" if hidden is not set, TextEdit might fail.
set hidden

" Some servers have issues with backup files, see #649
set nobackup
set nowritebackup

" Better display for messages
set cmdheight=2

" You will have bad experience for diagnostic messages when it's default 4000.
set updatetime=300

" don't give |ins-completion-menu| messages.
set shortmess+=c

" always show signcolumns
set signcolumn=yes

" python .env-contains-pythonpath support
autocmd FileType python let b:coc_root_patterns = ['.cocroot', '.git', '.env']

" useful key shortcuts
nmap <silent> rn <Plug>(coc-rename)
nmap <silent> td <Plug>(coc-definition)
nmap <silent> ty <Plug>(coc-type-definition)
nmap <silent> ti <Plug>(coc-implementation)
nmap <silent> tr <Plug>(coc-references)
nmap <silent> te <Plug>(coc-diagnostic-next-error)
nmap <silent> tn <Plug>(coc-diagnostic-next)
xmap ,r   <Plug>(coc-format)
nmap ,r   <Plug>(coc-format)

" Add `:Format` command to format current buffer.
command! -nargs=0 Format :call CocAction('format')

nmap f <Plug>(coc-smartf-forward)
nmap F <Plug>(coc-smartf-backward)
nmap ; <Plug>(coc-smartf-repeat)
nmap , <Plug>(coc-smartf-repeat-opposite)

augroup Smartf
  autocmd User SmartfEnter :hi Conceal ctermfg=220 guifg=#6638F0
  autocmd User SmartfLeave :hi Conceal ctermfg=239 guifg=#504945
augroup end


" Use tab for trigger completion with characters ahead and navigate.
" Use command ':verbose imap <tab>' to make sure tab is not mapped by other plugin.
inoremap <silent><expr> <TAB>
      \ pumvisible() ? "\<C-n>" :
      \ <SID>check_back_space() ? "\<TAB>" :
      \ coc#refresh()
inoremap <expr><S-TAB> pumvisible() ? "\<C-p>" : "\<C-h>"

inoremap <expr> <Tab> pumvisible() ? "\<C-n>" : "\<Tab>"
inoremap <expr> <S-Tab> pumvisible() ? "\<C-p>" : "\<S-Tab>"
function! s:check_back_space() abort
  let col = col('.') - 1
  return !col || getline('.')[col - 1]  =~# '\s'
endfunction

" Use <c-space> to trigger completion.
inoremap <silent><expr> <c-space> coc#refresh()

" Use <cr> to confirm completion, `<C-g>u` means break undo chain at current position.
" Coc only does snippet and additional edit on confirm.
inoremap <expr> <cr> pumvisible() ? "\<C-y>" : "\<C-g>u\<CR>"
" Or use `complete_info` if your vim support it, like:
" inoremap <expr> <cr> complete_info()["selected"] != "-1" ? "\<C-y>" : "\<C-g>u\<CR>"

" Use K to show documentation in preview window
nnoremap <silent> K :call <SID>show_documentation()<CR>

function! s:show_documentation()
  if (index(['vim','help'], &filetype) >= 0)
    execute 'h '.expand('<cword>')
  else
    call CocAction('doHover')
  endif
endfunction

" Highlight symbol under cursor on CursorHold
autocmd CursorHold * silent call CocActionAsync('highlight')