" Sane vim defaults for ArchLabs

scriptencoding utf8

" Arch defaults
runtime! archlinux.vim

" leader key
let g:mapleader = "\<Space>"

" system clipboard (requires +clipboard)
set clipboard^=unnamed,unnamedplus

" additional settings
syntax enable
set number             " enable line numbers
set backup             " create backup files in runtimepath/backup/
set undofile           " persistent undo files in runtimepath/undo/
set modeline           " enable vim modelines
set hlsearch           " highlight search items
set incsearch          " searches are performed as you type
set confirm            " ask confirmation like save before quit.
set tabstop=4          " tab is equivalent to how many spaces
set softtabstop=4      " tab is equivalent to how many spaces
set shiftwidth=4       " amount of spaces for indentation
set shortmess+=aAcws   " hide or shorten certain messages
set wildmenu           " tab completion menu when using command mode
set wildignore+=*~,*.pyc,*/.git/*,*.so,*.swp,*.o,*.zip,*.zwc,*.png,*.jpg
set ttimeout
set ttimeoutlen=10
set timeoutlen=600
set updatecount=80
set linebreak breakindent
set list listchars=tab:>>,trail:~
set mouse=niv " use the terminal mouse in command mode (:)
if has('mouse_sgr')
	" sgr mouse is better but not every term supports it
	set ttymouse=sgr
endif

let g:netrw_altv = 1
let g:netrw_liststyle = 3
let g:netrw_browse_split = 3

if $TERM !=? 'linux'
	set termguicolors
	" true colors in terminals (neovim doesn't need this)
	if !has('nvim') && !($TERM =~? 'xterm' || &term =~? 'xterm')
		let $TERM = 'xterm-256color'
		let &term = 'xterm-256color'
	endif
	if has('multi_byte') && $TERM !=? 'linux'
		" ▏│ ┆ ┃ › »»
		set list listchars=tab:▏\ ,extends:❯,precedes:❮
		set fillchars=vert:┃ showbreak=↪
	endif
endif

" set the colorscheme variant.. midnight, night, or day
let g:jinx_theme = 'midnight'
try
	colorscheme jinx
catch
	colorscheme evening
endtry

" change cursor shape for different editing modes, neovim does this by default
if !has('nvim')
	if exists('$TMUX')
		let &t_SI = "\<Esc>Ptmux;\<Esc>\e[5 q\<Esc>\\"
		let &t_SR = "\<Esc>Ptmux;\<Esc>\e[4 q\<Esc>\\"
		let &t_EI = "\<Esc>Ptmux;\<Esc>\e[2 q\<Esc>\\"
	elseif $TERM ==# 'linux'
		let &t_SI = "\e[?0c"
		let &t_EI = "\e[?8c"
	else
		let &t_SI = "\e[6 q"
		let &t_SR = "\e[4 q"
		let &t_EI = "\e[2 q"
	endif
endif

" ------ commands ------

command! D Explore
command! R call <SID>ranger()
command! -bang -complete=buffer -nargs=? Bclose call Bclose(<bang>, <args>)
command! -complete=buffer -nargs=? Bselect call Bselect(<args>)
command! W exec 'silent w !sudo tee % >/dev/null'|edit!

" ------ basic maps ------

" visually select the whole file
vnoremap aa VGo1G

" yank the entire file
nnoremap gyy gg"+yG''
vnoremap gyy <Esc>gg"+yG''

" open ranger as a file chooser using the function below
nnoremap <leader>r :call <SID>ranger()<CR>

" select buffer from a list
nnoremap <Leader>b :Bselect<CR>

" close current buffer (and tab if needed)
nnoremap <Leader>q :Bclose<CR>:silent tabclose<CR>gT

" change windows with ctrl+(hjkl)
nnoremap <C-J> <C-W><C-J>
nnoremap <C-K> <C-W><C-K>
nnoremap <C-L> <C-W><C-L>
nnoremap <C-H> <C-W><C-H>

" alt defaults
nnoremap 0 ^
nnoremap Y y$
nnoremap n nzzzv
nnoremap N Nzzzv
nnoremap <Tab> ==1j
vnoremap <Tab> ==

" re-visual text after changing indent
vnoremap > >gv
vnoremap < <gv

" toggle line numbers, nn (no number)
nnoremap <silent> <Leader>nn :set number!

" gj/k but preserve numbered jumps ie: 12j or 45k
nmap <buffer><silent><expr>j v:count ? 'j' : 'gj'
nmap <buffer><silent><expr>k v:count ? 'k' : 'gk'

" open a terminal in $PWD
nnoremap <silent> <Leader>tt :terminal<CR>

" toggle folding
nnoremap <leader>za :set foldenable!<CR>

" tab control
nnoremap <silent> <M-j> :tabmove -1<CR>
nnoremap <silent> <M-k> :tabmove +1<CR>
nnoremap <silent> <Leader>te :tabnew<CR>
nnoremap <silent> <Leader>tn :tabnext<CR>
nnoremap <silent> <Leader>tf :tabfirst<CR>
nnoremap <silent> <Leader>tp :tabprevious<CR>

" open a new tab in the current directory with netrw (file browser)
nnoremap <silent> <Leader>- :tabedit <C-R>=expand("%:p:h")<CR><CR>

" fix syntax highlighting issues
nnoremap U :syntax sync fromstart<CR>:redraw!<CR>


" ------ autocmd ------

" when quitting a file save the cursor position and reload if file changed
augroup load_changed_file
	autocmd!
	autocmd BufReadPost * call setpos(".", getpos("'\""))
	autocmd FocusGained,BufEnter * if mode() !=? 'c' | checktime | endif
	autocmd FileChangedShellPost * echo "Changes loaded from source file"
augroup END

" make the built-in terminal behave a bit better
if has('nvim')
	augroup open_terminal
		autocmd!
		autocmd TermOpen * setlocal nonumber norelativenumber modifiable | startinsert
		autocmd TermClose * buffer #
	augroup END
elseif has('terminal')
	augroup open_terminal
		autocmd!
		autocmd TerminalOpen * setlocal nonumber norelativenumber
	augroup END
endif

" when not running in a linux console toggle some things when in insert mode
if $TERM !=# 'linux'
	augroup active_cursorline
		autocmd!
		autocmd InsertEnter * setlocal cursorline listchars-=trail:•
		autocmd InsertLeave * setlocal nocursorline listchars+=trail:•
	augroup END
else
	" otherwise disable cursorline
	set nocursorline
endif

" ------ adv maps ------


" strip trailing whitespace, ss (strip space)
nnoremap <silent> <Leader>ss
			\ :let b:_p = getpos(".") <Bar>
			\  let b:_s = (@/ != '') ? @/ : '' <Bar>
			\  %s/\s\+$//e <Bar>
			\  let @/ = b:_s <Bar>
			\  nohlsearch <Bar>
			\  unlet b:_s <Bar>
			\  call setpos('.', b:_p) <Bar>
			\  unlet b:_p <CR>

" global replace
vnoremap <Leader>sw "hy
			\ :let b:sub = input('global replacement: ') <Bar>
			\ if b:sub !=? '' <Bar>
			\   let b:rep = substitute(getreg('h'), '/', '\\/', 'g') <Bar>
			\   execute '%s/'.b:rep."/".b:sub.'/g' <Bar>
			\   unlet b:sub b:rep <Bar>
			\ endif <CR>
nnoremap <Leader>sw
			\ :let b:sub = input('global replacement: ') <Bar>
			\ if b:sub !=? '' <Bar>
			\   execute "%s/<C-r><C-w>/".b:sub.'/g' <Bar>
			\   unlet b:sub <Bar>
			\ endif <CR>

" prompt before each replace
vnoremap <Leader>cw "hy
			\ :let b:sub = input('interactive replacement: ') <Bar>
			\ if b:sub !=? '' <Bar>
			\   let b:rep = substitute(getreg('h'), '/', '\\/', 'g') <Bar>
			\   execute '%s/'.b:rep.'/'.b:sub.'/gc' <Bar>
			\   unlet b:sub b:rep <Bar>
			\ endif <CR>

nnoremap <Leader>cw
			\ :let b:sub = input('interactive replacement: ') <Bar>
			\ if b:sub !=? '' <Bar>
			\   execute "%s/<C-r><C-w>/".b:sub.'/gc' <Bar>
			\   unlet b:sub <Bar>
			\ endif <CR>

" highlight long lines, ll (long lines)
let w:longlines = matchadd('ColorColumn', '\%'.&textwidth.'v', &textwidth)
nnoremap <silent> <Leader>ll
			\ :if exists('w:longlines') <Bar>
			\   silent! call matchdelete(w:longlines) <Bar>
			\   echo 'Long line highlighting disabled'
			\   <Bar> unlet w:longlines <Bar>
			\ elseif &textwidth > 0 <Bar>
			\   let w:longlines = matchadd('ColorColumn', '\%'.&textwidth.'v', &textwidth) <Bar>
			\   echo 'Long line highlighting enabled'
			\ <Bar> else <Bar>
			\   let w:longlines = matchadd('ColorColumn', '\%80v', 81) <Bar>
			\   echo 'Long line highlighting enabled'
			\ <Bar> endif <CR>

" local keyword jump
nnoremap <Leader>fw
			\ [I:let b:jump = input('Go To: ') <Bar>
			\ if b:jump !=? '' <Bar>
			\   execute "normal! ".b:jump."[\t" <Bar>
			\   unlet b:jump <Bar>
			\ endif <CR>


function! Bclose(bang, buffer) abort
	if empty(a:buffer)
		let l:target = bufnr('%')
	elseif a:buffer =~? '^\d\+$'
		let l:target = bufnr(str2nr(a:buffer))
	else
		let l:target = bufnr(a:buffer)
	endif

	if l:target < 0
		call WarningMsg('No matching buffer for '.a:buffer)
		return
	endif

	if empty(a:bang) && getbufvar(l:target, '&modified')
		call WarningMsg('No write since last change for buffer '.l:target.' (use :Bclose!)')
		return
	endif

	" Numbers of windows that view target buffer which we will delete.
	let l:num_wins = filter(range(1, winnr('$')), 'winbufnr(v:val) == l:target')

	if empty(a:bang) && len(l:num_wins) > 1
		call WarningMsg('Buffer is open in multiple windows (use :Bclose!)')
		return
	endif

	let l:cur_win = winnr()

	for w in l:num_wins
		execute w.'wincmd w'
		let prevbuf = bufnr('#')
		if prevbuf > 0 && buflisted(prevbuf) && prevbuf != w
			buffer #
		else
			bprevious
		endif
		if l:target == bufnr('%')
			" Numbers of listed buffers which are not the target to be deleted.
			let blisted = filter(range(1, bufnr('$')), 'buflisted(v:val) && v:val != l:target')
			" Listed, not target, and not displayed.
			let bhidden = filter(copy(blisted), 'bufwinnr(v:val) < 0')
			" Take the first buffer, if any (could be more intelligent).
			let bjump = (bhidden + blisted + [-1])[0]
			if bjump > 0
				execute 'buffer '.bjump
			else
				execute 'enew'.a:bang
			endif
		endif
	endfor

	execute 'bdelete'.a:bang.' '.l:target
	execute l:cur_win.'wincmd w'
endfunction

function! Bselect(...) abort
	let l:pattern = a:0 >= 1 ? a:1 : ''
	if l:pattern ==? ''
		let l:pattern = input('String match: ')
		redraw!
	endif
	if l:pattern !=# ''
		let l:bufcount = bufnr('$')
		let l:currbufnr = 1
		let l:nummatches = 0
		let l:matchingbufnr = 0

		while l:currbufnr <= l:bufcount
			if bufexists(l:currbufnr)
				let l:currbufname = bufname(l:currbufnr)
				if (match(l:currbufname, l:pattern) > -1)
					echo l:currbufnr . ': ' . l:currbufname
					let l:nummatches += 1
					let l:matchingbufnr = l:currbufnr
				endif
			endif
			let l:currbufnr += 1
		endwhile

		if (l:nummatches == 1)
			execute ':buffer '.l:matchingbufnr
		elseif (l:nummatches > 1)
			let l:desiredbufnr = input('Enter buffer number: ')
			if (strlen(l:desiredbufnr) != 0)
				execute ':buffer ' . l:desiredbufnr
			endif
		else
			call WarningMsg('No matching buffers')
		endif
	endif
endfunction

function! <SID>ranger()
	let l:temp = tempname()
	execute 'silent !xterm -e ranger --choosefiles='.shellescape(l:temp).' $PWD'
	if !filereadable(temp)
		redraw!
		return
	endif
	let l:names = readfile(l:temp)
	if empty(l:names)
		redraw!
		return
	endif
	execute 'edit '.fnameescape(l:names[0])
	for l:name in l:names[1:]
		execute 'argadd '.fnameescape(l:name)
	endfor
	redraw!
endfunction