@echo off
rem Install the pixy client on Windows from cmd.exe.
rem
rem   curl -fsSL https://get.demotwo.site/install.cmd -o "%TEMP%\pixy-install.cmd" && "%TEMP%\pixy-install.cmd"
rem
rem Installs to %LOCALAPPDATA%\Programs\pixy. No administrator rights needed.
rem Needs curl.exe, which ships with Windows 10 1803 and later.

setlocal EnableDelayedExpansion

set "BASE=https://get.demotwo.site"
if not "%PIXY_BASE_URL%"=="" set "BASE=%PIXY_BASE_URL%"

set "DEST=%LOCALAPPDATA%\Programs\pixy"
if not "%PIXY_INSTALL%"=="" set "DEST=%PIXY_INSTALL%"

set "ARCH=amd64"
if /i "%PROCESSOR_ARCHITECTURE%"=="ARM64" set "ARCH=arm64"
if /i "%PROCESSOR_ARCHITEW6432%"=="ARM64" set "ARCH=arm64"
set "ASSET=pixy-windows-%ARCH%.exe"

where curl >nul 2>&1
if errorlevel 1 (
    echo error: curl.exe not found ^(requires Windows 10 1803 or later^)
    exit /b 1
)

if not exist "%DEST%" mkdir "%DEST%" 2>nul
if not exist "%DEST%" (
    echo error: cannot create %DEST%
    exit /b 1
)

set "TMPF=%TEMP%\pixy-%RANDOM%%RANDOM%.exe"
set "SUMF=%TEMP%\pixy-sums-%RANDOM%%RANDOM%.txt"

echo.
echo   downloading %ASSET%
curl -fsSL "%BASE%/%ASSET%" -o "%TMPF%"
if errorlevel 1 (
    echo error: download failed: %BASE%/%ASSET%
    exit /b 1
)

rem Verify against the published checksum list when it is reachable.
set "GOT="
set "WANT="
curl -fsSL "%BASE%/checksums.txt" -o "%SUMF%" 2>nul
if exist "%SUMF%" (
    for /f "delims=" %%h in ('certutil -hashfile "%TMPF%" SHA256 ^| findstr /r /c:"^[0-9a-fA-F ]*$"') do (
        if not defined GOT set "GOT=%%h"
    )
    set "GOT=!GOT: =!"
    for /f "tokens=1" %%w in ('findstr /c:" %ASSET%" "%SUMF%"') do (
        if not defined WANT set "WANT=%%w"
    )
    if defined WANT (
        if /i not "!GOT!"=="!WANT!" (
            del /q "%TMPF%" "%SUMF%" 2>nul
            echo error: checksum mismatch for %ASSET%
            exit /b 1
        )
        echo   checksum verified
    )
    del /q "%SUMF%" 2>nul
) else (
    echo   could not fetch checksums.txt; skipping verification
)

move /y "%TMPF%" "%DEST%\pixy.exe" >nul
if errorlevel 1 (
    del /q "%TMPF%" 2>nul
    echo error: could not write %DEST%\pixy.exe ^(is pixy still running?^)
    exit /b 1
)
echo   installed %DEST%\pixy.exe

rem Add to the user PATH. Read the current value from the registry rather than
rem using %PATH%, which is the merged machine+user value: writing that back
rem would copy every machine entry into the user PATH.
set "UPATH="
for /f "tokens=2,*" %%a in ('reg query HKCU\Environment /v PATH 2^>nul ^| findstr /r /c:"REG_[A-Z_]*SZ"') do set "UPATH=%%b"

set "SKIPPATH="
echo(!UPATH! | find /i "%DEST%" >nul && set "SKIPPATH=already"

rem setx writes a plain string, so a user PATH containing %VAR% references would
rem be frozen at today's values. Leave such a PATH alone rather than damage it.
if not defined SKIPPATH (
    echo(!UPATH! | find "%%" >nul && set "SKIPPATH=expandable"
)

rem setx truncates at 1024 characters, which would silently destroy a long PATH.
if not defined SKIPPATH (
    if defined UPATH (set "NEWPATH=!UPATH!;%DEST%") else (set "NEWPATH=%DEST%")
    if not "!NEWPATH:~1023!"=="" set "SKIPPATH=toolong"
)

if not defined SKIPPATH (
    setx PATH "!NEWPATH!" >nul
    echo   added %DEST% to your PATH
    set "PATHADDED=1"
) else (
    if not "!SKIPPATH!"=="already" (
        echo.
        echo   NOTE: your PATH was left unchanged ^(!SKIPPATH!^).
        echo   Add this directory yourself:
        echo       %DEST%
    )
)

rem Usable immediately in this window as well.
set "PATH=%PATH%;%DEST%"

echo.
echo   pixy installed
echo.
echo   Next:
echo       pixy login --token ^<your-token^>
echo       pixy
echo.
if defined PATHADDED echo   ^(Open a new Command Prompt for PATH changes to apply everywhere.^)
if defined PATHADDED echo.

endlocal
exit /b 0