syntax on
set number
set cursorline
set expandtab tabstop=4 shiftwidth=4 softtabstop=4
set autoindent
set spelllang=vi,en


" Fold
set foldmethod=syntax
set foldlevel=1
set foldnestmax=1
set encoding=utf8

" Search
set hlsearch
nnoremap i :nohls<CR>i

" Plugin
call plug#begin()
Plug 'neoclide/coc.nvim', {'branch': 'release'}
Plug 'dense-analysis/ale'
Plug 'preservim/nerdtree'
Plug 'preservim/nerdcommenter'
Plug 'lervag/vimtex'
Plug 'JuliaEditorSupport/julia-vim'
Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
Plug 'junegunn/fzf.vim'
Plug  'honza/vim-snippets'
Plug 'vim-airline/vim-airline'
Plug 'vim-airline/vim-airline-themes'
Plug 'kevinhwang91/nvim-bqf' 
Plug 'morhetz/gruvbox'
Plug 'tpope/vim-fugitive'
Plug 'ynkdir/vim-diff'
call plug#end()

"Color scheme
"colorscheme iceberg
"set background=light
colorscheme gruvbox
let g:gruvbox_contrast_light = 'hard'
let g:vimtex_view_general_viewer = 'okular'

"Open NERDTree
:nnoremap <silent> <expr> <F2> g:NERDTree.IsOpen() ? "\:NERDTreeClose<CR>" : bufexists(expand('%')) ? "\:NERDTreeFind<CR>" : "\:NERDTree<CR>"

"Coc.nvim
inoremap <silent><expr> <TAB>
            \ coc#pum#visible() ? coc#_select_confirm() :
            \ coc#expandableOrJumpable() ? "\<C-r>=coc#rpc#request('doKeymap', ['snippets-expand-jump',''])\<CR>" :
            \ CheckBackSpace() ? "\<TAB>" :
            \ coc#refresh()
inoremap <silent><expr> <cr> pumvisible() ? coc#_select_confirm()
            \: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"

function! CheckBackSpace() abort
    let col = col('.') - 1
    return !col || getline('.')[col - 1]  =~# '\s'
endfunction

let g:coc_snippet_next = '<tab>' 
inoremap <silent><expr> <CR> coc#pum#visible() ? coc#pum#confirm()
            \: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"

" Comments
let mapleader = ","

" remap save
nnoremap <space> :w<CR>

" moving between windows
nnoremap <C-h> <C-W>h
nnoremap <C-j> <C-W>j
nnoremap <C-k> <C-W>k
nnoremap <C-l> <C-W>l
nnoremap <C-Left> <C-W>h
nnoremap <C-Down> <C-W>j
nnoremap <C-Up> <C-W>k
nnoremap <C-Right> <C-W>l
nnoremap <leader>to :tabonly<CR>
nnoremap <leader>o :only<CR>
nnoremap <leader><tab> :tabn<CR>
nnoremap <S-tab> :tabp<CR>

"set clipboard+=unnamedplus
" " Copy to clipboard
vnoremap  <leader>y  "+y
nnoremap  <leader>Y  "+yg_
nnoremap  <leader>y  "+y
nnoremap  <leader>yy  "+yy

" " Paste from clipboard
nnoremap <leader>p "+p
nnoremap <leader>P "+P


" FZF key mapping
nnoremap <silent> <Leader>b :Buffers<CR>
nnoremap <silent> <Leader>r :Rg<CR>
nnoremap <silent> <Leader>f :Files<CR>
nnoremap <silent> <Leader>g :GFiles<CR>
nnoremap <silent> <Leader>w :Rg <C-R><C-W><CR>

filetype plugin on
set splitright
set splitbelow


"function! IBusOff()
"let g:ibus_prev_engine = system('ibus engine')
"" xkb : us :: eng (không có dấu cách)
"silent! execute '!ibus engine xkb🇺🇸:eng'
"endfunction



"function! IBusOn()
"let l:current_engine = system('ibus engine')
"if l:current_engine !~? 'xkb🇺🇸:eng'
"let g:ibus_prev_engine = l:current_engine
"endif
"" Khôi phục lại engine
"silent! execute '!ibus engine ' . g:ibus_prev_engine
"endfunction

"augroup IBusHandler
"autocmd CmdLineEnter [/?] silent call IBusOn()
"autocmd CmdLineLeave [/?] silent call IBusOff()
"autocmd CmdLineEnter \? silent call IBusOn()
"autocmd CmdLineLeave \? silent call IBusOff()
"autocmd InsertEnter * silent call IBusOn()
"autocmd InsertLeave * silent call IBusOff()
"augroup END

"silent call IBusOff()
"
let g:input_lang = system('fcitx5-remote')
function! FcitxOff()
    let l:input_status = system('fcitx5-remote')
    let g:input_lang = l:input_status
    if l:input_status == 2 "second input method
        silent! execute '!fcitx5-remote -c' 
    endif
endfunction

function! FcitxOn()
    let l:input_status = system('fcitx5-remote')
    if l:input_status == 1 
        if g:input_lang == 2
            silent! execute '!fcitx5-remote -o' 
        endif
    endif
endfunction


augroup fcitxHandler
    autocmd CmdLineEnter [/?] silent call FcitxOn()
    autocmd CmdLineLeave [/?] silent call FcitxOff()
    autocmd CmdLineEnter \? silent call FcitxOn()
    autocmd CmdLineLeave \? silent call FcitxOff()
    autocmd InsertEnter * silent call FcitxOn()
    autocmd InsertLeave * silent call FcitxOff()
augroup END
let g:vimtex_view_general_viewer = 'okular'

map <F3> :ALEToggle<CR>
"Use 24-bit (true-color) mode in Vim/Neovim when outside tmux.
"If you're using tmux version 2.2 or later, you can remove the outermost $TMUX check and use tmux's 24-bit color support
"(see < http://sunaku.github.io/tmux-24bit-color.html#usage > for more information.)
if (empty($TMUX))
    if (has("nvim"))
        "For Neovim 0.1.3 and 0.1.4 < https://github.com/neovim/neovim/pull/2198 >
        let $NVIM_TUI_ENABLE_TRUE_COLOR=1
    endif
    "For Neovim > 0.1.5 and Vim > patch 7.4.1799 < https://github.com/vim/vim/commit/61be73bb0f965a895bfb064ea3e55476ac175162 >
    "Based on Vim patch 7.4.1770 (`guicolors` option) < https://github.com/vim/vim/commit/8a633e3427b47286869aa4b96f2bfc1fe65b25cd >
    " < https://github.com/neovim/neovim/wiki/Following-HEAD#20160511 >
    if (has("termguicolors"))
        set termguicolors
    endif
endif