let mapleader =","

if ! filereadable(expand('~/.config/nvim/autoload/plug.vim'))
    echo "Downloading junegunn/vim-plug to manage plugins..."
    silent !mkdir -p ~/.config/nvim/autoload/
    silent !curl "https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim" > ~/.config/nvim/autoload/plug.vim
endif

call plug#begin()
Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }     " FZF integration
Plug 'junegunn/fzf.vim'                 " FZF integration
Plug 'ap/vim-css-color'                 " highlight css colour codes with that color
Plug 'vim-airline/vim-airline'          " status bar
Plug 'vim-airline/vim-airline-themes'   " status bar themes
Plug 'tpope/vim-surround'               " highlight open/close characters like [], {}, ()
Plug 'cespare/vim-toml'					" toml syntax highlighting
Plug 'edkolev/tmuxline.vim'             " apply vim statusbar theme to tmux
Plug 'christoomey/vim-tmux-navigator'   " Tmux integration
" Plug 'chriskempson/base16-vim'        " base16 color schemes
" Plug 'morhetz/gruvbox'                  " gruvbox theme
Plug 'rhysd/vim-grammarous'				" LanguageTool integration
Plug 'vim-syntastic/syntastic'			" syntax checking for various languages
Plug 'godlygeek/tabular'                " required for aligning tables with next plugin
Plug 'wakatime/vim-wakatime'            " Aggregate editor stats and metrics
Plug 'fatih/vim-go', { 'do': ':GoUpdateBinaries' }
Plug 'nvim-treesitter/nvim-treesitter', {'do': ':TSUpdate'}
call plug#end()

lua <<EOF
require'nvim-treesitter.configs'.setup {
  highlight = {
    enable = true,
    custom_captures = {
      -- Highlight the @foo.bar capture group with the "Identifier" highlight group.
      ["foo.bar"] = "Identifier",
    },
    -- Setting this to true will run `:h syntax` and tree-sitter at the same time.
    -- Set this to `true` if you depend on 'syntax' being enabled (like for indentation).
    -- Using this option may slow down your editor, and you may see some duplicate highlights.
    -- Instead of true it can also be a list of languages
    additional_vim_regex_highlighting = false,
  },
}
EOF
lua <<EOF
require'nvim-treesitter.configs'.setup {
  incremental_selection = {
    enable = true,
    keymaps = {
      init_selection = "gnn",
      node_incremental = "grn",
      scope_incremental = "grc",
      node_decremental = "grm",
    },
  },
}
EOF
lua <<EOF
require'nvim-treesitter.configs'.setup {
  indent = {
    enable = true
  }
}
EOF

" LaTeX config
let g:livepreview_previewer = 'zathura'
let g:livepreview_use_biber = 1

" Grammorous config
let g:grammarous#languagetool_cmd = 'java -cp ~/languagetool/languagetool-server.jar org.languagetool.server.HTTPServer --port 8081 --allow-origin "*"'

" netrw configuration
let g:netrw_banner=0
let g:netrw_browse_split=4
let g:netrw_altv=1
let g:netrw_liststyle=3
let g:netrw_list_hide=netrw_gitignore#Hide()
let g:netrw_list_hide.=',\(^\|\s\s\)\zs\.\S\+'

" syntastic settings
set statusline+=%#warningmsg#
set statusline+=%{SyntasticStatuslineFlag()}
set statusline+=%*
let g:syntastic_always_populate_loc_list = 1
let g:syntastic_auto_loc_list = 1
let g:syntastic_check_on_open = 1
let g:syntastic_check_on_wq = 0

""
" Some basics
""
" Make ctags for supported languages
command! MakeTags !ctags -R .
" Add all subdirs to working path so :find works well
set path+=**
" Status line completion menu
set wildmenu
" Set above menu to a vertical instead of horizontal list
set wildmode=full,list,full
" Wrap long lines that continue past the viewport
set linebreak
" Highlight the column the cursor is on
set cursorcolumn
" Highlight the line the cursor is on
set cursorline
" Enables more colors
set termguicolors
" If there are folds, close some of them on startup
set foldlevelstart=99
" Use system clipboard for all yanking/pasting
set clipboard+=unnamedplus
" Use tabs but display them as 4 spaces instead of 8
set ts=4 sts=4 sw=4 expandtab
" Round the indent to a multiple of sw
set shiftround
" Set hidden character characters
set listchars=tab:▸\ ,eol:¬,nbsp:␣,trail:•,space:.,extends:→,precedes:←
set backspace=indent,eol,start
" Keep 12 lines above and below the cursor when scrolling
set scrolloff=12
" Disable mouse support
set mouse=
" Use indents to determine folds
set foldmethod=indent
" Set line numbers relative to current line
set number relativenumber
" Show partial commands in the bottom right
set showcmd
" Show which mode you're in
set showmode
" Display partial matches when searching
set incsearch
" Highlight search results—hide with :noh
set hlsearch
" Wrap searches around the end of the file
set wrapscan
" Tell Vim to be more liberal with creating hidden buffers
set hidden
" Case-insensitive search unless term contains uppercase chars
set smartcase

" Statusbar theme
let g:airline_powerline_fonts = 1
let g:airline_theme='bubblegum'
if !exists('g:airline_symbols')
	let g:airline_symbols = {}
endif

" Configure thesaurus
let g:tq_mthesaur_file="~/.config/nvim/thesaurus/mthesaur.txt"
let g:tq_enabled_backends=["datamuse_com","mthesaur_txt","openoffice_en"]

""
" Keybindings
""
" Insert timestamp at the end of the line in this format: 20200527T113245
nnoremap <C-t><C-s> m'A<C-R>=strftime('%Y%m%dT%H%M%S')<CR>
" Open a new tab
nnoremap <C-t>t :tabnew<CR>
" Toggle hidden characters
nnoremap <C-l> :set list!<CR>

" Window management
map <C-h> <C-w>h
map <C-j> <C-w>j
map <C-k> <C-w>k
map <C-l> <C-w>l

" Snippets
nnoremap ,nnm :read $HOME/.config/nvim/snippets/nnmail<CR>2jA
nnoremap ,sig :read $HOME/.config/nvim/snippets/signature<CR>

" only enable persistent undo if vim supports
if has('persistent_undo')
  set undodir=$HOME/.config/nvim/undofile
  set undofile
endif

" Only enable autocommands when Vim supports them
if has("autocmd")
	" Disables automatic commenting on newline:
	autocmd FileType * setlocal formatoptions-=c formatoptions-=r formatoptions-=o

	""
	" File-specific indentation settings
	""
	autocmd FileType make setlocal ts=8 sts=8 sw=8 noexpandtab
	autocmd FileType yaml setlocal ts=2 sts=2 sw=2 expandtab

	""
	" Email configuration
	""
	" Spellcheck in British English
	autocmd FileType eml setlocal spell spelllang=en_gb
	" Set lines to hard wrap at 72 chars
	autocmd FileType eml set tw=72

	""
	" Markdown Configuration
	""
	" Treat all .md files as markdown
	autocmd BufNewFile,BufRead *.md set filetype=markdown
	" Spellcheck in British English
	autocmd FileType markdown setlocal spell spelllang=en_gb

	""
	" Working with LaTeX
	""
	" Reduce udpatetime for faster previews
    autocmd BufNewFile,BufRead *.tex setfiletype tex
    autocmd FileType tex set ut=250
    autocmd FileType tex set colorcolumn=72

endif