" ~/.vimrc
"
" caveats in config start with XXX
"
" ~ M. Thomas

let mapleader = "\<Space>"

" ============================== 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 ~/.vimrc
endif

call plug#begin()

" essentials
Plug 'jiangmiao/auto-pairs'             " pair completion
Plug 'tpope/vim-fugitive'               " git(1) command wrapper
Plug 'mhinz/vim-signify'                " show lines changed in git(1)
Plug 'tpope/vim-commentary'             " DWIM comments
Plug 'sheerun/vim-polyglot'             " language packs (highlighting, indent)

" nice to have
Plug 'metakirby5/codi.vim'              " interactive python (:Codi and :Codi!)

Plug 'junegunn/fzf', { 'do': { -> fzf#install()  }  }
Plug 'junegunn/fzf.vim'

if executable('cargo')
    " XXX requires locally installed lsp's (see LSP section)
    Plug 'autozimu/LanguageClient-neovim', {
        \ 'branch': 'next',
        \ 'do': 'bash install.sh',
        \ }
endif

" colors
Plug 'sainnhe/everforest'               " color scheme
Plug 'vim-airline/vim-airline'          " nicer status line
Plug 'vim-airline/vim-airline-themes'   " auto settings theme for airline

call plug#end()

" ============================== Colors
syntax on
set background=light
let g:everforest_background = 'medium'
let g:everforest_better_performance = 1
colorscheme everforest
let &t_8f = "\<Esc>[38;2;%lu;%lu;%lum"
let &t_8b = "\<Esc>[48;2;%lu;%lu;%lum"
set termguicolors

" ============================== General
filetype indent plugin on
set number                     " show line number
set relativenumber             " show relative line number
set cursorline                 " highlight current line
set ruler                      " show line and row at bottom right
set colorcolumn=80
set nowrap                     " don't wrap lines

set showmatch                  " highlights paranthesis
set hidden                     " allow moving to a new buffer without saving
set noswapfile                 " don't create a swap file
set confirm                    " can't quit without saving
set noshowmode                 " don't show mode in status
set noshowcmd                  " don't show command in status
set encoding=utf-8
set mouse=a                    " a=on, c=off
set undolevels=1337
set backspace=indent,eol,start " always delete with backspace
set wildmenu                   " autocomplete :e
set scrolloff=5                " minimum lines above or below the cursor

autocmd FileType c setlocal tabstop=4 shiftwidth=4 noexpandtab

let g:ctrlp_show_hidden = 1    " show hidden files in ctrlp menus
let g:fzf_preview_window = ['down,50%', 'ctrl-/']

" ============================== Statusline
let g:airline_powerline_fonts = 1
let g:airline_mode_map = {
    \ 'i'      : '',
    \ 'ic'     : '',
    \ 'ix'     : '',
    \ 'n'      : '',
    \ 'multi'  : '並',
    \ 'ni'     : '',
    \ 'no'     : '',
    \ 'R'      : 'ﰇ',
    \ 'Rv'     : 'ﰇ',
    \ 'v'      : '',
    \ 'V'      : '  ',
    \ ''     : ' ',
    \ 'c'      : ''
    \ }

let g:airline_section_x = airline#section#create([])
let g:airline_section_y = airline#section#create_right(['%{&fileencoding}', '%{&fileformat}', '%{&filetype}'])
let g:airline_section_z = airline#section#create(['%{line(".")}:%{col(".")}'])

" ============================== Indents and Whitespaces
set list
set listchars=tab:──\ ,extends:›,precedes:‹,nbsp:·,trail:· " show chars for whitespaces
set fillchars+=vert:\                                      " don't draw verticle split

" show trailing whitespaces in red
highlight ExtraWhitespace ctermbg=red guibg=red
match ExtraWhitespace /\s\+\%#\@<!$/

" ============================== Search
set incsearch  " incremental search
set ignorecase " ignore case
set smartcase  "  -> unless capitol letters
set hlsearch   " highlight all results
set mat=5

" ============================== Cursor Thiccness
let &t_SI = "\<Esc>[6 q"
let &t_SR = "\<Esc>[4 q"
let &t_EI = "\<Esc>[2 q"

" ============================== netrw
let g:netrw_winsize = 25  " width
let g:netrw_liststyle = 3 " Tree-like structure
let g:netrw_banner = 0    " Remove useless banner at the top of netrw

" ============================== Macros and Mappings

" im a lazy brick
cabbrev g Git
cabbrev mktex latexmk -xelatex -shell-escape

" search git tracked files via git-ls-files(1)
map <C-p> :GFiles<CR>

" search in git tracked files with git-grep(1)
command! -bang -nargs=* GGrep
  \ call fzf#vim#grep(
  \   'git grep --line-number -- '.shellescape(<q-args>), 0,
  \   fzf#vim#with_preview(), <bang>0)
map <C-f> :GGrep 

" kill whitespaces fast and efficient
fun! TrimWhitespace()
    let l:save = winsaveview()
    keeppatterns %s/\s\+$//e
    call winrestview(l:save)
endfun
noremap <leader>ws :call TrimWhitespace()<CR>

" sometimes lsp discards message too quickly
map <C-M> :messages<CR>

" comment DWIM
map <C-_> :Commentary<CR>

" clear search highlighting faster
map <esc> :noh <CR>

" Codi
cabbrev py CodiNew python
map <C-i> :Codi!!<CR>

" ============================== LSP
set hidden
let g:LanguageClient_serverCommands = {
    \ 'rust': ['rust-analyzer'],
    \ 'python': ['pylsp'],
    \ 'c': ['clangd'],
    \ 'cpp': ['clangd'],
    \ 'yaml': ['yaml-lsp'],
    \ }

nnoremap <C-l> :call LanguageClient_contextMenu()<CR>
map <F2> :call LanguageClient#textDocument_rename()<CR>
map <F12> :call LanguageClient#textDocument_definition()<CR>
map <C-h> :call LanguageClient#textDocument_hover()<CR>

" completion suggestions mapped to <C-Space>
inoremap <C-space>   <C-x><C-o>
imap     <C-@>       <C-space>