module GlobalHotkeysManager

# File lib/global_hotkeys_manager.rb, line 113
def self.ask_for_key
  `xbindkeys -f #{XBINDKEYSRC} -k`.split("\n").last
end

# File lib/global_hotkeys_manager.rb, line 23
def self.ensure_running
  id = pid and `kill #{id}`
  `[ -f #{XBINDKEYSRC} ] && xbindkeys -f #{XBINDKEYSRC}`
end

# File lib/global_hotkeys_manager.rb, line 96
def self.grab_window
  wid = `xdotool selectwindow`.to_i
  new_key = ask_for_key
  new_name = `xdotool getwindowname #{wid}`
  new_state = []
  updated = false
  hotkeys.each do |(id, name, key, mapped)|
    if id == wid
      updated = true
      key = new_key
    end
    new_state.push [id, name, key, mapped]
  end
  new_state.push [wid, new_name, new_key, true] unless updated
  update_config new_state
end

# File lib/global_hotkeys_manager.rb, line 32
def self.hotkeys
  return [] unless File.exist? HOTKEYS_JSON
  JSON.parse(File.read HOTKEYS_JSON).find_all do |(id, name, key, mapped)|
    valid_window_id?(id)
  end
end

# File lib/global_hotkeys_manager.rb, line 43
def self.map_all
  hotkeys.each do |(id, name, key, mapped)|
    `xdotool windowmap #{id}` rescue nil
  end
end

# File lib/global_hotkeys_manager.rb, line 18
def self.pid
  return unless pid = `pgrep -o -f xbindkeys.*hotkeys`.split("\n").find{|p| system "kill -0 #{p}"}
  system("kill -0 #{pid}") and pid.to_i
end

# File lib/global_hotkeys_manager.rb, line 28
def self.stop
  pid and `kill #{pid}`
end

# File lib/global_hotkeys_manager.rb, line 49
def self.toggle(wid)
  new_state = []
  hotkeys.each do |(id, name, key, mapped)|
    if id == wid
      mapped = !mapped
      if mapped
        `xdotool windowmap #{id}`
        `xdotool windowactivate #{id}`
      else
        `xdotool windowunmap #{id}`
      end
    end
    new_state.push [id, name, key, mapped]
  end
  update_config new_state
end

# File lib/global_hotkeys_manager.rb, line 66
def self.update_config(hotkeys)
  hotkeys = hotkeys.find_all{|(id, name, key, mapped)| valid_window_id? id}
  File.write HOTKEYS_JSON, JSON.unparse(hotkeys)
  File.write XBINDKEYSRC, hotkeys.map{|(id, name, key, mapped)|
    # webrick has a bug and require content-length to be sent
    # using curl is faster but in case it's not installed we fall back to the command line
    %Q{\##{name}\n"curl -H 'Content-Length: 0' -X POST #{URL_BASE}/toggle/#{id} || global_hotkeys_manager toggle #{id}"\n#{key}\n}
  }.join("\n\n")
  ensure_running
end

# File lib/global_hotkeys_manager.rb, line 86
def self.update_key(wid)
  new_key = ask_for_key
  new_state = []
  hotkeys.each do |(id, name, key, mapped)|
    key = new_key if id == wid
    new_state.push [id, name, key, mapped]
  end
  update_config new_state
end

# File lib/global_hotkeys_manager.rb, line 77
def self.update_name(wid, new_name)
  new_state = []
  hotkeys.each do |(id, name, key, mapped)|
    name = new_name if id == wid
    new_state.push [id, name, key, mapped]
  end
  update_config new_state
end

# File lib/global_hotkeys_manager.rb, line 39
def self.valid_window_id?(id)
  system "xwininfo -id #{id} > /dev/null 2>&1"
end