init.vim

" Plugins 
call plug#begin()
" Autocomletion
Plug 'neoclide/coc.nvim', {'branch': 'release'} 

" dynamic finders
Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
Plug 'junegunn/fzf.vim'
Plug 'nvim-lua/plenary.nvim'
Plug 'nvim-telescope/telescope.nvim'

" syntax highlighting
Plug 'nvim-treesitter/nvim-treesitter', {'do': ':TSUpdate'}

" statusline
Plug 'ryanoasis/vim-devicons'
Plug 'vim-airline/vim-airline'
Plug 'vim-airline/vim-airline-themes'

" plugin for comment
Plug 'numToStr/Comment.nvim'

" file explorer
Plug 'kyazdani42/nvim-web-devicons'
Plug 'kyazdani42/nvim-tree.lua'

" auto pairs
Plug 'jiangmiao/auto-pairs'

" git support
Plug 'airblade/vim-gitgutter'
Plug 'tpope/vim-fugitive'

" themes
Plug 'sainnhe/gruvbox-material'
Plug 'morhetz/gruvbox'
call plug#end()

" Let's make it beautiful
set number
set cc=81
set background=dark
set termguicolors

" Tab settings 
set tabstop=4
set softtabstop=4
set shiftwidth=4
set expandtab

" Basic settings 
set encoding=utf-8
set updatetime=300
set hidden
set nobackup
set nowritebackup
set noswapfile
set mouse=a

" leader
let mapleader = ","

" telescope setups
lua << END
require('telescope').setup()
END

" Comment setups
lua << END
require('Comment').setup()
END

" nvim-treesitter settings
lua << END
require('nvim-treesitter.configs').setup {
  ensure_installed = { "cpp", "python", "vim", "lua" },
  sync_install = false,
  highlight = {
    -- `false` will disable the whole extension
    enable = true,
  },
}
END

" NvimTree options
lua << END
require('nvim-tree').setup()
END
nnoremap <C-n> :NvimTreeToggle<CR>
nnoremap <leader>r :NvimTreeRefresh<CR>
nnoremap <leader>n :NvimTreeFindFile<CR>

" Python settings
let g:python3_host_prog = '/data/data/com.termux/files/usr/bin/python3'

" Theme options
let g:gruvbox_material_palette = 'mix'
let g:gruvbox_material_disable_italic_comment = 1

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

" Coc settings

" 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>" :
      \ <SID>check_back_space() ? "\<TAB>" :
      \ coc#refresh()
inoremap <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.
if has('nvim')
  inoremap <silent><expr> <c-space> coc#refresh()
else
  inoremap <silent><expr> <c-@> coc#refresh()
endif

" Make <Enter> 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> <Enter> pumvisible() ? coc#_select_confirm()
                              \: "\<C-g>u\<Enter>\<c-r>=coc#on_enter()\<Enter>"

" 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 <SID>show_documentation()<CR>

function! s:show_documentation()
  if (index(['vim','help'], &filetype) >= 0)
    execute 'h '.expand('<cword>')
  elseif (coc#rpc#ready())
    call CocActionAsync('doHover')
  else
    execute '!' . &keywordprg . " " . expand('<cword>')
  endif
endfunction

" 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)

" 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)

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

" 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')


" Set Theme
colorscheme gruvbox-material