set background=dark
set copyindent
set noexpandtab
set hidden
set ignorecase
set mouse="a"
set number
set relativenumber
set shiftwidth=4
set smartcase
set tabstop=4

syntax enable
set preserveindent
set softtabstop=0
set nowrap
set showcmd
set cursorline
set lazyredraw
set showmatch
set hlsearch

set nobackup
set nowritebackup
set signcolumn=yes
" Milliseconds between updates
set updatetime=300
" Shows non-printing characters
set listchars=tab:→\ ,extends:→,precedes:←,trail:·,eol:¬
set list

""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
""""""""""" coc.nnim configuration """""""""""""""""""""""""""""""""""""
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" https://github.com/neoclide/coc.nvim
" Use tab for trigger completion with characters ahead and navigate.
" NOTE: There's always complete item selected by default, you may want to enable
" no select by `"suggest.noselect": true` in your configuration file.
" 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>
      \ coc#pum#visible() ? coc#pum#next(1) :
      \ CheckBackspace() ? "\<Tab>" :
      \ coc#refresh()
inoremap <expr><S-TAB> coc#pum#visible() ? coc#pum#prev(1) : "\<C-h>"

" Make <CR> to accept selected completion item or notify coc.nvim to format
" <C-g>u breaks current undo, please make your own choice.
inoremap <silent><expr> <CR> coc#pum#visible() ? coc#pum#confirm()
                              \: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"

function! CheckBackspace() 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

" 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 ShowDocumentation()<CR>

function! ShowDocumentation()
  if CocAction('hasProvider', 'hover')
    call CocActionAsync('doHover')
  else
    call feedkeys('K', 'in')
  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)
" Apply AutoFix to problem on the current line.
nmap <leader>qf  <Plug>(coc-fix-current)

" Run the Code Lens action on the current line.
nmap <leader>cl  <Plug>(coc-codelens-action)

" 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 CocActionAsync('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     CocActionAsync('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>
"
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
""""""""""" END coc.nnim configuration """""""""""""""""""""""""""""""""
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""

" Set filetype to the way I want it
let g:nix_recommended_style = 0

" Highlights bad whitespace
autocmd ColorScheme * highlight ExtraWhitespace ctermbg=red guibg=red
autocmd BufWinEnter * match ExtraWhitespace /\s\+$/
autocmd InsertEnter * match ExtraWhitespace /\s\+\%#\@<!$/
autocmd InsertLeave * match ExtraWhitespace /\s\+$/
autocmd BufWinLeave * call clearmatches()

" Settings for CtrlP
set wildignore+=*.swp,*.pyc,*.class,.tox
" Settings for NerdTree
let NERDTreeIgnore = ['\.pyc$', '\.o$', '\.class$']
" indent guides
let g:indent_guides_enable_on_vim_startup = 1
autocmd! BufWritePost .vimrc source $MYVIMRC
" Tell syntastic to use yamllint
let g:syntastic_yaml_checkers = ['yamllint']
let g:syntastic_yaml_yamllint_args = []
let g:syntastic_shell = "${pkgs.bash}/bin/bash"
" Shortcuts for resolving git diff conflicts
let g:diffget_local_map = 'gl'
let g:diffget_upstream_map = 'gu'

" Key mappings
map <F2> <Esc>\be
map <F4> <Esc>:NERDTreeToggle<Cr>
silent !git rev-parse --is-inside-work-tree
if v:shell_error == 0
	map <C-p> :GFiles --cached --others --exclude-standard<CR>
	map <C-o> :GFiles?
else
	map <C-p> :Files<CR>
endif
map <F6> <Esc>:Files<Cr>
" Allows navigating splits
map <C-j> <C-w>j<C-w><Cr>
map <C-k> <C-w>k<C-w><Cr>
map <C-h> <C-w>h<C-w><Cr>
map <C-l> <C-w>l<C-w><Cr>

colorscheme gruvbox

" ============================================================================
" User functions to just make life easier
" ============================================================================
" Toggle absolute line numbers when we don't have focus, and hybrid when
" we do have it
augroup numbertoggle
	autocmd!
	autocmd BufEnter,FocusGained,InsertLeave * set relativenumber
	autocmd BufLeave,FocusLost,InsertEnter	 * set norelativenumber
augroup END
" syntax highlighting for Vagrantfiles
augroup vagrant
	au!
	au BufRead,BufNewFile Vagrantfile set filetype=ruby
augroup END
" Creates the directory for a file if it doesn't already exist.
function! s:MkNonExDir(file, buf)
	if empty(getbufvar(a:buf, '&buftype')) && a:file!~#'\v^\w+\:\/'
		let dir=fnamemodify(a:file, ':h')
		if !isdirectory(dir)
			call mkdir(dir, 'p')
		endif
	endif
endfunction
augroup BWCCreateDir
	autocmd!
	autocmd BufWritePre * :call s:MkNonExDir(expand('<afile>'), +expand('<abuf>'))
augroup END

" Return indent (all whitespace at start of a line), converted from
" tabs to spaces if what = 1, or from spaces to tabs otherwise.
" When converting to tabs, result has no redundant spaces.
function! Indenting(indent, what, cols)
	let spccol = repeat(' ', a:cols)
	let result = substitute(a:indent, spccol, '\t', 'g')
	let result = substitute(result, ' \+\ze\t', ''', 'g')
	if a:what == 1
		let result = substitute(result, '\t', spccol, 'g')
	endif
	return result
endfunction

" Convert whitespace used for indenting (before first non-whitespace).
" what = 0 (convert spaces to tabs), or 1 (convert tabs to spaces).
" cols = string with number of columns per tab, or empty to use 'tabstop'.
" The cursor position is restored, but the cursor will be in a different
" column when the number of characters in the indent of the line is changed.
function! IndentConvert(line1, line2, what, cols)
	let savepos = getpos('.')
	let cols = empty(a:cols) ? &tabstop : a:cols
	execute a:line1 . ',' . a:line2 . 's/^\s\+/\=Indenting(submatch(0), a:what, cols)/e'
	call histdel('search', -1)
	call setpos('.', savepos)
endfunction
command! -nargs=? -range=% Space2Tab call IndentConvert(<line1>,<line2>,0,<q-args>)
command! -nargs=? -range=% Tab2Space call IndentConvert(<line1>,<line2>,1,<q-args>)
command! -nargs=? -range=% RetabIndent call IndentConvert(<line1>,<line2>,&et,<q-args>)


"""""""""
""" Unused, but kept in case I end up on a system where I can't use my preferred plugins
"""""""""



" Base of search is ordered as
" r - searching up from here to the nearest  marker (.git, .hg, .svn, etc)
" a - dir of current file, unless that's a subdirectory of CWD
" c - dir of current file
let g:ctrlp_working_path_mode = 'arc'
let g:ctrlp_switch_buffer = 0
let g:ctrlp_cmd = 'CtrlPMixed'
let g:ctrlp_show_hidden = 1
let g:ctrlp_user_command = {
	\'types': {
		\1: ['.git', '${pkgs.git}/bin/git ls-files --cached --exclude-standard --others' ],
	\},
	\'fallback': '${pkgs.findutils}/bin/find . -type f | ${pkgs.gnugrep}/bin/grep -v -e "\.tox/" -e "\.git/"',
\}
" let g:ctrpl_match_func = { 'match': 'pymatcher#PyMatch' }
" map <F6> <Esc>:CtrlP<Cr>