@echo off
setlocal

rem BAT script that downloads and installs a ready to use
rem x64 zlib build for CARLA (carla.org).
rem Run it through a cmd with the x64 Visual C++ Toolset enabled.

set LOCAL_PATH=%~dp0
set FILE_N=    -[%~n0]:

rem Print batch params (debug purpose)
echo %FILE_N% [Batch params]: %*

rem ============================================================================
rem -- Parse arguments ---------------------------------------------------------
rem ============================================================================

:arg-parse
if not "%1"=="" (
    if "%1"=="--build-dir" (
        set BUILD_DIR=%~dpn2
        shift
    )
    if "%1"=="--toolset" (
        set TOOLSET=%~2
        shift
    )
    if "%1"=="-h" (
        goto help
    )
    if "%1"=="--help" (
        goto help
    )
    shift
    goto :arg-parse
)

rem If not set set the build dir to the current dir
if "%BUILD_DIR%" == "" set BUILD_DIR=%~dp0
if not "%BUILD_DIR:~-1%"=="\" set BUILD_DIR=%BUILD_DIR%\

rem If not defined, use Visual Studio 2017 as tool set
if "%TOOLSET%" == "" set TOOLSET=""

rem ============================================================================
rem -- Local Variables ---------------------------------------------------------
rem ============================================================================

set ZLIB_BASENAME=zlib
set ZLIB_VERSION=1.2.11

set ZLIB_TEMP_FOLDER=%ZLIB_BASENAME%-%ZLIB_VERSION%
set ZLIB_TEMP_FILE=%ZLIB_TEMP_FOLDER%.zip
set ZLIB_TEMP_FILE_DIR=%BUILD_DIR%%ZLIB_TEMP_FILE%

set ZLIB_REPO=http://www.zlib.net/zlib%ZLIB_VERSION:.=%.zip

set ZLIB_SRC_DIR=%BUILD_DIR%%ZLIB_BASENAME%-source\
set ZLIB_INSTALL_DIR=%BUILD_DIR%%ZLIB_BASENAME%-install\

rem ============================================================================
rem -- Get zlib ---------------------------------------------------------------
rem ============================================================================

if exist "%ZLIB_INSTALL_DIR%" (
    goto already_build
)

if not exist "%ZLIB_SRC_DIR%" (
    if not exist "%ZLIB_TEMP_FILE_DIR%" (
        echo %FILE_N% Retrieving %ZLIB_BASENAME%.
        powershell -Command "(New-Object System.Net.WebClient).DownloadFile('%ZLIB_REPO%', '%ZLIB_TEMP_FILE_DIR%')"
        if %errorlevel% neq 0 goto error_download
    )
    rem Extract the downloaded library
    echo %FILE_N% Extracting zlib from "%ZLIB_TEMP_FILE%".
    powershell -Command "Expand-Archive '%ZLIB_TEMP_FILE_DIR%' -DestinationPath '%BUILD_DIR%'"
    if %errorlevel% neq 0 goto error_extracting

    rem Remove the no longer needed downloaded file
    echo %FILE_N% Removing "%ZLIB_TEMP_FILE%"
    del "%ZLIB_TEMP_FILE_DIR%"
    rename "%BUILD_DIR%%ZLIB_TEMP_FOLDER%" "%ZLIB_BASENAME%-source"
) else (
    echo %FILE_N% Not downloading zlib because already exists the folder "%ZLIB_SRC_DIR%".
)

if not exist "%ZLIB_SRC_DIR%build" (
    echo %FILE_N% Creating "%ZLIB_SRC_DIR%build"
    mkdir "%ZLIB_SRC_DIR%build"
)

cd "%ZLIB_SRC_DIR%build"

rem -DCMAKE_BUILD_TYPE=Release^
rem -DCMAKE_CONFIGURATION_TYPES=Release^
cmake -G "NMake Makefiles"^
 -DCMAKE_INSTALL_PREFIX="%ZLIB_INSTALL_DIR:\=/%"^
 -DCMAKE_BUILD_TYPE=Release^
 "%ZLIB_SRC_DIR%"
if %errorlevel% neq 0 goto error_cmake

rem https://stackoverflow.com/questions/601970/how-do-i-utilise-all-the-cores-for-nmake
set CL=/MP

nmake install
if %errorlevel% neq 0 goto error_install

goto success

rem ============================================================================
rem -- Messages and Errors -----------------------------------------------------
rem ============================================================================

:help
    echo %FILE_N% Download and install a zlib.
    echo "Usage: %FILE_N% [-h^|--help] [--toolset] [--build-dir]"
    goto eof

:success
    echo.
    echo %FILE_N% zlib has been successfully installed in "%ZLIB_INSTALL_DIR%"!
    goto good_exit

:already_build
    echo %FILE_N% A zlib installation already exists.
    echo %FILE_N% Delete "%ZLIB_INSTALL_DIR%" if you want to force a rebuild.
    goto good_exit

:error_download
    echo.
    echo %FILE_N% [DOWNLOAD ERROR] An error ocurred while downloading zlib.
    echo %FILE_N% [DOWNLOAD ERROR] Possible causes:
    echo %FILE_N%              - Make sure that the following url is valid:
    echo %FILE_N% "%ZLIB_REPO%"
    echo %FILE_N% [DOWNLOAD ERROR] Workaround:
    echo %FILE_N%              - Download the zlib's source code and
    echo %FILE_N%                extract the content in
    echo %FILE_N%                "%ZLIB_SRC_DIR%"
    echo %FILE_N%                And re-run the setup script.
    goto bad_exit

:error_extracting
    echo.
    echo %FILE_N% [EXTRACTING ERROR] An error ocurred while extracting the zip.
    echo %FILE_N% [EXTRACTING ERROR] Workaround:
    echo %FILE_N%              - Download the libpng's source code and
    echo %FILE_N%                extract the content manually in
    echo %FILE_N%                "%ZLIB_SRC_DIR%"
    echo %FILE_N%                And re-run the setup script.
    goto bad_exit

:error_cmake
    echo.
    echo %FILE_N% [CMAKE ERROR] An error ocurred while executing cmake command.
    echo %FILE_N% [CMAKE ERROR] Possible causes:
    echo %FILE_N%                - Make sure "CMake" is installed.
    echo %FILE_N%                - Make sure it is available on your Windows "path".
    echo %FILE_N%                - Make sure you have cmake 3.12.4 or higher installed.
    goto bad_exit

:error_install
    echo.
    echo %FILE_N% [NMAKE ERROR] An error ocurred while compiling and installing using nmake.
    goto bad_exit

:good_exit
    echo %FILE_N% Exiting...
    rem A return value used for checking for errors
    endlocal & set install_zlib=%ZLIB_INSTALL_DIR%
    exit /b 0

:bad_exit
    if exist "%ZLIB_INSTALL_DIR%" rd /s /q "%ZLIB_INSTALL_DIR%"
    echo %FILE_N% Exiting with error...
    endlocal
    exit /b %errorlevel%