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

REPO_DIR="${REPO_DIR:-/nfs/ywang29/GmNet/journal_exp}"
VENV_DIR="${VENV_DIR:-/tmp/gmnet_venv}"
PYTHON_BASE="${PYTHON_BASE:-python3}"
INSTALL_DEV="${INSTALL_DEV:-0}"
UPGRADE_PACKAGING_TOOLS="${UPGRADE_PACKAGING_TOOLS:-0}"

if [[ "${VENV_DIR}" != /tmp && "${VENV_DIR}" != /tmp/* ]]; then
  echo "VENV_DIR must be under /tmp so setup cannot modify the global environment" >&2
  exit 2
fi
if [[ ! -f "${REPO_DIR}/pyproject.toml" ]]; then
  echo "GmNet journal repository not found at ${REPO_DIR}" >&2
  exit 1
fi
if ! command -v "${PYTHON_BASE}" >/dev/null 2>&1; then
  echo "Python executable not found: ${PYTHON_BASE}" >&2
  exit 1
fi

if [[ ! -x "${VENV_DIR}/bin/python" ]]; then
  "${PYTHON_BASE}" -m venv --system-site-packages "${VENV_DIR}"
fi

PYTHON="${VENV_DIR}/bin/python"
export PIP_DISABLE_PIP_VERSION_CHECK=1
if [[ "${UPGRADE_PACKAGING_TOOLS}" == 1 ]]; then
  "${PYTHON}" -m pip install --upgrade pip setuptools wheel
fi
"${PYTHON}" -m pip install -r "${REPO_DIR}/requirements-runtime.txt"
if [[ "${INSTALL_DEV}" == 1 ]]; then
  "${PYTHON}" -m pip install -r "${REPO_DIR}/requirements-dev.txt"
fi
"${PYTHON}" -m pip install --no-build-isolation --editable "${REPO_DIR}"
"${PYTHON}" "${REPO_DIR}/scripts/check_env.py" --strict-versions

echo "Isolated GmNet environment is ready: ${VENV_DIR}"
echo "Use ${PYTHON} or export VENV_DIR=${VENV_DIR} when running scripts."