@echo off
setlocal ENABLEEXTENSIONS
setlocal enableDelayedExpansion

@rem set local scope for the variables with windows NT shell
if "%OS%"=="Windows_NT" setlocal

@rem get script directory name
set DIRNAME=%~dp0\..\.cache
if "%DIRNAME%" == "" set DIRNAME=.

@rem strip trailing backslash from DIRNAME path to make it easier to work with
IF %DIRNAME:~-1%==\ SET DIRNAME=%DIRNAME:~0,-1%

@rem get OS bitness
reg Query "HKLM\Hardware\Description\System\CentralProcessor\0" | find /i "x86" > NUL && set OS_BITNESS=32BIT || set OS_BITNESS=64BIT

set UNZIP_EXE=%DIRNAME%\7zip\7z.exe

@rem require 7zip to unzip the cmake dist because windows sucks
if not exist %UNZIP_EXE% (
    echo Downloading 7zip...

    if %OS_BITNESS%==64BIT (
        call :downloadFile https://www.7-zip.org/a/7z1801-x64.exe %TEMP%\7zInstall.exe
    ) else (
        call :downloadFile https://www.7-zip.org/a/7z1801.exe %TEMP%\7zInstall.exe   
    )

    echo Installing 7zip

    @rem don't forget the trailing backslash here because 7zip is too stupid to deal with paths and just removes the last char
    %TEMP%\7zInstall.exe /S /D=%DIRNAME%\7zip\
    del %TEMP%\7zInstall.exe
)
if not "%OS%" == "Windows_NT" goto win9xME_args
if "%@eval[2+2]" == "4" goto 4NT_args

:win9xME_args
@rem Slurp the command line arguments.
set CMD_LINE_ARGS=
set _SKIP=2

:win9xME_args_slurp
if "x%~1" == "x" goto runCmake

set CMD_LINE_ARGS=%*
goto runCmake

:4NT_args
@rem Get arguments from the 4NT Shell from JP Software
set CMD_LINE_ARGS=%$

:runCmake

%UNZIP_EXE% %CMD_LINE_ARGS%
goto end


@rem args: fileUrl, filePath
:downloadFile
powershell -Command "(New-Object Net.WebClient).DownloadFile('%~1', '%~2')" 
EXIT /B 0

:end
if "%OS%"=="Windows_NT" endlocal