set background=dark
syntax on
filetype plugin indent on

let mapleader=','

" netrw
let g:netrw_banner = 0
let g:netrw_liststyle = 1
let g:netrw_list_hide = '^\.'
let g:netrw_winsize=25
map <leader>n <esc>:Lexplore<cr>

" fix helptags for opt/ plugins
" https://vi.stackexchange.com/questions/17210/generating-help-tags-for-packages-that-are-loaded-by-vim-8s-package-management
command! -nargs=0 -bar Helptags
    \  for p in glob('~/.vim/pack/git-plugins/opt/*', 1, 1)
    \|     exe 'packadd ' . fnamemodify(p, ':t')
    \| endfor
    \| helptags ALL

set shiftwidth=2
set shiftround
set tabstop=2
set expandtab
set smarttab
set splitbelow
set splitright
set encoding=utf-8
set hidden
set history=1000
set nowrap
set smartindent
set copyindent
set autoindent
set hlsearch
set showmatch
set wildmenu
set wildmode=list:full,full
set number
set relativenumber
set ruler
set backspace=indent,eol,start
set ignorecase
set smartcase
set incsearch
set history=1000
set undolevels=1000
set title
set novisualbell
set noerrorbells
set nobackup
set noswapfile
set ttymouse=sgr
set mouse=a
set mousemodel=popup_setpos
set lazyredraw
set timeoutlen=1000
set ballooneval
set balloonevalterm
set scrolloff=15
set dictionary=/usr/share/dict/words
set shortmess+=I
set updatetime=250
set pastetoggle=<f2>
" See :help thesaurus
set thesaurus=$HOME/Documents/thesaurus/thesaurus_pkg/thesaurus.txt
set pumheight=200
set completeopt=menu,menuone,popup,noselect
set completepopup=width:300,height:50,align:item,border:off

" Enable 24-bit colours.
" https://github.com/alacritty/alacritty/issues/109#issuecomment-440353106
if exists('+termguicolors')
  let &t_8f="\<Esc>[38;2;%lu;%lu;%lum"
  let &t_8b="\<Esc>[48;2;%lu;%lu;%lum"
  set termguicolors
endif

" Colour scheme:
packadd! gruvbox
let g:gruvbox_contrast_dark='medium'
let g:gruvbox_contrast_light='soft'
let g:gruvbox_improved_strings=1
let g:gruvbox_improved_warnings=1
let g:gruvbox_vert_split='bg2'
colorscheme gruvbox

function! SwitchBackground()
  if &background == 'dark'
    set background=light
    let g:lightline.colorscheme = 'solarized'
    call lightline#init()
    call lightline#colorscheme()
    call lightline#update()
  else
    set background=dark
    let g:lightline.colorscheme = 'seoul256'
    call lightline#init()
    call lightline#colorscheme()
    call lightline#update()
  endif
endfunction

augroup vimrc
  autocmd!
  " Automatically load/save views on files.
  " https://vi.stackexchange.com/posts/13874/revisions
  autocmd BufWinLeave,BufLeave,BufWritePost,BufHidden,QuitPre ?* nested silent! mkview!
  autocmd BufWinEnter ?* silent! loadview
  " set cursor line highlight in insert mode.
  autocmd InsertEnter * set cul
  autocmd InsertLeavePre * set nocul
  " use tabs in .gitconfig
  autocmd BufEnter .gitconfig setlocal shiftwidth=2 tabstop=2 noexpandtab
  " Quickfix window is always full-width.
  " https://github.com/fatih/vim-go/issues/1757#issuecomment-565130503
  autocmd FileType qf if (getwininfo(win_getid())[0].loclist != 1) | wincmd J | endif
augroup end

" But, don't remember the current directory for a given file:
set viewoptions-=curdir

" Key mappings:
nmap <silent> ,/ :nohlsearch<CR>
nnoremap j gj
nnoremap k gk
map <up> <nop>
map <down> <nop>
map <left> <nop>
map <right> <nop>
imap <up> <nop>
imap <down> <nop>
imap <left> <nop>
imap <right> <nop>
nmap ]q :cn<cr>
nmap [q :cp<cr>

nnoremap <silent> ,/ :nohlsearch<cr>
map <c-t> <esc>:tabnew<cr>
" Select just-pasted text:
nnoremap <silent> <leader>0 `[v`]
nnoremap <silent> <leader>1 :set relativenumber!<cr>
nnoremap <silent> <leader>2 :call SwitchBackground()<cr>
map <leader>m :marks<cr>
map <leader>R :ALERename<cr>
map <leader>v :vsplit<cr>
map <leader>s :split<cr>
map <leader>! <esc>:only<cr>
" ctrl-c to unload a buffer
nnoremap <silent> <c-q> :bp\|bd #<cr>

function! ToggleQuickFix()
  if empty(filter(getwininfo(), 'v:val.quickfix'))
    copen
  else
    cclose
  endif
endfunction
nmap <silent> <leader>q :call ToggleQuickFix()<cr>
nmap <silent> <leader>l :lclose<cr>

" deoplete configuration
packadd! deoplete.nvim
" Disable completion messages:
set shortmess+=c
let g:deoplete#enable_at_startup = 1
call deoplete#custom#option('num_processes', 6)
call deoplete#custom#option('max_list', 250)
call deoplete#custom#option('auto_complete_delay', 0)
call deoplete#custom#option('auto_refresh_delay', 250)
call deoplete#custom#option('refresh_always', v:false)
call deoplete#custom#option('omni_patterns', {
\ 'go': '[^. *\t]\.\w*',
\})
" <TAB>: completion.
inoremap <expr><S-Tab>  pumvisible() ? "\<C-p>" : "\<S-Tab>"
inoremap <expr><Tab>  pumvisible() ? "\<C-n>" : "\<Tab>"
inoremap <expr><C-]> pumvisible() ? "\<C-]>" : "\<Enter>"

" vim-markdown configuration:
let g:vim_markdown_conceal = 1

" fzf configuration:
nmap <leader>t :Files<cr>
nmap <leader>T :GFiles<cr>
nmap <leader>b :Buffers<cr>
nmap <leader>gg :Rg<cr>

" Lightline configuration:
packadd! lightline.vim
function! GitHead()
  return '[' . FugitiveHead() . ']'
endfunction

set laststatus=2
let g:lightline = {
      \ 'colorscheme': 'seoul256',
      \ 'active': {
      \   'left': [ [ 'mode', 'paste' ],
      \             [ 'readonly', 'filename', 'modified' ],
      \             [ 'gitbranch' ] ],
      \   'right': [ ['lineinfo'], ['percent'], ['filetype'], ['gobuild'] ],
      \ },
      \ 'component_function': {
      \   'gobuild': 'go#statusline#Show',
      \   'gitbranch': 'GitHead',
      \ },
      \ 'mode_map': {
      \   'n' : 'N',
      \   'i' : 'I',
      \   'R' : 'R',
      \   'v' : 'V',
      \   'V' : 'V-LINE',
      \   "\<C-v>": 'V-BLOCK',
      \   'c' : 'C',
      \   's' : 'S',
      \   'S' : 'S-LINE',
      \   "\<C-s>": 'S-BLOCK',
      \   't': 'TERM',
      \ },
\ }

" vim-gitgutter configuration
packadd! vim-gitgutter
set signcolumn=yes
nnoremap hg :GitGutterLineHighlightsToggle<cr>
nmap ]h <Plug>(GitGutterNextHunk)
nmap [h <Plug>(GitGutterPrevHunk)
omap ih <Plug>(GitGutterTextObjectInnerPending)
omap ah <Plug>(GitGutterTextObjectOuterPending)
xmap ih <Plug>(GitGutterTextObjectInnerVisual)
xmap ah <Plug>(GitGutterTextObjectOuterVisual)

" Vim-Rust configuration:
let g:rustfmt_autosave = 1

" echodoc configuration:
set cmdheight=1
set noshowmode
let g:echodoc#type='echo'
let g:echodoc#enable_at_startup = 1
packadd! echodoc.vim

" ALE configuration:
nmap [L <Plug>(ale_first)
nmap ]L <Plug>(ale_last)
nmap [e <Plug>(ale_previous_wrap_error)
nmap ]e <Plug>(ale_next_wrap_error)
nmap [w <Plug>(ale_previous_wrap)
nmap ]w <Plug>(ale_next_wrap)

nmap <leader>ad :ALEDetail<cr>
map <Leader>g :ALEGoToDefinition<CR>
map <Leader>f :ALEFindReferences<CR>
map <Leader>fv :ALEFindReferences -vsplit<CR>
map <Leader>fh :ALEFindReferences -split<CR>
map <Leader>ft :ALEFindReferences -tab<CR>
nnoremap gD :ALEGoToTypeDefinition<cr>
nnoremap gd :ALEGoToDefinition<cr>
command GoToDefinition ALEGoToDefinition
command GoToTypeDefinition ALEGoToTypeDefinition
command FindReferences ALEFindReferences
command Rename ALERename

let g:ale_sign_column_always = 1
let g:ale_fix_on_save = 1
let g:ale_lint_on_text_changed = 1
let g:ale_lint_on_enter = 1
let g:ale_lint_on_insert_leave = 1
let g:ale_lint_on_save = 1
let g:ale_echo_cursor = 1
let g:ale_lint_delay = 100
let g:ale_lsp_suggestions = 1
let g:ale_set_balloons = 1
" NOTE: Needs https://github.com/dense-analysis/ale/issues/3350
let g:ale_rust_analyzer_config = {
      \ 'diagnostics': { 'disabled': ['unresolved-import'] },
      \ 'cargo': { 'loadOutDirsFromCheck': v:true },
      \ 'procMacro': { 'enable': v:true },
      \ 'checkOnSave': { 'command': 'clippy', 'enable': v:true },
      \ }
let g:ale_go_goimports_options = '-local github.com/sensiblecodeio/cantabular'
let g:ale_go_gopls_init_options = {
      \ 'ui.diagnostic.analyses': {
      \   'composites': v:false,
      \   'unusedparams': v:true,
      \   'unusedresult': v:true,
      \   'shadow': v:true,
      \ },
      \ 'staticcheck': v:true}
" let g:ale_command_wrapper = 'nice -n5'
let g:ale_completion_enabled = 0
let g:ale_close_preview_on_insert = 1
let g:ale_hover_to_preview = 1
let g:ale_history_log_output = 0
let g:ale_linters = {
      \ 'javascript': ['eslint'],
      \ 'go': ['gopls'],
      \ 'rust': ['analyzer'],
      \ 'css': ['stylelint'],
      \ 'python': ['pyls'],
      \ 'ruby': ['rubocop'],
      \ }
let g:ale_fixers = {
      \ '*': ['remove_trailing_lines', 'trim_whitespace'],
      \ 'javascript': ['prettier'],
      \ 'rust': [],
      \ 'go': [],
      \ 'css': ['stylelint'],
      \ 'python': ['autopep8'],
      \ 'ruby': ['rubocop'],
      \ }

" load internal plugins:
runtime macros/matchit.vim

" load ALE only after configured:
packadd! ale

" load other plugins:
packadd! tmux-complete.vim
packadd! vim-commentary
" Requires both fzf.vim plugin to be manually installed:
" https://github.com/junegunn/fzf/blob/master/plugin/fzf.vim
" and also this separate plugin, which is loaded here:
packadd! fzf.vim
packadd! vim-go
packadd! vim-surround
packadd! vim-yaml-folds
packadd! vim-fugitive