" la-ninpre init.vim "

" use space as leader key
let mapleader=" "

" enter new era :D
set nocompatible
set encoding=utf-8

" enable 24-bit colors
set termguicolors

" enable hybrid numbers
set nu rnu

" mouse is bad, but sometimes is useful
set mouse=a

" this is for better file searching
set path=.,**
set wildmenu

" more intuitive splits
set splitbelow splitright

" don't highlight everything when search and move cursor to the searched word
set nohlsearch incsearch

set rulerformat=%35(%{strftime('%F\ %H:%M')}%=%l/%L%=%c%V%=%p%%\ %)

" expand tabs to spaces
set tabstop=4 softtabstop=4
set shiftwidth=4
set expandtab

" use autoindents
set smartindent

" replace default behaviour with undotree plugin
set noswapfile nobackup
set undodir=~/.local/share/nvim/undodir
set undofile

" actually, i don't remember what is this...
set hidden

" fix update time
set updatetime=50

" remind yourself about 80 column rule
set colorcolumn=81

" enable insert mode when entering git commit message
autocmd VimEnter */COMMIT_EDITMSG startinsert

" this could be used to show unprintable characters
set listchars=tab:>-,eol:$,space:•,trail:~

" vim plug plugins
call plug#begin('~/.local/share/nvim/plugged')
Plug 'morhetz/gruvbox'
Plug 'junegunn/goyo.vim'
Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
Plug 'junegunn/fzf.vim'
Plug 'mattn/emmet-vim'
Plug 'ap/vim-css-color'
Plug 'preservim/nerdcommenter'
Plug 'tpope/vim-surround'
Plug 'mbbill/undotree'
call plug#end()
filetype plugin indent on

" colorscheme tweaks
let g:gruvbox_contrast_dark = 'hard'
if exists('+termguicolors')
    let &t_8f = "\<Esc>[38;2;%lu;%lu;%lum"
    let &t_8b = "\<Esc>[48;2;%lu;%lu;%lum"
endif
let g:gruvbox_invert_selection='0'
colorscheme gruvbox
set background=dark

"
" mappings
"

" easier navigation in splits
map <C-H> <C-W><C-H>
map <C-L> <C-W><C-L>
map <C-J> <C-W><C-J>
map <C-K> <C-W><C-K>

" replace all occurencies of the word under the cursor
nnoremap <leader>su :%s/\<<C-r><C-w>\>/

" show or hide undo tree
nnoremap <leader>u :UndotreeToggle<CR>

" open helptags
nnoremap <leader>h :Helptags<CR>

" open file with fzf
nnoremap <leader>o :Files<CR>

" easy source init.vim
nnoremap <leader><CR> :so ~/.config/nvim/init.vim<CR>
" easy open init.vim
nnoremap <leader>vc :e ~/.config/nvim/init.vim<CR>

" show or hide unprintable characters
nnoremap <leader>sl :set list<CR>
nnoremap <leader>sn :set nolist<CR>
nnoremap <leader>go :Goyo<CR>

" actually magick!
" this moves higlighted block up or down
vnoremap J :m '>+1<CR>gv=gv
vnoremap K :m '<-2<CR>gv=gv

" alias for capturing group in command mode (for use with regexps)
cmap ;( \(\)<Left><Left>

" highlight yanked text
" i consider this as transition from visually selecting stuff and yanking it
" to just yank text object without selecting it
augroup highlight_yank
    autocmd!
    autocmd TextYankPost * silent! lua require'vim.highlight'.on_yank({timeout = 40})
augroup END