#!/usr/bin/env bash
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
DEFAULT_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"
PROJECT_ROOT="${PROJECT_ROOT:-${DEFAULT_ROOT}}"
PYTHON_BIN="${PYTHON_BIN:-python3}"

if ! command -v "${PYTHON_BIN}" >/dev/null 2>&1; then
  echo "Python executable not found: ${PYTHON_BIN}" >&2
  exit 1
fi

cd "${PROJECT_ROOT}"

"${PYTHON_BIN}" -m venv .venv
source .venv/bin/activate
pip install --upgrade pip
pip install -r backend/requirements.txt

echo "Virtualenv ready at ${PROJECT_ROOT}/.venv"