@echo off
setlocal enabledelayedexpansion

:: =========================================================================
:: test.bat -- Build and run all host-side tests (no Arduino board needed)
::
:: Usage:
::   test              Build and run all tests
::   test --clean      Clean rebuild
::   test --verbose    Verbose test output
::   test --unit       Run only unit tests
::   test --system     Run only system tests
::
:: This script builds your application against mock_arduino (a fake Arduino
:: environment) and runs Google Test suites. Your app code compiles and runs
:: on your PC -- no board, no wires, no USB.
::
:: Prerequisites:
::   cmake >= 3.14, a C++ compiler (g++, clang++, or MSVC), git
::
:: First run downloads Google Test automatically (~30 seconds).
:: =========================================================================

set "SCRIPT_DIR=%~dp0"
:: %~dp0 always ends with \ which breaks cmake quoting
set "SCRIPT_DIR=%SCRIPT_DIR:~0,-1%"
set "TEST_DIR=%SCRIPT_DIR%\test"
set "BUILD_DIR=%TEST_DIR%\build"

set DO_CLEAN=0
set VERBOSE=
set FILTER=

:parse_args
if "%1"=="" goto :done_args
if "%1"=="--clean"   ( set DO_CLEAN=1 & shift & goto :parse_args )
if "%1"=="--verbose" ( set VERBOSE=--verbose & shift & goto :parse_args )
if "%1"=="--unit"    ( set "FILTER=-R test_unit" & shift & goto :parse_args )
if "%1"=="--system"  ( set "FILTER=-R test_system" & shift & goto :parse_args )
if "%1"=="--help"    goto :show_help
if "%1"=="-h"        goto :show_help
echo [FAIL] Unknown option: %1
echo   Try: test --help
exit /b 1
:done_args

:: -- Check prerequisites ---------------------------------------------------

where cmake >nul 2>&1
if errorlevel 1 (
    echo [FAIL] cmake not found.
    echo   Install: winget install Kitware.CMake
    echo   Or run:  anvil doctor --fix
    exit /b 1
)

set "HAS_COMPILER=0"
where g++ >nul 2>&1 && set "HAS_COMPILER=1"
where clang++ >nul 2>&1 && set "HAS_COMPILER=1"
where cl >nul 2>&1 && set "HAS_COMPILER=1"
if "%HAS_COMPILER%"=="1" goto :compiler_ok

:: cl.exe not on PATH -- try to find VS Build Tools via vswhere
set "VSWHERE=%ProgramFiles(x86)%\Microsoft Visual Studio\Installer\vswhere.exe"
if not exist "%VSWHERE%" goto :no_compiler

for /f "usebackq tokens=*" %%i in (`"%VSWHERE%" -latest -property installationPath`) do (
    set "VS_PATH=%%i"
)
if not defined VS_PATH goto :no_compiler

set "VCVARS=!VS_PATH!\VC\Auxiliary\Build\vcvarsall.bat"
if not exist "!VCVARS!" goto :no_compiler

echo [TEST] Setting up MSVC environment...
call "!VCVARS!" x64 >nul 2>&1
where cl >nul 2>&1
if errorlevel 1 goto :no_compiler
set "HAS_COMPILER=1"
goto :compiler_ok

:no_compiler
echo [FAIL] No C++ compiler found.
echo.
echo   Easiest fix -- install MinGW g++ ^(just works, lands on PATH^):
echo     choco install mingw -y
echo.
echo   Or if you have VS Build Tools, open "Developer Command Prompt"
echo   and run test.bat from there.
echo.
echo   Or run: anvil doctor --fix
exit /b 1

:compiler_ok

where git >nul 2>&1
if errorlevel 1 (
    echo [FAIL] git not found ^(needed to fetch Google Test^).
    echo   Install: winget install Git.Git
    exit /b 1
)

:: -- Build ------------------------------------------------------------------

if %DO_CLEAN%==1 (
    if exist "%BUILD_DIR%" (
        echo [TEST] Cleaning build directory...
        rmdir /s /q "%BUILD_DIR%"
    )
)

if not exist "%BUILD_DIR%\CMakeCache.txt" (
    echo [TEST] Configuring test build. First run will fetch Google Test...
    cmake -S "%TEST_DIR%" -B "%BUILD_DIR%"
    if errorlevel 1 (
        echo [FAIL] cmake configure failed.
        echo   Run 'anvil doctor' to check your environment.
        exit /b 1
    )
    echo.
)

echo [TEST] Building tests...
cmake --build "%BUILD_DIR%" --parallel
if errorlevel 1 (
    echo [FAIL] Build failed.
    exit /b 1
)

echo.
echo [TEST] Running tests...
echo.

:: -- Run --------------------------------------------------------------------

set "CTEST_ARGS=--test-dir "%BUILD_DIR%" --output-on-failure"
if not "%VERBOSE%"=="" set "CTEST_ARGS=%CTEST_ARGS% %VERBOSE%"
if not "%FILTER%"=="" set "CTEST_ARGS=%CTEST_ARGS% %FILTER%"

ctest %CTEST_ARGS%
if errorlevel 1 (
    echo.
    echo [FAIL] Some tests failed.
    exit /b 1
)

echo.
echo [PASS] All tests passed.
exit /b 0

:show_help
echo Usage: test [--clean] [--verbose] [--unit^|--system]
echo.
echo   --clean      Delete build cache and rebuild from scratch
echo   --verbose    Show individual test names and output
echo   --unit       Run only unit tests (Google Mock)
echo   --system     Run only system tests (SimHal)
exit /b 0