// Created on: 1993-10-15
// Created by: Remi LEQUETTE
// Copyright (c) 1993-1999 Matra Datavision
// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.


#include <BRepAlgoAPI_BooleanOperation.hxx>

#include <BOPAlgo_Alerts.hxx>
#include <BOPAlgo_BOP.hxx>
#include <BOPAlgo_PaveFiller.hxx>
#include <BOPAlgo_Section.hxx>
#include <BRepAlgoAPI_Check.hxx>
#include <BRepTools.hxx>

#include <OSD_Environment.hxx>
#include <OSD_File.hxx>
#include <TCollection_AsciiString.hxx>

#include <stdio.h>

//=======================================================================
//class : BRepAlgoAPI_DumpOper
//purpose : Dumps the arguments ad script to perform operation in DRAW
//=======================================================================
class BRepAlgoAPI_DumpOper {
 public:
  BRepAlgoAPI_DumpOper() :
    myIsDump(Standard_False),
    myIsDumpArgs(Standard_False),
    myIsDumpRes(Standard_False)  {
      OSD_Environment env("CSF_DEBUG_BOP");
      TCollection_AsciiString pathdump = env.Value();
      myIsDump = (!pathdump.IsEmpty() ? Standard_True: Standard_False);
      myPath=pathdump.ToCString();
  };
  //
  virtual ~BRepAlgoAPI_DumpOper() {
  };
  //
  Standard_Boolean IsDump()const {
    return myIsDump;
  };
  //
  void SetIsDumpArgs(const Standard_Boolean bFlag) {
    myIsDumpArgs=bFlag;
  }
  //
  Standard_Boolean IsDumpArgs()const {
    return myIsDumpArgs;
  };
  //
  void SetIsDumpRes(const Standard_Boolean bFlag) {
    myIsDumpRes=bFlag;
  };
  //
  Standard_Boolean IsDumpRes()const {
    return myIsDumpRes;
  };
  //
  void Dump(
            const TopoDS_Shape& theShape1,
            const TopoDS_Shape& theShape2,
            const TopoDS_Shape& theResult,
            BOPAlgo_Operation theOperation);
  //
 protected:
  Standard_Boolean myIsDump;
  Standard_Boolean myIsDumpArgs;
  Standard_Boolean myIsDumpRes;
  Standard_CString myPath;
};

//=======================================================================
//function : BRepAlgoAPI_BooleanOperation
//purpose  : 
//=======================================================================
BRepAlgoAPI_BooleanOperation::BRepAlgoAPI_BooleanOperation()
:
  BRepAlgoAPI_BuilderAlgo(),
  myOperation(BOPAlgo_UNKNOWN)
{
}
//=======================================================================
//function : BRepAlgoAPI_BooleanOperation
//purpose  : 
//=======================================================================
BRepAlgoAPI_BooleanOperation::BRepAlgoAPI_BooleanOperation
  (const BOPAlgo_PaveFiller& thePF)
:
  BRepAlgoAPI_BuilderAlgo(thePF),
  myOperation(BOPAlgo_UNKNOWN)
{
}
//=======================================================================
//function : BRepAlgoAPI_BooleanOperation
//purpose  : obsolete
//=======================================================================
BRepAlgoAPI_BooleanOperation::BRepAlgoAPI_BooleanOperation
  (const TopoDS_Shape& theS1,
   const TopoDS_Shape& theS2,
   const BOPAlgo_Operation theOp)
:
  BRepAlgoAPI_BuilderAlgo(),
  myOperation(theOp)
{
  myArguments.Append(theS1);
  myTools.Append(theS2);
}
//=======================================================================
//function : BRepAlgoAPI_BooleanOperation
//purpose  : 
//=======================================================================
BRepAlgoAPI_BooleanOperation::BRepAlgoAPI_BooleanOperation
  (const TopoDS_Shape& theS1,
   const TopoDS_Shape& theS2,
   const BOPAlgo_PaveFiller& thePF,
   const BOPAlgo_Operation theOp)
:
  BRepAlgoAPI_BuilderAlgo(thePF),
  myOperation(theOp)
{
  myArguments.Append(theS1);
  myTools.Append(theS2);
}
//=======================================================================
//function : Build
//purpose  :
//=======================================================================
void BRepAlgoAPI_BooleanOperation::Build()
{
  // Set Not Done status by default
  NotDone();
  // Clear from previous runs
  Clear();
  // Check for availability of arguments and tools
  // Both should be present
  if (myArguments.IsEmpty() || myTools.IsEmpty())
  {
    AddError (new BOPAlgo_AlertTooFewArguments);
    return;
  }
  // Check if the operation is set
  if (myOperation == BOPAlgo_UNKNOWN)
  {
    AddError (new BOPAlgo_AlertBOPNotSet);
    return;
  }

  // DEBUG option for dumping shapes and scripts
  BRepAlgoAPI_DumpOper aDumpOper;
  {
    if (aDumpOper.IsDump()) {
      BRepAlgoAPI_Check aChekArgs(myArguments.First(), myTools.First(), myOperation);
      aDumpOper.SetIsDumpArgs(!aChekArgs.IsValid());
    }
  }

  // If necessary perform intersection of the argument shapes
  if (myIsIntersectionNeeded)
  {
    // Combine Objects and Tools into a single list for intersection
    TopTools_ListOfShape aLArgs = myArguments;
    for (TopTools_ListOfShape::Iterator it(myTools); it.More(); it.Next())
      aLArgs.Append(it.Value());

    // Perform intersection
    IntersectShapes(aLArgs);
    if (HasErrors())
    {
      if (aDumpOper.IsDump())
      {
        aDumpOper.SetIsDumpRes(Standard_False);
        aDumpOper.Dump(myArguments.First(), myTools.First(), TopoDS_Shape(), myOperation);
      }
      return;
    }
  }

  // Builder Initialization
  if (myOperation == BOPAlgo_SECTION)
  {
    myBuilder = new BOPAlgo_Section(myAllocator);
    myBuilder->SetArguments(myDSFiller->Arguments());
  }
  else
  {
    myBuilder = new BOPAlgo_BOP(myAllocator);
    myBuilder->SetArguments(myArguments);
    ((BOPAlgo_BOP*)myBuilder)->SetTools(myTools);
    ((BOPAlgo_BOP*)myBuilder)->SetOperation(myOperation);
  }

  // Build the result
  BuildResult();

  if (aDumpOper.IsDump()) {
    Standard_Boolean isDumpRes = myShape.IsNull() ||
                                 !BRepAlgoAPI_Check(myShape).IsValid();
    aDumpOper.SetIsDumpRes(isDumpRes);
    aDumpOper.Dump(myArguments.First(), myTools.First(), myShape, myOperation);
  }
}

//=======================================================================
//function : Dump
//purpose  : DEBUG: Dumping the shapes and script of the operation
//=======================================================================
void BRepAlgoAPI_DumpOper::Dump(const TopoDS_Shape& theShape1,
                                const TopoDS_Shape& theShape2,
                                const TopoDS_Shape& theResult,
                                BOPAlgo_Operation theOperation)
{
  if (!(myIsDumpArgs && myIsDumpRes)) {
    return;
  }
  //
  TCollection_AsciiString aPath(myPath);
  aPath += "/";
  Standard_Integer aNumOper = 1;
  Standard_Boolean isExist = Standard_True;
  TCollection_AsciiString aFileName;
 
  while(isExist)
  {
    aFileName = aPath + "BO_" + TCollection_AsciiString(aNumOper) +".tcl";
    OSD_File aScript(aFileName);
    isExist = aScript.Exists();
    if(isExist)
      aNumOper++;
  }

  FILE* afile = fopen(aFileName.ToCString(), "w+");
  if(!afile)
    return;
  if(myIsDumpArgs)
    fprintf(afile,"%s\n","# Arguments are invalid");

  TCollection_AsciiString aName1;
  TCollection_AsciiString aName2;
  TCollection_AsciiString aNameRes;
  if(!theShape1.IsNull())
  {
    aName1 = aPath +
      "Arg1_" + TCollection_AsciiString(aNumOper) + ".brep";
    BRepTools::Write(theShape1, aName1.ToCString());
  }
  else
    fprintf(afile,"%s\n","# First argument is Null ");
   
  if(!theShape2.IsNull())
  {
    aName2 =  aPath +
      "Arg2_"+ TCollection_AsciiString(aNumOper) + ".brep";

    BRepTools::Write(theShape2, aName2.ToCString());
  }
  else
    fprintf(afile,"%s\n","# Second argument is Null ");
   
   if(!theResult.IsNull())
  {
    aNameRes =  aPath +
      "Result_"+ TCollection_AsciiString(aNumOper) + ".brep";

    BRepTools::Write(theResult, aNameRes.ToCString());
  }
  else
    fprintf(afile,"%s\n","# Result is Null ");
  
  fprintf(afile, "%s %s %s\n","restore",  aName1.ToCString(), "arg1");
  fprintf(afile, "%s %s %s\n","restore",  aName2.ToCString(), "arg2");
  TCollection_AsciiString aBopString;
  switch (theOperation)
  {
    case BOPAlgo_COMMON : aBopString += "bcommon Res "; break;
    case BOPAlgo_FUSE   : aBopString += "bfuse Res "; break;
    case BOPAlgo_CUT    : 
    case BOPAlgo_CUT21  : aBopString += "bcut Res "; break;
    case BOPAlgo_SECTION : aBopString += "bsection Res "; break;
    default : break;
  };
  aBopString += ("arg1 arg2");
  if(theOperation == BOPAlgo_CUT21)
    aBopString += " 1";

  fprintf(afile, "%s\n",aBopString.ToCString());
  fclose(afile);
}