" install vim-plug
let data_dir = has('nvim') ? stdpath('data') . '/site' : '~/.vim'
if empty(glob(data_dir . '/autoload/plug.vim'))
    silent execute '!curl -fLo '.data_dir.'/autoload/plug.vim --create-dirs  https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim'
    autocmd VimEnter * PlugInstall --sync | source $MYVIMRC
endif

" setup plugins
call plug#begin()
    Plug 'preservim/nerdtree'
    Plug 'ryanoasis/vim-devicons'
    Plug 'vim-airline/vim-airline'
    Plug 'vim-airline/vim-airline-themes'
    Plug 'prabirshrestha/vim-lsp'
    Plug 'mattn/vim-lsp-settings'
    Plug 'prabirshrestha/asyncomplete.vim'
    Plug 'prabirshrestha/asyncomplete-lsp.vim'
call plug#end()

" general settings
syntax on
set tabstop=4
set shiftwidth=4
set expandtab
set number relativenumber

" required for vim-devicons to work properly
set encoding=UTF-8

" vim-airline settings
let g:airline_theme='papercolor'

" NERDTree settings
let g:NERDTreeShowHidden=1
nnoremap <C-t> :NERDTreeToggle<CR>

" set up vim-lsp
let g:lsp_diagnostics_echo_cursor = 1

" set up vim-lsp-settings 
let g:lsp_settings= {
\	'clangd': {
\ 		'cmd': ['/opt/homebrew/Cellar/llvm/19.1.6/bin/clangd'],
\	}
\}

" set up autocomplete tabing 
inoremap <expr> <Tab>   pumvisible() ? "\<C-n>" : "\<Tab>"
inoremap <expr> <S-Tab> pumvisible() ? "\<C-p>" : "\<S-Tab>"
inoremap <expr> <cr>    pumvisible() ? asyncomplete#close_popup() : "\<cr>"

" set up automatic braces
inoremap { {<CR>}<Esc>ko
inoremap ( ()<Esc>i
inoremap [ []<Esc>i
inoremap " ""<Esc>i

" set up bracketed paste
if !has('gui_running') && &term =~ '^\%(screen\|tmux\)'
    " Better mouse support, see  :help 'ttymouse'
    set ttymouse=sgr

    " Enable true colors, see  :help xterm-true-color
    let &termguicolors = v:true
    let &t_8f = "\<Esc>[38;2;%lu;%lu;%lum"
    let &t_8b = "\<Esc>[48;2;%lu;%lu;%lum"

    " Enable bracketed paste mode, see  :help xterm-bracketed-paste
    let &t_BE = "\<Esc>[?2004h"
    let &t_BD = "\<Esc>[?2004l"
    let &t_PS = "\<Esc>[200~"
    let &t_PE = "\<Esc>[201~"

    " Enable focus event tracking, see  :help xterm-focus-event
    let &t_fe = "\<Esc>[?1004h"
    let &t_fd = "\<Esc>[?1004l"
    execute "set <FocusGained>=\<Esc>[I"
    execute "set <FocusLost>=\<Esc>[O"

    " Enable modified arrow keys, see  :help arrow_modifiers
    execute "silent! set <xUp>=\<Esc>[@;*A"
    execute "silent! set <xDown>=\<Esc>[@;*B"
    execute "silent! set <xRight>=\<Esc>[@;*C"
    execute "silent! set <xLeft>=\<Esc>[@;*D"
endif