set -euo pipefail

ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

cd "${ROOT_DIR}"

MIN_PYTHON="3.10"

MIN_NODE_MAJOR=18

info() {

echo "✅ $1"

}

warn() {

echo "⚠️ $1"

}

fail() {

echo "❌ $1"

exit 1

}

version_ge() {

# usage: version_ge "actual" "minimum"

[ "$(printf '%s\n' "$2" "$1" | sort -V | head -n1)" = "$2" ]

}

echo "🎯 Quart + React Demo - Automated Setup"

echo "========================================"

echo ""

[ -f "backend/requirements.txt" ] || fail "Run this script from the repository root."

[ -f "frontend/package.json" ] || fail "Missing frontend/package.json. Repository checkout looks incomplete."

echo "📝 Checking Python installation..."

if ! command -v python3 >/dev/null 2>&1; then

fail "Python 3 is not installed.

PYTHON_VERSION="$(python3 --version | awk '{print $2}')"

if ! version_ge "${PYTHON_VERSION}" "${MIN_PYTHON}"; then

fail "Python ${MIN_PYTHON}+ required, found ${PYTHON_VERSION}."

info "Found Python ${PYTHON_VERSION}"

echo "📝 Checking Node.js installation..."

if ! command -v node >/dev/null 2>&1; then

fail "Node.js is not installed.

NODE_VERSION="$(node --version)"

NODE_MAJOR="$(echo "${NODE_VERSION}" | sed 's/^v//' | cut -d'.' -f1)"

if [ "${NODE_MAJOR}" -lt "${MIN_NODE_MAJOR}" ]; then

fail "Node.js ${MIN_NODE_MAJOR}+ required, found ${NODE_VERSION}."

info "Found Node.js ${NODE_VERSION}"

echo ""

echo "🐍 Setting up Python backend..."

if [ -d ".venv" ]; then

VENV_PY=".venv/bin/python"

if [ -x "${VENV_PY}" ] && "${VENV_PY}" -c "import sys; print(sys.version)" >/dev/null 2>&1; then

warn "Virtual environment already exists at .venv, reusing it."

else

warn "Existing .venv is incompatible with this OS/Python. Recreating it."

rm -rf .venv

echo "Creating virtual environment at .venv..."

python3 -m venv .venv

fi

echo "Creating virtual environment at .venv..."

python3 -m venv .venv

VENV_PY=".venv/bin/python"

if [ ! -x "${VENV_PY}" ]; then

fail "Virtual environment Python not found at ${VENV_PY} after creation."

echo "Installing Python dependencies..."

"${VENV_PY}" -m pip install --upgrade pip

"${VENV_PY}" -m pip install -r backend/requirements.txt

info "Backend setup complete"

echo ""

echo "⚛️ Setting up React frontend..."

cd frontend

echo "Installing frontend npm dependencies..."

npm install

info "Frontend setup complete"

cd ..

echo ""

echo "🎭 Setting up Playwright..."

if [ -f "package-lock.json" ]; then

npm ci

npm install

if [ "$(uname -s)" = "Linux" ] && command -v apt-get >/dev/null 2>&1 && [ "$(id -u)" -eq 0 ]; then

echo "Installing Playwright browser + Linux dependencies (root detected)..."

npx playwright install --with-deps chromium

npx playwright install chromium

if [ "$(uname -s)" = "Linux" ]; then

warn "On Linux, browser runtime deps may still be missing. If tests fail, run: npx playwright install --with-deps chromium"

fi

echo ""

info "Setup complete"

echo ""

echo "� Next steps:"

echo ""

echo "Option 1 - Start the web app:"

echo " ./start-dev.sh"

echo ""

echo "Option 2 - Run manually in separate terminals:"

echo " Terminal 1: source .venv/bin/activate && cd backend && python app.py"

echo " Terminal 2: cd frontend && npm run dev"

echo ""

echo "Then open:"

echo " http://localhost:3001/usecase_demo_1"

echo ""