#!/bin/sh
# dmux: a simple terminal session switcher on top of dtach and fzf
# Created by Luxferre in 2026, released into the public domain

SDIR="$HOME/.dtsess"
SPFILE="$SDIR/.list"
mkdir -p "$SDIR"
touch "$SPFILE"
if [ -z "$(ls -1 "$SDIR")" ]; then
  cat "$SPFILE" | while read -r sess; do
    dtach -n "$SDIR/$sess" $SHELL
  done
fi
FTR='Select a session or create a new one'
while true; do
  ls -1 "$SDIR" > "$SPFILE"
  slist="$(nl -nln -w1 -s' - ' "$SPFILE")"
  sname="$(printf '%s\nNew\nQuit\n' "$slist" | grep . | fzf --tac --footer="$FTR")"
  [ "$sname" = 'Quit' ] && break
  [ "$sname" = 'New' ] && read -r -p 'New session name: ' sname
  sname="$(echo "$sname" | sed -E 's/^[0-9]+\ -\ //')"
  [ -n "$sname" ] && printf '\033[0m' && dtach -A "$SDIR/$sname" $SHELL
done