" Keybinds ##########################################################################
" Set leader key
let mapleader = "\<Space>"
" Disable arrow keys
noremap  <Up> ""
noremap! <Up> <Esc>
noremap  <Down> ""
noremap! <Down> <Esc>
noremap  <Left> ""
noremap! <Left> <Esc>
noremap  <Right> ""
noremap! <Right> <Esc>
" Stop highlighting search result when pressing Return
nnoremap <silent> <CR> :nohlsearch<CR><CR>

" Indentation jump
" https://vim.fandom.com/wiki/Move_to_next/previous_line_with_same_indentation
noremap <silent> <C-k> :call search('^'. matchstr(getline('.'), '\(^\s*\)') .'\%<' . line('.') . 'l\S', 'be')<CR>
noremap <silent> <C-j> :call search('^'. matchstr(getline('.'), '\(^\s*\)') .'\%>' . line('.') . 'l\S', 'e')<CR>

" Split view navigation
nnoremap <leader>h <C-w><C-h>
nnoremap <leader>j <C-w><C-j>
nnoremap <leader>k <C-w><C-k>
nnoremap <leader>l <C-w><C-l>

" Settings ##########################################################################
" hybrid linenumbers
set number relativenumber
" no timeout when exiting insert-mode (see https://www.johnhawthorn.com/2012/09/vi-escape-delays/)
set timeoutlen=1000 ttimeoutlen=0
" smart case insensitive search (insens: /copy /Copy\c; sens: /Copy /copy\C)
set ignorecase smartcase
" Tab size
set tabstop=4
" Shift the same amount as tabstop
set shiftwidth=0
" Highlight current line
set cursorline
" Automatically add leading comment (when pressing o/O or enter in Insert)
set formatoptions+=cro
" see :help persistent-undo
set undofile

" Aesthetics #######################################################################
" use onedark as theme for syntax highlighting
syntax on
colorscheme onedark
" Use 24-bit (true-color) mode
if (has("termguicolors"))
	set termguicolors
endif

" get transparent background of the terminal back
" (at least in nvim, i can't get it to work in vanilla)
if (has('nvim'))
	highlight Normal guibg=NONE
	highlight NonText guibg=NONE
endif

" zshOption is a huge regex that leads to massive lags when scrolling
" Be sure to disable it after activating syntax highlighting
autocmd filetype zsh syntax clear zshOption

" change cursor shape depending on mode
if (has('nvim'))
	" Beam when exiting
	autocmd VimLeave * silent !echo -ne "\e[5 q"
else
	" https://vim.fandom.com/wiki/Change_cursor_shape_in_different_modes
	" https://github.com/tmux/tmux/issues/1593
	if exists('$TMUX')
		" Start insert mode - vertical bar/beam
		let &t_SI = "\ePtmux;\e\e[5 q\e\\"
		" Start replace mode - horizontal bar/underline
		let &t_SR = "\ePtmux;\e\e[3 q\e\\"
		" End insert or replace mode - block
		let &t_EI = "\ePtmux;\e\e[1 q\e\\"

		" Block when entering
		autocmd VimEnter * silent !echo -ne "\ePtmux;\e\e[1 q\e\\"
		" Beam when exiting
		autocmd VimLeave * silent !echo -ne "\ePtmux;\e\e[5 q\e\\"
	else
		" Start insert mode - vertical bar/beam
		let &t_SI = "\e[5 q"
		" Start replace mode - horizontal bar/underline
		let &t_SR = "\e[3 q"
		" End insert or replace mode - block
		let &t_EI = "\e[1 q"

		" Block when entering
		autocmd VimEnter * silent !echo -ne "\e[1 q"
		" Beam when exiting
		autocmd VimLeave * silent !echo -ne "\e[5 q"
	endif
endif

" Highlight trailing whitespaces
" (https://vim.fandom.com/wiki/Highlight_unwanted_spaces)
" Create highlight group
highlight ExtraWhitespace ctermbg=red guibg=red
" Associate with patter (trailing whitespaces)
match ExtraWhitespace /\s\+$/
" apply not only to the first window
autocmd BufWinEnter * match ExtraWhitespace /\s\+$/
" Do not match when typing at the end of a line
autocmd InsertEnter * match ExtraWhitespace /\s\+\%#\@<!$/
" Reset when leaving insert mode
autocmd InsertLeave * match ExtraWhitespace /\s\+$/
" Clear all matches
autocmd BufWinLeave * call clearmatches()

" Show ruler at 80 and 100 columns
set colorcolumn=80,100
" Shorter lines in git commits
autocmd filetype gitcommit set colorcolumn=50,72
" Spell checking in git commits
autocmd filetype gitcommit set spell spelllang=en_us