#include <creaImageIOTreeHandlerImageAdder.h>
#include <creaImageIOSystem.h>
#include "boost/filesystem.hpp"
#include <boost/filesystem/operations.hpp>
#include <boost/utility.hpp>


namespace fs = boost::filesystem;
using boost::filesystem::path;
using boost::next;
using boost::prior;


using namespace crea;

namespace creaImageIO
{
  //====================================================================
  // Ctor
  TreeHandlerImageAdder::TreeHandlerImageAdder(TreeHandler* tree)
    : mTreeHandler(tree)
  {
  }
  // Dtor
  TreeHandlerImageAdder::~TreeHandlerImageAdder()
  {
  }
  //====================================================================

  //====================================================================
  void TreeHandlerImageAdder::ConnectProgressObserver(ProgressCallbackType callback)
  {
    mProgressSignal.connect(callback);
  }
  //====================================================================

  //=====================================================================
  bool TreeHandlerImageAdder::IsHandledFile( const std::string& filename)
  {
    return (mReader.CanRead(filename));
  }
  //=====================================================================

  //=====================================================================
  void TreeHandlerImageAdder::AddFiles( const std::vector<std::string>& filenames)
  {
    mProgress.Reset();
	
    unsigned int nbf = filenames.size(); 
    std::vector<std::string>::const_iterator i;
    for (i=filenames.begin();i!=filenames.end();++i)
      {
	mTimestampHandler->AddFile((*i), fs::last_write_time(*i), time(0));
	mProgress.IncNumberScannedFiles();
	if (IsHandledFile(*i)) 
	  {
	    mProgress.IncNumberHandledFiles();
		mSynchronizer->InsertAddOp((*i),"0","1");
		std::string addKey=mSynchronizer->GetAttribute("ADD_KEY","ADD_OPS","PATH",(*i));
		std::stringstream removedOn;
		removedOn<<time(0);
		mSynchronizer->InsertIgnoreFile(addKey,(*i),"0",removedOn.str());
	    AddFile(*i);
	  }
	mProgressSignal(mProgress);
	if (mProgress.GetStop()) break;
      }
  }
  //=====================================================================

  //=====================================================================
  void TreeHandlerImageAdder::AddDirectory( const std::string& directory,
					    bool recurse)
  {
    mProgress.Reset();
	std::stringstream files;
	
	std::stringstream rec;
	rec<<recurse;
	mSynchronizer->InsertAddOp(directory,rec.str(),"0");
	std::string addKey=mSynchronizer->GetAttribute("ADD_KEY","ADD_OPS","PATH",directory);
	AddDirectoryRecursor( directory, recurse, addKey );
	
	int nFiles=GetProgress().GetNumberAddedFiles();
	files<<nFiles;
	mSynchronizer->SetAttribute("FILES_ADDED","ADD_OPS",files.str(),"ADD_KEY",addKey);
    GimmickDebugMessage(3,mProgress<<std::endl);
  }

  //=====================================================================
  void TreeHandlerImageAdder::AddFile( const std::string& filename )
  {
    GimmickDebugMessage(4,"Adding '"<<filename<<"'"<<std::endl);
    std::map< std::string, std::string>  attr;
    mTreeHandler->GetTree().GetDescriptor().BuildAttributeMap(attr);

    mReader.ReadAttributes(filename,attr);

    int lev = mTreeHandler->AddBranch(attr);

    // update the progress according to lev
    if (lev<mTreeHandler->GetTree().GetNumberOfLevels())
      mProgress.IncNumberAddedFiles();
  }
  //=====================================================================

  void TreeHandlerImageAdder::RemoveFile( tree::Node* node)
  {
		int n=node->GetNumberOfChildren();
		if(n>0)
		{
			RemoveFiles(node->GetChildrenList());
		}
		else
		{
		  std::string path=node->GetAttribute("FullFileName");
		  //Gets the add key
		  std::string addKey=mSynchronizer->GetAttribute("ADD_KEY","IGNORED_FILES","PATH",path);
		  //Gets the number of files added
		  int files=atoi((mSynchronizer->GetAttribute("FILES_ADDED","ADD_OPS","ADD_KEY",addKey)).c_str());
		  files=files-1;
		  std::stringstream out;
		  out<<files;
		  //Sets the new number of files
		  mSynchronizer->SetAttribute("FILES_ADDED","ADD_OPS",out.str(),"ADD_KEY",addKey);
		  //Sets the file as removed
		  mSynchronizer->SetAttribute("REMOVE","IGNORED_FILES","1","PATH",path);
		}
  }

  //=====================================================================

  void TreeHandlerImageAdder::RemoveFiles(const std::vector<tree::Node*>& nodes)
  {
	  std::vector<tree::Node*>::const_iterator it;
	  for(it=nodes.begin();it!=nodes.end();++it)
	  {
		int n=(*it)->GetNumberOfChildren();
		if(n>0)
		{
			RemoveFiles((*it)->GetChildrenList());
		}
		else
		{
		   std::string path=(*it)->GetAttribute("FullFileName");
		  //Gets the add key
		  std::string addKey=mSynchronizer->GetAttribute("ADD_KEY","IGNORED_FILES","PATH",path);
		  //Gets the number of files added
		  int files=atoi((mSynchronizer->GetAttribute("FILES_ADDED","ADD_OPS","ADD_KEY",addKey)).c_str());
		  files=files-1;
		  std::stringstream out;
		  out<<files;
		  //Sets the new number of files
		  mSynchronizer->SetAttribute("FILES_ADDED","ADD_OPS",out.str(),"ADD_KEY",addKey);
		  //Sets the file as removed
		  mSynchronizer->SetAttribute("REMOVE","IGNORED_FILES","1","PATH",path);
		}
	
	  }
  }

  //=====================================================================
  void TreeHandlerImageAdder::AddDirectoryRecursor(const std::string &dirpath, 
						   bool recursive,
						   const std::string &addKey)
  {
    GimmickDebugMessage(4,"Scanning '"<<dirpath<<"'"<<std::endl);
    mProgress.IncNumberScannedDirs();

    if ( !fs::exists( dirpath ) ) return;
	time_t lastModif=fs::last_write_time(dirpath);

    fs::directory_iterator end_itr; // default construction yields past-the-end
    for ( fs::directory_iterator itr( dirpath );
	  itr != end_itr;
	  ++itr )
      {
	// If is directory & recurse : do recurse
	if ( fs::is_directory(itr->status()) )
	  {
	    if (recursive) 
		{
			AddDirectoryRecursor( itr->string(), recursive, addKey);
		}
	  }
	else 
	  {
		std::string parent_id;
		bool valid=mTimestampHandler->AddDirectory(dirpath, itr->string(), lastModif, time(0));
		if(valid)
		{
			mProgress.IncNumberScannedFiles();
			if (IsHandledFile(itr->string()))
			{
			mProgress.IncNumberHandledFiles();
			AddFile( itr->string() );
			mTreeHandler->GetTopLevelNodeId("FullFileName",itr->string(),parent_id);
			mTimestampHandler->SetAttribute("TopLevelNodeId",parent_id,"PATH",itr->string());
			std::stringstream removedOn;
			removedOn<<time(0);
			mSynchronizer->InsertIgnoreFile(addKey, itr->string(),"0",removedOn.str());
			}
			mProgressSignal(mProgress);
			if (mProgress.GetStop()) 
			{
			//itr = end_itr;
			break;
			}
		}
		mTimestampHandler->SetAttribute("TopLevelNodeId",parent_id,"PATH",dirpath);
	  }
      }
	
  }
  //=======================================================================
  
  //=======================================================================

  void TreeHandlerImageAdder::CheckSyncDirectory(const std::string &dirpath, 
												bool recursive, 
												bool repair,
												bool checkAttributes,
												std::vector<std::string> &i_ignorefiles,
												std::vector<std::string> & attsModified,
												std::vector<std::string> & newfiles)
  {
    if ( !fs::exists( dirpath ) ) return;
    fs::directory_iterator end_itr; // default construction yields past-the-end
			  
    for ( fs::directory_iterator itr( dirpath ); itr != end_itr; ++itr ) 
	{
        // If is directory & recurse : do recurse
        if ( fs::is_directory(itr->status()) )
        {
            if (recursive)
			{
                CheckSyncDirectory( itr->string(), recursive, repair, checkAttributes, i_ignorefiles, attsModified, newfiles);
			}
        }
        else
        {
            if (IsHandledFile(itr->string()))
            {
                bool bfound = false;
                for(std::vector<std::string>::iterator it_new = i_ignorefiles.begin(); it_new < i_ignorefiles.end(); ++it_new)
                {
					if((*it_new) == itr->string())
                    {
                        bfound = true;
						//Additional checking of attributes
						if(checkAttributes)
						{
							CheckAttributes(repair,(*it_new),attsModified);
						}
                        i_ignorefiles.erase(it_new);
                        break;
                    }
				}
				if(!bfound && i_ignorefiles.size()>0 )
                {
                    newfiles.push_back( itr->string() );
                }
			}
		}
	 }
  } 

  //=======================================================================
  
  //=======================================================================

  std::string TreeHandlerImageAdder::Synchronize(bool repair, bool checkAttributes)
  {
	  std::vector<AddList> fileList;
	  std::vector<std::string> ignoreList;
	  std::vector<std::string> newFiles;
	  std::vector<std::string> attsModified;
	  std::stringstream mess;
	  std::vector<AddList>::iterator iter;

	  //Gets the list of added files
	  mSynchronizer->GetFileList(fileList);

	  std::vector<std::string>::iterator i;
	  //Actions to take if the user doesn't want to repair
	  if(!repair)
	  {
		//Iterates to see if they are in sync
		for(iter=fileList.begin();iter!=fileList.end();++iter)
		{
			mSynchronizer->GetIgnoredFiles((*iter).key,ignoreList);
			bool rec=true;
			if((*iter).recursive=="0"){rec=false;}
			CheckSyncDirectory((*iter).path,rec,repair,checkAttributes,ignoreList,attsModified,newFiles);
		}

		//Add to message the result of new found files
		mess<<"New Files Found: "<<newFiles.size()<<std::endl;
		if(newFiles.size()>0)
		{
			mess<<"Filenames: "<<std::endl;
			for(i=newFiles.begin();i!=newFiles.end();++i)
			{
				mess<<*i<<std::endl;
			}
		}

		//Add to message the result of missing files
		mess<<"Missing Files: "<<ignoreList.size()<<std::endl;
		if(ignoreList.size()>0)
		{
			mess<<"Filenames: "<<std::endl;
			for(i=ignoreList.begin();i!=ignoreList.end();++i)
			{
				mess<<*i<<std::endl;
			}
		}

		//In the case that the user wants to check the attributes...
		if(checkAttributes)
		{
			//... add to message the result of files that have been changed.
			mess<<"Files with different attributes: "<<attsModified.size()<<std::endl;
			if(attsModified.size()>0)
			{
				mess<<"Filenames: "<<std::endl;
				for(i=attsModified.begin();i!=attsModified.end();++i)
				{
					mess<<*i<<std::endl;
				}
			}
		}
		
	  }

	  //Actions to take if the user wants to repair
	  else
	  {
		  int nf=0;
		//Iterates to see if they are in sync
		for(iter=fileList.begin();iter!=fileList.end();++iter)
		{
			mSynchronizer->GetIgnoredFiles((*iter).key,ignoreList);
			bool rec=true;
			if((*iter).recursive=="0"){rec=false;}
			CheckSyncDirectory((*iter).path,rec,repair,checkAttributes,ignoreList,attsModified,newFiles);

			//For the new files, add them
			for (i=newFiles.begin();i!=newFiles.end();++i)
			{
			mTimestampHandler->AddFile((*i), fs::last_write_time(*i), time(0));
			if (IsHandledFile(*i)) 
			{
				std::stringstream removedOn;
				removedOn<<time(0);
				mSynchronizer->InsertIgnoreFile((*iter).key,(*i),"0",removedOn.str());
				//Gets the number of files added
				int files=atoi((mSynchronizer->GetAttribute("FILES_ADDED","ADD_OPS","ADD_KEY",(*iter).key)).c_str());
				files=files+1;
				std::stringstream out;
				out<<files;
				//Sets the new number of files
				mSynchronizer->SetAttribute("FILES_ADDED","ADD_OPS",out.str(),"ADD_KEY",(*iter).key);
				AddFile(*i);
			}
			}
			nf+=newFiles.size();
			newFiles.clear();

		}
		//Reports number of added files
		mess<<"Files Added: "<<nf<<std::endl;
		
		//Removes the necessary files and reports the results
		if(ignoreList.size()>0)
		{
			tree::Node* node;
			mTreeHandler->LoadChildren(NULL,4);
			for(i=ignoreList.begin();i!=ignoreList.end();++i)
			{
				FindNode(mTreeHandler->GetTree().GetChildrenList()[0],3,"FullFileName",*i,node);
				RemoveFile(node);
				mTreeHandler->Remove(node);
			}
		}
		mess<<"Files Removed: "<<ignoreList.size()<<std::endl;
		//In the case that the user wants to check the attributes...
		if(checkAttributes)
		{
			//... add to message the result of files that were modified.
			mess<<"Files Modified: "<<attsModified.size()<<std::endl;
		}
	  }
	  return mess.str();

  }
  //=======================================================================

  void TreeHandlerImageAdder::CheckAttributes(bool repair, std::string& file, std::vector<std::string>& attsModified)
  {
	  std::map< std::string, std::string>  attr;
	  mTreeHandler->GetTree().GetDescriptor().BuildAttributeMap(attr);
      mReader.ReadAttributes(file,attr);
	  tree::LevelDescriptor::AttributeDescriptorListType adl= mTreeHandler->GetTree().GetAttributeDescriptorList(mTreeHandler->GetTree().GetNumberOfLevels()-1);	
	  tree::LevelDescriptor::AttributeDescriptorListType::const_iterator a;
	  for (a = adl.begin();a!=adl.end();++a)
	  {
	   std::string databaseVal;
	   mTreeHandler->GetAttribute("Image","FullFileName",file,a->GetKey(),databaseVal);
	   std::string fileVal=attr.find(a->GetKey())->second;
	   if ( a->GetFlags()==0 && databaseVal.compare(fileVal)!=0 ) 
	    {
			if(repair)
			{
				mTreeHandler->SetAttribute("Image",a->GetKey(),fileVal,"FullFileName", file);	
			}
			attsModified.push_back(file);
	    }
		
	  }
	  
  }

  //=======================================================================


  void TreeHandlerImageAdder::FindNode(tree::Node* parent, int level, const std::string& searchParam, const std::string& searchVal, tree::Node*& node)
  {
	  if(level>1)
	  {
		  std::vector<tree::Node*>::iterator iter;
		  for(iter=parent->GetChildrenList().begin();iter!=parent->GetChildrenList().end();++iter)
		  {
			  FindNode(*iter,level-1,searchParam,searchVal,node);
		  }
	  }
	  else
	  {
		  if(parent->GetAttribute(searchParam).compare(searchVal)==0)
		  {
			  node=parent;
		  }

	  }
  }
  
  //=======================================================================


 
}