" Function to source only if file exists {
function! SourceIfExists(file)
  if filereadable(expand(a:file))
    exe 'source' a:file
  endif
endfunction
" }

let rc_files = { 
  \ 'early': '~/.config/vim/early.vimrc',
  \ 'pre':   '~/.config/vim/pre-plug.vimrc',
  \ 'plug':  '~/.config/vim/plug.vimrc',
  \ 'post':  '~/.config/vim/post-plug.vimrc',
  \ 'late':  '~/.config/vim/late.vimrc',
  \ 'my':    $MYVIMRC
  \ }

" Edit source files
function! EditVimRcFiles()
  for rc_file in values(rc_files) 
    let ex_file = expand(rc_file)
    if filereadable(ex_file)
      exe 'tabedit' ex_file
    endif
  endfor
endfunction

call SourceIfExists(rc_files['early'])

" Hide buffers don't close them
set hidden
set path+=**

" File indent opts
set shiftwidth=2
set tabstop=8
set softtabstop=2
set expandtab
set encoding=utf-8
set listchars=trail:▂,extends:↲,precedes:↱,nbsp:▭,tab:╙─╖
set list
set wildmode=longest,list
set ignorecase
set infercase
filetype plugin indent on

" Set completion messages off
set shortmess+=c

" Preview window + menu for autocompletions
set completeopt+=preview
set completeopt+=menuone
set completeopt+=longest

" Lower update time (Default 4000)
set updatetime=300

" Always show the signcolumn, otherwise it would shift the text each time
" diagnostics appear/become resolved.
try
  " Vim 8.2 only
  set signcolumn=number
catch
  set signcolumn=yes:1
endtry
set number
set relativenumber

if exists('+termguicolors')
  set termguicolors
endif

exec "set rtp=$VIMHOME," . &rtp 

" (Optional) Multi-entry selection UI.

call SourceIfExists(rc_files['pre'])
call plug#begin("$VIMHOME/plugged")
  Plug 'junegunn/vim-easy-align'
  Plug 'tpope/vim-sensible'
  Plug 'tpope/vim-fugitive'
  Plug 'scrooloose/nerdtree', { 'on': 'NERDTreeToggle' }
  Plug 'Xuyuanp/nerdtree-git-plugin', { 'on': 'NERDTreeToggle' }
  Plug 'scrooloose/syntastic'
  Plug 'scrooloose/nerdcommenter'
  Plug 'scrooloose/vim-statline'
  Plug 'vim-perl/vim-perl', { 'for': 'perl', 'do': 'make clean carp dancer highlight-all-pragmas moose test-more try-tiny' }
  Plug 'rust-lang/rust.vim', { 'for': 'rust' }
  Plug 'pearofducks/ansible-vim', { 'for':  ['yaml', 'yml'] }
  Plug 'luochen1990/rainbow'
  Plug 'jremmen/vim-ripgrep', { 'on': ['Rg', 'RgRoot'] }
  Plug 'junegunn/fzf', { 'on': ['FZF', '<Plug>fzf#run', '<Plug>fzf#wrap'] }
  Plug 'sheerun/vim-polyglot'
  Plug 'adelarsq/vim-matchit'
  Plug 'vim-airline/vim-airline'
  Plug 'vim-airline/vim-airline-themes'
  Plug 'airblade/vim-gitgutter'
  Plug 'rakr/vim-one'
  Plug 'mox-mox/vim-localsearch'
  Plug 'neoclide/coc.nvim', { 'branch': 'release' }
  call SourceIfExists(rc_files['plug'])
  if has('nvim')
    Plug 'roxma/nvim-yarp'
    Plug 'roxma/vim-hug-neovim-rpc'
  endif
call plug#end()
call SourceIfExists(rc_files['post'])

execute ':silent !mkdir -p ~/.vimbackup'

set backupdir=~/.vimbackup 
set directory=~/.vimbackup
set hlsearch

" Airline
" Airline replaces showmode
set noshowmode
let g:airline#extensions#branch#format = 2
let g:airline#extensions#branch#displayed_head_limit = 16
let g:airline#extensions#tabline#enabled = 1
let g:airline#extensions#tabline#left_alt_sep = '|'
let g:airline_powerline_fonts = 1
let g:airline_theme='one'
if !exists('g:airline_symbols')
  let g:airline_symbols = {}
endif

" Commenting
let g:NERDSpaceDelims = 1
let g:NERDCompactSexyComs = 1
let g:NERDDefaultAlign = 'left'
let g:NERDCommentEmptyLines = 1
let g:NERDTrimTrailingWhitespace = 1

augroup PsoxNERDTree
  autocmd!
  " Autoquit if nerdtree is last open window
  autocmd BufEnter * if (winnr("$") == 1 && exists("b:NERDTree") && b:NERDTree.isTabTree()) | q | endif

  " Open nerdtree if opening a directory
  autocmd StdinReadPre * let s:std_in=1
  autocmd VimEnter * if argc() == 1 && isdirectory(argv()[0]) && !exists("s:std_in") | exe 'NERDTree' argv()[0] | wincmd p | ene | exe 'cd '.argv()[0] | endif
augroup END


" Syntastic Settings
" Note that airline automatically configures these
let g:syntastic_always_populate_loc_list = 1
let g:syntastic_enable_signs = 1
let g:syntastic_auto_loc_list = 1
let g:syntastic_check_on_open = 1
let g:syntastic_check_on_wq = 0
" Syntastic enable specific checkers
let g:syntastic_enable_zsh_checker = 1
let g:syntastic_enable_bash_checker = 1

" ripgrep settings
let g:rg_highlight = 'true'
let g:rg_derive_root = 'true'

" Other
let g:rainbow_active = 1
augroup PsoxFileAutos
  autocmd!
  autocmd FileType rust let g:autofmt_autosave = 1
  autocmd FileType yaml setlocal indentkeys-=<:> ts=8 sts=2 sw=2 expandtab
  " Tidy nerdtree windiw
  autocmd FileType nerdtree setlocal nocursorcolumn nonumber norelativenumber signcolumn=no
augroup END

" Set bindings for coc.nvim
if has_key(plugs, 'coc.nvim')
    let g:coc_global_extensions=['coc-yank', 'coc-spell-checker', 'coc-actions', 'coc-yaml', 'coc-vimlsp', 'coc-rust-analyzer', 'coc-json']
    " Use tab for trigger completion with characters ahead and navigate.
    " NOTE: Use command ':verbose imap <tab>' to make sure tab is not mapped by
    " other plugin before putting this into your config.
    inoremap <buffer><silent><expr> <TAB>
          \ pumvisible() ? "\<C-n>" :
          \ <SID>check_back_space() ? "\<TAB>" :
          \ coc#refresh()
    inoremap <buffer><expr><S-TAB> pumvisible() ? "\<C-p>" : "\<C-h>"

    function! s:check_back_space() abort
      let col = col('.') - 1
      return !col || getline('.')[col - 1]  =~# '\s'
    endfunction

    " Use <c-space> to trigger completion.
    inoremap <buffer><silent><expr> <c-space> coc#refresh()

    " Use <cr> to confirm completion, `<C-g>u` means break undo chain at current
    " position. Coc only does snippet and additional edit on confirm.
    " <cr> could be remapped by other vim plugin, try `:verbose imap <CR>`.
    if exists('*complete_info')
      inoremap <buffer><expr> <cr> complete_info()["selected"] != "-1" ? "\<C-y>" : "\<C-g>u\<CR>"
    else
      inoremap <buffer><expr> <cr> pumvisible() ? "\<C-y>" : "\<C-g>u\<CR>"
    endif

    " Use `[g` and `]g` to navigate diagnostics
    nmap <buffer><silent> [g <Plug>(coc-diagnostic-prev)
    nmap <buffer><silent> ]g <Plug>(coc-diagnostic-next)
    
    " Remap for do codeAction of selected region
    function! s:cocActionsOpenFromSelected(type) abort
      execute 'CocCommand actions.open ' . a:type
    endfunction
    xmap <buffer><silent> <leader>a :<C-u>execute 'CocCommand actions.open ' . visualmode()<CR>
    nmap <buffer><silent> <leader>a :<C-u>set operatorfunc=<SID>cocActionsOpenFromSelected<CR>g@
    nmap <buffer><silent> <leader>. :CocCommand actions.open<CR>

    nnoremap <buffer><silent> <C-Y> :<C-u>CocList -A --normal yank<CR>
endif

" NERDTree Toggle
nnoremap <F2> :NERDTreeToggle<CR>

" Workaround for writing readonly files
cnoremap w!! w !sudo tee % > /dev/null 

" Key Remapping
nnoremap <Leader>ve :edit $MYVIMRC<cr>
nnoremap <Leader>vs :source $MYVIMRC<cr>
nmap <leader>/ <Plug>localsearch_toggle

" Toggles all gutter items
nnoremap <silent> <leader>N :call ToggleGutter()<CR>

function! ToggleGutter() abort
  if &number
    exec "set nonumber norelativenumber signcolumn=no"
  else
    exec "set number relativenumber"
    try | set signcolumn=number | catch | set signcolumn=yes:1 | endtry
  endif
endfunction

" Default colorscheme
colorscheme one

set exrc
set secure
set modeline
set modelines=7

call SourceIfExists(rc_files['late'])

" vim: ts=8 sw=2 si