augroup MAX_FANCYLINE
    set noshowmode    | " mode would otherwise be shown twice- in lightline and below. We want to deactivate one.
    set laststatus=2  | " required by AirLine and Lightline, without status line does not appear until a window split

    let g:status_sym_start         = ''
    let g:status_sym_end           = ''
    let g:status_sym_sep_start     = '│'
    let g:status_sym_sep_end       = '│'
    let g:symbol_branch            = ''
    let g:symbol_screen_edge       = '░'

    if &term == "linux"
        let g:group_active         = "StatusLineTerm"
        let g:group_inactive       = "StatusLineTermNC"
        let g:group_tabline        = "StatusLineTerm"
    else
        let g:group_active         = "StatusLine"
        let g:group_inactive       = "StatusLineNC"
        " let g:group_tabline        = "TabLine"
        let g:group_tabline        = "StatusLine"
    endif

    " this function reverts foreground color and background color of a given
    " highlight group and returns the name of a newly created _invert group
    function! CreateInvertGroup(highlight_group)
        if(synIDattr(hlID(a:highlight_group), "reverse")==1)
            let w:color=synIDattr(hlID(a:highlight_group), "fg#")
        else
            let w:color=synIDattr(hlID(a:highlight_group), "bg#")
        endif

        let l:retval=a:highlight_group.'_invert'
        if(exists('w:color') && w:color == '')
            let w:color = 'NONE'
        endif
        silent! exec 'highlight '.l:retval.' guifg='.w:color.' ctermfg='.w:color
        return l:retval
    endfunction

    function! UpdateStatus(highlight_group)
        let l:invert_group = CreateInvertGroup(a:highlight_group)
        let l:mode = get({
                    \  'n'      : 'normal',
                    \  'i'      : 'insert',
                    \  'R'      : 'replace',
                    \  'v'      : 'visual',
                    \  "V"      : 'visual line',
                    \  "\<C-V>" : 'visual block',
                    \  'c'      : 'command',
                    \  's'      : 'select',
                    \  'S'      : 'select line',
                    \  "\<C-s>" : 'select block',
                    \  't'      : 'terminal'
                    \ }, mode(), mode())
        return ''
                    \ ."%#StatusLineHighlight#"
                    \ ."%#".a:highlight_group."#"
                    \ .g:symbol_screen_edge.' '
                    \ ."%{(&readonly\ ?\ '\ \ 🔒'\ :\ '')}"
                    \ ."%{(&modified\ ?\ '\ \ 💾'\ :\ '')}"
                    \ ."%(%w%h%q%)".l:mode.' '.g:status_sym_sep_start
                    \ ."%{(argc()>1\ ?\ ' '.(argidx()+1).':'.argc().' '.g:status_sym_sep_start:'')}"
                    \ ."%{(haslocaldir() ?\ fnamemodify(getcwd(),\ ':.').'/ '\ \:'')}\ "
                    \ ."%{winbufnr(0).': '}"
                    \ ."%{bufname('%')==''?'':substitute(bufname('%'),\ '^'.getcwd(-1).'/*',\ '',\ '')}"
                    \ ."%{(&titlestring\ ?\ has('nvim')?b:term_title:expand(&titlestring):'')\ }"
                    \ .' '
                    \ ."%#".l:invert_group."#"
                    \ .g:status_sym_end
                    \ .'%<'
                    \ .''
                    \ ."%="
                    \ .''
                    \ ."%#".l:invert_group."#"
                    \ .g:status_sym_start
                    \ ."%#".a:highlight_group."#".' '
                    \ ."%{&buftype==''?'':&buftype.' '.g:status_sym_sep_end.' '}"
                    \ ."%{&filetype==''?'':&filetype.' '.g:status_sym_sep_end.' '}"
                    \ ."%{(&spell\ ?\ &spelllang.' '.g:status_sym_sep_end\ :\ '')}"
                    \ ."%{(&fileencoding=~'^$\\|^utf\-8$'?'':&fileencoding.' '.g:status_sym_sep_end.' ')}"
                    \ ."%{(&fileformat=~'^$\\|^unix$'?'':&fileformat.' '.g:status_sym_sep_end)}"
                    \ ."%cx%-l: "
                    \ .g:status_sym_sep_end
                    \ .' '
                    \ .'%p%% '
                    \ .g:symbol_screen_edge
    endfunction

    function! UpdateTabline(highlight_group)
        let l:invert_group = CreateInvertGroup(a:highlight_group)
        let l:git_branch   = FugitiveHead()
        return ''
                    \ .'%#'.a:highlight_group.'#'
                    \ .g:symbol_screen_edge
                    \ .' '
                    \ .'%#'.a:highlight_group.'#'
                    \ .'%-2( %)'
                    \ .'%{getcwd(-1)}'
                    \ .' '
                    \ ."%{FugitiveHead()==''?'':g:status_sym_sep_start.' '.g:symbol_branch.' '.FugitiveHead()}"
                    \ .' '
                    \ .'%#'.l:invert_group.'#'
                    \ .g:status_sym_end
                    \ .'%<'
                    \ .'%='
                    \ .'%#'.l:invert_group.'#'
                    \ .g:status_sym_start
                    \ .'%(%#'.a:highlight_group.'#%)'
                    \ .' '
                    \ .'%-3(%)'
                    \ .'%(%#'.a:highlight_group.'#%)'
                    \ .'%(%{v:servername} %{v:this_session}%)'
                    \ .g:status_sym_sep_end.' '
                    \ .'%-3(%)'
                    \ .'%#'.a:highlight_group.'#'
                    \ .'%{tabpagenr()}/%{tabpagenr()}'
                    \ .' '
                    \ .g:symbol_screen_edge
                    \ ."%##"
                    \ ."" " end
    endfunction

    function! ApplyColorScheme()
        " set termguicolors | " When on, uses highlight-guifg and highlight-guibg attributes in the terminal (=24bit color) incompatible with nvim
        " set t_ut=
        " set up statusline, global and current window individually
        set statusline=%!UpdateStatus(g:group_inactive)
        setlocal statusline=%!UpdateStatus(g:group_active)
        " set up the tabline (match colors)
        set tabline=%!UpdateTabline(g:group_tabline)

        " otherwise 'bold' can mess up icon sizes and I do not know why
        highlight! StatusLine cterm=reverse
        " exec 'highlight! User3 guifg=#D2A032 guibg='.l:fgcolor
    endfunction
    " apply colors from the loaded colorscheme...
    " when changing the colorscheme also apply new colors to the statusbar...
    autocmd VimEnter,ColorScheme  * call ApplyColorScheme()

    autocmd WinEnter    * setlocal statusline=%!UpdateStatus(g:group_active)
    autocmd WinLeave    * setlocal statusline<
augroup END " MAX_FANCYLINE