call plug#begin()

" NERDTree stuff
Plug 'kyazdani42/nvim-web-devicons' " optional, for file icons
Plug 'kyazdani42/nvim-tree.lua'

" neovim lsp plugins and depencencies 
Plug 'neovim/nvim-lspconfig'
Plug 'williamboman/mason.nvim'
Plug 'williamboman/mason-lspconfig.nvim'
Plug 'jose-elias-alvarez/null-ls.nvim'

" various plugins
Plug 'gorbit99/codewindow.nvim'
Plug 'vim-perl/vim-perl', { 'for': 'perl', 'do': 'make clean carp dancer highlight-all-pragmas moose test-more try-tiny' }
Plug 'neoclide/coc.nvim', {'branch': 'release'}
Plug 'preservim/nerdcommenter'
Plug 'mhinz/vim-startify'
Plug 'rmagatti/auto-session'
Plug 'tpope/vim-fugitive'
Plug 'Glench/Vim-Jinja2-Syntax'
Plug 'vmware-archive/salt-vim'
Plug 'vim-airline/vim-airline'
Plug 'vim-airline/vim-airline-themes'
Plug 'honza/vim-snippets'
Plug 'itchyny/vim-cursorword'
Plug 'sheerun/vim-polyglot'

" themes
Plug 'navarasu/onedark.nvim'
Plug 'ellisonleao/gruvbox.nvim'
Plug 'dracula/vim'
Plug 'vigoux/oak'
Plug 'NLKNguyen/papercolor-theme'
Plug 'bluz71/vim-moonfly-colors'

"Fuzzy search by Telescope and its dependencies:
Plug 'nvim-lua/plenary.nvim'
Plug 'nvim-telescope/telescope.nvim', { 'branch': '0.1.x' }
Plug 'BurntSushi/ripgrep'
Plug 'nvim-treesitter/nvim-treesitter', {'do': ':TSUpdate'}

call plug#end()

" load main lua file with additional configs
lua require("general")

" highlight all .conf files as apache config (:])
autocmd BufEnter *.conf :setlocal filetype=apache

"nerdtree bindings
nnoremap <leader>n :NvimTreeFocus<CR>
nnoremap <C-t> :NvimTreeToggle<CR>

" nerdcommenter custom bindings
nmap <C-_> <plug>NERDCommenterToggle
vmap <C-_> <plug>NERDCommenterToggle

" saving with Ctrl+s
"nnoremap <silent><C-s> :update<cr>
"inoremap <silent><C-s> <c-o>:update<cr>
"vnoremap <silent><c-s> <c-c>:update<cr>gv " gv to preserve visual selection

" show uncommited git changes in current part of the code
nnoremap <C-g> :CocCommand git.chunkInfo<CR>

"theme configuration
syntax enable
set termguicolors
let g:onedark_config = {
    \ 'style': 'darker',
\}
let g:PaperColor_Theme_Options = {
  \   'language': {
  \     'python': {
  \       'highlight_builtins' : 1
  \     },
  \     'cpp': {
  \       'highlight_standard_library': 1
  \     },
  \     'c': {
  \       'highlight_builtins' : 1
  \     }
  \   }
  \ }
colorscheme moonfly
let g:airline_theme='dark'

set splitright
set splitbelow


" indent/unindent with tab/shift-tab
nmap <Tab> >>
nmap <S-tab> <<
imap <S-Tab> <Esc><<i
vmap <Tab> >gv
vmap <S-Tab> <gv

" Remap <C-f> and <C-b> for scroll float windows/popups.
if has('nvim-0.4.0') || has('patch-8.2.0750')
  nnoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? coc#float#scroll(1) : "\<C-f>"
  nnoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? coc#float#scroll(0) : "\<C-b>"
  inoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? "\<c-r>=coc#float#scroll(1)\<cr>" : "\<Right>"
  inoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? "\<c-r>=coc#float#scroll(0)\<cr>" : "\<Left>"
  vnoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? coc#float#scroll(1) : "\<C-f>"
  vnoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? coc#float#scroll(0) : "\<C-b>"
endif

" Find files using Telescope command-line sugar.
nnoremap <leader>ff <cmd>Telescope find_files<cr>
nnoremap <leader>fg <cmd>Telescope live_grep<cr>
nnoremap <leader>fb <cmd>Telescope buffers<cr>
nnoremap <leader>fh <cmd>Telescope help_tags<cr>

""""""""""""""""""""""""""""
" config for coc#pum#visible
""""""""""""""""""""""""""""

" Some servers have issues with backup files, see #649.
set nobackup
set nowritebackup

" Having longer updatetime (default is 4000 ms = 4 s) leads to noticeable
" delays and poor user experience.
set updatetime=300

" Always show the signcolumn, otherwise it would shift the text each time
" diagnostics appear/become resolved.
set signcolumn=yes


" Symbol renaming.
nmap <leader>rn <Plug>(coc-rename)

" Formatting selected code.
xmap <leader>ft  <Plug>(coc-format-selected)
nmap <leader>ft  <Plug>(coc-format-selected)

" GoTo code navigation.
nmap <silent> gd <Plug>(coc-definition)
nmap <silent> gy <Plug>(coc-type-definition)
nmap <silent> gi <Plug>(coc-implementation)
nmap <silent> gr <Plug>(coc-references)

" Use tab for trigger completion with characters ahead and navigate.
" NOTE: There's always complete item selected by default, you may want to enable
" no select by `"suggest.noselect": true` in your configuration file.
" NOTE: Use command ':verbose imap <tab>' to make sure tab is not mapped by
" other plugin before putting this into your config.
inoremap <silent><expr> <TAB>
      \ coc#pum#visible() ? coc#pum#next(1) :
      \ CheckBackspace() ? "\<Tab>" :
      \ coc#refresh()
inoremap <expr><S-TAB> coc#pum#visible() ? coc#pum#prev(1) : "\<C-h>"

" Make <CR> to accept selected completion item or notify coc.nvim to format
" <C-g>u breaks current undo, please make your own choice.
inoremap <silent><expr> <CR> coc#pum#visible() ? coc#pum#confirm()
                              \: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"

function! CheckBackspace() abort
  let col = col('.') - 1
  return !col || getline('.')[col - 1]  =~# '\s'
endfunction

" Use <c-space> to trigger completion.
if has('nvim')
  inoremap <silent><expr> <c-space> coc#refresh()
else
  inoremap <silent><expr> <c-@> coc#refresh()
endif


" general configs
set modeline
let g:sls_use_jinja_syntax = 1
set encoding=UTF-8
set showmatch               " show matching 
set ignorecase              " case insensitive 
set mouse=v                 " middle-click paste with 
set hlsearch                " highlight search 
set incsearch               " incremental search
set tabstop=4               " number of columns occupied by a tab 
set softtabstop=4           " see multiple spaces as tabstops so <BS> does the right thing
set expandtab               " converts tabs to white space
set shiftwidth=4            " width for autoindents
set autoindent              " indent a new line the same amount as the line just typed
set number                  " add line numbers
set relativenumber          " add relative line numbers
set wildmode=longest,list   " get bash-like tab completions
set cc=80                   " set an 80 column border for good coding style
filetype plugin indent on   "allow auto-indenting depending on file type
syntax on                   " syntax highlighting
"set mouse=a                " enable mouse click
set clipboard+=unnamedplus  " using system clipboard
filetype plugin on
set cursorline              " highlight current cursorline
set ttyfast                 " Speed up scrolling in Vim
" set spell                 " enable spell check (may need to download language package)
set noswapfile              " disable creating swap file
" set backupdir=~/.cache/vim " Directory to store backup files.