#!/bin/sh
set -e
here=$(cd "$(dirname "$0")" && pwd)
bindir="${RELAY2_PREFIX:-$HOME/bin}"
root="${RELAY2_ROOT:-$HOME/.relay2}"
venv="$root/venv"
python="${RELAY2_PYTHON:-python3}"

if [ "${1:-}" = "--uninstall" ]; then
  rm -f "$bindir/relay2"
  rm -rf "$venv"
  echo "removed $bindir/relay2 and $venv"
  echo "your messages were left alone. Remove them yourself if you want them gone:"
  echo "  $root"
  exit 0
fi

if ! command -v "$python" >/dev/null 2>&1; then
  echo "$python not found. Install Python 3.9 or newer first." >&2
  exit 1
fi

if ! "$python" -c 'import sys; sys.exit(0 if sys.version_info >= (3, 9) else 1)'; then
  echo "relay2 needs Python 3.9 or newer; $python is $("$python" -V 2>&1)." >&2
  exit 1
fi

echo "creating a private Python environment in $venv"
"$python" -m venv "$venv"
"$venv/bin/python" -m pip install --quiet --disable-pip-version-check pyyaml

chmod +x "$here/relay2"
mkdir -p "$bindir"
rm -f "$bindir/relay2"
printf '#!/bin/sh\nexec "%s" "%s" "$@"\n' "$venv/bin/python" "$here/relay2" > "$bindir/relay2"
chmod 755 "$bindir/relay2"

echo "installed:"
echo "  $bindir/relay2, which runs $here/relay2 with $venv/bin/python"
echo "  data root $root"
echo ""
echo "The launcher points back into this directory, so keep it where it is."

case ":$PATH:" in
  *":$bindir:"*) ;;
  *) echo ""
     echo "NOTE: $bindir is not on PATH. Add to your shell startup file:"
     echo "  export PATH=\"$bindir:\$PATH\"" ;;
esac

echo ""
echo "next:"
echo "  export RELAY_ROLE=<your name>"
echo "  relay2 send --to someone --subject hello --body 'first message'"
echo "  relay2 watch --once"
echo "  relay2 inbox"