@echo off
setlocal enabledelayedexpansion
title E-Reader App Launcher

echo ================================================
echo  E-Reader App - Launcher
echo ================================================
echo.

:: Set directories using absolute paths (avoiding issues with current dir)
set "BASE_DIR=%~dp0"
set "APP_DIR=%BASE_DIR%App"
set "BACKEND_DIR=%APP_DIR%\backend"
set "FRONTEND_DIR=%APP_DIR%\frontend"

:: Resolve Python and Uvicorn
set "UVICORN_EXE=%BACKEND_DIR%\venv\Scripts\uvicorn.exe"
set "PIP_EXE=%BACKEND_DIR%\venv\Scripts\pip.exe"

:: 1. Sanity Checks
if not exist "%APP_DIR%" (
    echo [ERROR] App folder not found at: %APP_DIR%
    pause
    exit /b 1
)

:: 2. Check/Install Backend
if not exist "%UVICORN_EXE%" (
    echo [INFO] Backend venv not found. Attempting to create it...
    cd /d "%BACKEND_DIR%"
    python -m venv venv
    if !errorlevel! neq 0 (
        echo [ERROR] Failed to create venv. Please install Python and ensure it's in your PATH.
        pause
        exit /b 1
    )
    echo [INFO] Installing backend dependencies...
    "%PIP_EXE%" install -r requirements.txt
)

:: 3. Check/Install Frontend
if not exist "%FRONTEND_DIR%\node_modules" (
    echo [INFO] node_modules not found. Installing frontend dependencies...
    cd /d "%FRONTEND_DIR%"
    call npm install
    if !errorlevel! neq 0 (
        echo [ERROR] Failed to install frontend dependencies. Please install Node.js/npm.
        pause
        exit /b 1
    )
)

echo.
echo [1/2] Starting Backend (Port 8000)...
start "Backend (FastAPI)" /D "%BACKEND_DIR%" cmd /k ""%UVICORN_EXE%" main:app --host 127.0.0.1 --port 8000"

timeout /t 2 /nobreak >nul

echo [2/2] Starting Frontend (Dev mode)...
:: Using /D to set the starting directory correctly
start "Frontend (Vite)" /D "%FRONTEND_DIR%" cmd /k "npm run dev"

echo.
echo Waiting for servers to spin up...
timeout /t 5 /nobreak >nul

echo.
echo ================================================
echo  Ready! Visit: http://localhost:5173
echo ================================================
echo.
pause