" Fundamentals "{{{
" ---------------------------------------------------------------------
set nocompatible              " be iMproved, required
filetype off                  " required

" Install vim-plug if not already installed
if empty(glob('~/.vim/autoload/plug.vim'))
  silent !curl -fLo ~/.vim/autoload/plug.vim --create-dirs
    \ https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
  autocmd VimEnter * PlugInstall --sync | source $MYVIMRC
endif

"}}}

filetype plugin indent on    " required

" Load plugins
runtime ./plug.vim

colorscheme gruvbox

let mapleader=" "                           " Set leader key

" Set variables
runtime ./sets.vim

" Fix for smart indent edge-case
" https://vi.stackexchange.com/a/22924
filetype indent off
function F_ind()
   let n_ind = indent(line('.'))
   let n_col = col('.') - 1
   if n_col > n_ind
      return "\n" . repeat("\t", n_ind / 4)
   else
      return "\n" . repeat("\t", n_col / 4)
   endif
endfunction
imap <expr> <CR> F_ind()

" when running at every change you may want to disable quickfix
let g:prettier#quickfix_enabled = 0
let g:prettier#autoformat = 0

"completion settings:
set completeopt+=menuone
set completeopt+=noselect
set completeopt+=noinsert
set completeopt+=preview
set shortmess+=c   " Shut off completion messages
set belloff+=ctrlg " If Vim beeps during completion
let g:mucomplete#enable_auto_at_startup = 1

" Always show the signcolumn, otherwise it would shift the text each time
" diagnostics appear/become resolved.
if has("nvim-0.5.0") || has("patch-8.1.1564")
  " Recently vim can merge signcolumn and number column into one
  set signcolumn=yes:2
else
  set signcolumn=yes
endif

" NERDCommenter

let g:NERDSpaceDelims = 1
let g:NERDDefaultAlign = 'left'

" COC

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

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

" Use <c-space> to trigger completion.
if has('nvim')
  inoremap <silent><expr> <c-space> coc#refresh()
else
  inoremap <silent><expr> <c-@> coc#refresh()
endif

" Make <CR> auto-select the first completion item and notify coc.nvim to
" format on enter, <cr> could be remapped by other vim plugin
inoremap <silent><expr> <cr> pumvisible() ? coc#_select_confirm()
                              \: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"

" Use `[g` and `]g` to navigate diagnostics
" Use `:CocDiagnostics` to get all diagnostics of current buffer in location list.
nmap <silent> [g <Plug>(coc-diagnostic-prev)
nmap <silent> ]g <Plug>(coc-diagnostic-next)

" GoTo code navigation.
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)

" 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>')
  elseif (coc#rpc#ready())
    call CocActionAsync('doHover')
  else
    execute '!' . &keywordprg . " " . expand('<cword>')
  endif
endfunction

" Highlight the symbol and its references when holding the cursor.
autocmd CursorHold * silent call CocActionAsync('highlight')

" Symbol renaming.
nmap <leader>rn <Plug>(coc-rename)

" Formatting selected code.
xmap <leader>f  <Plug>(coc-format-selected)
nmap <leader>f  <Plug>(coc-format-selected)

augroup mygroup
  autocmd!
  " Setup formatexpr specified filetype(s).
  autocmd FileType typescript,json setl formatexpr=CocAction('formatSelected')
  " Update signature help on jump placeholder.
  autocmd User CocJumpPlaceholder call CocActionAsync('showSignatureHelp')
augroup end

" Applying codeAction to the selected region.
" Example: `<leader>aap` for current paragraph
xmap <leader>a  <Plug>(coc-codeaction-selected)
nmap <leader>a  <Plug>(coc-codeaction-selected)

" Remap keys for applying codeAction to the current buffer.
nmap <leader>ac  <Plug>(coc-codeaction)
nmap <M-CR> <Plug>(coc-codeaction)
vmap <M-CR> <Plug>(coc-codeaction)
" Apply AutoFix to problem on the current line.
nmap <leader>f  <Plug>(coc-fix-current)

" Map function and class text objects
" NOTE: Requires 'textDocument.documentSymbol' support from the language server.
xmap if <Plug>(coc-funcobj-i)
omap if <Plug>(coc-funcobj-i)
xmap af <Plug>(coc-funcobj-a)
omap af <Plug>(coc-funcobj-a)
xmap ic <Plug>(coc-classobj-i)
omap ic <Plug>(coc-classobj-i)
xmap ac <Plug>(coc-classobj-a)
omap ac <Plug>(coc-classobj-a)

" Remap <C-f> and <C-b> for scroll float windows/popups.
if has('nvim-0.4.0') || has('patch-8.2.0750')
  nnoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? coc#float#scroll(1) : "\<C-f>"
  nnoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? coc#float#scroll(0) : "\<C-b>"
  inoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? "\<c-r>=coc#float#scroll(1)\<cr>" : "\<Right>"
  inoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? "\<c-r>=coc#float#scroll(0)\<cr>" : "\<Left>"
  vnoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? coc#float#scroll(1) : "\<C-f>"
  vnoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? coc#float#scroll(0) : "\<C-b>"
endif

" Use CTRL-S for selections ranges.
" Requires 'textDocument/selectionRange' support of language server.
nmap <silent> <C-s> <Plug>(coc-range-select)
xmap <silent> <C-s> <Plug>(coc-range-select)

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

" Add `:Fold` command to fold current buffer.
command! -nargs=? Fold :call     CocAction('fold', <f-args>)

" Add `:OR` command for organize imports of the current buffer.
command! -nargs=0 OR   :call     CocAction('runCommand', 'editor.action.organizeImport')

" Add (Neo)Vim's native statusline support.
" NOTE: Please see `:h coc-status` for integrations with external plugins that
" provide custom statusline: lightline.vim, vim-airline.
set statusline^=%{coc#status()}%{get(b:,'coc_current_function','')}

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

" FZF

let $FZF_DEFAULT_COMMAND = 'rg --files --hidden --follow -g "!.git/" -g "!node_modules/"'

" NerdTree

let NERDTreeShowHidden=1

" Exit Vim if NERDTree is the only window left.
autocmd BufEnter * if tabpagenr('$') == 1 && winnr('$') == 1 && exists('b:NERDTree') && b:NERDTree.isTabTree() |
    \ quit | endif

" Mirror the NERDTree before showing it. This makes it the same on all tabs.
nnoremap <C-t> :NERDTreeMirror<CR>:NERDTreeFind<CR>

" Rainbow Brackets
let g:rainbow_active = 1

" Lightline
let g:lightline = {
      \ 'colorscheme': 'wombat',
      \ 'active': {
      \   'left': [ [ 'mode', 'paste' ],
      \             [ 'gitbranch', 'readonly', 'filename', 'modified' ] ],
      \ },
      \ 'component_function': {
      \   'gitbranch': 'FugitiveHead',
      \ },
      \ }

" -----------------------
" Remaps
" -----------------------

" Leader Remaps
nnoremap <leader><Right> :tabn<CR>
nnoremap <leader><h> :tabn<CR>
nnoremap <leader><Left> :tabp<CR>
nnoremap <leader><l> :tabp<CR>

" Git shortcuts
nnoremap <leader>gb :Telescope git_branches<CR>
nnoremap <leader>gs :Git<CR>
nnoremap <leader>gc :Git commit<CR>
nnoremap <leader>ga :Git add .<CR>
nnoremap <leader>gp :Git push<CR>

nnoremap <leader>g. :GitGutterNextHunk<CR>
nnoremap <leader>g, :GitGutterPrevHunk<CR>
nnoremap <leader>gx :GitGutterUndoHunk<CR>

" Refactorings
nnoremap <leader>rr :CocCommand document.renameCurrentWord<CR>

nnoremap k gk
nnoremap j gj

" Terminal convenience
tnoremap <Esc> <C-\><C-n>

" Alt-Backspace to delete word backwards
inoremap <M-BS> <C-w>

" ctrl alt up/down (Move lines)
nnoremap <C-M-j> :m .+1<CR>==
nnoremap <C-M-k> :m .-2<CR>==
inoremap <C-M-j> <Esc>:m .+1<CR>==gi
inoremap <C-M-k> <Esc>:m .-2<CR>==gi
vnoremap <C-M-j> :m '>+1<CR>gv=gv
vnoremap <C-M-k> :m '<-2<CR>gv=gv

" ctrl shift f (Find in directory)
nnoremap <C-F> <cmd>Telescope live_grep<cr>
vnoremap <C-F> <cmd>Telescope live_grep<cr>

" ctrl p (Find file)
nnoremap <C-p> <cmd>Telescope find_files<CR>
vnoremap <C-p> <cmd>Telescope find_files<CR>

" ctrl c (Find in git status)
nnoremap <C-s> <cmd>Telescope git_status<CR>
vnoremap <C-s> <cmd>Telescope git_status<CR>

" Use yank to copy to clipboard
vnoremap y "*y

" ctrl q (close tab)
nnoremap <C-q> :tabclose<CR>

" ctrl alt h/l (switch tabs)
nnoremap <C-M-h> :tabprevious<CR>
nnoremap <C-M-l> :tabnext<CR>