" plugins
let need_to_install_plugins = 0
if empty(glob('~/.vim/autoload/plug.vim'))
    silent !curl -fLo ~/.vim/autoload/plug.vim --create-dirs
        \ https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
    "autocmd VimEnter * PlugInstall --sync | source $MYVIMRC
    let need_to_install_plugins = 1
endif

call plug#begin()
Plug 'tpope/vim-sensible'
Plug 'itchyny/lightline.vim'
Plug 'joshdick/onedark.vim'
Plug 'ap/vim-buftabline'
Plug 'airblade/vim-gitgutter'
Plug 'vim-scripts/The-NERD-tree'
Plug 'jistr/vim-nerdtree-tabs'
Plug 'Xuyuanp/nerdtree-git-plugin'
Plug 'scrooloose/syntastic'
Plug 'majutsushi/tagbar'
Plug 'vim-scripts/indentpython.vim'
Plug 'lepture/vim-jinja'
Plug 'pangloss/vim-javascript'
call plug#end()

filetype plugin indent on
syntax on

if need_to_install_plugins == 1
    echo "Installing plugins..."
    silent! PlugInstall
    echo "Done!"
    q
endif

" always show the status bar
set laststatus=2

" enable 256 colors
set t_Co=256
set t_ut=

" turn on line numbering
set number

" sane text files
set fileformat=unix
set encoding=utf-8
set fileencoding=utf-8

" sane editing
set tabstop=4
set shiftwidth=4
set softtabstop=4
set colorcolumn=80
set expandtab
set viminfo='25,\"50,n~/.viminfo

" word movement
imap  bi
nmap  b
imap  wi
nmap  w

" indent/unindent with tab/shift-tab
nmap  >>
imap  < <<

" mouse
set mouse=a
let g:is_mouse_enabled = 1
noremap  m :call ToggleMouse()
function ToggleMouse()
    if g:is_mouse_enabled == 1
        echo "Mouse OFF"
        set mouse=
        let g:is_mouse_enabled = 0
    else
        echo "Mouse ON"
        set mouse=a
        let g:is_mouse_enabled = 1
    endif
endfunction

" color scheme
syntax on
colorscheme onedark
filetype on
filetype plugin indent on

" lightline
set noshowmode
let g:lightline = { 'colorscheme': 'onedark' }

" code folding
set foldmethod=indent
set foldlevel=99

" wrap toggle
setlocal nowrap
noremap  w :call ToggleWrap()
function ToggleWrap()
    if &wrap
        echo "Wrap OFF"
        setlocal nowrap
        set virtualedit=all
        silent! nunmap  
        silent! nunmap  
        silent! nunmap  
        silent! nunmap  
        silent! iunmap  
        silent! iunmap  
        silent! iunmap  
        silent! iunmap  
    else
        echo "Wrap ON"
        setlocal wrap linebreak nolist
        set virtualedit=
        setlocal display+=lastline
        noremap       gk
        noremap     gj
        noremap     g
        noremap      g
        inoremap      gk
        inoremap    gj
        inoremap    g
        inoremap     g
    endif
endfunction

" move through split windows
nmap  :wincmd k
nmap  :wincmd j
nmap  :wincmd h
nmap  :wincmd l

" move through buffers
nmap [ :bp!
nmap ] :bn!
nmap x :bd

" restore place in file from previous session
autocmd BufReadPost * if line("'\"") > 1 && line("'\"") <= line("$") | exe "normal! g'\"" | endif

" file browser
let NERDTreeIgnore = ['\.pyc$', '__pycache__']
let NERDTreeMinimalUI = 1
let g:nerdtree_open = 0
map n :call NERDTreeToggle()
function NERDTreeToggle()
    NERDTreeTabsToggle
    if g:nerdtree_open == 1
        let g:nerdtree_open = 0
    else
        let g:nerdtree_open = 1
        wincmd p
    endif
endfunction

" syntastic
let g:syntastic_always_populate_loc_list = 1
let g:syntastic_auto_loc_list = 1
let g:syntastic_check_on_open = 0
let g:syntastic_check_on_wq = 0
map s :SyntasticCheck
map d :SyntasticReset
map e :lnext
map r :lprev

" tag list
map t :TagbarToggle

" copy, cut and paste
vmap  "+y
vmap  "+c
vmap  c"+p
imap  "+pa

" disable autoindent when pasting text
" source: https://coderwall.com/p/if9mda/automatically-set-paste-mode-in-vim-when-pasting-in-insert-mode
let &t_SI .= "\[?2004h"
let &t_EI .= "\[?2004l"

function! XTermPasteBegin()
    set pastetoggle=[201~
    set paste
    return ""
endfunction

inoremap   [200~ XTermPasteBegin()