""
"" Environment
""

set directory=$XDG_CACHE_HOME/vim,~/,/tmp
set backupdir=$XDG_CACHE_HOME/vim,~/,/tmp
set viminfo+=n$XDG_CACHE_HOME/vim/viminfo
set rtp=$XDG_CONFIG_HOME/vim,$XDG_CONFIG_HOME/vim/after,$VIM,$VIMRUNTIME
let $MYVIMRC="$XDG_CONFIG_HOME/vim/vimrc"


""
"" Plugins
""

set rtp+=$XDG_CACHE_HOME/vim/plugins/Vundle.vim
call vundle#begin('$XDG_CACHE_HOME/vim/plugins')

Plugin 'VundleVim/Vundle.vim'
Plugin 'kien/ctrlp.vim'
Plugin 'townk/vim-autoclose'
Plugin 'tpope/vim-fugitive'
Plugin 'sjl/gundo.vim'
Plugin 'itchyny/lightline.vim'
Plugin 'tpope/vim-markdown'
Plugin 'scrooloose/nerdtree'
Plugin 'jistr/vim-nerdtree-tabs'
Plugin 'ervandew/supertab'
Plugin 'majutsushi/tagbar'
Plugin 'scrooloose/syntastic'

call vundle#end()


""
"" Plugins
""
                                                                                                   " Lightline
let g:lightline = {
    \"active": {
    \    "left": [[ "mode", "paste" ], ["fugitive", "filename", "readonly", "ctrlpmark"]],
    \    "right": [ ["syntastic", "lineinfo"], ["percent"], ["fileformat", "fileencoding", "filetype"]]
    \ },
	\"component": {
    \"readonly": '%{&filetype=="help"?"":&readonly?"∅":""}',
    \"modified": '%{&filetype=="help"?"":&modified?"+":&modifiable?"":"-"}'
    \ },
    \'component_visible_condition': {
    \"readonly": '(&filetype!="help"&& &readonly)',
    \"modified": '(&filetype!="help"&&(&modified||!&modifiable))'
    \ },
    \"component_expand": {
    \    "syntastic": "SyntasticStatuslineFlag",
    \ },
    \"component_type": {
    \    "syntastic": "error",
    \ },
    \"component_function": {
    \    "filename": "Filename",
	  \    "fugitive": "Fugitive",
    \    "fileformat": "Fileformat",
    \    "filetype": "Filetype",
    \    "fileencoding": "Fileencoding",
    \    "mode": "Mode",
    \    "ctrlpmark": "CtrlPMark",
    \ }
\ }

let g:syntastic_check_on_open = 1                                                                  " Syntactic
let g:syntastic_enable_signs = 1                                                                   "
let g:syntastic_python_checkers = ["flake8", "python"]                                             "
let g:syntastic_python_python_exe = 'python3'                                                      "

let g:tagbar_status_func = "TagbarStatusFunc"                                                      " Tagbar
let g:tagbar_compact = 1                                                                           "
let g:tagbar_iconchars = ["▸", "▾"]                                                                "

let g:miniBufExplMapWindowNavVim = 1                                                               " MiniBufferExplorer
let g:miniBufExplMapWindowNavArrows = 1                                                            "
let g:miniBufExplMapCTabSwitchBufs = 1                                                             "
let g:miniBufExplModSelTarget = 1                                                                  "

let g:nerdtree_tabs_open_on_gui_startup = 0                                                        " NerdTree
let g:nerdtree_tabs_open_on_console_startup = 0                                                    "

let g:ctrlp_clear_cache_on_exit=0                                                                  " CtrlP
let g:ctrlp_status_func = {"main": "CtrlPStatusMain", "prog": "CtrlPStatusProg"}                   "
let g:ctrlp_custom_ignore = {"dir": "\v[\/]\.(git|hg|svn|ve)$"}                                    "

""
"" Impostazioni generali
""

set spell spelllang=it                                                                             " Controllo ortografico...
set nospell                                                                                        " ...solo quando serve

set nocompatible                                                                                   " Disabilita la compatibilità con vi
set backspace=2                                                                                    " Fix per il DEL nel terminale
set hidden                                                                                         " Nasconde i buffers
set history=1000                                                                                   " Aumenta la cronologia
set incsearch                                                                                      " Ricerca incrementale
set hlsearch                                                                                       " Evidenzia i risultati della ricerca

set ignorecase                                                                                     " Ricerca case insensitive...
set smartcase                                                                                      " ...per i termini minuscoli
set laststatus=2                                                                                   "

set mouse=a                                                                                        " Abilita il supporto al mouse
set showcmd                                                                                        " Mostra il comando mentre lo digit
set ruler                                                                                          " Mostra la posizione della linea/colonna
set vb t_vb=                                                                                       " Disabilita i beep

set nobackup                                                                                       " Disabilita i backup ~
set noswapfile                                                                                     " Disabilita i file di Swap
set writebackup                                                                                    " Abilita backup temporanei

set undodir=$XDG_CACHE_HOME/vim/undo                                                               " Mantiene la cronologia
set undofile                                                                                       "

set wildmenu                                                                                       " Autocompletamento dei comandi
set encoding=utf-8                                                                                 " Codifica
set nomodeline                                                                                     " Sicurezza
set tabpagemax=10                                                                                  " Limita il numero di tab a 10
set showmatch                                                                                      " Evidenzia le parentesi selezionate
set ffs=unix,mac                                                                                   " Formato Unix e Mac per i file
set clipboard=unnamed                                                                              " Integrazione con la clipboard
set ttyfast                                                                                        " Migliora il redrawing in xterm
filetype indent plugin on                                                                          " Riconoscimento del tipo del file
set wildignore+=*/tmp/*,*.so,*.swp,*.zip                                                           " Altri file da ignorare

set shiftwidth=4                                                                                   " Tab
set tabstop=4                                                                                      "
set noexpandtab                                                                                    "

set number                                                                                         " Numerazione
set autoindent                                                                                     " Indentazione
set smartindent                                                                                    "
set noshowmode                                                                                     "

syntax on                                                                                          " Abilita il syntax-highlighter

set go-=r                                                                                          " Nascondi barre di scorrimento
set go-=L                                                                                          "


syntax enable                                                                                      "
hi NonText guifg=bg                                                                                "

set titlestring=%t%(\ %M%)%(\ (%{expand(\"%:p:h\")})%)%(\ %a%)                                     " Barra del titolo senza “-VIM”


""
"" Funzioni
""

function! Fugitive()
  if &ft !~? 'nerdtree\|gundo\|tagbar' && exists("*fugitive#head")
    let _ = fugitive#head()
    return strlen(_) ? "⭠ "._ : ""
  endif
  return ''
endfunction

function! Modified()
  return &ft =~ "help" ? "" : &modified ? "+" : &modifiable ? "" : "-"
endfunction

function! Readonly()
  return &ft !~? "help" && &readonly ? "RO" : ""
endfunction

function! Filename()
  let fname = expand('%:t')
  return fname == 'ControlP' ? g:lightline.ctrlp_item :
        \ fname == '__Tagbar__' ? g:lightline.fname :
        \ fname =~ '__Gundo\|NERD_tree' ? '' :
        \ ('' != fname ? fname : '[No Name]') .
        \ ('' != Modified() ? ' ' . Modified() : '')
endfunction

function! Fileformat()
  return winwidth(0) > 70 ? &fileformat : ""
endfunction

function! Filetype()
  return winwidth(0) > 70 ? (strlen(&filetype) ? &filetype : "no ft") : ""
endfunction

function! Fileencoding()
  return winwidth(0) > 70 ? (strlen(&fenc) ? &fenc : &enc) : ""
endfunction

function! Mode()
  let fname = expand("%:t")
  return fname == "__Tagbar__" ? "Tagbar" :
        \ fname == "ControlP" ? "CtrlP" :
        \ fname == "__Gundo__" ? "Gundo" :
        \ fname == "__Gundo_Preview__" ? "Gundo Preview" :
        \ fname =~ "NERD_tree" ? "NERDTree" :
        \ winwidth(0) > 60 ? lightline#mode() : ""
endfunction

function! CtrlPMark()
  if expand("%:t") =~ "ControlP"
    call lightline#link("iR"[g:lightline.ctrlp_regex])
    return lightline#concatenate([g:lightline.ctrlp_prev, g:lightline.ctrlp_item
          \ , g:lightline.ctrlp_next], 0)
  else
    return ""
  endif
endfunction

function! CtrlPStatusMain(focus, byfname, regex, prev, item, next, marked)
  let g:lightline.ctrlp_regex = a:regex
  let g:lightline.ctrlp_prev = a:prev
  let g:lightline.ctrlp_item = a:item
  let g:lightline.ctrlp_next = a:next
  return lightline#statusline(0)
endfunction

function! CtrlPStatusProg(str)
  return lightline#statusline(0)
endfunction

function! TagbarStatusFunc(current, sort, fname, ...) abort
    let g:lightline.fname = a:fname
  return lightline#statusline(0)
endfunction


""
"" Mapping
""

map <C-k> <C-w><Up>                                                                                " Navigazione tra le finestre
map <C-j> <C-w><Down>                                                                              "
map <C-l> <C-w><Right>                                                                             "
map <C-h> <C-w><Left>                                                                              "

map <F2> :GundoToggle<CR>                                                                          " Apri Gundo
map <F3> :call ToggleSpell()<CR>                                                                   " Controllo ortografico
map <F5> :NERDTreeTabsToggle<CR>                                                                   " Apri NERDTree
map <F6> :TagbarToggle<CR>                                                                         " Apri Tagbar
map <D-e> :q!<CR>                                                                                  " Esci senza salvare


""
"" Varie
""

set tags=$XDG_CACHE_HOME/vim/tags                                                                  " Tags