" Fix cursor shape
" Reference: https://vim.fandom.com/wiki/Change_cursor_shape_in_different_modes#For_VTE_compatible_terminals_(urxvt,_st,_xterm,_gnome-terminal_3.x,_Konsole_KDE5_and_others),_wsltty_and_Windows_Terminal
let &t_SI = "\<Esc>[6 q"
let &t_SR = "\<Esc>[4 q"
let &t_EI = "\<Esc>[2 q"

" Fix color in some environments
if exists('+termguicolors')
    let &t_8f = "\<Esc>[38;2;%lu;%lu;%lum"
    let &t_8b = "\<Esc>[48;2;%lu;%lu;%lum"
    " maybe need to remove this in gnu screen
    set termguicolors
endif

" Add this if color doesn't work
" set term=xterm-256color

" Common stuff
set encoding=utf-8
set exrc
set undofile
set undodir=~/.vim/undofiles-vanilla  " you have to manually create this directory
set undolevels=10000
set undoreload=50000
" filetype off
set expandtab
set tabstop=4
set softtabstop=4
set shiftwidth=4
set splitright
set splitbelow
set selectmode=key
set keymodel=startsel
set number
set cursorline
set clipboard=unnamedplus  " not `+=` in vim
set updatetime=500
set whichwrap+=<,>,[,]
set relativenumber
set signcolumn=yes
set noequalalways
set scrolloff=10
set list
set listchars=trail:█
set noshowmode
set guicursor=n-v-c:block,i:ver25,a:blinkon0
set incsearch
set hlsearch
set mouse=a
set ttimeoutlen=0
set wildmenu
set wildoptions=fuzzy,pum
if has('nvim')
    " set signcolumn=yes:2
    " set cmdheight=0
    set pumblend=40
    set winblend=40
endif
if !has('nvim')
    set noesckeys
endif
" set updatetime=0

" legacy
set nocompatible
set backspace=indent,eol,start
set history=50
set ruler
" set nomodeline
" set clipboard=unnamed,unnamedplus
syntax on

" set number
" set relativenumber
" set cursorline
" set expandtab
" set tabstop=4
" set softtabstop=4
" set shiftwidth=4
set autoindent
set smartindent

let g:mapleader = " "

" Install vim-plug
let data_dir = '~/.vim'
if empty(glob(data_dir . '/autoload/plug.vim'))
  silent execute '!curl -fLo '.data_dir.'/autoload/plug.vim --create-dirs  https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim'
  autocmd VimEnter * PlugInstall --sync | source $MYVIMRC
endif

call plug#begin('~/.vim/plugged')

Plug 'morhetz/gruvbox'
Plug 'ayu-theme/ayu-vim'
Plug 'embark-theme/vim'
Plug 'tpope/vim-obsession'
Plug 'dhruvasagar/vim-prosession'
Plug 'vim-airline/vim-airline'
if has('nvim')
    Plug 'tzachar/local-highlight.nvim'
else
    Plug 'itchyny/vim-cursorword'
endif
Plug 'wakatime/vim-wakatime'
Plug 'tpope/vim-surround'
Plug 'tpope/vim-commentary'
Plug 'arielherself/vim-lsp'
Plug 'prabirshrestha/asyncomplete.vim'
Plug 'prabirshrestha/asyncomplete-lsp.vim'
" Plug 'Shougo/ddc.vim'
" Plug 'shun/ddc-vim-lsp'
Plug 'mattn/vim-lsp-settings'
Plug 'jdhao/better-escape.vim'
Plug 'jiangmiao/auto-pairs'
Plug 'easymotion/vim-easymotion'
Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
Plug 'junegunn/fzf.vim'
Plug 'rhysd/conflict-marker.vim'
Plug 'ryanoasis/vim-devicons'
" this plugin slows vim down when dealing
" with large files, so I switch to the Nvim version
" Plug 'airblade/vim-gitgutter'
if has('nvim')
    Plug 'lewis6991/gitsigns.nvim'
endif
Plug 'tpope/vim-fugitive'
Plug 'Yggdroot/indentLine'
Plug '907th/vim-auto-save'
Plug 'markonm/traces.vim'
Plug 'stevearc/oil.nvim'
Plug 'vim-scripts/LargeFile'

call plug#end()

" Color scheme
set background=dark
let g:embark_terminal_italics = 1
let ayucolor = "mirage"
silent! colorscheme embark

" vim-airline
let g:airline#extensions#tabline#enabled = 1
let g:airline_powerline_fonts = 1
nnoremap , <Cmd>bp<CR>
nnoremap . <Cmd>bn<CR>
nnoremap c <Cmd>Bclose<CR>

inoremap <expr> <Tab>   pumvisible() ? "\<C-n>" : "\<Tab>"
inoremap <expr> <S-Tab> pumvisible() ? "\<C-p>" : "\<S-Tab>"
inoremap <expr> <cr> pumvisible() ? asyncomplete#close_popup() . "\<cr>" : "\<cr>"

" LSP related
let g:asyncomplete_auto_popup = 1
let g:asyncomplete_popup_delay = 0
let g:lsp_completion_documentation_delay = 0
let g:lsp_diagnostics_echo_delay = 0
let g:lsp_diagnostics_highlights_delay = 0
let g:lsp_diagnostics_signs_delay = 0
let g:lsp_diagnostics_virtual_text_enabled = 0
let g:lsp_diagnostics_virtual_text_delay = 0
let g:lsp_document_code_action_signs_delay = 0
let g:lsp_inlay_hints_delay = 0
let g:lsp_document_highlight_delay = 0
let g:lsp_preview_max_width = 100
let g:lsp_diagnostics_float_cursor = 1
let g:lsp_diagnostics_float_delay = 600
let g:lsp_preview_autoclose = 1
let g:lsp_float_max_width = 100
let g:lsp_inlay_hints_enabled = 1
let g:lsp_diagnostics_virtual_text_padding_left = 12
let g:lsp_diagnostics_echo_cursor = 1
let g:lsp_settings = {
            \   'clangd': { 'cmd': [ 'clangd' ] },
            \}
function! s:truncate(str)
  if len(a:str) > 50
    return a:str[:50] . '...'
  else
    return a:str
  endif
endfunction
function! s:truncate_labels(options, matches) abort
    let l:items = []
    for [l:source_name, l:matches] in items(a:matches)
        let l:startcol = l:matches['startcol']
        let l:base = a:options['typed'][l:startcol - 1:]
        for l:item in l:matches['items']
            if stridx(l:item['word'], l:base) == 0
                if has_key(l:item, 'abbr')
                    let l:item['abbr'] = s:truncate(l:item['abbr'])
                endif
                call add(l:items, l:item)
            endif
        endfor
    endfor

    call asyncomplete#preprocess_complete(a:options, l:items)
endfunction
let g:asyncomplete_preprocessor = [function('s:truncate_labels')]

" Personal keybindings
if !has('nvim')
    tnoremap <Esc> <C-w>N
else
    tnoremap <ESC> <C-\><C-n>
endif
nnoremap <leader>w <Plug>(easymotion-bd-w)
vnoremap <leader>w <Plug>(easymotion-bd-w)
nnoremap <leader>o <Cmd>Files<CR>
nnoremap <leader>g <Cmd>Rg<CR>
nnoremap gpd <Cmd>LspPeekDefinition<CR>
nnoremap gd <Cmd>LspDefinition<CR>
nnoremap <leader>dd <Cmd>LspDocumentDiagnostics<CR>
nnoremap <leader>dn <Cmd>LspNextDiagnostic<CR>
nnoremap <leader>dp <Cmd>LspPreviousDiagnostic<CR>
nnoremap grr <Cmd>LspRename<CR>
nnoremap <leader>a <Cmd>LspCodeAction<CR>
nnoremap K <Cmd>LspHover<CR>
nnoremap Q q
nnoremap q <Nop>
inoremap <C-e> {<ESC>A}<ESC>%li<CR><ESC>$i<CR><ESC>k^i
vnoremap <C-j> dpV`]
vnoremap <C-k> dkPV`]
vnoremap <Tab> >gv
vnoremap <S-Tab> <gv
nnoremap <C-a> ggVG
nnoremap gy `[v`]
nnoremap <C-l> <Cmd>noh<CR>
if has('nvim')
    nnoremap <leader>` <Cmd>split<CR><Cmd>term zsh<CR>i
else
    nnoremap <leader>` <Cmd>split<CR><Cmd>term ++curwin zsh<CR>
endif
nnoremap <leader>x <Cmd>%s/\s\+$//e<CR>

""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" Bclose
" Delete buffer while keeping window layout (don't close buffer's windows).
" Version 2008-11-18 from http://vim.wikia.com/wiki/VimTip165
if v:version < 700 || exists('loaded_bclose') || &cp
  finish
endif
let loaded_bclose = 1
if !exists('bclose_multiple')
  let bclose_multiple = 1
endif

" Display an error message.
function! s:Warn(msg)
  echohl ErrorMsg
  echomsg a:msg
  echohl NONE
endfunction

" Command ':Bclose' executes ':bd' to delete buffer in current window.
" The window will show the alternate buffer (Ctrl-^) if it exists,
" or the previous buffer (:bp), or a blank buffer if no previous.
" Command ':Bclose!' is the same, but executes ':bd!' (discard changes).
" An optional argument can specify which buffer to close (name or number).
function! s:Bclose(bang, buffer)
  if empty(a:buffer)
    let btarget = bufnr('%')
  elseif a:buffer =~ '^\d\+$'
    let btarget = bufnr(str2nr(a:buffer))
  else
    let btarget = bufnr(a:buffer)
  endif
  if btarget < 0
    call s:Warn('No matching buffer for '.a:buffer)
    return
  endif
  if empty(a:bang) && getbufvar(btarget, '&modified')
    call s:Warn('No write since last change for buffer '.btarget.' (use :Bclose!)')
    return
  endif
  " Numbers of windows that view target buffer which we will delete.
  let wnums = filter(range(1, winnr('$')), 'winbufnr(v:val) == btarget')
  if !g:bclose_multiple && len(wnums) > 1
    call s:Warn('Buffer is in multiple windows (use ":let bclose_multiple=1")')
    return
  endif
  let wcurrent = winnr()
  for w in wnums
    execute w.'wincmd w'
    let prevbuf = bufnr('#')
    if prevbuf > 0 && buflisted(prevbuf) && prevbuf != btarget
      buffer #
    else
      bprevious
    endif
    if btarget == bufnr('%')
      " Numbers of listed buffers which are not the target to be deleted.
      let blisted = filter(range(1, bufnr('$')), 'buflisted(v:val) && v:val != btarget')
      " Listed, not target, and not displayed.
      let bhidden = filter(copy(blisted), 'bufwinnr(v:val) < 0')
      " Take the first buffer, if any (could be more intelligent).
      let bjump = (bhidden + blisted + [-1])[0]
      if bjump > 0
        execute 'buffer '.bjump
      else
        execute 'enew'.a:bang
      endif
    endif
  endfor
  execute 'bdelete'.a:bang.' '.btarget
  execute wcurrent.'wincmd w'
endfunction
command! -bang -complete=buffer -nargs=? Bclose call <SID>Bclose(<q-bang>, <q-args>)
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""

" indent guide
let g:indent_guides_enable_on_vim_startup = 1
let g:indent_guides_guide_size = 1

" indent line
let g:indentLine_char = ''
let g:indentLine_first_char = ''
let g:indentLine_showFirstIndentLevel = 1

" cursor word
let g:cursorword_delay = 1

let g:auto_save = 0

" recover cursor shape
autocmd VimLeave * silent !echo -ne "\e[6 q"

" fix split line color
set fillchars+=vert:\│
highlight VertSplit cterm=NONE
highlight VertSplit guifg=#585273

" airline styling
" ref: https://github.com/vim-airline/vim-airline/issues/323#issuecomment-27336312
let g:airline_left_sep = ''
let g:airline_left_alt_sep = ''
let g:airline_right_sep = ''
let g:airline_right_alt_sep = ''

if has('nvim')
    lua require('local-highlight').setup { cw_hlgroup = 'LspReferenceText' }
    lua require('gitsigns').setup { attach_to_untracked = true, current_line_blame = true, current_line_blame_opts = { delay = 0 } }
endif

" fix c++ comment style in Neovim
" ref: https://github.com/tpope/vim-commentary/issues/15#issuecomment-23127749
autocmd FileType c,cpp,cs,java setlocal commentstring=//\ %s

" Why?!
set noshowmode