() const { return m_Targets; }

  /**
   * Get a list of the build subdirectories.
   */
  const std::vector<std::string>& GetSubDirectories()
    { 
    return m_SubDirectories;
    }

  /**
   * Get a list of include directories in the build.
   */
  std::vector<std::string>& GetIncludeDirectories()
    { 
    return m_IncludeDirectories;
    }
  const std::vector<std::string>& GetIncludeDirectories() const
    { 
    return m_IncludeDirectories;
    }

  /**
   * Return a list of source files in this makefile.
   */
  typedef std::map<cmStdString,std::vector<cmSourceFile*> > SourceMap;
  const SourceMap &GetSources() const {return  m_Sources;}
  SourceMap &GetSources() {return  m_Sources;}
  cmSourceFile* GetSource(const char *srclist, const char *sourceName);
  
  /** Get a cmSourceFile pointer for a given source name, if the name is
   *  not found, then a null pointer is returned.
   */
  cmSourceFile* GetSource(const char* sourceName);
  ///! Add a new cmSourceFile to the list of sources for this makefile.
  cmSourceFile* AddSource(cmSourceFile const&);
  
  /**
   * Obtain a list of auxiliary source directories.
   */
  std::vector<std::string>& GetAuxSourceDirectories()
    {return m_AuxSourceDirectories;}

  //@{
  /**
   * Return a list of extensions associated with source and header
   * files
   */
  const std::vector<std::string>& GetSourceExtensions() const
    {return m_SourceFileExtensions;}
  const std::vector<std::string>& GetHeaderExtensions() const
    {return m_HeaderFileExtensions;}
  //@}

  /**
   * Given a variable name, return its value (as a string).
   * If the variable is not found in this makefile instance, the
   * cache is then queried.
   */
  const char* GetDefinition(const char*) const;
  
  /** Test a boolean cache entry to see if it is true or false, 
   *  returns false if no entry defined.
   */
  bool IsOn(const char* name) const;

  /**
   * Get a list of preprocessor define flags.
   */
  const char* GetDefineFlags()
    {return m_DefineFlags.c_str();}
  
  /**
   * Get the vector of used command instances.
   */
  const std::vector<cmCommand*>& GetUsedCommands() const
    {return m_UsedCommands;}
  
  /**
   * Get the vector source groups.
   */
  const std::vector<cmSourceGroup>& GetSourceGroups() const
    { return m_SourceGroups; }

  /**
   * Get the vector of list files on which this makefile depends
   */
  const std::vector<std::string>& GetListFiles() const
    { return m_ListFiles; }
  
  ///! When the file changes cmake will be re-run from the build system.
  void AddCMakeDependFile(const char* file)
    { m_ListFiles.push_back(file);}
  
  /**
   * Dump documentation to a file. If 0 is returned, the
   * operation failed.
   */
  int DumpDocumentationToFile(std::ostream&);

  /**
   * Expand all defined varibles in the string.  
   * Defined varibles come from the m_Definitions map.
   * They are expanded with ${var} where var is the
   * entry in the m_Definitions map.  Also @var@ is
   * expanded to match autoconf style expansions.
   */
  const char *ExpandVariablesInString(std::string& source) const;
  const char *ExpandVariablesInString(std::string& source, bool escapeQuotes,
                                      bool atOnly = false) const;

  /**
   * Remove any remaining variables in the string. Anything with ${var} or
   * @var@ will be removed.  
   */
  void RemoveVariablesInString(std::string& source, bool atOnly = false) const;

  /**
   * Expand variables in the makefiles ivars such as link directories etc
   */
  void ExpandVariables();  

  /** Recursivly read and create a cmMakefile object for
   *  all CMakeLists.txt files in the GetSubDirectories list.
   *  Once the file is found, it ReadListFile is called on
   *  the cmMakefile created for it.  CreateObject is called on 
   *  the prototype to create a cmMakefileGenerator for each cmMakefile that 
   *  is created.
   */
  void FindSubDirectoryCMakeListsFiles(std::vector<cmMakefile*>& makefiles);
  
  /**
   * find what source group this source is in
   */
  cmSourceGroup& FindSourceGroup(const char* source,
                                 std::vector<cmSourceGroup> &groups);

  void RegisterData(cmData*);
  void RegisterData(const char*, cmData*);
  cmData* LookupData(const char*) const;
  
  /**
   * execute a single CMake command
   */
  void ExecuteCommand(std::string &name, std::vector<std::string> const& args);
  
  /** Check if a command exists. */
  bool CommandExists(const char* name) const;
    
  ///! Enable support for the named language, if null then all languages are enabled.
  void EnableLanguage(const char* );

  /**
   * Adds the specified library to the explicit dependency list of target.
   */
  void AddDependencyToCache( std::string target, const std::string& lib );
  
protected:
  std::string m_Prefix;
  std::vector<std::string> m_AuxSourceDirectories; // 

  std::string m_cmCurrentDirectory; 
  std::string m_CurrentOutputDirectory; 
  std::string m_cmStartDirectory; 
  std::string m_StartOutputDirectory; 
  std::string m_cmHomeDirectory; 
  std::string m_HomeOutputDirectory;
  std::string m_cmCurrentListFile;

  std::string m_ProjectName;	// project name

  // libraries, classes, and executables
  cmTargets m_Targets;
  SourceMap m_Sources; 
  std::vector<cmSourceFile*> m_SourceFiles;
  

  std::vector<std::string> m_SubDirectories; // list of sub directories
  struct StringSet : public std::set<cmStdString>
  {
  };
  
  // The include and link-library paths.  These may have order
  // dependency, so they must be vectors (not set).
  std::vector<std::string> m_IncludeDirectories;
  std::vector<std::string> m_LinkDirectories;
  
  std::vector<std::string> m_ListFiles; // list of command files loaded
  
  
  cmTarget::LinkLibraries m_LinkLibraries;

  std::string m_IncludeFileRegularExpression;
  std::string m_ComplainFileRegularExpression;
  std::vector<std::string> m_SourceFileExtensions;
  std::vector<std::string> m_HeaderFileExtensions;
  std::string m_DefineFlags;
  std::vector<cmSourceGroup> m_SourceGroups;
  typedef std::map<cmStdString, cmCommand*> RegisteredCommandsMap;
  typedef std::map<cmStdString, cmStdString> DefinitionMap;
  DefinitionMap m_Definitions;
  RegisteredCommandsMap m_Commands;
  std::vector<cmCommand*> m_UsedCommands;
  cmMakefileGenerator* m_MakefileGenerator;
  bool IsFunctionBlocked(const char *name, std::vector<std::string> const& args);
  
private:
  /**
   * Get the name of the parent directories CMakeLists file
   * given a current CMakeLists file name
   */
  std::string GetParentListFileName(const char *listFileName);

  void ReadSources(std::ifstream& fin, bool t);
  friend class cmMakeDepend;	// make depend needs direct access 
				// to the m_Sources array 
  void PrintStringVector(const char* s, const std::vector<std::string>& v) const;
  void AddDefaultCommands();
  void AddDefaultDefinitions();
  std::set<cmFunctionBlocker *> m_FunctionBlockers;
  
  typedef std::map<cmStdString, cmData*> DataMap;
  DataMap m_DataMap;
  bool m_Inheriting;
};


#endif
