"" Manage plugins using vim-plug
if ! filereadable((isdirectory($XDG_CONFIG_HOME) ? $XDG_CONFIG_HOME : "./config") . "/nvim/autoload/plug.vim")
	echo "Downloading junegunn/vim-plug to manage plugins..."
	silent !mkdir -p ${XDG_CONFIG_HOME:-$HOME/.config}/nvim/autoload/
	silent !curl "https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim" > ${XDG_CONFIG_HOME:-$HOME/.config}/nvim/autoload/plug.vim
	autocmd VimEnter * PlugInstall
endif

call plug#begin((isdirectory($XDG_DATA_HOME) ? $XDG_DATA_HOME : ".local/share") . "/vim-plug")
Plug 'alvan/vim-closetag'
Plug 'ap/vim-css-color'
Plug 'junegunn/goyo.vim'
Plug 'vimwiki/vimwiki'
Plug 'tpope/vim-commentary'
Plug 'hrsh7th/nvim-cmp'                  " The completion plugin
Plug 'hrsh7th/cmp-buffer'                " buffer completions
Plug 'hrsh7th/cmp-path'                  " path completions
Plug 'hrsh7th/cmp-cmdline'               " cmdline completions
Plug 'hrsh7th/cmp-nvim-lsp'
Plug 'saadparwaiz1/cmp_luasnip'          " snippet completions
Plug 'L3MON4D3/LuaSnip'                  " snippet engine
Plug 'rafamadriz/friendly-snippets'      " a bunch of snippets to use
Plug 'neovim/nvim-lspconfig'             " enable LSP
Plug 'williamboman/mason.nvim'           " simple to use language server installer
Plug 'williamboman/mason-lspconfig.nvim' " simple to use language server installer
call plug#end()

" lua require('user.cmp')
" lua require('user.lsp')

"" Basic options
set autochdir                  " Always change directory to current file
set autoindent                 " Keeps indentation on new lines
set hlsearch                   " Highlight search hits
set ignorecase                 " Case-insensitive search...
set linebreak                  " Word wrap
set list                       " Show whitespace characters defined in listchars
set listchars=tab:▏\ \,space:· " Highlight tabs and spaces
set mouse=a                    " Because sometimes it's just easier to use the mouse
set number relativenumber	   " Enable relative line numbers
set smartcase                  " ...Unless the search term is capital
set splitbelow splitright	   " Open splits on bottom/right instead of top/left
set termguicolors              " Enable GUI colors for the terminal to get truecolor
set wildmode=longest,list,full " Enable file auto-complete
set wrap!                      " Disable word wrapping
syntax on                      " Enable syntax highlighting

" Get rid of the pointless .viminfo files that clutter the home directory
let skip_defaults_vim=1
set viminfo=""

" Disables automatic commenting on newline:
autocmd FileType * setlocal formatoptions-=c formatoptions-=r formatoptions-=o

" Tabbing
"let tabwidth = 4
set tabstop=4                  " Set width of tabs to 4 instead of default 8
set shiftwidth=4               " Tab key will only insert 1 tab
" Use tabs instead of spaces
autocmd FileType sass setlocal noet ci pi sts=0 sw=4 ts=4

"" Plugin options
" Closetag
let g:closetag_filenames = '*.html,*.xhtml,*.phtml'
" VimWiki
let g:vimwiki_list = [{'path': '~/docs/school/arc/docs/wiki/', 'path_html': '~/docs/school/arc/docs/wiki/site/'}]

" Filetype options
autocmd BufRead,BufNewFile *.tex set filetype=tex
au Filetype tex let b:autopairs_enabled = 0
au Filetype tex setlocal indentexpr=
au BufRead,BufNewFile *.tssg set filetype=tssg

"" Keybindings
" Set leader-key to comma
let mapleader =","
" Invoke goyo with comma-m
nmap <leader>m :Goyo 120x<CR>
" Invoke spellcheck mode with comma-l
nmap <leader>l :setlocal spell! spelllang=en_us<CR>
" Set cursorcolumn with comma-c
nmap <leader>c :set cursorcolumn!<CR>
" Navigate faster than hjkl with ctrl-hjlk
nmap <C-h> zh
nmap <C-j> <C-e>
nmap <C-k> <C-y>
nmap <C-l> zl
" Faster split navigation (leader-wasd, as opposed to ctrl-w + hjlk)
map <leader>a <C-w>h
map <leader>s <C-w>j
map <leader>w <C-w>k
map <leader>d <C-w>l
" Keys for tab navigation
nmap <leader><TAB> gt
nmap <leader>t :tabnew<CR>
nmap <C-T> :tabnew<CR>
" Copy and cut with standard bindings
map <C-c> "+y
map <C-x> "+x
" Unmap Ex mode
map Q <NOP>
" Perform dot commands over visual blocks:
vnoremap . :normal .<CR>
" Save file as sudo on files that require root permission
cnoremap w!! execute 'silent! write !doas tee % >/dev/null' <bar> edit!
" Camel case every word on the line
"nmap gcc :s/\v<(.)(\w*)/\u\1\L\2/g<CR>
"nmap gCC :%s/\v<(.)(\w*)/\u\1\L\2/g<CR>
" HTML shortcuts
nmap gwp I<p><ESC>l4xA</p><ESC>
nmap gwh1 I<h1><ESC>l5xA</h1><ESC>
nmap gwh2 I<h2><ESC>l5xA</h2><ESC>
nmap gwh3 I<h3><ESC>l5xA</h3><ESC>

"" Extra functionality
" Colorscheme for root and normal users (since vimrc is just symlinked to the root user's home)
if ($USER) == 'root'
	colorscheme koehler
else
"	if empty($DISPLAY)
"		colorscheme koehler
"	else
		set bg=dark
		let g:gruvbox_contrast_dark = 'hard'
		colorscheme gruvbox-timmy
"	endif
endif

" Functions for changing the terminal emulator's class name to 'Vim'
function GetTermPID(temu)
	let pinfo = ['', getpid(), '']
	while !(pinfo[2] =~ a:temu || pinfo[1] == '0')
		let pinfo = split(system('ps h -o pid,ppid,command= -p' . pinfo[1]))
	endwhile
	return pinfo[0]
endfunction

function SetTermClassName(termpid, name)
	" Command chaining in xdotool doesn't work here for some reason
	silent exec "!xdotool set_window --class " . a:name . " $(xdotool search --pid " . a:termpid . ")"
endfunction

" Behaviors exclusive to either a tty or a graphical terminal emulator
if empty($DISPLAY)
	" Clear the tty screen after exiting vim
	autocmd VimLeave * :clear
else
	" Highlight current line
	set cursorline
	" Change window title
	autocmd BufEnter * :set title
	let &titleold="st"
	" Change class name
	let temu = "st"
	let temupid = GetTermPID(temu)
	if (temupid != 1)
		autocmd VimEnter * call SetTermClassName(temupid, "Vim")
		autocmd VimLeave * call SetTermClassName(temupid, temu)
	endif
endif

" Automatically deletes all trailing whitespace on save
function DelWS()
	let l:save_view = winsaveview()
	:%s/\s*$//e
	call winrestview(l:save_view)
endfunction
autocmd BufWritePre * call DelWS()


" vim -b : edit binary using xxd-format!
augroup Binary
  au!
  au BufReadPre  *.bin let &bin=1
  au BufReadPost *.bin if &bin | %!xxd
  au BufReadPost *.bin set ft=xxd | endif
  au BufWritePre *.bin if &bin | %!xxd -r
  au BufWritePre *.bin endif
  au BufWritePost *.bin if &bin | %!xxd
  au BufWritePost *.bin set nomod | endif
augroup END

"" Auto compile
" Sass
"autocmd BufWritePost [^_]*.sass,[^_]*.scss silent !sass %:p %:p:r.css