" Author : @MineralwaterXu
" Special Thanks : @theniceboy

" ===
" === Auto load for the first time
" ===

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



" ====================
" === Editor Setup ===
" ====================

" ===
" === Editor behavior
" ===

set number
set relativenumber
set cursorline
set wrap
set showcmd
set wildmenu
set hlsearch
set incsearch
set ignorecase
set smartcase



" ===
" === Basic Mappings
" ===

" set <LEADER> as <SPACE>
let mapleader=" "

" syntax
syntax on

" Save & quit
noremap Q :q<CR>
noremap S :w<CR>

" Open the vimrc file anytime
noremap <LEADER>rc :e ~/.config/nvim/init.vim<CR>

" Search
noremap <LEADER><CR> :nohlsearch<CR>



" ===
" === Cursor movement
" ===
"     ^
"     k
" < h   l >
"     j
"     v

" J/K keys for 5 times j/k (faster navigation)
noremap J 5j
noremap K 5k
noremap = nzz
noremap - Nzz



" ===
" === Window management
" ===

" Disable the default s key
noremap s <nop>

" split the screens to up (horizontal), down (horizontal), left (vertical), right (vertical)
map sk :set nosplitbelow<CR>:split<CR>:set splitbelow<CR>
map sj :set splitbelow<CR>:split<CR>
map sh :set nosplitright<CR>:vsplit<CR>:set splitright<CR>
map sl :set splitright<CR>:vsplit<CR>

" Resize splits with arrow keys
map <up> :res +5<CR>
map <down> :res -5<CR>
map <left> :vertical resize-5<CR>
map <right> :vertical resize+5<CR>

" Place the two screens up and down
noremap s[ <C-w>t<C-w>K
" Place the two screens side by side
noremap s] <C-w>t<C-w>H



" ===
" === MarkdownPreview Mappings
" ===
nmap <LEADER>mp <Plug>MarkdownPreview
nmap <LEADER>ms <Plug>MarkdownPreviewStop



" ===
" === Install Plugins with Vim-Plug
" ===

call plug#begin('~/.config/nvim/plugged')


" Pretty Dress
Plug 'bling/vim-bufferline'
Plug 'bpietravalle/vim-bolt'
Plug 'ajmwagar/vim-deus'

" Status line
Plug 'vim-airline/vim-airline'
Plug 'vim-airline/vim-airline-themes'

" Other visual enhancement
Plug 'ryanoasis/vim-devicons'
Plug 'luochen1990/rainbow'
Plug 'mg979/vim-xtabline'
Plug 'wincent/terminus'

" Markdown
Plug 'iamcco/markdown-preview.nvim', { 'do': { -> mkdp#util#install() }, 'for': ['markdown', 'vim-plug'] }
Plug 'dhruvasagar/vim-table-mode', { 'on': 'TableModeToggle', 'for': ['text', 'markdown', 'vim-plug'] }
Plug 'mzlogin/vim-markdown-toc', { 'for': ['gitignore', 'markdown', 'vim-plug'] }

" LaTeX
Plug 'lervag/vimtex'

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

" Undo Tree
Plug 'mbbill/undotree'

" COC
Plug 'neoclide/coc.nvim', {'branch': 'release'}

call plug#end()
set re=0



" ===
" === Dress up my vim
" ===
set termguicolors " enable true colors support
let $NVIM_TUI_ENABLE_TRUE_COLOR=1
"set background=dark
"let ayucolor="mirage"
"let g:oceanic_next_terminal_bold = 1
"let g:oceanic_next_terminal_italic = 1
"let g:one_allow_italics = 1

"color dracula
"color one
color deus
"color gruvbox
"let ayucolor="light"
"color ayu
"color xcodelighthc
"set background=light
"set cursorcolumn

hi NonText ctermfg=gray guifg=grey10
"hi SpecialKey ctermfg=blue guifg=grey70



" ===================== Start of Plugin Settings =====================



" ===
" === vim-airline-theme
" ===
let g:airline_theme= 'deus'
let g:airline_powerline_fonts = 1
let g:airline#extensions#tabline#enable = 1
let g:airline#extensions#branch#enable = 1

" ===
" === rainbow
" ===
let g:rainbow_active = 1



" ===
" === MarkdownPreview
" ===
let g:mkdp_auto_start = 0
let g:mkdp_auto_close = 0
let g:mkdp_refresh_slow = 1
let g:mkdp_command_for_global = 0
let g:mkdp_open_to_the_world = 0
let g:mkdp_open_ip = ''
let g:mkdp_echo_preview_url = 0
let g:mkdp_browser = ''
let g:mkdp_browserfunc = ''
let g:mkdp_preview_options = {
			\ 'mkit': {},
			\ 'katex': {},
			\ 'uml': {},
			\ 'maid': {},
			\ 'disable_sync_scroll': 0,
			\ 'sync_scroll_type': 'middle',
			\ 'hide_yaml_meta': 1
			\ }
let g:mkdp_markdown_css = ''
let g:mkdp_highlight_css = ''
let g:mkdp_port = ''
let g:mkdp_page_title = '「${name}」'



" ===
" === vim-table-mode
" ===
noremap <LEADER>tm :TableModeToggle<CR>



" ===
" === vim-markdown-toc
" ===
let g:vmt_cycle_list_item_markers = 1
let g:vmt_fence_text = 'TOC'
let g:vmt_fence_closing_text = '/TOC'




" ===
" === vimtex
" ===
let g:tex_flavor = 'latex'
autocmd TextChanged,TextChangedI <buffer> silent write



" ===
" === Undotree
" ===
noremap U :UndotreeToggle<CR>
let g:undotree_DiffAutoOpen = 1
let g:undotree_SetFocusWhenToggle = 1
let g:undotree_ShortIndicators = 1
let g:undotree_WindowLayout = 2
let g:undotree_DiffpanelHeight = 8
let g:undotree_SplitWidth = 24
function g:Undotree_CustomMap()
	nmap <buffer> k <plug>UndotreeNextState
	nmap <buffer> j <plug>UndotreePreviousState
	nmap <buffer> K 5<plug>UndotreeNextState
	nmap <buffer> J 5<plug>UndotreePreviousState
endfunc



" ===
" === coc.nvim
" ===
let g:coc_global_extensions = ['coc-json', 'coc-vimlsp']

" TextEdit might fail if hidden is not set.
set hidden

" Some servers have issues with backup files, see #649.
set nobackup
set nowritebackup

" Having longer updatetime (default is 4000 ms = 4 s) leads to noticeable
" delays and poor user experience.
set updatetime=100

" Don't pass messages to |ins-completion-menu|.
set shortmess+=c

" 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.
inoremap <silent><expr> <c-space> coc#refresh()

" Use <cr> to confirm completion, `<C-g>u` means break undo chain at current
" position. Coc only does snippet and additional edit on confirm.
" <cr> could be remapped by other vim plugin, try `:verbose imap <CR>`.
inoremap <expr> <cr> complete_info()["selected"] != "-1" ? "\<C-y>" : "\<C-g>u\<CR>"
nmap <silent> <LEADER>- <Plug>(coc-diagnostic-prev)
nmap <silent> <LEADER>= <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 <LEADER>h to show documentation in preview window.
nnoremap <silent> <LEADER>h :call <SID>show_documentation()<CR>

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

" Highlight the symbol and its references when holding the cursor.
autocmd CursorHold * silent call CocActionAsync('highlight')

" 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)

augroup mygroup
  autocmd!
  " Setup formatexpr specified filetype(s).
  autocmd FileType typescript,json setl formatexpr=CocAction('formatSelected')
  " Update signature help on jump placeholder.
  autocmd User CocJumpPlaceholder call CocActionAsync('showSignatureHelp')
augroup end

" Remap for do codeAction of selected region
function! s:cocActionsOpenFromSelected(type) abort
  execute 'CocCommand actions.open ' . a:type
endfunction
xmap <silent> <leader>a :<C-u>execute 'CocCommand actions.open ' . visualmode()<CR>
nmap <silent> <leader>a :<C-u>set operatorfunc=<SID>cocActionsOpenFromSelected<CR>g@

" 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)

" 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 CocAction('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     CocAction('runCommand', 'editor.action.organizeImport')

" Add (Neo)Vim's native statusline support.
" NOTE: Please see `:h coc-status` for integrations with external plugins that
" provide custom statusline: lightline.vim, vim-airline.
set statusline^=%{coc#status()}%{get(b:,'coc_current_function','')}

" Mappings for CoCList
" Show all diagnostics.
nnoremap <silent><nowait> <space>a  :<C-u>CocList diagnostics<cr>
" Manage extensions.
nnoremap <silent><nowait> <space>e  :<C-u>CocList extensions<cr>
" Show commands.
nnoremap <silent><nowait> <space>c  :<C-u>CocList commands<cr>
" Find symbol of current document.
nnoremap <silent><nowait> <space>o  :<C-u>CocList outline<cr>
" Search workspace symbols.
nnoremap <silent><nowait> <space>s  :<C-u>CocList -I symbols<cr>
" Do default action for next item.
nnoremap <silent><nowait> <space>j  :<C-u>CocNext<CR>
" Do default action for previous item.
nnoremap <silent><nowait> <space>k  :<C-u>CocPrev<CR>
" Resume latest coc list.
nnoremap <silent><nowait> <space>p  :<C-u>CocListResume<CR>
" ===================== End of Plugin Settings =====================


" ===
" === Necessary Commands to Execute
" ===
exec "nohlsearch"