call plug#begin()

" Brilliant_Plugins_by_tpope: ========================.
Plug 'tpope/vim-sensible'                             | " a sane and modern default configuration
Plug 'tpope/vim-surround'                             | " plugin makes cs"' inside a line replace " with '
Plug 'tpope/vim-fugitive'                             | " the most complete GIT integration plugin
Plug 'mhinz/vim-signify'                              | " show changes in the clutter bar


" Colorschemes: ======================================.
Plug 'chriskempson/base16-vim'                        | "
map <leader>q :bp<bar>sp<bar>bn<bar>bd<CR>.


" NERDTree: ==========================================.
Plug 'scrooloose/nerdtree'                            | " replace NetRW, which is kind of buggy
set winwidth=30                                         " keep NERDTreeWindow at least this size
set winminwidth=30                                      " (and all other windows, so TODO: watch out)

" depending on if NERDTree has the focus:
nnoremap <expr>
      \ <leader><leader>
      \ bufwinnr("%")==g:NERDTree.GetWinNum() ? ':NERDTreeClose<CR>' : ':NERDTreeCWD<CR>'
nnoremap <expr>
      \ <Tab>
      \ bufwinnr("%")==g:NERDTree.GetWinNum() ? '<C-W><C-W>' : ':bn<CR>'
nnoremap <expr>
      \ <S-Tab>
      \ bufwinnr("%")==g:NERDTree.GetWinNum() ? '<C-W><C-W>' : ':bp<CR>'
" close NERDTree if it is the last remaining window (taken from the official documentation)
autocmd bufenter *
      \ if (winnr("$") == 1 && exists("b:NERDTree") && b:NERDTree.isTabTree()) | q | endif


" AIRLINE: ===========================================.
Plug 'vim-airline/vim-airline'                        | " beautification of the mode line
set laststatus=2                                      | " required by AirLine, without status line does not appear until a window split
let g:airline_detect_modified                    = 0  |
let g:airline_detect_paste                       = 0  |
let g:airline_exclude_preview                    = 1  |
let g:airline_extensions                         = ['tabline', 'branch', 'syntastic']
let g:airline#extensions#tabline#disable_refresh = 1  |
let g:airline#extensions#tabline#enabled         = 1  |
let g:airline#extensions#tabline#fnamemod        = ':t:.' | " let airline just show the filename without its path
let g:airline#extensions#tabline#show_buffers    = 1  |
let g:airline#extensions#tabline#show_tabs       = 0  |
let g:airline#extensions#tagbar#enabled          = 1  |
let g:airline#extensions#tagbar#flags            = 's'
let g:airline#extensions#whitespace#enabled      = 0  |
let g:airline#extensions#wordcount#enabled       = 0  |
let g:airline_inactive_collapse                  = 1  |
let g:airline_powerline_fonts                    = 1  |
let g:airline_section_c                          = '%F'


" AIRLINE_Theme: =====================================.
Plug 'vim-airline/vim-airline-themes'                 | " airline themes to match any light and dark terminal using :AirlineTheme
let g:airline_theme='base16'                          | " specifies which colorscheme should airline uses
" let g:airline_theme='papercolor'                    | " specifies which colorscheme should airline uses


" Additional: ========================================.
Plug 'sheerun/vim-polyglot'                           " better syntax highlighting/indentation for multiple languages
Plug 'majutsushi/tagbar'                              " superseeds taglist-plus, which isn't maintained any more
let g:tagbar_autoclose                             = 1
let g:tagbar_autofocus                             = 1
let g:tagbar_compact                               = 1
let g:tagbar_indent                                = 0
nnoremap <leader>l :TagbarToggle<CR>|                 " bind TagBar to Hotkey Ctrl+L


" Autocompleter: =====================================.
Plug 'Valloric/MatchTagAlways'                        " highlights the closing tag/brace/...
Plug 'Valloric/YouCompleteMe'
let g:ycm_error_symbol                        = '✖'   " insert this as an error symbol in the gutter bar
let g:ycm_warning_symbol                      = '➔'   " insert this as a warning symbol in the gutter bar
let g:ycm_collect_identifiers_from_tags_files = 1     " Let YCM read tags from Ctags file
let g:ycm_use_ultisnips_completer             = 1     " Default 1, just ensure
let g:ycm_seed_identifiers_with_syntax        = 1     " Completion for programming language's keyword
let g:ycm_complete_in_comments                = 1     " Completion in comments
let g:ycm_complete_in_strings                 = 1     " Completion in string

Plug 'scrooloose/syntastic'
set statusline+=%#warningmsg#
set statusline+=%{SyntasticStatuslineFlag()}
set statusline+=%*
let g:LatexBox_latexmk_preview_continuously   = 1
let g:LatexBox_viewer                         = "evince"
let g:syntastic_always_populate_loc_list      = 1
let g:syntastic_auto_loc_list                 = 0
let g:syntastic_check_on_open                 = 1
let g:syntastic_check_on_wq                   = 0
let g:syntastic_quiet_messages                = {"type":"style"} " filter (=do not display) style/formatting errors and warnings
" Syntastic
let g:syntastic_error_symbol                  = '✖'
let g:syntastic_style_error_symbol            = '✗'
let g:syntastic_warning_symbol                = '➔'
let g:syntastic_style_warning_symbol          = '≈'

Plug 'davidhalter/jedi-vim'                           " jedi gets used to display python function signatures
let g:jedi#completions_enabled                = 0     " we do not need completions, because we have YouCompleteMe
let g:jedi#show_call_signatures               = 1     " which sadly does not support signatures like jedi
let g:jedi#show_call_signatures_delay         = 0
let g:jedi#auto_vim_configure                 = 0
let g:pymode_rope                             = 0     " https://github.com/davidhalter/jedi-vim/issues/163
" autocmd FileType python jedi.preload_module('os', 'sys', 'math')
" let g:pymode_options_max_line_length          = 120
" let g:syntastic_python_flake8_args='--ignore=F821,E302,E501,E241,E301'

Plug 'honza/vim-snippets'                             " dependency of ultisnips (see below)
Plug 'SirVer/ultisnips'                               " replaces loremipsum (and many more)
let g:UltiSnipsExpandTrigger                  = '<C-j>'| " Trigger configuration. Do not use <tab> if you use https://github.com/Valloric/YouCompleteMe.
let g:UltiSnipsJumpForwardTrigger             = '<C-j>'| " \
let g:UltiSnipsJumpBackwardTrigger            = '<C-k>'| " \
" let g:UltiSnipsListSnippets                 = '<c-s-tab>'| " YouCompleteMe includes those, so this isn't necessary
" let g:UltiSnipsEditSplit                    = 'vertical'


" Disabled ===========================================.
" Plug 'Shougo/neocomplete.vim'                       | " alternative to YouCompleteMe in some cases
" Plug 'tpope/vim-characterize'                       | " normal mode: make ga show character names of Unicode chars (ga shows hex and dec values)
" Plug 'tpope/vim-repeat'                             | " lets . (dot) repeat plugin macros as well, specifically vim-surround

call plug#end()                                       | " all plugins are getting loaded on this line, don't remove!

filetype on
filetype plugin on
filetype indent on
syntax on                     | " enable syntax highlighting
syntax sync minlines=60       | " how many preceding lines will be parsed? (has performance impact)
" set term=xtermc             | " required on solaris

let base16colorspace=256
colorscheme base16-phd
" colorscheme base16-embers
" colorscheme base16-flat
" colorscheme base16-summerfruit-dark
" colorscheme base16-tommorow
" colorscheme base16-default-dark


" colorscheme customizations =========================
" override colorscheme's background color in order to honor the terminals background transparency
hi normal ctermbg=none


" Shortcut mods =======================================.
inoremap <C-Space> <C-x><C-o>
"inoremap <C-@> <C-Space>
vnoremap < <gv|                   " allows deindenting a selected block and keeps selection
vnoremap > >gv|                   " allows indenting a selected block and keeps selection

" Bind CTRL+Backspace to vims version (CTRL+W) in " <CR> insert mode (only works with gvim)
inoremap
      \ <C-Backspace>
      \ <C-W>



" settings ============================================.
" set shell=/bin/bash           | " many scripts rely on bash, but its path varies why it is commented out here
" set selectmode=mouse,key,cmd  | " enters vim's select mode when pressing shift-left or shift-END
" set keymodel=startsel,stopsel | " makes shift-left, shift-right available for selecting text
set breakindent               | " Every wrapped line will continue visually indented
set clipboard=unnamedplus     | " makes copy and paste work (autoselectplus might work as well)
set complete+=d               | " scan current and included files for defined name or macro
set complete+=i               | " scan current and included files for completions
set concealcursor=nc          | " limits the display of concealed text to normal and command mode
set conceallevel=2            | " replace escaped chars by their utf-8 representation (useful for LaTeX)
set confirm                   | " asks 'do you want to save?'
set encoding=utf-8            | " set up vim's cosole encoding (not file encoding, for which there is fileencoding=)
set hidden                    | " allows switiching buffers even if the current buffer contains changes (displays +)
set hlsearch                  | " highlights all search matches (not as performant!)
set ignorecase smartcase      | " search with ignorecase by default, but use case sensitive search when one captical char is contained
set lazyredraw                | " disables redraw during macro exectution (improves performance)
set linebreak                 | " wrap long lines at char 'breakat', not inside words
set mouse=a                   | " also supported by vim, should be default
set nocursorcolumn            | " turn visual cursor column off (improves performance)
set nocursorline              | " turn visual cursor line off (improves performance)
set nofoldenable              | " disable code folding. I hate code folding
set norelativenumber          | " we deactivate relative numbers, but have them mentioned here so we won't forget they existed
set noshowmode                | " because we are using some powerline derivat
set nostartofline             | " when scrolling: do not move the cursor to column 1
set notimeout ttimeout        | " improves performance but is known to cause problems on slow terminals
set nowrap                    | " but do not (by default) wrap long lines around
set number                    | " turn line numbers on/off (performance decreases when they are shown)
set pumheight=8               | " Determines the maximum number of items to show in the popup menu for
set redrawtime=400            | " The time in milliseconds for redrawing the display.
set scrolljump=5              | " how many lines get scrolled into view when cursor reaches the screens edge
set spell spelllang=en,de     | " enable spell checker
set splitbelow                | " open new windows below the current one (i find that more intuitive)
set t_Co=256                  | " required on some ssh sessions
set textwidth=100             | " line length (80 used to be default, but...)
set thesaurus+=/home/max/.vim/thesaurus/php.txt
set ts=2 sts=2 sw=2 expandtab | " indentation which i like (abbr: tabstop, softtabstop, shiftwidth)
set ttimeoutlen=10            | " set esc key timeout in ms-
set ttyfast                   | " improves speed for terminal vim
set ttyscroll=100             | " improves speed for terminal vim
set writedelay=0
" set termguicolors             | " When on, uses highlight-guifg and highlight-guibg attributes in the terminal (=24bit color)

if has("multi_byte")
  scriptencoding utf-8        | " tell vim that we are using utf-8 here
  set encoding=utf-8          | " we need default utf-8 encoding to use cool chars as line break and so on (see below)
  set listchars=eol:↲         | " symbols used when using :set list (which displays non-printable chars)
  set listchars+=extends:»    | " symbols used when using :set list (which displays non-printable chars)
  set listchars+=precedes:«   | " symbols used when using :set list (which displays non-printable chars)
  set listchars+=tab:▸\       | " symbols used when using :set list (which displays non-printable chars)
  set listchars+=trail:·      | " symbols used when using :set list (which displays non-printable chars)
  set showbreak+=›            | " symbol used in the beginning of a wrapped line
end

if has("gui_running")
  set toolbar+=text
  set guioptions+=eig
  set guioptions-=T           | " toolbar
  set guioptions+=c           | " use console dialogs instead of popups
  set guioptions+=a           | " autoselect: copy&paste using middleclick
  set guioptions-=m           | " remove menu
  " set guifont=Droid\ Sans\ Mono\ for\ Powerline\ 12
  set guifont=Dejavu\ Sans\ Mono\ for\ Powerline\ 12
  set guioptions-=e           | " do not display tabs
endif

if bufname('%') == ''
  set bufhidden=wipe
endif

" noautocmd

if has("autocmd")
  set modeline                | " set variables specific to a file, like indentation by adding a comment
  " set default completion function in case YouCompleteMe cannot help
  set omnifunc=syntaxcomplete#Complete

  " automatically reload this file when it gets edited
  augroup reload_vimrc " {
    autocmd!
    autocmd BufWritePost $MYVIMRC source $MYVIMRC
  augroup END " }

  augroup remove_whitespaces " {
    " automatically remove trailing white spaces on save..
    autocmd BufWritePre * %s/\s\+$//e
  augroup END " }

  augroup set_window_title " {
    " autocmd BufWinEnter quickfix setl statusline=%t
    " autocmd BufEnter * let &titlestring = hostname() . "[vim(" . expand("%:t") . ")]"
    autocmd BufEnter * let &titlestring = "%t|".$USER."@".hostname().":%{expand(\"%:~:.:h\")}%=%y"


    " set window title for screen(3)
    if &term == "screen"
      set t_ts=k
      set t_fs=\
    endif
    if &term == "screen" || &term == "xterm"
      set titlelen=40
      set title
    endif
  augroup END

  augroup visual_mode_shows_unprintable " {
    set nolist                      | " shows unprinable characters in the current line
    " set cursorline              | " use setcursorline in order to highlight non printable chars in the current line
    autocmd ColorScheme * highlight NonText ctermbg=0 gui=bold guifg=#061229
    autocmd ColorScheme * highlight CursorLineNr  term=bold ctermfg=Yellow gui=bold guifg=Yellow
    "
    "
    " highlight NonText guifg=#1d1f21 | " make non printable chars invisible. The active line is an exception.
    " highlight ColorColumn guibg=#005f87
    " highlight ColorColumn guibg=#F0F0E0
  augroup END " }


  " hitting K over a keyword shows a help in a buffer.
  " Here we define the commands used to look those keywords up
  " as per file type...
  augroup keyword_lookups
    autocmd FileType python setlocal keywordprg=pydoc
    autocmd FileType vim    setlocal keywordprg=:help |.
  augroup END

  "set omnifunc=syntaxcomplete#Complete
  " au BufNewFile,BufRead,BufEnter *.cpp,*.hpp set omnifunc=omni#cpp#complete#Main
  " Enable omni completion.
  " autocmd FileType css setlocal omnifunc=csscomplete#CompleteCSS
  " autocmd FileType html,markdown setlocal omnifunc=htmlcomplete#CompleteTags
  " auto complete closing tag name when entering </-[space]
  " autocmd Filetype html,markdown,xml iabbrev </ </<C-X><C-O>
  " autocmd FileType python setlocal omnifunc=jedi#completions
  " following autocommands are there to call neovim functions...
  " autocmd FileType python setlocal omnifunc=pythoncomplete#Complete
  " autocmd FileType javascript setlocal omnifunc=javascriptcomplete#CompleteJS
  " autocmd FileType xml setlocal omnifunc=xmlcomplete#CompleteTags
  " " Enable heavy omni completion.
  " if !exists('g:neocomplete#sources#omni#input_patterns')
  "   let g:neocomplete#sources#omni#input_patterns = {}
  " endif
endif


" if filereadable(expand("~/.vimrc_background"))
"   let base16colorspace=256
"   source ~/.vimrc_background
" endif
" set colorcolumn=80            | " show an indicator (different background in column 80)
" set title
" set t_ts=^[k
" set t_fs=^[\
" auto BufEnter * :set title | let &titlestring = 'v:' . expand('%')
" auto VimLeave * :set t_ts=^[k^[\
"
" ALTERNATIVE:                                        |
" LightLine_and_MiniBufExplorer: =====================.
" Plug 'itchyny/lightline.vim'
" let g:lightline = {
"       \ 'colorscheme': 'PaperColor',
"       \ 'separator': { 'left': "\ue0b0", 'right': "\ue0b2" },
"       \ 'subseparator': { 'left': "\ue0b1", 'right': "\ue0b3" }
"       \ }
" Plug 'fholgado/minibufexpl.vim'
" let g:miniBufExplAutoStart = 1
" let g:miniBufExplBRSplit = 1
" let g:miniBufExplShowBufNumbers = 0
" let g:miniBufExplSplitToEdge = 1
" let g:miniBufExplVSplit = 20   " column width in chars
" NETRW: =============================================.
" Plug 'tpope/vim-vinegar'                              | " Improves :Explore
" let g:netrw_list_hide     = '^\..*'                   | " Explore mode: hide files starting with dot
" let g:netrw_hide          = 1                         | " show not-hidden files only
" let g:netrw_liststyle     = 3                         | " 3=tree
" let g:netrw_banner        = 0                         | " display help messages?
" let g:netrw_winsize       = 20                        | " window size in percent
" let g:netrw_fastbrowse    = 2                         | " manually refresh direcory list (avoids display errors)
" let g:netrw_keepdir       = 0
" let g:netrw_browse_split  = 4                         | " 4=open in previous window
" let g:netrw_preview       = 0                         | "
" let g:netrw_alto          = 0                         | " open files on the right
" let g:netrw_altv          = 1                         | " open files on the right