" ------------------- COC config -----------------------

set updatetime=300

set shortmess+=c

set signcolumn=yes

set nobackup
set nowritebackup

set cmdheight=2

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

" Use <cr> for 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>"

" Use `[c` and `]c` for navigate diagnostics
nmap <silent> [c <Plug>(coc-diagnostic-prev)
nmap <silent> ]c <Plug>(coc-diagnostic-next)

" Remap keys for gotos
nmap <silent> gd <Plug>(coc-definition)
nmap <silent> gy <Plug>(coc-type-definition)
nmap <silent> gi <Plug>(coc-implementation)
nmap <silent> gr <Plug>(coc-references)

" Remap for do codeAction of current line
nmap <leader>ac <Plug>(coc-codeaction)

" Remap for do action format
"nmap <silent> F <Plug>(coc-action-format) "does not work
nnoremap <silent> F :call CocAction('format')<CR>

" Temporary command to run brittany in Haskell projects (ghcide does not support it yet)
nnoremap <leader>af :r !brittany --write-mode=inplace %:p<CR>

" Temporary command to run hlint in Haskell projects (ghcide does not support it yet)
nnoremap <leader>al :AsyncRun hlint %:p<CR>

" Show signature help
autocmd User CocJumpPlaceholder call CocActionAsync('showSignatureHelp')

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

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

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

" Remap for rename current word
nmap <leader>rn <Plug>(coc-rename)

" Show all diagnostics
nnoremap <silent> <space>a  :<C-u>CocList diagnostics<cr>
" Find symbol of current document
nnoremap <silent> <space>o  :<C-u>CocList outline<cr>
" Search workspace symbols
nnoremap <silent> <space>s  :<C-u>CocList -I symbols<cr>
" Do default action for next item.
nnoremap <silent> <space>j  :<C-u>CocNext<CR>
" Do default action for previous item.
nnoremap <silent> <space>k  :<C-u>CocPrev<CR>
" Resume latest coc list
nnoremap <silent> <space>p  :<C-u>CocListResume<CR>

nnoremap <silent> <M-B> :call CocRequest('metals', 'workspace/executeCommand', { 'command': 'build-import' })<CR>
"nnoremap <silent> <M-Z> :ccl<CR>

" COC Snippets

" Use <C-l> for trigger snippet expand.
imap <C-l> <Plug>(coc-snippets-expand)

" Use <C-j> for select text for visual placeholder of snippet.
vmap <C-j> <Plug>(coc-snippets-select)

" Use <C-j> for jump to next placeholder, it's default of coc.nvim
let g:coc_snippet_next = '<c-j>'

" Use <C-k> for jump to previous placeholder, it's default of coc.nvim
let g:coc_snippet_prev = '<c-k>'

" Use <C-j> for both expand and jump (make expand higher priority.)
imap <C-j> <Plug>(coc-snippets-expand-jump)