if has('nvim')
	set title titlestring=%(%{expand(\"%:~:.:h\")}%)/%t\ -\ NVIM
else
	set title titlestring=%(%{expand(\"%:~:.:h\")}%)/%t\ -\ VIM
endif

" Maps <C-h/j/k/l> to switch vim splits in the given direction. If there are
" no more windows in that direction, forwards the operation to tmux.
" Additionally, <C-\> toggles between last active vim splits/tmux panes.

if exists("g:loaded_tmux_navigator") || &cp || v:version < 700
  finish
endif
let g:loaded_tmux_navigator = 1

if !exists("g:tmux_navigator_save_on_switch")
  let g:tmux_navigator_save_on_switch = 0
endif

function! s:UseTmuxNavigatorMappings()
  return !exists("g:tmux_navigator_no_mappings") || !g:tmux_navigator_no_mappings
endfunction

function! s:UseTmuxNavigatorMappingsInInsertMode()
  return exists("g:tmux_navigator_insert_mode")
endfunction

function! s:InTmuxSession()
  return $TMUX != ''
endfunction

function! s:TmuxPaneCurrentCommand()
  echo system("tmux display-message -p '#{pane_current_command}'")
endfunction
command! TmuxPaneCurrentCommand call <SID>TmuxPaneCurrentCommand()

let s:tmux_is_last_pane = 0
au WinEnter * let s:tmux_is_last_pane = 0

" Like `wincmd` but also change tmux panes instead of vim windows when needed.
function! s:TmuxWinCmd(direction)
  if s:InTmuxSession()
      call s:TmuxAwareNavigate(a:direction)
  else
      let oldw = winnr()
      call s:VimNavigate(a:direction)

      if oldw == winnr()
          call s:SystemWindowNavigate(a:direction)
      endif
  endif
endfunction

function! s:NeedsVitalityRedraw()
  return exists('g:loaded_vitality') && v:version < 704 && !has("patch481")
endfunction

function! s:TmuxGetActivePaneId()
   let cmd = "tmux list-panes -F '#P #{?pane_active,active,}'"
   let list = split(system(cmd), '\n')
   let paneID = ''

   for pane in list
       if match(pane, 'active') != -1
           let paneID = pane
       endif
   endfor
   return paneID
endfunction

function! s:TmuxAwareNavigate(direction)
  let nr = winnr()
  let tmux_last_pane = (a:direction == 'p' && s:tmux_is_last_pane)
  if !tmux_last_pane
    call s:VimNavigate(a:direction)
  endif

  " Forward the switch panes command to tmux if:
  " a) we're toggling between the last tmux pane;
  " b) we tried switching windows in vim but it didn't have effect.
  if tmux_last_pane || nr == winnr()
    if g:tmux_navigator_save_on_switch
      update
    endif

	if a:direction == 'p'
        finish
    endif

	let dir = s:CmdToDir(a:direction)

    let cmd = 'sh ~/.config/awesome/awesomewm-vim-tmux-navigator/tmux_focus.sh '. dir
    silent call system(cmd)

    if s:NeedsVitalityRedraw()
      redraw!
    endif
    let s:tmux_is_last_pane = 1
  else
    let s:tmux_is_last_pane = 0
  endif
endfunction

function! s:VimNavigate(direction)
    try
        execute 'wincmd ' . a:direction
    catch
        echohl ErrorMsg | echo 'E11: Invalid in command-line window; <CR> executes, CTRL-C quits: wincmd k' | echohl None
    endtry
endfunction

func! s:SystemWindowNavigate(cmd)
	if a:cmd == 'p'
        finish
    endif
	let dir = s:CmdToDir(a:cmd)
    call system('awesome-client ''awesome.emit_signal("navigator::focus","' . dir . '")''')

    if !has("gui_running")
        redraw!
    endif
endfunction

func! s:CmdToDir(cmd)
	if a:cmd == 'h'
		return "left"
    elseif a:cmd == 'j'
		return "down"
    elseif a:cmd == 'k'
		return "up"
    elseif a:cmd == 'l'
		return "right"
    endif
endfunction

command! TmuxNavigateLeft call <SID>TmuxWinCmd('h')
command! TmuxNavigateDown call <SID>TmuxWinCmd('j')
command! TmuxNavigateUp call <SID>TmuxWinCmd('k')
command! TmuxNavigateRight call <SID>TmuxWinCmd('l')
command! TmuxNavigatePrevious call <SID>TmuxWinCmd('p')

if s:UseTmuxNavigatorMappings()
  nnoremap <silent> <c-h> :TmuxNavigateLeft<cr>
  nnoremap <silent> <c-j> :TmuxNavigateDown<cr>
  nnoremap <silent> <c-k> :TmuxNavigateUp<cr>
  nnoremap <silent> <c-l> :TmuxNavigateRight<cr>
  nnoremap <silent> <c-\> :TmuxNavigatePrevious<cr>
  if s:UseTmuxNavigatorMappingsInInsertMode()
    inoremap <silent> <c-h> <Esc>:TmuxNavigateLeft<cr>
    inoremap <silent> <c-j> <Esc>:TmuxNavigateDown<cr>
    inoremap <silent> <c-k> <Esc>:TmuxNavigateUp<cr>
    inoremap <silent> <c-l> <Esc>:TmuxNavigateRight<cr>
    inoremap <silent> <c-\> <Esc>:TmuxNavigatePrevious<cr>
  endif
endif