" Basic display
set number
set colorcolumn=80

" Persistent undo
set undofile
set undolevels=4096
set undoreload=16384

" Search
set ignorecase

" Hide search when enter is pressed
nnoremap <silent> <CR> :nohlsearch<CR>

" Autoload settings from file
set modeline

" Use system clipboard
set clipboard=unnamedplus

" Support more file encodings
set fileencodings=ucs-bom,utf-8,default,sjis,latin1

" Scroll before reaching top/bottom
set scrolloff=5

" Conceal when line is not active
set conceallevel=1

" Just hide buffer instead of unloading
set hidden

" Remap leader key
let mapleader = ","

" Jump to the last position
if has("autocmd")
  au BufReadPost * if line("'\"") > 0 && line("'\"") <= line("$")
    \| exe "normal! g`\"" | endif
endif

call plug#begin('~/.local/share/nvim/plugged')

" Multi-entry selection UI
Plug 'junegunn/fzf', { 'tag': trim(system('fzf --version')) }
" FIXME: update once nixpkgs stable has fzf ≥ 0.23
Plug 'junegunn/fzf.vim', { 'commit': '0fe8e198a3a501b54dbc4f9587526c097599f95a' }

" Per-project settings
Plug 'editorconfig/editorconfig-vim'

" Tagbar
Plug 'majutsushi/tagbar'
nmap <F8> :TagbarToggle<CR>

" Snippets
if has('python3')
  Plug 'SirVer/ultisnips'
  let g:UltiSnipsExpandTrigger = '<tab>'
  let g:UltiSnipsJumpForwardTrigger = '<tab>'
  let g:UltiSnipsJumpBackwardTrigger = '<s-tab>'
  Plug 'honza/vim-snippets'
endif

" Deoplete
Plug 'Shougo/deoplete.nvim', { 'do': ':UpdateRemotePlugins' }
let g:deoplete#enable_at_startup = 1

" Airline
Plug 'vim-airline/vim-airline'
Plug 'vim-airline/vim-airline-themes'
let g:airline_powerline_fonts = 1
let g:airline_solarized_bg='dark'
let g:airline_theme='solarized'

" Airline for tmux
Plug 'edkolev/tmuxline.vim'

" NERDTree
Plug 'preservim/nerdtree'
Plug 'jistr/vim-nerdtree-tabs'
map <Leader>N <plug>NERDTreeTabsToggle<CR>
map <Leader>n <plug>NERDTreeFocusToggle<CR>
Plug 'Xuyuanp/nerdtree-git-plugin'

" Icons for NERDTree and airline
Plug 'ryanoasis/vim-devicons'

" Git integration
Plug 'tpope/vim-fugitive'

" Intra word motion
Plug 'chaoren/vim-wordmotion'

" Trailing whitespace highlighting
Plug 'ntpeters/vim-better-whitespace'

" Syntax highlighting/Language support
Plug 'Glench/Vim-Jinja2-Syntax', { 'for': 'jinja' }
Plug 'LnL7/vim-nix', { 'for': 'nix' }
Plug 'cespare/vim-toml', { 'for': 'toml' }
Plug 'mechatroner/rainbow_csv'
Plug 'posva/vim-vue', { 'for': 'vue' }
Plug 'sirtaj/vim-openscad', { 'for': 'openscad' }

" Language Client
Plug 'autozimu/LanguageClient-neovim', {
    \ 'branch': 'next',
    \ 'do': 'bash install.sh',
    \ }

let g:LanguageClient_serverCommands = {
    \ 'rust': ['nix-shell', '--quiet', '-p', 'rls', '--run', 'rls'],
    \ 'go': ['nix-shell', '--quiet', '-p', 'gopls', '--run', 'gopls'],
    \ 'python': ['nix-shell', '--quiet', '-p', 'python38Packages.python-language-server', '--run', 'pyls'],
    \ 'typescript': ['nix-shell', '--quiet', '-p', 'nodePackages.javascript-typescript-langserver', '--run', 'javascript-typescript-stdio'],
    \ 'javascript': ['nix-shell', '--quiet', '-p', 'nodePackages.javascript-typescript-langserver', '--run', 'javascript-typescript-stdio'],
    \ 'haskell': ['nix-shell', '--quiet', '-p', 'haskellPackages.haskell-language-server', '--run', 'haskell-language-server --lsp'],
    \ }

let g:LanguageClient_loggingFile = '~/.local/share/nvim/LanguageClient.log'
let g:LanguageClient_settingsPath = '~/.config/nvim/LanguageClient.json'

function LC_maps()
  if has_key(g:LanguageClient_serverCommands, &filetype)
    nnoremap <buffer> <silent> <F5> :call LanguageClient_contextMenu()<CR>
    nnoremap <buffer> <silent> K :call LanguageClient#textDocument_hover()<CR>
    nnoremap <buffer> <silent> gd :call LanguageClient#textDocument_definition()<CR>
    nnoremap <buffer> <silent> <F2> :call LanguageClient#textDocument_rename()<CR>
    set formatexpr=LanguageClient#textDocument_rangeFormatting_sync()
  endif
endfunction

autocmd FileType * call LC_maps()

" Rust
Plug 'rust-lang/rust.vim'
let g:rustfmt_autosave_if_config_present = 1
let g:rust_fold = 1
map <Leader>rt :RustTest<CR>

" Black (python formatter)
Plug 'psf/black', { 'commit': '1d3fb871bec82d1263940ba1d32095d660fea2ab', 'for': 'python' }

" LaTeX helpers
Plug 'lervag/vimtex'
let g:tex_flavor='latex'
let g:vimtex_view_method='zathura'
let g:tex_conceal='abdmg'
let g:vimtex_syntax_autoload_packages = [
  \'amsmath',
  \'luacode',
  \]
" this disables some helful warnings that often have a reason why I ignore them
let g:vimtex_quickfix_ignore_filters = [
  \'Underfull \\hbox (badness [0-9]*) in ',
  \'Overfull \\hbox ([0-9]*.[0-9]*pt too wide) in ',
  \'Overfull \\vbox ([0-9]*.[0-9]*pt too high) detected ',
  \'Package hyperref Warning: Token not allowed in a PDF string',
  \'Package typearea Warning: Bad type area settings!',
  \]
" When using math environments vim does not know if if it currently is in one
" or outside of one unless it parses the file from the start. Parsing the
" file from the start each time fixes this but leads to a performance drop
" (depending on the number of lines).
" Also, somehow using FileType tex does not work, so this will enable slow
" syntax highlighting everywhere once a *.tex file is opened.
autocmd BufEnter *.tex syntax sync fromstart

" Color schemes
Plug 'altercation/vim-colors-solarized'

call plug#end()

set background=dark
silent! colorscheme solarized