#!/bin/sh
# hey-shell one-line installer, served at https://hey-shell.com/install
#
#   curl -fsSL https://hey-shell.com/install | bash
#
# Clones the newest release of hey-shell (its highest vX.Y.Z tag, not whatever is on main) into ~/hey-shell, or
# moves an existing install to it, then runs its installer, which asks for your key and aliases. Installer
# flags go after `bash -s --`:
#
#   curl -fsSL https://hey-shell.com/install | bash -s -- --key alt+o --aliases --agent codex
#
# Env: HEY_SHELL_DIR (default: ~/hey-shell), HEY_SHELL_REPO (default: the GitHub repository; the tests use it),
#      HEY_SHELL_REF (default: the newest release tag; a branch such as main installs the development version).
# Everything runs inside main, called on the last line, so a download cut short runs nothing.

main() {
  set -eu
  dir="${HEY_SHELL_DIR:-$HOME/hey-shell}"
  repo="${HEY_SHELL_REPO:-https://github.com/alparslanpolat/hey-shell}"

  command -v git >/dev/null 2>&1 || { echo "hey-shell: git is needed to install hey-shell; install git first" >&2; exit 1; }

  # the newest release: the highest vX.Y.Z tag, compared as numbers
  ref="${HEY_SHELL_REF:-$(git ls-remote --tags --refs "$repo" 'v*' | sed 's|.*refs/tags/||' \
    | grep -E '^v[0-9]+\.[0-9]+\.[0-9]+$' | sort -t. -k1.2,1n -k2,2n -k3,3n | tail -1)}"
  [ -n "$ref" ] || { echo "hey-shell: could not find a release of $repo" >&2; exit 1; }

  if [ -d "$dir/.git" ]; then
    # only ever run an installer from a checkout of this repository
    origin="$(git -C "$dir" remote get-url origin 2>/dev/null || true)"
    if [ "${origin%.git}" != "${repo%.git}" ]; then
      echo "hey-shell: $dir is a git checkout of '${origin:-no remote}', not $repo; move it, or set HEY_SHELL_DIR" >&2
      exit 1
    fi
    echo "Updating hey-shell in $dir to $ref"
    git -C "$dir" fetch --quiet --depth 1 origin "refs/tags/$ref:refs/tags/$ref" 2>/dev/null \
      || git -C "$dir" fetch --quiet origin "$ref"
    git -C "$dir" -c advice.detachedHead=false checkout --quiet "$ref" 2>/dev/null \
      || git -C "$dir" -c advice.detachedHead=false checkout --quiet FETCH_HEAD
  elif [ -e "$dir" ]; then
    echo "hey-shell: $dir already exists and is not a hey-shell checkout; move it, or set HEY_SHELL_DIR" >&2
    exit 1
  else
    echo "Downloading hey-shell $ref into $dir"
    git -c advice.detachedHead=false clone --quiet --depth 1 --branch "$ref" "$repo" "$dir"
  fi

  # With `curl | bash` this script arrives on stdin, so give the installer the terminal for its questions
  if [ -r /dev/tty ] && (: </dev/tty) 2>/dev/null; then
    "$dir/install.sh" "$@" </dev/tty
  else
    "$dir/install.sh" "$@"
  fi
  echo "Done. Open a new terminal, type a request and press your key."
}

main "$@"