" key mappings
let mapleader = ","
noremap <Leader>s :update<CR>
nmap <leader>p :set paste!<CR>
nmap <leader>h :set hlsearch!<CR>
nmap <leader>t :wa <bar> :Make test<CR>

" navigate buffers by ctrl-b
nmap <C-b> :bprevious<CR>
nmap <C-B> :bnext<CR>

nnoremap ; :

" no cheating !
map <up> <nop>
map <down> <nop>
map <left> <nop>
map <right> <nop>

" for damaged keyboards
map <F1> <Esc>
imap <F1> <Esc>

" special chars
nmap <leader>l :set list!<CR>

" search
nnoremap <leader>v :FzfFiles<cr>
nnoremap <leader>u :FzfTags<cr>
nnoremap <leader>j :call fzf#vim#tags("'".expand('<cword>'))<cr>
nnoremap <leader>/ :Find
nnoremap <leader>' :execute "Find " . expand("<cword>")<cr>

" tree
map <leader>n :NERDTreeToggle<CR>

" completion
inoremap <expr> <Tab> pumvisible() ? "\<C-n>" : "\<Tab>"
inoremap <expr> <S-Tab> pumvisible() ? "\<C-p>" : "\<S-Tab>"
inoremap <expr> <cr> pumvisible() ? "\<C-y>" : "\<cr>"
imap <c-space> <Plug>(asyncomplete_force_refresh)

function! s:check_back_space() abort
    let col = col('.') - 1
    return !col || getline('.')[col - 1]  =~ '\s'
endfunction

inoremap <silent><expr> <TAB>
  \ pumvisible() ? "\<C-n>" :
  \ <SID>check_back_space() ? "\<TAB>" :
  \ asyncomplete#force_refresh()
inoremap <expr><S-TAB> pumvisible() ? "\<C-p>" : "\<C-h>"