" Plugins
call plug#begin()

" Plugins listed below
Plug 'morhetz/gruvbox'
Plug 'lilydjwg/colorizer'

call plug#end()

" Call after plugin is loaded
autocmd vimenter * ++nested colorscheme gruvbox

set nocompatible " This fixes the problem where arrow keys do not function properly on some systems.
let mapleader=' ' " Use space for leader key

" General visual look of Vim
set number
set ruler
set noerrorbells
set laststatus=2
set noshowmode " Don't show mode in bottom status line
let &fillchars ..= ',eob: ' " Hide tildes at EOF
set splitbelow splitright
set cursorline " Highlight the active cursor line
set termguicolors

" Clipboard
set clipboard=unnamedplus

" Text searching options
set incsearch
set ignorecase
set smartcase
set showmatch

" Syntax and formatting
syntax on
set encoding=utf-8
set hidden

" Tabs and indenting
set smartindent
set tabstop=4
set shiftwidth=4
set softtabstop=4
set expandtab
set noshiftround
set scrolloff=3

" Command line completion options
set showcmd
set wildmenu
filetype plugin on
set omnifunc=syntaxcomplete#Complete
set completeopt=menuone,noselect " Don't autoselect the completion

" Setup undo history
if !isdirectory($HOME."/.vim")
    call mkdir($HOME."/.vim", "", 0770)
endif
if !isdirectory($HOME."/.vim/undo-dir")
    call mkdir($HOME."/.vim/undo-dir", "", 0700)
endif
set undodir=~/.vim/undo-dir
set undofile

" Colors
set background=dark
hi Normal guibg=NONE ctermbg=NONE " Set background transparent
" Setup terminal with gruvbox dark
let g:terminal_ansi_colors = [
    \ '#282828', '#cc241d',
    \ '#98971a', '#d79921',
    \ '#458588', '#b16286',
    \ '#689d6a', '#a89984',
    \ '#928374', '#fb4934',
    \ '#b8bb26', '#fabd2f',
    \ '#83a598', '#d3869b',
    \ '#8ec07c', '#ebdbb2',
    \]

" Setup netrw
let g:netrw_banner = 0
let g:netrw_liststyle = 3
let g:netrw_browse_split = 3
let g:netrw_altv = 1
let g:netrw_winsize = 25

" Setup custom statusline
function! GitBranch()
  return system("git rev-parse --abbrev-ref HEAD 2>/dev/null | tr -d '\n'")
endfunction

function! StatuslineGit()
  let l:branchname = GitBranch()
  return strlen(l:branchname) > 0?'  '.l:branchname.' ':''
endfunction

function! StatuslineMode()
  let l:mode=mode()
  if l:mode==#"n"
    return "Normal"
  elseif l:mode==#"v"
    return "Visual"
  elseif l:mode==#"V"
    return "Visual line"
  elseif l:mode==#"\<C-V>"
    return "Visual block"
  elseif l:mode==#"i"
   return "Insert"
  elseif l:mode==#"R"
    return "Replace"
  elseif l:mode==#"s"
    return "Select"
  elseif l:mode==#"t"
    return "Terminal"
  elseif l:mode==#"c"
    return "Enter command"
  elseif l:mode==#"!"
    return "Shell"
  endif
endfunction

"set statusline=
"set statusline+=%#Color458588#

"set statusline+=%#DiffAdd#%{(mode()=='n')?'\ \ NORMAL\ ':''}
"set statusline+=%#Color458588#%{(mode()=='i')?'\ \ INSERT\ ':''}
"set statusline+=%#ReplaceColor#%{(mode()=='R')?'\ \ REPLACE\ ':''}
"set statusline+=%#VisualColor#%{(mode()=='v')?'\ \ VISUAL\ ':''}
"set statusline+=%#PmenuSel#%{(mode()=='\<C-V>')?'\ \ BLOCK\ ':''}

"set statusline+=\ %{StatuslineMode()}\ 
"set statusline+=%#DiffAdd#
"set statusline+=%{StatuslineGit()}
"set statusline+=\ %F
"set statusline+=\ %r
"set statusline+=%m
"set statusline+=%#CursorColumn#
"set statusline+=%=
"set statusline+=\ %y\ 
"set statusline+=%#DiffAdd#
"set statusline+=\ %{&fileencoding?&fileencoding:&encoding}
"set statusline+=\[%{&fileformat}\]
"set statusline+=\ %p%%
"set statusline+=\ %l:%c
"set statusline+=\ 

let g:mode_colors = {
      \ 'n':  'StatusLineSection',
      \ 'v':  'StatusLineSectionV',
      \ "\<C-V>": 'StatusLineSectionV',
      \ 'i':  'StatusLineSectionI',
      \ 'c':  'StatusLineSectionC',
      \ 'r':  'StatusLineSectionR'
      \ }

fun! StatusLineRenderer()
  let hl = '%#' . get(g:mode_colors, tolower(mode()), g:mode_colors.n) . '#'

  return hl
        \ . ' %{StatuslineMode()} '
        \ . '%#DiffAdd#'
        \ . '%{StatuslineGit()}'
        \ . '%#DiffAdd#'
        \ . ' %F '
        \ . ' %r '
        \ . (&modified ? ' + ' : '') 
        \ . '%#CursorColumn#%='
        \ . hl
        \ . '%#DiffAdd#'
        \ . ' %{&fileencoding?&fileencoding:&encoding}'
        \ . ' [%{&fileformat}]'
        \ . ' %p%% '
        \ . ' %l:%c '
endfun

fun! <SID>StatusLineHighlights()
  hi StatusLine         ctermbg=8  guibg=#313131 ctermfg=15 guifg=#cccccc
  hi StatusLineNC       ctermbg=0  guibg=#313131 ctermfg=8  guifg=#999999
  hi StatusLineSection  ctermbg=8  guibg=#b8bb26 ctermfg=0  guifg=#333333
  hi StatusLineSectionV ctermbg=11 guibg=#928374 ctermfg=0  guifg=#000000
  hi StatusLineSectionI ctermbg=10 guibg=#83a598 ctermfg=0  guifg=#ffffff
  hi StatusLineSectionC ctermbg=12 guibg=#db7b55 ctermfg=0  guifg=#000000
  hi StatusLineSectionR ctermbg=12 guibg=#ed3f45 ctermfg=0  guifg=#000000
endfun

call <SID>StatusLineHighlights()

" only set default statusline once on initial startup.
" ignored on subsequent 'so $MYVIMRC' calls to prevent
" active buffer statusline from being 'blurred'.
if has('vim_starting')
  let &statusline = ' %{StatusLineFilename()}%= %l:%c '
endif

augroup vimrc
  au!
  " show focussed buffer statusline
  au FocusGained,VimEnter,WinEnter,BufWinEnter *
    \ setlocal statusline=%!StatusLineRenderer()

  " show blurred buffer statusline
  au FocusLost,VimLeave,WinLeave,BufWinLeave *
    \ setlocal statusline&

  " restore statusline highlights on colorscheme update
  au Colorscheme * call <SID>StatusLineHighlights()
augroup END