/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying

   file LICENSE.rst or https://cmake.org/licensing for details.  */

#include "cmFLTKWrapUICommand.h"

#include <cstddef>

#include <utility>

#include <cm/memory>

#include <cm/string_view>

#include "cmCustomCommand.h"

#include "cmCustomCommandLines.h"

#include "cmDiagnostics.h"

#include "cmExecutionStatus.h"

#include "cmLocalGenerator.h"

#include "cmMakefile.h"

#include "cmRange.h"

#include "cmSourceFile.h"

#include "cmStringAlgorithms.h"

#include "cmSystemTools.h"

class cmListFileBacktrace;

class cmTarget;

static void FinalAction(cmMakefile& makefile, std::string const& name,

                        cmListFileBacktrace const& lfbt)

{

  // people should add the srcs to the target themselves, but the old command

  // didn't support that, so check and see if they added the files in and if

  // they didn;t then print a warning and add then anyhow

  cmTarget* target = makefile.FindLocalNonAliasTarget(name);

  if (!target) {

    std::string msg = cmStrCat(

      "FLTK_WRAP_UI was called with a target that was never created: ", name,

      ".  The problem was found while processing the source directory: ",

      makefile.GetCurrentSourceDirectory(),

      ".  This FLTK_WRAP_UI call will be ignored.");

    makefile.IssueDiagnostic(cmDiagnostics::CMD_AUTHOR, msg, lfbt);

  }

}

bool cmFLTKWrapUICommand(std::vector<std::string> const& args,

                         cmExecutionStatus& status)

{

  if (args.size() < 2) {

    status.SetError("called with incorrect number of arguments");

    return false;

  }

  cmMakefile& mf = status.GetMakefile();

  // what is the current source dir

  std::string cdir = mf.GetCurrentSourceDirectory();

  std::string const& fluid_exe =

    mf.GetRequiredDefinition("FLTK_FLUID_EXECUTABLE");

  // Target that will use the generated files

  std::string const& target = args[0];

  // get the list of GUI files from which .cxx and .h will be generated

  std::string outputDirectory = mf.GetCurrentBinaryDirectory();

  {

    // Some of the generated files are *.h so the directory "GUI"

    // where they are created have to be added to the include path

    std::vector<std::string> outputDirectories;

    outputDirectories.push_back(outputDirectory);

    mf.AddIncludeDirectories(outputDirectories);

  }

  // List of produced files.

  std::vector<cmSourceFile*> generatedSourcesClasses;

  for (std::string const& arg : cmMakeRange(args).advance(1)) {

    cmSourceFile* curr = mf.GetSource(arg);

    // if we should use the source GUI

    // to generate .cxx and .h files

    if (!curr || !curr->GetPropertyAsBool("WRAP_EXCLUDE")) {

      std::string outName = cmStrCat(

        outputDirectory, '/', cmSystemTools::GetFilenameWithoutExtension(arg));

      std::string hname = cmStrCat(outName, ".h");

      std::string origname = cmStrCat(cdir, '/', arg);

      // add starting depends

      std::vector<std::string> depends;

      depends.push_back(origname);

      depends.push_back(fluid_exe);

      std::string cxxres = cmStrCat(outName, ".cxx");

      cmCustomCommandLines commandLines = cmMakeSingleCommandLine({

        fluid_exe,

        "-c", // instructs Fluid to run in command line

        "-h", // optionally rename .h files

        hname,

        "-o", // optionally rename .cxx files

        cxxres,

        origname // name of the GUI fluid file

      });

      // Add command for generating the .h and .cxx files

      auto hcc = cm::make_unique<cmCustomCommand>();

      hcc->SetDepends(depends);

      hcc->SetCommandLines(commandLines);

      auto ccc = cm::make_unique<cmCustomCommand>(*hcc);

      hcc->SetOutputs(cxxres);

      mf.AddCustomCommandToOutput(std::move(hcc));

      ccc->SetOutputs(hname);

      mf.AddCustomCommandToOutput(std::move(ccc));

      cmSourceFile* sf = mf.GetSource(cxxres);

      sf->AddDepend(hname);

      sf->AddDepend(origname);

      generatedSourcesClasses.push_back(sf);

    }

  }

  // create the variable with the list of sources in it

  size_t lastHeadersClass = generatedSourcesClasses.size();

  std::string sourceListValue;

  for (size_t classNum = 0; classNum < lastHeadersClass; classNum++) {

    if (classNum) {

      sourceListValue += ";";

    }

    sourceListValue += generatedSourcesClasses[classNum]->ResolveFullPath();

  }

  std::string const varName = target + "_FLTK_UI_SRCS";

  mf.AddDefinition(varName, sourceListValue);

  mf.AddGeneratorAction(

    [target](cmLocalGenerator& lg, cmListFileBacktrace const& lfbt) {

      FinalAction(*lg.GetMakefile(), target, lfbt);

    });

  return true;

}