init.vim

call plug#begin()
Plug 'sainnhe/sonokai'
Plug 'vim-airline/vim-airline'
Plug 'vim-airline/vim-airline-themes'
Plug 'sheerun/vim-polyglot'
Plug 'preservim/nerdtree'
Plug 'tiagofumo/vim-nerdtree-syntax-highlight'
Plug 'Xuyuanp/nerdtree-git-plugin'
Plug 'wakatime/vim-wakatime'
Plug 'dense-analysis/ale'
Plug 'neoclide/coc.nvim' , { 'branch' : 'release' }
Plug 'honza/vim-snippets'
Plug 'jiangmiao/auto-pairs'

if (has("nvim"))
    Plug 'nvim-lua/plenary.nvim'
    Plug 'nvim-telescope/telescope.nvim'
endif

call plug#end()


" Global Sets """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
syntax on            " Enable syntax highlight
set nu               " Enable line numbers
set tabstop=4        " Show existing tab with 4 spaces width
set softtabstop=4    " Show existing tab with 4 spaces width
set shiftwidth=4     " When indenting with '>', use 4 spaces width
set expandtab        " On pressing tab, insert 4 spaces
set smarttab         " insert tabs on the start of a line according to shiftwidth
set smartindent      " Automatically inserts one extra level of indentation in some cases
set hidden           " Hides the current buffer when a new file is openned
set incsearch        " Incremental search
set ignorecase       " Ingore case in search
set smartcase        " Consider case if there is a upper case character
set scrolloff=8      " Minimum number of lines to keep above and below the cursor
set colorcolumn=100  " Draws a line at the given line to keep aware of the line size
set signcolumn=yes   " Add a column on the left. Useful for linting
set cmdheight=2      " Give more space for displaying messages
set updatetime=100   " Time in miliseconds to consider the changes
set encoding=utf-8   " The encoding should be utf-8 to activate the font icons
set nobackup         " No backup files
set nowritebackup    " No backup files
set splitright       " Create the vertical splits to the right
set splitbelow       " Create the horizontal splits below
set autoread         " Update vim after file update from outside
set mouse=a          " Enable mouse support
filetype on          " Detect and set the filetype option and trigger the FileType Event
filetype plugin on   " Load the plugin file for the file type, if any
filetype indent on   " Load the indent file for the file type, if any


" Themes """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
if exists('+termguicolors')
  let &t_8f = "\<Esc>[38;2;%lu;%lu;%lum"
  let &t_8b = "\<Esc>[48;2;%lu;%lu;%lum"
  set termguicolors
endif

let g:sonokai_style = 'atlantis'
let g:sonokai_enable_italic = 1
let g:sonokai_disable_italic_comment = 0
let g:sonokai_diagnostic_line_highlight = 1
let g:sonokai_current_word = 'bold'
colorscheme sonokai

if (has("nvim")) "Transparent background. Only for nvim
    highlight Normal guibg=NONE ctermbg=NONE
    highlight EndOfBuffer guibg=NONE ctermbg=NONE
endif

let g:airline_theme = 'sonokai'


" Remaps """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" remaps here

" Shortcuts for split navigation
map <C-h> <C-w>h
map <C-j> <C-w>j
map <C-k> <C-w>k
map <C-l> <C-w>l

" Adding an empty line below, above and below with insert
nmap op o<Esc>k
nmap oi O<Esc>j
nmap oo A<CR>

" Create any tabs
nmap te :tabe<CR>

" Navigate between buffers
nmap ty :bn<CR>
nmap tr :bp<CR>

" Delete a buffer
nmap td :bd<CR>

" Create splits
nmap th :split<CR>
nmap tv :vsplit<CR>

" Close splits and others
nmap tt :q<CR>

" Call command Shortcut
nmap tc :!


" autocmd """"""""""
" autocmds here

function! HighlightWordUnderCursor()
    if getline(".")[col(".")-1] !~# '[[:punct:][:blank:]]'
        exec 'match' 'Search' '/\V\<'.expand('<cword>').'\>/'
    else
        match none
    endif
endfunction

autocmd! CursorHold,CursorHoldI * call HighlightWordUnderCursor()


" AirLine """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
let g:airline#extensions#tabline#enabled = 1
let g:airline_powerline_fonts = 1


" NerdTree """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
nmap <C-a> :NERDTreeToggle<CR>


" ALE """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
let g:ale_linters = {
\   'python': ['flake8', 'pyright', 'bandit'],
\}

let g:ale_fixers = {
\   '*': ['trim_whitespace'],
\}

let g:ale_fix_on_save = 1


" NeoVim """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
if (has("nvim"))
    " Telescope """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
    nnoremap <leader>ff <cmd>Telescope find_files<cr>
    nnoremap <leader>fg <cmd>Telescope live_grep<cr>
    nnoremap <leader>fb <cmd>Telescope buffers<cr>
    nnoremap <leader>fh <cmd>Telescope help_tags<cr>
endif


" COC """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""

let g:coc_global_extensions = [ 'coc-snippets', 'coc-explorer' ]

" Set internal encoding of vim, not needed on neovim, since coc.nvim using some
" unicode characters in the file autoload/float.vim
set encoding=utf-8

" TextEdit might fail if hidden is not set.
set hidden

" Some servers have issues with backup files, see #649.
set nobackup
set nowritebackup

" Give more space for displaying messages.
set cmdheight=2

" Having longer updatetime (default is 4000 ms = 4 s) leads to noticeable
" delays and poor user experience.
set updatetime=300

" Don't pass messages to |ins-completion-menu|.
set shortmess+=c

" Always show the signcolumn, otherwise it would shift the text each time
" diagnostics appear/become resolved.
if has("nvim-0.5.0") || has("patch-8.1.1564")
  " Recently vim can merge signcolumn and number column into one
  set signcolumn=number
else
  set signcolumn=yes
endif

" 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 <silent><expr> <TAB>
      \ pumvisible() ? "\<C-n>" :
      \ CheckBackspace() ? "\<TAB>" :
      \ coc#refresh()
inoremap <expr><S-TAB> pumvisible() ? "\<C-p>" : "\<C-h>"

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

" Use <c-space> to trigger completion.
if has('nvim')
  inoremap <silent><expr> <c-space> coc#refresh()
else
  inoremap <silent><expr> <c-@> coc#refresh()
endif

" Make <CR> auto-select the first completion item and notify coc.nvim to
" format on enter, <cr> could be remapped by other vim plugin
inoremap <silent><expr> <cr> pumvisible() ? coc#_select_confirm()
                              \: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"

" Use `[g` and `]g` to navigate diagnostics
" Use `:CocDiagnostics` to get all diagnostics of current buffer in location list.
nmap <silent> [g <Plug>(coc-diagnostic-prev)
nmap <silent> ]g <Plug>(coc-diagnostic-next)

" GoTo code navigation.
nmap <silent> gd <Plug>(coc-definition)
nmap <silent> gy <Plug>(coc-type-definition)
nmap <silent> gi <Plug>(coc-implementation)
nmap <silent> gr <Plug>(coc-references)

" Use K to show documentation in preview window.
nnoremap <silent> K :call ShowDocumentation()<CR>

function! ShowDocumentation()
  if CocAction('hasProvider', 'hover')
    call CocActionAsync('doHover')
  else
    call feedkeys('K', 'in')
  endif
endfunction

" Highlight the symbol and its references when holding the cursor.
autocmd CursorHold * silent call CocActionAsync('highlight')

" Symbol renaming.
nmap <leader>rn <Plug>(coc-rename)

" Formatting selected code.
xmap <leader>f  <Plug>(coc-format-selected)
nmap <leader>f  <Plug>(coc-format-selected)

augroup mygroup
  autocmd!
  " Setup formatexpr specified filetype(s).
  autocmd FileType typescript,json setl formatexpr=CocAction('formatSelected')
  " Update signature help on jump placeholder.
  autocmd User CocJumpPlaceholder call CocActionAsync('showSignatureHelp')
augroup end

" Applying codeAction to the selected region.
" Example: `<leader>aap` for current paragraph
xmap <leader>a  <Plug>(coc-codeaction-selected)
nmap <leader>a  <Plug>(coc-codeaction-selected)

" Remap keys for applying codeAction to the current buffer.
nmap <leader>ac  <Plug>(coc-codeaction)
" Apply AutoFix to problem on the current line.
nmap <leader>qf  <Plug>(coc-fix-current)

" Run the Code Lens action on the current line.
nmap <leader>cl  <Plug>(coc-codelens-action)

" Map function and class text objects
" NOTE: Requires 'textDocument.documentSymbol' support from the language server.
xmap if <Plug>(coc-funcobj-i)
omap if <Plug>(coc-funcobj-i)
xmap af <Plug>(coc-funcobj-a)
omap af <Plug>(coc-funcobj-a)
xmap ic <Plug>(coc-classobj-i)
omap ic <Plug>(coc-classobj-i)
xmap ac <Plug>(coc-classobj-a)
omap ac <Plug>(coc-classobj-a)

" Remap <C-f> and <C-b> for scroll float windows/popups.
if has('nvim-0.4.0') || has('patch-8.2.0750')
  nnoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? coc#float#scroll(1) : "\<C-f>"
  nnoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? coc#float#scroll(0) : "\<C-b>"
  inoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? "\<c-r>=coc#float#scroll(1)\<cr>" : "\<Right>"
  inoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? "\<c-r>=coc#float#scroll(0)\<cr>" : "\<Left>"
  vnoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? coc#float#scroll(1) : "\<C-f>"
  vnoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? coc#float#scroll(0) : "\<C-b>"
endif

" Use CTRL-S for selections ranges.
" Requires 'textDocument/selectionRange' support of language server.
nmap <silent> <C-s> <Plug>(coc-range-select)
xmap <silent> <C-s> <Plug>(coc-range-select)

" Add `:Format` command to format current buffer.
command! -nargs=0 Format :call CocActionAsync('format')

" Add `:Fold` command to fold current buffer.
command! -nargs=? Fold :call     CocAction('fold', <f-args>)

" Add `:OR` command for organize imports of the current buffer.
command! -nargs=0 OR   :call     CocActionAsync('runCommand', 'editor.action.organizeImport')

" Add (Neo)Vim's native statusline support.
" NOTE: Please see `:h coc-status` for integrations with external plugins that
" provide custom statusline: lightline.vim, vim-airline.
set statusline^=%{coc#status()}%{get(b:,'coc_current_function','')}

" Mappings for CoCList
" Show all diagnostics.
nnoremap <silent><nowait> <space>a  :<C-u>CocList diagnostics<cr>
" Manage extensions.
nnoremap <silent><nowait> <space>e  :<C-u>CocList extensions<cr>
" Show commands.
nnoremap <silent><nowait> <space>c  :<C-u>CocList commands<cr>
" Find symbol of current document.
nnoremap <silent><nowait> <space>o  :<C-u>CocList outline<cr>
" Search workspace symbols.
nnoremap <silent><nowait> <space>s  :<C-u>CocList -I symbols<cr>
" Do default action for next item.
nnoremap <silent><nowait> <space>j  :<C-u>CocNext<CR>
" Do default action for previous item.
nnoremap <silent><nowait> <space>k  :<C-u>CocPrev<CR>
" Resume latest coc list.
nnoremap <silent><nowait> <space>p  :<C-u>CocListResume<CR>


" Coc Snippets """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""

" Use <C-l> for trigger snippet expand.
imap <C-l> <Plug>(coc-snippets-expand)

" Use <C-j> for select text for visual placeholder of snippet.
vmap <C-j> <Plug>(coc-snippets-select)

" Use <C-j> for jump to next placeholder, it's default of coc.nvim
let g:coc_snippet_next = '<c-j>'

" Use <C-k> for jump to previous placeholder, it's default of coc.nvim
let g:coc_snippet_prev = '<c-k>'

" Use <C-j> for both expand and jump (make expand higher priority.)
imap <C-j> <Plug>(coc-snippets-expand-jump)

" Use <leader>x for convert visual selected code to snippet
xmap <leader>x  <Plug>(coc-convert-snippet)

inoremap <silent><expr> <TAB>
      \ pumvisible() ? coc#_select_confirm() :
      \ coc#expandableOrJumpable() ? "\<C-r>=coc#rpc#request('doKeymap', ['snippets-expand-jump',''])\<CR>" :
      \ <SID>check_back_space() ? "\<TAB>" :
      \ coc#refresh()

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

let g:coc_snippet_next = '<tab>'


" Coc Explorer """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
:nnoremap <space>e :CocCommand explorer<CR>

let g:coc_explorer_global_presets = {
\   '.vim': {
\     'root-uri': '~/.vim',
\   },
\   'cocConfig': {
\      'root-uri': '~/.config/coc',
\   },
\   'tab': {
\     'position': 'tab',
\     'quit-on-open': v:true,
\   },
\   'tab:$': {
\     'position': 'tab:$',
\     'quit-on-open': v:true,
\   },
\   'floating': {
\     'position': 'floating',
\     'open-action-strategy': 'sourceWindow',
\   },
\   'floatingTop': {
\     'position': 'floating',
\     'floating-position': 'center-top',
\     'open-action-strategy': 'sourceWindow',
\   },
\   'floatingLeftside': {
\     'position': 'floating',
\     'floating-position': 'left-center',
\     'floating-width': 50,
\     'open-action-strategy': 'sourceWindow',
\   },
\   'floatingRightside': {
\     'position': 'floating',
\     'floating-position': 'right-center',
\     'floating-width': 50,
\     'open-action-strategy': 'sourceWindow',
\   },
\   'simplify': {
\     'file-child-template': '[selection | clip | 1] [indent][icon | 1] [filename omitCenter 1]'
\   },
\   'buffer': {
\     'sources': [{'name': 'buffer', 'expand': v:true}]
\   },
\ }

" Use preset argument to open it
nnoremap <space>ed :CocCommand explorer --preset .vim<CR>
nnoremap <space>ef :CocCommand explorer --preset floating<CR>
nnoremap <space>ec :CocCommand explorer --preset cocConfig<CR>
nnoremap <space>eb :CocCommand explorer --preset buffer<CR>

" List all presets
nnoremap <space>el :CocList explPresets