#!/usr/bin/env bash

export LC_CTYPE=zh_CN.UTF-8

# Number of current visible frames,                                              
# Emacs daemon always has a visible frame called F1                              
visible_frames() {                                                               
  emacsclient -a "" -e '(length (visible-frame-list))'                           
}                                                                                

change_focus() {                                                                 
  emacsclient -n -e "(select-frame-set-input-focus (selected-frame))" > /dev/null
}                                                                                

# try switching to the frame incase it is just minimized                         
# will start a server if not running                                             
test "$(visible_frames)" -eq "1" && change_focus                                 

if [ "$(visible_frames)" -lt  "2" ]; then # need to create a frame               
  # -c $@ with no args just opens the scratch buffer                             
  emacsclient -n -c "$@" && change_focus                                         
else # there is already a visible frame besides the daemon, so                   
  change_focus                                                                   
  # -n $@ errors if there are no args                                            
  test  "$#" -ne "0" && emacsclient -n "$@"                                      
fi