filetype off
set autochdir "working directory is always directory of current file
filetype plugin on "netrw file browser
filetype plugin indent on
"set mouse=a

"vim-plug
call plug#begin()
    Plug 'junegunn/limelight.vim'
    Plug 'neoclide/coc.nvim', {'branch': 'release'}
    Plug 'sheerun/vim-polyglot'

call plug#end()

"mapping setup
let mapleader="," "leader is comma

    "echodoc config
"set cmdheight=2
let g:echodoc#enable_at_startup = 1
"let g:echodoc#type = 'virtual'

    "limelight config
let g:limelight_conceal_ctermfg = 1
nnoremap <leader>l :Limelight!! 0.85<CR>

    "python-syntax config
let g:python_highlight_all = 1

    "start python language server
if executable('pyls')
    " pip install python-language-server
    au User lsp_setup call lsp#register_server({
        \ 'name': 'pyls',
        \ 'cmd': {server_info->['pyls']},
        \ 'whitelist': ['python'],
        \ 'workspace_config': {'pyls': {'plugins': {'pydocstyle': {'enabled': v:true}}}}
        \ })
endif

	"coc config
inoremap <expr><tab> pumvisible() ? "\<c-n>" : "\<tab>"
inoremap <expr><S-tab> pumvisible() ? "\<c-p>" : "\<tab>"
set hidden
set nobackup
set nowritebackup
set updatetime=300
set shortmess+=c
set signcolumn=yes

        "tab mapping
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
        "enter confirms completion
inoremap <expr> <cr> pumvisible() ? "\<C-y>" : "\<C-g>u\<CR>"

        "goto's
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)

        "documentation bound to ,d
nnoremap <leader>d :call <SID>show_documentation()<CR>
function! s:show_documentation()
  if (index(['vim','help'], &filetype) >= 0)
    execute 'h '.expand('<cword>')
  else
    call CocAction('doHover')
  endif
endfunction

        "rename bound to ,r
nmap <leader>r <Plug>(coc-rename)

"mapping
    "map jk to ESC to save time
inoremap jk <esc>

    "map ,f to open netrw in a vertical split
nnoremap <leader>f :Vexplore<CR>
    "map ,F to open netrw
nnoremap <leader>F :Explore<CR>

    "map ,t to make new tab and explore
nnoremap <leader>t :tab split<CR>:Explore<CR>
    "map ,T to make new tab with same file
nnoremap <leader>T :tab split<CR>
    "map ,w to close tab
nnoremap <leader>w :tabclose<CR>
    "map J to previous tab
nnoremap J :tabp<CR>
    "map K to next tab
nnoremap K :tabn<CR>

nnoremap <leader>V :e ~/.config/nvim/init.vim<CR>

    "clear search highlight after search and fix paste insert mode
nnoremap <leader><space> :nohlsearch<CR>:set nopaste<CR>

    "map j and k to move visually on wrapped lines
nnoremap j gj
nnoremap k gk

    "map <C-k> and <C-j> to cycle windows
nnoremap <C-k> <C-w><C-W>
nnoremap <C-j> <C-w><S-w>

"tab settings
set autoindent "maintain indentation from previous line
set expandtab "replace tabs with spaces
set tabstop=4 "amount of spaces in a tab character
set softtabstop=4 "amount of spaces inserted when tabbing
set shiftwidth=4 "changes >> and <<, automatic indentation
set linebreak "word wrapping

"visual
"if empty($TMUX) && empty($STY)
"  " See https://gist.github.com/XVilka/8346728.
"  if $COLORTERM =~# 'truecolor' || $COLORTERM =~# '24bit'
"    if has('termguicolors')
"      " See :help xterm-true-color
"      if $TERM =~# '^screen'
"        let &t_8f = "\<Esc>[38;2;%lu;%lu;%lum"
"        let &t_8b = "\<Esc>[48;2;%lu;%lu;%lum"
"      endif
"      set termguicolors
"    endif
"  endif
"endif

    "scheme
set termguicolors
"set background=dark
"colorscheme modest
colorscheme fadedwolf

syntax enable "explanatory
set relativenumber "line numbers aren't absolute
set nu rnu "hybrid line numbers
set showcmd "show command being typed
set cursorline "highlight line being edited
set wildmenu "visual autocomplete for commands
set lazyredraw "optimization, especially for macros
set showmatch "highlight matching [{()}]

"folding
set foldmethod=syntax

"searching
set path+=** "search downward with depth of 30 from working dir, **n changes the amount of layers
set incsearch "search as you enter characters
set hlsearch "highlight matches

"netrw
let g:netrw_liststyle = 3 "change default directory view
let g:netrw_banner = 0 "banner off on startup, I to view