#!/usr/bin/env bash
# Rebuild nix-darwin + home-manager. Rotates stale home-manager *.backup files
# so a second switch never fails with "would be clobbered".
set -euo pipefail
DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd -P)"
ln -sfn "$DIR" ~/.dotfiles

stamp="$(date +%Y%m%d-%H%M%S)"
# Paths home-manager manages via home.file (regular files become out-of-store symlinks).
managed=(
  "$HOME/.grok/config.toml"
  "$HOME/.grok/AGENTS.md"
  "$HOME/.claude/settings.json"
  "$HOME/.claude/CLAUDE.md"
  "$HOME/.codex/AGENTS.md"
  "$HOME/.config/opencode/AGENTS.md"
  "$HOME/.pi/agent/settings.json"
  "$HOME/.pi/agent/models.json"
  "$HOME/.pi/agent/AGENTS.md"
  "$HOME/.pi/agent/extensions/terminal-status-title.js"
)
for path in "${managed[@]}"; do
  bak="${path}.backup"
  if [ -e "$bak" ] || [ -L "$bak" ]; then
    mv "$bak" "${bak}.${stamp}"
    echo "rotated stale backup: ${bak} -> ${bak}.${stamp}"
  fi
done
# Directory targets use the same backup suffix on collision.
for path in \
  "$HOME/.config/wezterm" \
  "$HOME/.config/nvim" \
  "$HOME/.config/herdr" \
  "$HOME/.pi/agent/themes" \
  "$HOME/.pi/agent/extensions/calm"
do
  bak="${path}.backup"
  if [ -e "$bak" ] || [ -L "$bak" ]; then
    mv "$bak" "${bak}.${stamp}"
    echo "rotated stale backup: ${bak} -> ${bak}.${stamp}"
  fi
done

exec sudo darwin-rebuild switch --flake ~/.dotfiles#lt-mbp