call plug#begin()
Plug 'nsf/gocode', { 'rtp': 'vim', 'do': '~/.vim/plugged/gocode/vim/symlink.sh' }
Plug 'fatih/vim-go'
Plug 'fatih/molokai'
Plug 'SirVer/ultisnips'
Plug 'ctrlpvim/ctrlp.vim'
call plug#end()

set nocompatible                " Enables us Vim specific features
filetype off                    " Reset filetype detection first ...
filetype plugin indent on       " ... and enable filetype detection
set ttyfast                     " Indicate fast terminal conn for faster redraw
set ttymouse=xterm2             " Indicate terminal type for mouse codes
set ttyscroll=3                 " Speedup scrolling
set laststatus=2                " Show status line always
set encoding=utf-8              " Set default encoding to UTF-8
set autoread                    " Automatically read changed files
set autoindent                  " Enabile Autoindent
set backspace=indent,eol,start  " Makes backspace key more powerful.
set incsearch                   " Shows the match while typing
set hlsearch                    " Highlight found searches
set noerrorbells                " No beeps
set number                      " Show line numbers
set showcmd                     " Show me what I'm typing
set noswapfile                  " Don't use swapfile
set nobackup                    " Don't create annoying backup files
set splitright                  " Vertical windows should be split to right
set splitbelow                  " Horizontal windows should split to bottom
set autowrite                   " Automatically save before :next, :make etc.
set hidden                      " Buffer should still exist if window is closed
set fileformats=unix,dos,mac    " Prefer Unix over Windows over OS 9 formats
set noshowmatch                 " Do not show matching brackets by flickering
set noshowmode                  " We show the mode with airline or lightline
set ignorecase                  " Search case insensitive...
set smartcase                   " ... but not it begins with upper case
set completeopt=menu,menuone    " Show popup menu, even if there is one entry
set pumheight=10                " Completion window max size
set nocursorcolumn              " Do not highlight column (speeds up highlighting)
set nocursorline                " Do not highlight cursor (speeds up highlighting)
set lazyredraw                  " Wait to redraw

" colorscheme
syntax enable
set t_Co=256
let g:rehash256 = 1
let g:molokai_original = 1
colorscheme molokai

" mapping
map <C-n> :cnext<CR>
map <C-m> :cprevious<CR>
nnoremap <leader>a :cclose<CR>
nmap <C-g> :GoDeclsDir<cr>
imap <C-g> <esc>:<C-u>GoDeclsDir<cr>

" vim-go settings
let g:go_fmt_command = "goimports"
let g:go_autodetect_gopath = 1
let g:go_list_type = "quickfix"

let g:go_highlight_types = 1
let g:go_highlight_fields = 1
let g:go_highlight_functions = 1
let g:go_highlight_function_calls = 1
let g:go_highlight_extra_types = 1
let g:go_highlight_generate_tags = 1

augroup go
  autocmd!

  " Show by default 4 spaces for a tab
  autocmd BufNewFile,BufRead *.go setlocal noexpandtab tabstop=4 shiftwidth=4

  " :GoBuild and :GoTestCompile
  autocmd FileType go nmap <leader>b :<C-u>call <SID>build_go_files()<CR>

  " :GoTest
  autocmd FileType go nmap <leader>t  <Plug>(go-test)

  " :GoRun
  autocmd FileType go nmap <leader>r  <Plug>(go-run)

  " :GoDoc
  autocmd FileType go nmap <Leader>d <Plug>(go-doc)

  " :GoCoverageToggle
  autocmd FileType go nmap <Leader>c <Plug>(go-coverage-toggle)

  " :GoInfo
  autocmd FileType go nmap <Leader>i <Plug>(go-info)

  " :GoMetaLinter
  autocmd FileType go nmap <Leader>l <Plug>(go-metalinter)

  " :GoDef but opens in a vertical split
  autocmd FileType go nmap <Leader>v <Plug>(go-def-vertical)
  " :GoDef but opens in a horizontal split
  autocmd FileType go nmap <Leader>s <Plug>(go-def-split)

augroup END

" build_go_files is a custom function that builds or compiles the test file.
" It calls :GoBuild if its a Go file, or :GoTestCompile if it's a test file
function! s:build_go_files()
  let l:file = expand('%')
  if l:file =~# '^\f\+_test\.go$'
    call go#test#Test(0, 1)
  elseif l:file =~# '^\f\+\.go$'
    call go#cmd#Build(0)
  endif
endfunction