" ----------------------------------------------------------------------------
" vundle essentials
" ----------------------------------------------------------------------------

set nocompatible
filetype off

" set the runtime path to include Vundle and initialize
set rtp+=~/.vim/bundle/Vundle.vim

call vundle#begin()

" let vundle manage vundle...
Plugin 'VundleVim/Vundle.vim'

" Basic plugins
Plugin 'jiangmiao/auto-pairs'
Plugin 'preservim/nerdtree'
Plugin 'jeetsukumaran/vim-buffergator'

" IDE like plugins
Plugin 'prabirshrestha/asyncomplete.vim'
Plugin 'prabirshrestha/vim-lsp'
Plugin 'prabirshrestha/asyncomplete-lsp.vim'
Plugin 'mattn/vim-lsp-settings'
"Plugin 'yami-beta/asyncomplete-omni.vim'
Plugin 'prabirshrestha/asyncomplete-file.vim'

" Language autocomplete for English
Plugin 'htlsne/asyncomplete-look'

" an additional colorscheme I like
Plugin 'altercation/vim-colors-solarized'

let _plugins_list = _vimrc_dir . "/" . $USER . "_plugins.list"
if filereadable(_plugins_list)
	"echomsg "found user plugins " . _plugins_list
	execute 'source '.fnameescape(_plugins_list)
endif

call vundle#end()

filetype plugin indent on

" ----------------------------------------------------------------------------
" plugin configuration
" ----------------------------------------------------------------------------

" NERDTree
" --------

" map a keyboard shortcut to show and hide NERDTree
nnoremap <C-t> :NERDTreeToggle<CR>

" Exit Vim if NERDTree is the only window remaining in the only tab.
autocmd BufEnter * if tabpagenr('$') == 1 && winnr('$') == 1 && exists('b:NERDTree') && b:NERDTree.isTabTree() | quit | endif

" vim-lsp
" -------

" general vim-lsp settings
" ------------------------

" maps quite q few keyboad shortcuts
" this is taken staight off the github page with one added shortcut to peak at
" the definition of a function or class
function! s:on_lsp_buffer_enabled() abort
	setlocal omnifunc=lsp#complete
    "setlocal signcolumn=no " messes with some autocomplete!
    if exists('+tagfunc') | setlocal tagfunc=lsp#tagfunc | endif
    nmap <buffer> gd <plug>(lsp-definition)
    nmap <buffer> gpd <plug>(lsp-peek-definition)
    nmap <buffer> gs <plug>(lsp-document-symbol-search)
    nmap <buffer> gS <plug>(lsp-workspace-symbol-search)
    nmap <buffer> gr <plug>(lsp-references)
    nmap <buffer> gi <plug>(lsp-implementation)
    nmap <buffer> gt <plug>(lsp-type-definition)
    nmap <buffer> <leader>rn <plug>(lsp-rename)
    nmap <buffer> [g <plug>(lsp-previous-diagnostic)
    nmap <buffer> ]g <plug>(lsp-next-diagnostic)
    nmap <buffer> K <plug>(lsp-hover)
    inoremap <buffer> <expr><c-f> lsp#scroll(+4)
    inoremap <buffer> <expr><c-d> lsp#scroll(-4)

    let g:lsp_format_sync_timeout = 2000
    autocmd! BufWritePre *.rs,*.go call execute('LspDocumentFormatSync')
endfunction

augroup lsp_install
    au!
    " call s:on_lsp_buffer_enabled only for languages that has the server registered.
    autocmd User lsp_buffer_enabled call s:on_lsp_buffer_enabled()
augroup END

" asyncomplete
" ------------

" make tab complete work
inoremap <expr> <Tab>   pumvisible() ? "\<C-n>" : "\<Tab>"
inoremap <expr> <S-Tab> pumvisible() ? "\<C-p>" : "\<S-Tab>"
inoremap <expr> <cr>    pumvisible() ? asyncomplete#close_popup() : "\<cr>"

" force refresh with CTRL-SPACE
imap <c-@> <Plug>(asyncomplete_force_refresh)

" asyncomplete-file
" -----------------

au User asyncomplete_setup call asyncomplete#register_source(asyncomplete#sources#file#get_source_options({
	\ 'name': 'file',
    \ 'allowlist': ['*'],
    \ 'priority': 10,
    \ 'completor': function('asyncomplete#sources#file#completor')
    \ }))

" asyncomplete-omni
" -----------------

"autocmd User asyncomplete_setup call asyncomplete#register_source(asyncomplete#sources#omni#get_source_options({
"	\ 'name': 'omni',
"	\ 'allowlist': ['*'],
"	\ 'blocklist': ['c', 'cpp', 'html'],
"	\ 'completor': function('asyncomplete#sources#omni#completor'),
"	\ 'config': {
"	\   'show_source_kind': 1,
"	\ },
"	\ }))

" asyncomplete-look
" -----------------

au User asyncomplete_setup call asyncomplete#register_source({
	\ 'name': 'look',
    \ 'allowlist': ['text', 'markdown'],
    \ 'completor': function('asyncomplete#sources#look#completor'),
    \ })

" source the additional config

let _plugins_list = _vimrc_dir . "/" . $USER . "_plugins.vimrc"
if filereadable(_plugins_list)
	"echomsg "found user plugin configuration " . _plugins_list
	execute 'source '.fnameescape(_plugins_list)
endif