#!/usr/bin/env bash
# Set up ESPHome dev environment

set -e

cd "$(dirname "$0")/.."
if [ -n "$VIRTUAL_ENV" ]; then
  # A virtual environment is already active (e.g. the devcontainer's pre-provisioned
  # esphome-venv). Install into it rather than creating a ./venv in the workspace.
  venv_state=active
elif [ -x venv/bin/python ]; then
  # Reuse the environment from an earlier run, so this script can be run again
  # at any time to pick up dependency changes.
  venv_state=reused
  source venv/bin/activate
else
  venv_state=created
  # --clear replaces a partial environment left behind by an interrupted run.
  if [ -x "$(command -v uv)" ]; then
    uv venv --clear --seed venv
  else
    python3 -m venv --clear venv
  fi
  source venv/bin/activate
fi

if ! [ -x "$(command -v uv)" ]; then
  python3 -m pip install uv
fi

uv pip install setuptools wheel
uv pip install -e ".[dev,test]" --config-settings editable_mode=compat

# A worktree shares one git hooks directory with the main checkout it was
# created from, so hooks are installed from the main checkout only. Installing
# from a worktree would point the shared hook at that worktree's virtual
# environment, breaking it for everyone once the worktree is removed.
git_dir="$(git rev-parse --absolute-git-dir 2>/dev/null || true)"
common_dir="$(git rev-parse --path-format=absolute --git-common-dir 2>/dev/null || true)"
if [ -n "$common_dir" ] && [ "$git_dir" = "$common_dir" ]; then
  # --overwrite replaces any hook already in place. Without it, prek finds a
  # previously installed pre-commit hook, moves it aside to
  # .git/hooks/pre-commit.legacy and keeps calling it, so every commit would
  # run both tools.
  prek install --overwrite

  # Prepares the virtual environment for new checkouts and worktrees. Installed
  # once here, it covers every worktree created from this checkout.
  if [ -d "$common_dir/hooks" ]; then
    cp script/git-hooks/post-checkout "$common_dir/hooks/post-checkout"
    chmod +x "$common_dir/hooks/post-checkout"
  fi
fi

mkdir -p .temp

echo
echo
case "$venv_state" in
  created)
    echo "Virtual environment created at ./venv. Run 'source venv/bin/activate' to use it."
    ;;
  reused)
    echo "Dependencies updated in the existing ./venv. Run 'source venv/bin/activate' to use it."
    ;;
  active)
    echo "Dependencies installed into the active virtual environment:"
    echo "  $VIRTUAL_ENV"
    echo "It is already active in this shell, so no 'source venv/bin/activate' is needed."
    ;;
esac