#!/bin/bash

# omarchy:summary=Point Omarchy at a local checkout for live editing
# omarchy:group=dev
# omarchy:args=<path-to-checkout>
# omarchy:examples=omarchy dev link ~/Work/omarchy/omarchy-installer

set -euo pipefail

# Sudo wipes HYPRLAND_INSTANCE_SIGNATURE, so the live-session refresh below
# can't reach hyprctl. Run as user; we sudo internally for the conf write.
if [[ $EUID -eq 0 ]]; then
  echo "Error: run omarchy-dev-link as your user, not under sudo." >&2
  exit 1
fi

if [[ $# -ne 1 || $1 == "-h" || $1 == "--help" ]]; then
  cat <<USAGE
Usage: omarchy dev link <path-to-checkout>

Writes /etc/omarchy.conf so OMARCHY_PATH resolves to <path-to-checkout>
in all new shells, the Hyprland session, and Quickshell. Restarts
omarchy-shell and reloads hyprctl so changes take effect immediately.

Affects only \$OMARCHY_PATH-resolved trees: bin/, default/, shell/,
themes/, applications/, config/. Files installed at fixed system paths
(/etc/, /usr/lib/systemd/, udev rule bodies, /etc/skel after user
creation, /usr/share/plymouth) are NOT covered — for those, use
omarchy-dev-pkg-test to build and install the package from the checkout.
USAGE
  exit 0
fi

target=$(realpath -e "$1" 2>/dev/null) || {
  echo "Error: path does not exist: $1" >&2
  exit 1
}

for required in bin default shell; do
  if [[ ! -d "$target/$required" ]]; then
    echo "Warning: $target/$required not found — does this look like an omarchy-installer checkout?" >&2
  fi
done

# Strip any previous dev-link's bin/ from PATH before adding the new one,
# so repeated link calls don't accumulate stale entries.
prior_target=""
if [[ -f /etc/omarchy.conf ]]; then
  prior_target=$(sed -n 's/^[[:space:]]*export[[:space:]]\+OMARCHY_PATH="\?\([^"]*\)"\?/\1/p' /etc/omarchy.conf | tail -1)
fi

echo "Pointing Omarchy at $target"
printf 'export OMARCHY_PATH="%s"\n' "$target" | sudo tee /etc/omarchy.conf >/dev/null

export OMARCHY_PATH="$target"
if [[ -n $prior_target && $prior_target != "$target" ]]; then
  PATH=$(printf '%s' "$PATH" | tr ':' '\n' | grep -vFx "$prior_target/bin" | paste -sd:)
fi
export PATH="$target/bin:$PATH"

if command -v hyprctl >/dev/null 2>&1 && hyprctl version &>/dev/null; then
  hyprctl setenv OMARCHY_PATH "$target" >/dev/null
  hyprctl setenv PATH "$PATH" >/dev/null
  echo "  Updated Hyprland session env."

  systemctl --user import-environment OMARCHY_PATH PATH 2>/dev/null || true
  echo "  Updated systemd --user env."

  if pgrep -x quickshell >/dev/null 2>&1; then
    omarchy-restart-shell
    echo "  Restarted omarchy-shell."
  fi

  hyprctl reload >/dev/null
  echo "  Reloaded Hyprland config."
fi

echo
echo "Done. Open a new shell (or restart existing ones) to pick up the new"
echo "OMARCHY_PATH. Run 'omarchy dev unlink' to restore the package install."