" General {{{

" use indentation for folds
set foldmethod=indent
set foldnestmax=5
set foldlevelstart=99
set foldcolumn=0


" Sets how many lines of history VIM has to remember
set history=700

" Set to auto read when a file is changed from the outside
set autoread

" With a map leader it's possible to do extra key combinations
" like <leader>w saves the current file
let mapleader = ","
let g:mapleader = ","

" Leader key timeout
set tm=2000

" Allow the normal use of "," by pressing it twice
noremap ,, ,

" Use par for prettier line formatting
set formatprg="PARINIT='rTbgqR B=.,?_A_a Q=_s>|' par\ -w72"

" Use stylish haskell instead of par for haskell buffers
augroup haskell_file
  autocmd!
  autocmd FileType haskell let &formatprg="stylish-haskell"
augroup END

" Kill the damned Ex mode.
nnoremap Q <nop>

" }}}

" Vundle {{{

set nocompatible
filetype off
set rtp+=~/.vim/bundle/vundle
call vundle#rc()

" let Vundle manage Vundle
" required!
Bundle 'gmarik/vundle'

" Support bundles
Bundle 'scrooloose/syntastic'

" Git
Bundle 'tpope/vim-fugitive'

" Bars, panels, and files
"Bundle 'scrooloose/nerdtree'
Bundle 'bling/vim-airline'

" Haskell
Bundle 'raichoo/haskell-vim'

" Other programming languages
Bundle 'zepto-lang/zepto-vim'
Bundle 'hellerve/carp-vim'
Bundle 'tikhomirov/vim-glsl'
Plugin 'rust-lang/rust.vim'
Plugin 'isRuslan/vim-es6'
Plugin 'JuliaEditorSupport/julia-vim'

" Extra
Plugin 'editorconfig/editorconfig-vim'

" Custom bundles
if filereadable(expand("~/.vim.local/bundles.vim"))
  source ~/.vim.local/bundles.vim
endif

" }}}

" VIM user interface {{{

" Set 7 lines to the cursor - when moving vertically using j/k
set so=7

" Turn on the WiLd menu
set wildmenu
" Tab-complete files up to longest unambiguous prefix
set wildmode=list:longest,full

" Always show current position
set ruler

" Show trailing whitespace
set list
" But only interesting whitespace
if &listchars ==# 'eol:$'
  set listchars=tab:>\ ,trail:-,extends:>,precedes:<,nbsp:+
endif

" Height of the command bar
set cmdheight=1

" Configure backspace so it acts as it should act
set backspace=eol,start,indent
set whichwrap+=<,>,h,l

" Ignore case when searching
set ignorecase

" When searching try to be smart about cases
set smartcase

" Highlight search results
set hlsearch

" Makes search act like search in modern browsers
set incsearch

" Don't redraw while executing macros (good performance config)
set lazyredraw

" For regular expressions turn magic on
set magic

" Show matching brackets when text indicator is over them
set showmatch
" How many tenths of a second to blink when matching brackets
set mat=2

" No annoying sound on errors
set noerrorbells
set vb t_vb=

if &term =~ '256color'
  " disable Background Color Erase (BCE) so that color schemes
  " render properly when inside 256-color tmux and GNU screen.
  " see also http://snk.tuxfamily.org/log/vim-256color-bce.html
  set t_ut=
endif

" Force redraw
map <silent> <leader>r :redraw!<CR>

" Turn mouse mode on
nnoremap <leader>ma :set mouse=a<cr>

" Turn mouse mode off
nnoremap <leader>mo :set mouse=<cr>

" Default to mouse mode on
set mouse=a
" }}}

" Colors and Fonts {{{

Bundle 'vim-scripts/wombat256.vim'
try
  colorscheme desert
catch
endtry

" Enable syntax highlighting
syntax enable

" Adjust signscolumn and syntastic to match wombat
hi! link SignColumn LineNr
hi! link SyntasticErrorSign ErrorMsg
hi! link SyntasticWarningSign WarningMsg

" Use pleasant but very visible search hilighting
hi Search ctermfg=white ctermbg=173 cterm=none guifg=#ffffff guibg=#e5786d gui=none
hi! link Visual Search

" Enable filetype plugins
filetype plugin on
filetype indent on

" Match wombat colors in nerd tree
hi Directory guifg=#8ac6f2

" Searing red very visible cursor
hi Cursor guibg=red

" Use same color behind concealed unicode characters
hi clear Conceal

" Set paste mode and use system clipboard
set paste
set clipboard=unnamed

" Don't blink normal mode cursor
set guicursor=n-v-c:block-Cursor
set guicursor+=n-v-c:blinkon0

" Set extra options when running in GUI mode
if has("gui_running")
  set guioptions-=T
  set guioptions-=e
  set guitablabel=%M\ %t
endif
set t_Co=256

" Set utf8 as standard encoding and en_US as the standard language
set encoding=utf8

" Use Unix as the standard file type
set ffs=unix,dos,mac

" Use large font by default in MacVim
set gfn=Monaco:h19

" }}}

" Files, backups and undo {{{

" Turn backup off, since most stuff is in Git anyway...
set nobackup
set nowb
set noswapfile

" Source the vimrc file after saving it
augroup sourcing
  autocmd!
  autocmd bufwritepost .vimrc source $MYVIMRC
augroup END

" Open file prompt with current path
nmap <leader>e :e <C-R>=expand("%:p:h") . '/'<CR>

" Show undo tree
nmap <silent> <leader>u :GundoToggle<CR>

" Fuzzy find files
nnoremap <silent> <Leader><space> :CtrlP<CR>
let g:ctrlp_max_files=0
let g:ctrlp_show_hidden=1
let g:ctrlp_custom_ignore = { 'dir': '\v[\/](.git)$' }

" }}}

" Text, tab and indent related {{{

" Use spaces instead of tabs
set expandtab

" Be smart when using tabs ;)
set smarttab

" 1 tab == 2 spaces
set shiftwidth=2
set tabstop=2

" Linebreak on 500 characters
set lbr
set tw=500

set ai "Auto indent
set si "Smart indent
set wrap "Wrap lines

" Pretty unicode haskell symbols
let g:haskell_conceal_wide = 1
let g:haskell_conceal_enumerations = 1

" }}}

" Visual mode related {{{

" Visual mode pressing * or # searches for the current selection
" Super useful! From an idea by Michael Naumann
vnoremap <silent> * :call VisualSelection('f', '')<CR>
vnoremap <silent> # :call VisualSelection('b', '')<CR>

" }}}

" Moving around, tabs, windows and buffers {{{

" Treat long lines as break lines (useful when moving around in them)
nnoremap j gj
nnoremap k gk

noremap <c-h> <c-w>h
noremap <c-k> <c-w>k
noremap <c-j> <c-w>j
noremap <c-l> <c-w>l

" Return to last edit position when opening files (You want this!)
augroup last_edit
  autocmd!
  autocmd BufReadPost *
       \ if line("'\"") > 0 && line("'\"") <= line("$") |
       \   exe "normal! g`\"" |
       \ endif
augroup END
" Remember info about open buffers on close
set viminfo^=%

" don't close buffers when you aren't displaying them
set hidden

" }}}

" Status line {{{

" Always show the status line
set laststatus=2

" }}}

" Editing mappings {{{

" Delete trailing white space on save
func! DeleteTrailingWS()
  exe "normal mz"
  %s/\s\+$//ge
  exe "normal `z"
endfunc

augroup whitespace
  autocmd!
  autocmd BufWrite *.hs :call DeleteTrailingWS()
augroup END

" }}}

" Spell checking {{{

" Pressing ,ss will toggle and untoggle spell checking
map <leader>ss :setlocal spell!<cr>

" }}}

" Helper functions {{{

function! CmdLine(str)
  exe "menu Foo.Bar :" . a:str
  emenu Foo.Bar
  unmenu Foo
endfunction 

function! VisualSelection(direction, extra_filter) range
  let l:saved_reg = @"
  execute "normal! vgvy"

  let l:pattern = escape(@", '\\/.*$^~[]')
  let l:pattern = substitute(l:pattern, "\n$", "", "")

  if a:direction == 'b'
    execute "normal ?" . l:pattern . "^M"
  elseif a:direction == 'gv'
    call CmdLine("vimgrep " . '/'. l:pattern . '/' . ' **/*.' . a:extra_filter)
  elseif a:direction == 'replace'
    call CmdLine("%s" . '/'. l:pattern . '/')
  elseif a:direction == 'f'
    execute "normal /" . l:pattern . "^M"
  endif

  let @/ = l:pattern
  let @" = l:saved_reg
endfunction

" }}}

" NERDTree {{{

" Close nerdtree after a file is selected
let NERDTreeQuitOnOpen = 1

function! IsNERDTreeOpen()
  return exists("t:NERDTreeBufName") && (bufwinnr(t:NERDTreeBufName) != -1)
endfunction

function! ToggleFindNerd()
  if IsNERDTreeOpen()
    exec ':NERDTreeToggle'
  else
    exec ':NERDTreeFind'
  endif
endfunction

" If nerd tree is closed, find current file, if open, close it
nmap <silent> <leader>f <ESC>:call ToggleFindNerd()<CR>
nmap <silent> <leader>F <ESC>:NERDTreeToggle<CR>

" }}}

" Alignment {{{

" Stop Align plugin from forcing its mappings on us
let g:loaded_AlignMapsPlugin=1
" Align on equal signs
map <Leader>a= :Align =<CR>
" Align on commas
map <Leader>a, :Align ,<CR>
" Align on pipes
map <Leader>a<bar> :Align <bar><CR>
" Prompt for align character
map <leader>ap :Align

" Enable some tabular presets for Haskell
let g:haskell_tabular = 1

" }}}

" Tags {{{

set tags=tags;/,codex.tags;/

" }}}

" Git {{{

let g:extradite_width = 60
" Hide messy Ggrep output and copen automatically
function! NonintrusiveGitGrep(term)
  execute "copen"
  " Map 't' to open selected item in new tab
  execute "nnoremap <silent> <buffer> t <C-W><CR><C-W>T"
  execute "silent! Ggrep " . a:term
  execute "redraw!"
endfunction

function! CommittedFiles()
  " Clear quickfix list
  let qf_list = []
  " Find files committed in HEAD
  let git_output = system("git diff-tree --no-commit-id --name-only -r HEAD\n")
  for committed_file in split(git_output, "\n")
    let qf_item = {'filename': committed_file}
    call add(qf_list, qf_item)
  endfor
  " Fill quickfix list with them
  call setqflist(qf_list, '')
endfunction

" }}}

" Haskell Interrogation {{{

set completeopt+=longest

" Use buffer words as default tab completion
let g:SuperTabDefaultCompletionType = '<c-x><c-p>'

" Haskell Lint
let g:syntastic_mode_map = { 'mode': 'active', 'passive_filetypes': ['haskell'] }
nmap <silent> <leader>hl :SyntasticCheck hlint<CR>

" }}}

" Conversion {{{

function! Pointfree()
  call setline('.', split(system('pointfree '.shellescape(join(getline(a:firstline, a:lastline), "\n"))), "\n"))
endfunction
vnoremap <silent> <leader>h. :call Pointfree()<CR>

function! Pointful()
  call setline('.', split(system('pointful '.shellescape(join(getline(a:firstline, a:lastline), "\n"))), "\n"))
endfunction
vnoremap <silent> <leader>h> :call Pointful()<CR>

" }}}

let g:syntastic_carp_checkers = ['carp']
command Cr !carp -x %