@echo off
setlocal EnableExtensions DisableDelayedExpansion

for %%I in ("%~dp0..") do set "REPO_ROOT=%%~fI"
title SystemSimulationApp FastAPI - 127.0.0.1:8000

set "PYTHON_EXE=%REPO_ROOT%\.venv-win\Scripts\python.exe"
if not defined SIMULATION_NUMERIC_ENGINE set "SIMULATION_NUMERIC_ENGINE=native"

if not exist "%PYTHON_EXE%" (
  echo [ERROR] Python virtual environment was not found:
  echo         %PYTHON_EXE%
  echo.
  echo Create it and install the backend dependencies first:
  echo         py -3 -m venv "%REPO_ROOT%\.venv-win"
  echo         "%PYTHON_EXE%" -m pip install -r "%REPO_ROOT%\requirements.txt"
  echo.
  pause
  exit /b 1
)

pushd "%REPO_ROOT%" >nul
if errorlevel 1 (
  echo [ERROR] Unable to enter the repository directory:
  echo         %REPO_ROOT%
  echo.
  pause
  exit /b 1
)

echo Starting FastAPI at http://127.0.0.1:8000
echo Press Ctrl+C to stop the service.
echo.

"%PYTHON_EXE%" -m uvicorn app.main:app --host 127.0.0.1 --port 8000
set "EXIT_CODE=%ERRORLEVEL%"

if not "%EXIT_CODE%"=="0" (
  echo.
  echo [ERROR] FastAPI exited with code %EXIT_CODE%.
  pause
)

popd
exit /b %EXIT_CODE%