@echo off
setlocal enabledelayedexpansion
set "SOURCE_ARG=%~f2"
cd /d "%~dp0"
title TinyVM - Windows Interactive Build ^& Run
if /i "%~1"=="help" goto :show_help
if /i "%~1"=="--help" goto :show_help
if /i "%~1"=="-h" goto :show_help

REM everything built or generated goes under build\ (executables in build\bin);
REM the tree holds sources only. the cores take their genome in with c23 #embed,
REM so the compiler has to be clang 19 or gcc 15 or later.

REM =========================================================================
REM Compiler Detection & Environment Setup
REM =========================================================================

set "CC_NAME="
if not exist "build\probe" mkdir "build\probe"
> "build\probe\probe.bin" echo ab
> "build\probe\probe.c" echo static const unsigned char probe[] = {
>> "build\probe\probe.c" echo #embed "probe.bin"
>> "build\probe\probe.c" echo };
>> "build\probe\probe.c" echo int main(void) { return sizeof probe ^> 0 ? 0 : 1; }

REM preserve a compiler selected by the caller, if it can #embed.
if defined CC (
    call :probe_cc "%CC%"
    if not errorlevel 1 (
        set "CC_NAME=Configured [%CC%]"
        goto :has_compiler
    )
    echo [ERROR] CC=%CC% does not support #embed; clang 19 or gcc 15 is needed.
    exit /b 1
)

REM 1. WinGet LLVM-MinGW portable packages (self-contained with CRT headers)
for /d %%D in ("%LOCALAPPDATA%\Microsoft\WinGet\Packages\MartinStorsjo.LLVM-MinGW*") do (
    for /d %%B in ("%%D\llvm-mingw*") do (
        if exist "%%B\bin\clang.exe" (
            call :probe_cc "%%B\bin\clang.exe"
            if not errorlevel 1 (
                set "PATH=%%B\bin;!PATH!"
                set "CC=clang"
                set "CC_NAME=LLVM-MinGW Clang [WinGet]"
                goto :has_compiler
            )
        )
    )
)

REM 2. clang or gcc already in PATH
for %%C in (clang gcc) do (
    where %%C >nul 2>nul
    if !errorlevel! equ 0 (
        call :probe_cc %%C
        if not errorlevel 1 (
            set "CC=%%C"
            set "CC_NAME=%%C [in PATH]"
            goto :has_compiler
        )
    )
)

REM 3. C:\Program Files\LLVM\bin and the x86 variant
if exist "%ProgramFiles%\LLVM\bin\clang.exe" (
    call :probe_cc "%ProgramFiles%\LLVM\bin\clang.exe"
    if not errorlevel 1 (
        set "PATH=%ProgramFiles%\LLVM\bin;%PATH%"
        set "CC=clang"
        set "CC_NAME=LLVM Clang [Program Files]"
        goto :has_compiler
    )
)
set "PFX86=%ProgramFiles(x86)%"
if defined PFX86 if exist "!PFX86!\LLVM\bin\clang.exe" (
    call :probe_cc "!PFX86!\LLVM\bin\clang.exe"
    if not errorlevel 1 (
        set "PATH=!PFX86!\LLVM\bin;%PATH%"
        set "CC=clang"
        set "CC_NAME=LLVM Clang [Program Files x86]"
        goto :has_compiler
    )
)

echo [ERROR] No C compiler with #embed support [clang 19 or gcc 15 and later] was found.
echo.
echo Please install LLVM / Clang:
echo   winget install MartinStorsjo.LLVM-MinGW.UCRT
echo   or: winget install LLVM.LLVM
echo.
pause
exit /b 1

REM :probe_cc compiler - errorlevel 0 when it compiles a file that uses #embed
:probe_cc
%1 -w --embed-dir=build\probe build\probe\probe.c -o build\probe\probe.exe >nul 2>nul
exit /b %errorlevel%

:has_compiler
REM the include and embed paths of a core that carries the compiler genome
set "COREINC=-Isrc/core -Ibuild/core/map --embed-dir=build/core"

REM Handle CLI Arguments if provided
if not "%~1"=="" goto :handle_cli

REM =========================================================================
REM Interactive Main Menu
REM =========================================================================

:main_menu
cls
echo ===============================================================================
echo                          TinyVM - Windows Toolchain
echo ===============================================================================
echo   Compiler : %CC_NAME%
echo   Working  : %CD%
echo -------------------------------------------------------------------------------
echo   executable status:
if exist "build\bin\zy.exe"       ( echo     [X] build\bin\zy.exe       - VM core interpreter ) else ( echo     [ ] build\bin\zy.exe       - not built )
if exist "build\bin\zym.exe"      ( echo     [X] build\bin\zym.exe      - portable microcore ) else ( echo     [ ] build\bin\zym.exe      - not built )
if exist "build\bin\zc0.exe"      ( echo     [X] build\bin\zc0.exe      - stage 0 bootstrap compiler ) else ( echo     [ ] build\bin\zc0.exe      - not built )
if exist "build\bin\mkgenome.exe" ( echo     [X] build\bin\mkgenome.exe - genome image checker ) else ( echo     [ ] build\bin\mkgenome.exe - not built )
if exist "build\bin\genmap.exe"   ( echo     [X] build\bin\genmap.exe   - memory map generator ) else ( echo     [ ] build\bin\genmap.exe   - not built )
if exist "build\bin\zclsp.exe"    ( echo     [X] build\bin\zclsp.exe    - language server protocol ^& highlighter ) else ( echo     [ ] build\bin\zclsp.exe    - not built )
echo ===============================================================================
echo   [1] build VM core (build\bin\zy.exe)
echo   [2] build microcore (build\bin\zym.exe)
echo   [3] build bootstrap tools (zc0.exe, mkgenome.exe, genmap.exe)
echo   [4] build LSP server ^& highlighter (build\bin\zclsp.exe)
echo   [5] build everything
echo   [6] run Windows test suite (native, LSP, JS, bootstrap)
echo   [7] run an example on the native VM (build\bin\zy.exe)
echo   [8] run an example in the JavaScript VM (node build\js\tinyvm.js)
echo   [9] run a custom .zc source file
echo   [L] check/highlight .zc with LSP (build\bin\zclsp.exe)
echo   [R] launch the interactive REPL (resident compiler)
echo   [G] rebuild the compiler genome and check the fixpoint
echo   [C] clean generated output (build)
echo   [Q] quit
echo ===============================================================================
set /p "CHOICE=select an option [1-9, L, R, G, C, Q]: "

if /i "%CHOICE%"=="1" goto :menu_build_core
if /i "%CHOICE%"=="2" goto :menu_build_micro
if /i "%CHOICE%"=="3" goto :menu_build_tools
if /i "%CHOICE%"=="4" goto :menu_build_lsp
if /i "%CHOICE%"=="5" goto :menu_build_all
if /i "%CHOICE%"=="6" goto :menu_test
if /i "%CHOICE%"=="7" goto :menu_examples
if /i "%CHOICE%"=="8" goto :menu_examples_js
if /i "%CHOICE%"=="9" goto :menu_run_custom
if /i "%CHOICE%"=="l" goto :menu_lsp_check
if /i "%CHOICE%"=="r" goto :menu_repl
if /i "%CHOICE%"=="g" goto :menu_genome
if /i "%CHOICE%"=="c" goto :menu_clean
if /i "%CHOICE%"=="q" exit /b 0

echo Invalid choice. Please try again.
timeout /t 2 >nul
goto :main_menu

REM =========================================================================
REM Actions
REM =========================================================================

:menu_build_core
echo.
call :build_core
echo.
pause
goto :main_menu

:menu_build_micro
echo.
call :build_micro
echo.
pause
goto :main_menu

:menu_build_tools
echo.
call :build_tools
echo.
pause
goto :main_menu

:menu_build_lsp
echo.
call :build_lsp
echo.
pause
goto :main_menu

:menu_build_all
echo.
call :build_all
if errorlevel 1 goto :build_failed
echo.
echo [OK] Build complete.
pause
goto :main_menu

:build_failed
echo.
echo [ERROR] Build failed. See the messages above.
pause
goto :main_menu

:menu_test
echo.
call :run_tests
if errorlevel 1 echo [ERROR] Test suite failed.
echo.
pause
goto :main_menu

:menu_genome
echo.
call :build_genome
if errorlevel 1 goto :build_failed
echo.
pause
goto :main_menu

:menu_clean
echo.
call :clean
echo.
pause
goto :main_menu

:menu_run_custom
echo.
set /p "CUSTOM_FILE=Enter path to .zc file (or drag & drop here): "
REM Remove quotes if user dragged & dropped
set "CUSTOM_FILE=%CUSTOM_FILE:"=%"
if not exist "%CUSTOM_FILE%" (
    echo [ERROR] File not found: %CUSTOM_FILE%
    echo.
    pause
    goto :main_menu
)
if not exist "build\bin\zy.exe" (
    call :build_core
    if errorlevel 1 goto :build_failed
)
echo.
echo ===============================================================================
echo Running: %CUSTOM_FILE%
echo ===============================================================================
build\bin\zy.exe < "%CUSTOM_FILE%"
echo.
echo ===============================================================================
pause
goto :main_menu

:menu_lsp_check
echo.
set /p "LSP_FILE=Enter path to .zc file to check/highlight (or drag & drop here): "
set "LSP_FILE=%LSP_FILE:"=%"
if not exist "%LSP_FILE%" (
    echo [ERROR] File not found: %LSP_FILE%
    echo.
    pause
    goto :main_menu
)
if not exist "build\bin\zclsp.exe" (
    call :build_lsp
    if errorlevel 1 goto :build_failed
)
echo.
echo ===============================================================================
echo Analyzing with build\bin\zclsp.exe: %LSP_FILE%
echo ===============================================================================
build\bin\zclsp.exe < "%LSP_FILE%"
echo.
echo ===============================================================================
pause
goto :main_menu

:menu_repl
echo.
if not exist "build\bin\zy.exe" (
    call :build_core
    if errorlevel 1 goto :build_failed
)
echo ===============================================================================
echo TinyVM Interactive REPL (resident compiler)
echo Each input chunk separated by backtick (`) is compiled and run.
echo Type expression or function, terminate with ` (or EOF / Ctrl+Z).
echo Type 'quit;' then backtick or press Ctrl+C to exit.
echo ===============================================================================
(type examples\repl.zc & echo ` & more) | build\bin\zy.exe
echo.
pause
goto :main_menu

REM =========================================================================
REM Example Selection Sub-menu
REM =========================================================================

:menu_examples
cls
echo ===============================================================================
echo                     Run TinyVM Examples on Native VM (zy.exe)
echo ===============================================================================
call :example_list
set /p "EX_CHOICE=Select an example [1-9, B]: "
if /i "%EX_CHOICE%"=="b" goto :main_menu
call :example_file "%EX_CHOICE%"
if "%EX_FILE%"=="" (
    echo Invalid choice.
    timeout /t 2 >nul
    goto :menu_examples
)
if not exist "build\bin\zy.exe" (
    call :build_core
    if errorlevel 1 goto :build_failed
)
echo.
echo ===============================================================================
echo Running: %EX_FILE%
echo ===============================================================================
build\bin\zy.exe < "%EX_FILE%"
echo.
echo ===============================================================================
pause
goto :menu_examples

:menu_examples_js
cls
echo ===============================================================================
echo                 Run TinyVM Examples in JavaScript VM (Node.js)
echo ===============================================================================
call :example_list
set /p "EX_CHOICE=Select an example [1-9, B]: "
if /i "%EX_CHOICE%"=="b" goto :main_menu
call :example_file "%EX_CHOICE%"
if "%EX_FILE%"=="" (
    echo Invalid choice.
    timeout /t 2 >nul
    goto :menu_examples_js
)
call :build_js
if errorlevel 1 goto :build_failed
echo.
echo ===============================================================================
echo Running in JS: %EX_FILE%
echo ===============================================================================
node build\js\tinyvm.js "%EX_FILE%"
echo.
echo ===============================================================================
pause
goto :menu_examples_js

:example_list
echo   [1] hello.zc    - Classic "hello, world!"
echo   [2] fact.zc     - Recursive ^& iterative factorial computation
echo   [3] mandel.zc   - Mandelbrot ASCII set using custom enhancement opcode
echo   [4] primes.zc   - Sieve of Eratosthenes with o3 region compilation
echo   [5] life.zc     - Conway's Game of Life on a typed torus board
echo   [6] lists.zc    - Dynamic array with ownership tracking (u, m, d tags)
echo   [7] typed.zc    - Structs, generic vectors, and reflection
echo   [8] wiring.zc   - Runtime custom enhancement opcodes demo
echo   [9] bf.zc       - Brainfuck compiler running inside TinyVM
echo   [B] Back to main menu
echo ===============================================================================
exit /b 0

:example_file
set "EX_FILE="
if "%~1"=="1" set "EX_FILE=examples\hello.zc"
if "%~1"=="2" set "EX_FILE=examples\fact.zc"
if "%~1"=="3" set "EX_FILE=examples\mandel.zc"
if "%~1"=="4" set "EX_FILE=examples\primes.zc"
if "%~1"=="5" set "EX_FILE=examples\life.zc"
if "%~1"=="6" set "EX_FILE=examples\lists.zc"
if "%~1"=="7" set "EX_FILE=examples\typed.zc"
if "%~1"=="8" set "EX_FILE=examples\wiring.zc"
if "%~1"=="9" set "EX_FILE=examples\bf.zc"
exit /b 0

REM =========================================================================
REM Build Routines
REM =========================================================================

REM genmap needs no map; the default map comes from it and the zc sources' const blocks
:build_tools
if not exist "build\bin" mkdir build\bin
echo Compiling genmap.exe (memory map generator)...
"%CC%" -O2 -w -fwrapv src\tools\genmap.c -o build\bin\genmap.exe
if errorlevel 1 (echo [ERROR] Failed to build build\bin\genmap.exe.& exit /b 1)
if exist build\core\map rmdir /s /q build\core\map
if not exist build\core mkdir build\core
build\bin\genmap.exe --preset default --check -o build\core\map >nul
if errorlevel 1 (echo [ERROR] The default memory map does not match the sources.& exit /b 1)
echo Compiling zc0.exe (bootstrap compiler)...
"%CC%" -O1 -w -fwrapv src\tools\zc0.c -Isrc/core -Ibuild/core/map -o build\bin\zc0.exe
if errorlevel 1 (echo [ERROR] Failed to build build\bin\zc0.exe.& exit /b 1)
echo Compiling mkgenome.exe (genome image checker)...
"%CC%" -O1 -w -fwrapv src\tools\mkgenome.c -Ibuild/core/map -o build\bin\mkgenome.exe
if errorlevel 1 (echo [ERROR] Failed to build build\bin\mkgenome.exe.& exit /b 1)
echo [OK] Bootstrap tools built in build\bin.
exit /b 0

REM zc0 compiles the compiler to g0, g0 compiles it to g1, g1 to g2. g1 and g2
REM must be identical, and g1 becomes build\core\genome.bin.
:build_genome
call :build_tools
if errorlevel 1 exit /b 1
echo Bootstrapping the compiler genome...
if not exist build\s0 mkdir build\s0
if not exist build\s1 mkdir build\s1
(type src\runtime\rt.zc & type src\core\core.zc & for /f %%f in (src\compiler\parts) do @type src\compiler\%%f) | build\bin\zc0.exe > build\s0\g0.bin
if errorlevel 1 (echo [ERROR] Stage 0 failed.& exit /b 1)
build\bin\mkgenome.exe < build\s0\g0.bin > build\s0\genome.bin
if errorlevel 1 (echo [ERROR] Stage 0 did not produce a genome.& exit /b 1)
"%CC%" -O2 -w -fwrapv -DJTYPE=int src\core\core.c src\core\io_win.c -Isrc/core -Ibuild/core/map --embed-dir=build/s0 -o build\s0\zy0.exe
if errorlevel 1 (echo [ERROR] Failed to build the stage 0 core.& exit /b 1)
(type src\tools\build.zc & echo ` & type src\runtime\rt.zc & type src\core\core.zc & for /f %%f in (src\compiler\parts) do @type src\compiler\%%f) | build\s0\zy0.exe > build\s1\g1.bin
build\bin\mkgenome.exe < build\s1\g1.bin > build\s1\genome.bin
if errorlevel 1 (echo [ERROR] The compiler did not compile itself; its diagnostics are above.& exit /b 1)
"%CC%" -O2 -w -fwrapv -DJTYPE=int src\core\core.c src\core\io_win.c -Isrc/core -Ibuild/core/map --embed-dir=build/s1 -o build\s1\zy1.exe
if errorlevel 1 (echo [ERROR] Failed to build the stage 1 core.& exit /b 1)
(type src\tools\build.zc & echo ` & type src\runtime\rt.zc & type src\core\core.zc & for /f %%f in (src\compiler\parts) do @type src\compiler\%%f) | build\s1\zy1.exe > build\s1\g2.bin
fc /b build\s1\g1.bin build\s1\g2.bin >nul
if errorlevel 1 (echo [ERROR] Fixpoint failed: the compiler does not compile itself to the same image.& exit /b 1)
copy /y build\s1\genome.bin build\core\genome.bin >nul
echo [OK] Fixpoint reached; build\core\genome.bin updated.
exit /b 0

:need_genome
if exist build\core\genome.bin if exist build\core\map\memmap.h exit /b 0
call :build_genome
exit /b %errorlevel%

:build_core
call :need_genome
if errorlevel 1 exit /b 1
echo Compiling zy.exe (VM core with the compiler genome)...
"%CC%" -O2 -w -fwrapv -DJTYPE=int src\core\core.c src\core\io_win.c %COREINC% -o build\bin\zy.exe
if errorlevel 1 (echo [ERROR] Failed to build build\bin\zy.exe.& exit /b 1)
echo [OK] build\bin\zy.exe built.
exit /b 0

:build_micro
call :need_genome
if errorlevel 1 exit /b 1
echo Compiling zym.exe (portable microcore)...
"%CC%" -O2 -w -fwrapv src\micro\micro.c src\micro\port_win.c %COREINC% -Isrc/micro -o build\bin\zym.exe
if errorlevel 1 (echo [ERROR] Failed to build build\bin\zym.exe.& exit /b 1)
echo [OK] build\bin\zym.exe built.
exit /b 0

REM the language server: the compiler in check mode plus src\lsp\server.zc, on a
REM map sized to the image (the steps of src/tools/automap.sh lsp with DOCS=1)
:build_lsp
if not exist "build\bin\genmap.exe" (
    call :build_tools
    if errorlevel 1 exit /b 1
)
echo Compiling zclsp.exe (language server ^& semantic highlighter)...
if exist build\lsp rmdir /s /q build\lsp
mkdir build\lsp
call :lsp_pass "" "" image.bin
if errorlevel 1 exit /b 1
call :words build\lsp\image.bin
set /a SLOT=(WORDS+4095)/4096*4096
set /a DOCS_WORK=SLOT+65536
call :lsp_pass %DOCS_WORK% -DZC0DOCS image.bin
if errorlevel 1 exit /b 1
call :words build\lsp\image.bin
set /a DOCS_SLOT=(WORDS+4095)/4096*4096
set "DOCS_WORDS=!WORDS!"
call :lsp_pass %DOCS_SLOT% -DZC0DOCS lsp_genome.bin
if errorlevel 1 exit /b 1
call :words build\lsp\lsp_genome.bin
if not "!WORDS!"=="!DOCS_WORDS!" (echo [ERROR] LSP genome changed length after map sizing.& exit /b 1)
copy /y build\lsp\map\memmap.h build\lsp\memmap.h >nul
"%CC%" -O2 -w -fwrapv -DJTYPE=int -DZY_SANDBOX -DUSE_LSP_GENOME src\core\core.c src\core\io_win.c -Isrc/core -Ibuild/lsp --embed-dir=build/lsp -o build\lsp\zclsp.exe
if errorlevel 1 (echo [ERROR] Failed to build zclsp.exe.& exit /b 1)
if not exist "build\bin" mkdir build\bin
copy /y build\lsp\zclsp.exe build\bin\zclsp.exe >nul
echo [OK] build\bin\zclsp.exe built with !WORDS! words.
exit /b 0

REM :lsp_pass genome-slot zc0-define output - lay out the lsp map (with that genome
REM slot, or the preset's own when it is empty) and compile the server image into it
:lsp_pass
if exist build\lsp\map rmdir /s /q build\lsp\map
if "%~1"=="" (
    build\bin\genmap.exe --preset lsp --grow -o build\lsp\map >nul 2>nul
) else (
    build\bin\genmap.exe --preset lsp --grow --genome %~1 -o build\lsp\map >nul 2>nul
)
if errorlevel 1 (echo [ERROR] Could not generate the LSP map.& exit /b 1)
"%CC%" -O1 -w -fwrapv %~2 src\tools\zc0.c -Ibuild/lsp/map -Isrc/core -o build\lsp\zc0.exe
if errorlevel 1 (echo [ERROR] Could not build the LSP stage 0 compiler.& exit /b 1)
"%CC%" -O1 -w -fwrapv src\tools\mkgenome.c -Ibuild/lsp/map -o build\lsp\mkgenome.exe
if errorlevel 1 (echo [ERROR] Could not build the LSP image checker.& exit /b 1)
(type build\lsp\map\rt.zc & type src\core\core.zc & type build\lsp\map\compiler.zc & type src\lsp\server.zc) | build\lsp\zc0.exe > build\lsp\raw.bin
if errorlevel 1 (echo [ERROR] Could not compile the LSP image.& exit /b 1)
build\lsp\mkgenome.exe < build\lsp\raw.bin > build\lsp\%~3
if errorlevel 1 (echo [ERROR] The LSP image does not match its map.& exit /b 1)
exit /b 0

REM :words file - WORDS is the file's length in 64-bit words
:words
set /a WORDS=%~z1/8
exit /b 0

REM the javascript vm: layout, genome and the compiled vm in build\js (needs node and tsc)
:build_js
call :need_genome
if errorlevel 1 exit /b 1
if not exist build\js mkdir build\js
node src\js\mklayout.js --map build\core\map\memmap.h --out build\js >nul
if errorlevel 1 (echo [ERROR] Could not write the javascript layout.& exit /b 1)
copy /y build\core\genome.bin build\js\genome.bin >nul
call tsc src\js\tinyvm.ts --target es2020 --lib es2020,dom --module commonjs --outDir build\js
if errorlevel 1 (echo [ERROR] Could not compile the javascript vm; tsc is needed.& exit /b 1)
exit /b 0

:build_all
call :build_genome
if errorlevel 1 exit /b 1
call :build_core
if errorlevel 1 exit /b 1
call :build_micro
if errorlevel 1 exit /b 1
call :build_lsp
exit /b %errorlevel%

:run_tests
call :build_core
if errorlevel 1 exit /b 1
call :build_micro
if errorlevel 1 exit /b 1
powershell -NoProfile -ExecutionPolicy Bypass -File "tests\test_win.ps1"
exit /b %errorlevel%

:clean
rmdir /s /q build 2>nul
echo [OK] Generated build directory removed.
exit /b 0

REM =========================================================================
REM CLI Command Handler
REM =========================================================================

:handle_cli
set "CMD=%~1"
set "ARG2=%~2"

if /i "%CMD%"=="build" (
    if "%ARG2%"=="" ( call :build_all & exit /b !errorlevel! )
    if /i "%ARG2%"=="all" ( call :build_all & exit /b !errorlevel! )
    if /i "%ARG2%"=="core" ( call :build_core & exit /b !errorlevel! )
    if /i "%ARG2%"=="micro" ( call :build_micro & exit /b !errorlevel! )
    if /i "%ARG2%"=="tools" ( call :build_tools & exit /b !errorlevel! )
    if /i "%ARG2%"=="lsp" ( call :build_lsp & exit /b !errorlevel! )
    if /i "%ARG2%"=="js" ( call :build_js & exit /b !errorlevel! )
    echo Unknown build target: %ARG2%
    exit /b 1
)

if /i "%CMD%"=="genome" (
    call :build_genome
    exit /b !errorlevel!
)

if /i "%CMD%"=="test" (
    call :run_tests
    exit /b !errorlevel!
)

if /i "%CMD%"=="run" (
    if "%ARG2%"=="" (
        echo Error: Missing .zc file to run.
        echo Usage: tinyvm.bat run path\to\program.zc
        exit /b 1
    )
    if not exist "build\bin\zy.exe" (
        call :build_core
        if errorlevel 1 exit /b 1
    )
    build\bin\zy.exe < "%SOURCE_ARG%"
    exit /b !errorlevel!
)

if /i "%CMD%"=="run-micro" (
    if "%ARG2%"=="" (
        echo Error: Missing .zc file to run.
        echo Usage: tinyvm.bat run-micro path\to\program.zc
        exit /b 1
    )
    if not exist "build\bin\zym.exe" (
        call :build_micro
        if errorlevel 1 exit /b 1
    )
    build\bin\zym.exe < "%SOURCE_ARG%"
    exit /b !errorlevel!
)

if /i "%CMD%"=="js" (
    if "%ARG2%"=="" (
        echo Error: Missing .zc file to run.
        echo Usage: tinyvm.bat js path\to\program.zc
        exit /b 1
    )
    call :build_js
    if errorlevel 1 exit /b 1
    node build\js\tinyvm.js "%SOURCE_ARG%"
    exit /b !errorlevel!
)

if /i "%CMD%"=="lsp" (
    if "%ARG2%"=="" (
        echo Error: Missing .zc file to check.
        echo Usage: tinyvm.bat lsp path\to\program.zc
        exit /b 1
    )
    if not exist "build\bin\zclsp.exe" (
        call :build_lsp
        if errorlevel 1 exit /b 1
    )
    build\bin\zclsp.exe < "%SOURCE_ARG%"
    exit /b !errorlevel!
)

if /i "%CMD%"=="repl" (
    if not exist "build\bin\zy.exe" (
        call :build_core
        if errorlevel 1 exit /b 1
    )
    (type examples\repl.zc & echo ` & more) | build\bin\zy.exe
    exit /b !errorlevel!
)

if /i "%CMD%"=="clean" (
    call :clean
    exit /b 0
)

echo Unknown command: %CMD%
echo.
exit /b 1
:show_help
echo usage: tinyvm.bat [command]
echo   tinyvm.bat                     launch interactive build ^& run menu
echo   tinyvm.bat build [all^|core^|micro^|tools^|lsp^|js]
echo                                  compile TinyVM executables into build\bin
echo   tinyvm.bat genome              rebuild build\core\genome.bin and check the fixpoint
echo   tinyvm.bat run ^<file.zc^>       run a .zc program on VM core (zy.exe)
echo   tinyvm.bat run-micro ^<file.zc^> run a .zc program on microcore (zym.exe)
echo   tinyvm.bat js ^<file.zc^>        run a .zc program on the JavaScript VM (node)
echo   tinyvm.bat lsp ^<file.zc^>       check/highlight a .zc program with zclsp.exe
echo   tinyvm.bat test                run the Windows test suite
echo   tinyvm.bat repl                launch the resident compiler REPL
echo   tinyvm.bat clean               remove the generated build directory
echo the compiler must support c23 #embed: clang 19 or gcc 15 and later.
exit /b 0