#!/bin/sh
# rclaude <host> [dir]
#
# Remote, durable Claude Code session. Two layers of resilience stacked:
#
#   1. tmux on <host> survives transport drops (network, lid close, ssh kill)
#   2. `claude --continue` resumes the per-directory session from disk after
#      anything kills the host itself (reboot, crash, OOM)
#
# Re-running with the same <host> + <dir> always lands you back where you
# were: tmux reattaches if alive, claude --continue picks up the conversation
# from ~/.claude/projects/<encoded-cwd>/ otherwise.
#
# Permission mode: --dangerously-skip-permissions is on by default — these
# are remote sessions on hosts you own. Override with RCLAUDE_PERMS=default
# (or any other --permission-mode value) if you want prompts back.
#
# Usage:
#   rclaude apricot                          # remote home dir
#   rclaude apricot ~/Code/@projects/foo     # specific dir
#   rclaude apricot @proj/lilith             # alias from project-paths.md
#                                            # works if remote shell expands it

set -eu

if [ $# -lt 1 ]; then
    echo "usage: $0 <host> [dir]   (dir defaults to remote \$HOME)" >&2
    exit 2
fi

host=$1
dir=${2:-\~}

# tmux session name unique per (user, dir) so multiple Claude sessions on the
# same host don't collide. Slug is the path with non-alnum collapsed.
slug=$(printf %s "$dir" | sed -e 's|^[~/]*||' -e 's|[^A-Za-z0-9]|-|g')
[ -z "$slug" ] && slug=home
session="claude-$(whoami)-${slug}"

perms=${RCLAUDE_PERMS:-bypass}
case $perms in
    bypass) flag="--dangerously-skip-permissions" ;;
    *)      flag="--permission-mode $perms" ;;
esac

# cd then exec claude. exec replaces the shell so the tmux pane dies cleanly
# when claude exits (instead of leaving a stray shell behind).
inner="cd ${dir} && exec claude --continue ${flag}"

exec ssh -t "$host" "tmux new-session -A -s '${session}' \"${inner}\""