<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" DefaultTargets="GenerateHeaders">

  <Import Project="paths.props" Condition="'$(PyPathsIncluded)' != 'True'"/>

  <!--Generate qstrdefs.generated.h and mpversion.h similar to what is done in py/mkrules.mk and py/py.mk-->
  <Target Name="GenerateHeaders" DependsOnTargets="MakeVersionHdr;MakeQstrData">
  </Target>

  <PropertyGroup>
    <DestDir>$(PyBuildDir)genhdr\</DestDir>
    <PySrcDir>$(PyBaseDir)py\</PySrcDir>
    <QstrDefs>$(PyBaseDir)unix\qstrdefsport.h</QstrDefs>
    <PyQstrDefs>$(PySrcDir)qstrdefs.h</PyQstrDefs>
    <QstrDefsCollected>$(DestDir)qstrdefscollected.h</QstrDefsCollected>
    <QstrGen>$(DestDir)qstrdefs.generated.h</QstrGen>
    <PyPython Condition="'$(PyPython)' == ''">python</PyPython>
  </PropertyGroup>

  <Target Name="MakeDestDir">
    <MakeDir Directories="$(DestDir)"/>
  </Target>

  <!-- Concatenate preprocessed files for use with makeqstrdefs.py.
       Filters out any lines which aren't used by makeqstrdefs.py so the resulting file is
       hundreds of times smaller and processing in python takes substantially less time-->
  <UsingTask TaskName="ConcatPreProcFiles" TaskFactory="CodeTaskFactory" AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.v4.0.dll" >
    <ParameterGroup>
      <OutputFile Required="true" ParameterType="System.String"/>
      <InputFiles Required="true" ParameterType="System.String[]"/>
    </ParameterGroup>
    <Task>
      <Code Type="Fragment" Language="cs">
        <![CDATA[
using(var outFile = System.IO.File.CreateText(OutputFile)) {
  foreach(var inFile in InputFiles)
    foreach(var line in System.IO.File.ReadAllLines(inFile))
      if((line.Contains(".c") && line.StartsWith("#line")) || line.Contains("MP_QSTR"))
        outFile.WriteLine( line );
}
        ]]>
      </Code>
    </Task>
  </UsingTask>

  <!-- Preprocess changed files, concatenate and feed into makeqstrdefs.py split/cat-->
  <Target Name="MakeQstrDefs" DependsOnTargets="MakeDestDir" Inputs="@(ClCompile)" Outputs="$(QstrDefsCollected)">
    <ItemGroup>
      <PyIncDirs Include="$(PyIncDirs)"/>
      <PreProcDefs Include="%(ClCompile.PreProcessorDefinitions);NO_QSTR;N_X64;N_X86;N_THUMB;N_ARM"/>
      <PyQstrSourceFiles Include="@(ClCompile)">
        <OutFile>$([System.String]::new('%(FullPath)').Replace('$(PyBaseDir)', '$(DestDir)qstr\'))</OutFile>
      </PyQstrSourceFiles>
      <PyQstrSourceFiles>
        <OutFile>$([System.IO.Path]::ChangeExtension('%(OutFile)', '.pp'))</OutFile>
        <OutDir>$([System.IO.Path]::GetDirectoryName('%(OutFile)'))</OutDir>
      </PyQstrSourceFiles>
      <PyQstrSourceFiles>
        <Changed>$([System.DateTime]::Compare($([System.IO.File]::GetLastWriteTime('%(FullPath)')), $([System.IO.File]::GetLastWriteTime('%(OutFile)'))))</Changed>
      </PyQstrSourceFiles>
    </ItemGroup>

    <MakeDir Directories="@(PyQstrSourceFiles->'%(OutDir)')"/>
    <Exec Command="cl /nologo /I@(PyIncDirs, ' /I') /D@(PreProcDefs, ' /D') /Fi%(PyQstrSourceFiles.OutFile) /P %(PyQstrSourceFiles.Identity)"
          Condition="%(PyQstrSourceFiles.Changed) &gt; 0"/>
    <ConcatPreProcFiles InputFiles="@(PyQstrSourceFiles->'%(OutFile)')" OutputFile="$(DestDir)qstr.i.last"
                        Condition="%(PyQstrSourceFiles.Changed) &gt; 0"/>
    <Exec Command="$(PyPython) $(PySrcDir)makeqstrdefs.py split $(DestDir)qstr.i.last $(DestDir)qstr $(QstrDefsCollected)"/>
    <Exec Command="$(PyPython) $(PySrcDir)makeqstrdefs.py cat $(DestDir)qstr.i.last $(DestDir)qstr $(QstrDefsCollected)"/>
  </Target>

  <Target Name="MakeQstrData" DependsOnTargets="MakeQstrDefs" Inputs="$(QstrDefsCollected);$(PyQstrDefs);$(QstrDefs)" Outputs="$(QstrGen)">
    <PropertyGroup>
      <TmpFile>$(QstrGen).tmp</TmpFile>
    </PropertyGroup>
    <Exec Command="cl /nologo /I@(PyIncDirs, ' /I') /D@(PreProcDefs, ' /D') /E $(PyQstrDefs) $(QstrDefs) > $(DestDir)qstrdefspreprocessed.h"/>
    <Exec Command="$(PyPython) $(PySrcDir)makeqstrdata.py $(DestDir)qstrdefspreprocessed.h $(QstrDefsCollected) > $(TmpFile)"/>
    <MSBuild Projects="$(MSBuildThisFileFullPath)" Targets="CopyFileIfDifferent" Properties="SourceFile=$(TmpFile);DestFile=$(QstrGen)"/>
  </Target>

  <Target Name="MakeVersionHdr" DependsOnTargets="MakeDestDir">
    <PropertyGroup>
      <DestFile>$(DestDir)mpversion.h</DestFile>
      <TmpFile>$(DestFile).tmp</TmpFile>
    </PropertyGroup>
    <Exec Command="$(PyPython) $(PySrcDir)makeversionhdr.py $(TmpFile)"/>
    <MSBuild Projects="$(MSBuildThisFileFullPath)" Targets="CopyFileIfDifferent" Properties="SourceFile=$(TmpFile);DestFile=$(DestFile)"/>
  </Target>

  <!--Copies SourceFile to DestFile only if SourceFile's content differs from DestFile's.
      We use this to 'touch' the generated files only when they are really newer
      so a build is only triggered if the generated content actually changed,
      and not just because the file date changed since the last build-->
  <Target Name="CopyFileIfDifferent">
    <Exec Command="fc /B $(SourceFile) $(DestFile) > NUL 2>&amp;1" IgnoreExitCode="true">
      <Output TaskParameter="ExitCode" PropertyName="FilesDiffer" />
    </Exec>
    <Copy SourceFiles="$(SourceFile)" DestinationFiles="$(DestFile)" Condition="'$(FilesDiffer)'!='0'"/>
  </Target>

</Project>
