set nocompatible

" Pathogen setup
runtime! autoload/pathogen.vim
if exists('g:loaded_pathogen')
  filetype off

  call pathogen#runtime_append_all_bundles()
  call pathogen#helptags()
endif

" Syntax
syntax on
filetype plugin indent on
match ErrorMsg '\%>80v.\+'

" UI
set number
set ruler
set guioptions=aAce
set mouse=a
colorscheme railscasts

" Tabs/Whitespace
set tabstop=2
set shiftwidth=2
set autoindent
set smarttab
set expandtab
set nowrap
set list listchars=tab:\ \ ,trail:·

" Searching
set hlsearch
set incsearch
set ignorecase
set smartcase

" Tab completion
set wildmode=list:longest,list:full
set wildignore+=*.o,*.obj,.git,*.rbc

" Status bar
set laststatus=2

" NERDTree configuration
let NERDTreeIgnore=['\.rbc$', '\~$']
map <Leader>n :NERDTreeToggle<CR>

" Project Tree
autocmd VimEnter * call s:CdIfDirectory(expand("<amatch>"))


" If the parameter is a directory, cd into it
function s:CdIfDirectory(directory)
  let explicitDirectory = isdirectory(a:directory)
  let directory = explicitDirectory || empty(a:directory)

  if explicitDirectory
    exe "cd " . a:directory
  endif

  if directory
    NERDTree
    wincmd p
    bd
  endif
endfunction

" NERDTree utility function
function s:UpdateNERDTree(...)
  let stay = 0

  if(exists("a:1"))
    let stay = a:1
  end

  if exists("t:NERDTreeBufName")
    let nr = bufwinnr(t:NERDTreeBufName)
    if nr != -1
      exe nr . "wincmd w"
      exe substitute(mapcheck("R"), "<CR>", "", "")
      if !stay
        wincmd p
      end
    endif
  endif

  if exists("CommandTFlush")
    CommandTFlush
  endif
endfunction

" Utility functions to create file commands
function s:CommandCabbr(abbreviation, expansion)
  execute 'cabbrev ' . a:abbreviation . ' <c-r>=getcmdpos() == 1 && getcmdtype() == ":" ? "' . a:expansion . '" : "' . a:abbreviation . '"<CR>'
endfunction

function s:FileCommand(name, ...)
  if exists("a:1")
    let funcname = a:1
  else
    let funcname = a:name
  endif

  execute 'command -nargs=1 -complete=file ' . a:name . ' :call ' . funcname . '(<f-args>)'
endfunction

function s:DefineCommand(name, destination)
  call s:FileCommand(a:destination)
  call s:CommandCabbr(a:name, a:destination)
endfunction

" Public NERDTree-aware versions of builtin functions
function ChangeDirectory(dir, ...)
  execute "cd " . a:dir
  let stay = exists("a:1") ? a:1 : 1

  NERDTree

  if !stay
    wincmd p
  endif
endfunction

function Touch(file)
  execute "!touch " . a:file
  call s:UpdateNERDTree()
endfunction

function Remove(file)
  let current_path = expand("%")
  let removed_path = fnamemodify(a:file, ":p")

  if (current_path == removed_path) && (getbufvar("%", "&modified"))
    echo "You are trying to remove the file you are editing. Please close the buffer first."
  else
    execute "!rm " . a:file
  endif

  call s:UpdateNERDTree()
endfunction

function Edit(file)
  if exists("b:NERDTreeRoot")
    wincmd p
  endif

  execute "e " . a:file

  ruby << RUBY
  destination = File.expand_path(VIM.evaluate(%{system("dirname " . a:file)}))
  pwd         = File.expand_path(Dir.pwd)
  home        = pwd == File.expand_path("~")

  if home || Regexp.new("^" + Regexp.escape(pwd)) !~ destination
    VIM.command(%{call ChangeDirectory(system("dirname " . a:file), 0)})
  end
RUBY
endfunction

" Define the NERDTree-aware aliases
call s:DefineCommand("cd", "ChangeDirectory")
call s:DefineCommand("touch", "Touch")
call s:DefineCommand("rm", "Remove")
call s:DefineCommand("e", "Edit")

" This helps with RVM etc
set shell=/bin/sh

" CTags
map <Leader>rt :!ctags --extra=+f -R *<CR><CR>

" Remember last location in file
if has("autocmd")
  au BufReadPost * if line("'\"") > 0 && line("'\"") <= line("$")
    \| exe "normal g'\"" | endif
endif

function s:setupWrapping()
  set wrap
  set wm=2
  set textwidth=72
endfunction

function s:setupMarkup()
  call s:setupWrapping()
  map <buffer> <Leader>p :Mm <CR>
endfunction

" make and python use real tabs
au FileType make                                     set noexpandtab
au FileType python                                   set noexpandtab

" Thorfile, Rakefile and Gemfile are Ruby
au BufRead,BufNewFile {Gemfile,Rakefile,Thorfile,config.ru}    set ft=ruby

" md, markdown, and mk are markdown and define buffer-local preview
au BufRead,BufNewFile *.{md,markdown,mdown,mkd,mkdn} call s:setupMarkup()

au BufRead,BufNewFile *.txt call s:setupWrapping()

" allow backspacing over everything in insert mode
set backspace=indent,eol,start

" Window manipulation
"map tt               <C-w>
map <C-w><Backspace>   <Esc>:wincmd h
map <C-w><Space>       <Esc>:wincmd l
map <C-w><S-Backspace> <Esc>:wincmd H
map <C-w><S-Space>     <Esc>:wincmd L

" Opens an edit command with the path of the currently edited file filled in
" Normal mode: <Leader>e
map <Leader>e :e <C-R>=expand("%:p:h") . "/" <CR>

" Colemak
"
" * Switch 'h' and 'n' (so 'up' is on top of 'down').
" * Use <Space> and <Backspace> for <Right> and <Left>, instead (and disable 'j'
"   and 'l' which are where 'y' and 'u' are in in QWERTY)
nmap h <Up>
nmap k <Down>

" Nicer split controls
map <C-_> :split<CR>
map <C-\> :vsplit<CR>

" Emacs-like keys for the command line
cnoremap <C-A>      <Home>
cnoremap <C-E>      <End>
cnoremap <C-K>      <C-U>

set wildignore+=Transmission*Remote*GUI

let g:ragtag_global_maps = 1

if filereadable(expand('~/.vimrc.local'))
  source ~/.vimrc.local
endif

"Directories for swp files
set backupdir=~/.vim/backup
set directory=~/.vim/backup
" better way to run this?
let ignorethisvar = system("mkdir -p ~/.vim/backup")