" Plugin Manager {{{
	call plug#begin('~/.vim/plugged')
	
	Plug 'morhetz/gruvbox', {'rtp': 'vim'} " Color theme
	Plug 'junegunn/fzf'                    " Used for commands like :Commits, :History, :Files
	Plug 'junegunn/fzf.vim'
	Plug 'preservim/nerdtree'      " Browse directories (:NERDTree)
	Plug 'Raimondi/delimitMate'    " Autocomplete brackets and quotes
	Plug 'tomtom/tcomment_vim'     " Toggle comments (gc, gcc)
	Plug 'godlygeek/tabular'       " Line up text by a given character (:Tabularize /CHAR)
	Plug 'vim-syntastic/syntastic' " Syntax error checker
	Plug 'neoclide/coc.nvim', {'branch': 'release'} " IntelliSense practically
	Plug 'itchyny/lightline.vim'   " Statusline and tabline for Vim
	Plug 'tpope/vim-fugitive'      " git integration
	Plug 'mbbill/undotree'         " Easily interact with undo history
	Plug 'OmniSharp/omnisharp-vim' " C# tools (autocompletion, ...)
	Plug 'wakatime/vim-wakatime'   " Time tracking via wakaime.com 
	Plug 'dense-analysis/ale'      " Syntax checker via LSP
	Plug 'ryanoasis/vim-devicons'  " Icons on stuff like NERDTree
	Plug 'honza/vim-snippets'      " Ready snippets for some langauges
	Plug 'pseewald/vim-anyfold'    " Better folding
	Plug 'editorconfig/editorconfig-vim' " Support for EditorConfig
	Plug 'tpope/vim-eunuch'        " Easy UNIX shell commands
	Plug 'mg979/vim-visual-multi'  " Multiple line cursor (and other stuff)
	Plug 'zivyangll/git-blame.vim' " Show who last edited a line
	Plug 'kien/tabman.vim'         " Show open buffers
	Plug 'alvan/vim-closetag'      " Automatically add HTML closing tags
	Plug 'OrangeT/vim-csharp'
	Plug 'neovimhaskell/haskell-vim'
	Plug 'davidhalter/jedi-vim'
	Plug 'fatih/vim-go', { 'do': ':GoUpdateBinaries' }
	Plug 'digitaltoad/vim-pug'
	
	call plug#end()
" }}}

" Vim-anyfold + folding {{{
	filetype plugin indent on
	syntax on
	autocmd Filetype * AnyFoldActivate " activate for all filetypes
	autocmd FileType,BufRead vim,text,sh setlocal foldmethod=marker
	set foldlevel=99 " Open all folds by default
	autocmd FileType,BufRead vim,sh setlocal foldlevel=0
" }}}

" General {{{
	" Color scheme {{{
		colorscheme gruvbox
		set background=dark " Setting dark mode
		let g:gruvbox_contrast_dark='medium'
	" }}}
	
	" Identation {{{
		set tabstop=4    " Show tabs as 4 wide
		set shiftwidth=4 " Indent with 4 spaces
		
		autocmd BufRead,BufNewFile *.component.css set filetype=css
		autocmd FileType css,ts setlocal ts=2 sw=2 sts=0 expandtab " Tranform tabs in CSS and TS into 2 spaces
	" }}}
	
	" Character visuals {{{
		set list " Enabled customization of whitespace characters, so spaces, tabs, EOL, etc. (:h 'list')
		
		" Show tabs as a | with three spaces
		" DO NOT remove the trailing space in the next line!
		set listchars=tab:│\ 
	" }}}
	
	" Backspace and cursor {{{
		autocmd InsertEnter,InsertLeave * set cul! " Highlight current line, when in insert mode
		set backspace=indent,eol,start             " Better backspace functionality
		
		set scrolloff=0 " Don't keep any screen lines above or below the cursor
		set number      " Show line numbers to the left
		set mouse=a     " Mouse support
		
		" Thin cursor in insert mode in Gnome-Terminal (version >=3.16 ; also works with Terminator)
		if has("autocmd")
		  au VimEnter,InsertLeave * silent execute '!echo -ne "\e[1 q"' | redraw!
		  au InsertEnter,InsertChange *
		    \ if v:insertmode == 'i' | 
		    \   silent execute '!echo -ne "\e[5 q"' | redraw! |
		    \ elseif v:insertmode == 'r' |
		    \   silent execute '!echo -ne "\e[3 q"' | redraw! |
		    \ endif
		  au VimLeave * silent execute '!echo -ne "\e[ q"' | redraw!
		endif
	" }}}
	
	" Ctrl bindings {{{
		" Ctrl-Backspace deletes the previous word in insert mode.
		noremap! <C-BS> <C-w>
		noremap! <C-h> <C-w>
		
		" The usual Ctrl+s, Ctrl+v type of bindings
		" Partly taken from: https://gist.github.com/jshih/3423345
		vmap <C-c> "+yi<Esc>
		vmap <C-x> "+c<Esc>
		vmap <C-v> c<ESC>"+p<Esc>
		imap <C-v> <ESC>"+pa
		map <C-a> ggVG
		imap <C-z> <ESC>ui
		imap <C-r> <ESC><C-r>i
		"imap <C-S-z> <C-r> An impossible dream
		imap <C-s> <ESC>:w<CR>a
		nmap <C-S> <ESC>:w<CR>
		map <C-f> :set nomore<Bar>:ls<Bar>:set more<CR>:b<Space>
		
		" Use Ctrl + hjkl for navigation in insert mode
		" inoremap <C-h> <Left>
		" inoremap <C-j> <Down>
		" inoremap <C-k> <Up>
		" inoremap <C-l> <Right>
		
		" Go between tabs with Ctrl+l (tab to the right) and Ctrl+h (tab to the left)
		" nnoremap <C-l> :tabn<CR>
		" nnoremap <C-h> :tabp<CR>
	" }}}
	
	" Comand abbreviations {{{
		" Cyrilic (Bulgarian yawerty layout) support
		ca в w
		ca ва wa
		ca ь x
		ca ьа xa
		
		" The following works almost the same as normal :x and :xa, but can also close running jobs (e.g. terminal windows)
		ca x  w <bar> q!
		ca xa wa <bar> qa!
		
		" Open a terminal vim tab with tt and open a blank tab with te
		ca tt tab ter
		ca te tabe
	" }}}
	
	" Custom app open bindings {{{
		nnoremap <F8> :<C-u>call gitblame#echo()<CR>
		nnoremap = :tab ter ++close lazygit<CR>
	" }}}
	
	" Other bindings {{{
		" Don't get into insert mode after adding a line with o/O
		nnoremap o o<Esc>
		nnoremap O O<Esc>
		
		" Move a line up and down with Alt+k and Alt-j
		execute "set <M-j>=\ej"
		nnoremap <M-j> <ESC>:m+1<CR>
		execute "set <M-k>=\ek"
		nnoremap <M-k> <ESC>:m-2<CR>
	" }}}
	
	" Omni complition {{{
		" Omni completion supports C, HTML, CSS, JavaScript, PHP, Python, Ruby, SQL, XML
		set omnifunc=syntaxcomplete#Complete " Completion for all supported languages
		
		" Do omni completion from Ctrl+Space
		nnoremap <C-Space> <C-X><C-O>
	" }}} -------------------------<
	
	" Spell check mode {{{
		" When you press F6 it will toggle a "spell check mode", 
		" spell is activated and the colorscheme is changed
		nmap <F6> :call SpellCheckModeToggle()<CR>
		
		function! SpellCheckModeToggle()
			if g:colors_name == 'gruvbox'
				set spell
				colorscheme darkblue
			else
				set nospell
				colorscheme gruvbox
			endif
		endfunction
		
		" Scrolling (shows history) in terminal (except in lazygit)
		" Scroll up to activate it, and press a to deactivate it
		" Slightly modified version of: https://github.com/vim/vim/issues/2490#issuecomment-393973253
		function! ExitNormalMode()
			unmap <buffer> <silent> <RightMouse>
			call feedkeys("a")
		endfunction
		
		function! EnterNormalMode()
			if @% == '!lazygit'
				tunmap <silent> <ScrollWheelUp>
			elseif &buftype == 'terminal' && mode('') == 't'
				call feedkeys("\<c-w>N")
				call feedkeys("\<c-y>")
				map <buffer> <silent> <RightMouse> :call ExitNormalMode()<CR>
			endif
		endfunction
		
		tmap <silent> <ScrollWheelUp> <c-w>:call EnterNormalMode()<CR>
	" }}}
" }}}

" DelimitMate {{{
	let delimitMate_expand_cr = 1
	" Don't autocomplete diamond brackets in HTML (compatibility with closetag plugin)
	autocmd FileType html let b:delimitMate_matchpairs='(:),[:],{:}'
" }}}

" NERDTree {{{
	let NERDTreeCustomOpenArgs={'file':{'where':'t'}} " Open file in new tab, doesn't work only for double-click
	let NERDTreeShowHidden=1
	" Toggle NERDTree with Tab
	nmap <Tab> :NERDTreeToggle<CR>
	let NERDTreeIgnore=['\.swp$', '\~$'] " Ignore file, ending with .swp and ~
" }}}

" Undotree {{{
	" Toggle undotree with F5
	nmap <F5> :UndotreeToggle<CR>  
	
	if !exists('g:undotree_WindowLayout')
		let g:undotree_WindowLayout = 2
	endif
	
	" e.g. using 'd' instead of 'days' to save some space.
	if !exists('g:undotree_ShortIndicators')
		let g:undotree_ShortIndicators = 1
	endif
	
	" if set, let undotree window get focus after being opened, otherwise
	" focus will stay in current window.
	if !exists('g:undotree_SetFocusWhenToggle')
		let g:undotree_SetFocusWhenToggle = 1
	endif
	
	" tree node shape.
	if !exists('g:undotree_TreeNodeShape')
		let g:undotree_TreeNodeShape = '*'
	endif
	
	if !exists('g:undotree_DiffCommand')
		let g:undotree_DiffCommand = "diff"
	endif
" }}}

" Tabman {{{
	let g:tabman_toggle = '<S-Tab>'
	let g:tabman_side = 'right'
" }}}

" Syntastic {{{
	set statusline+=%#warningmsg#
	set statusline+=%{SyntasticStatuslineFlag()}
	set statusline+=%*
	
	let g:syntastic_always_populate_loc_list=1
	let g:syntastic_auto_loc_list=1
	let g:syntastic_check_on_open=1
	let g:syntastic_check_on_wq=0
" }}}

" Lightline {{{
	" Settings {{{
		set laststatus=2
		
		if !has('gui_running')
			set t_Co=256
		endif
		
		let g:lightline = { 
			\ 'enable': { 
			\   'statusline': 1, 
			\   'tabline': 1 
			\ },
			\ 'colorscheme': 'wombat',
			\ 'active': {
			\   'left': [ [ 'mode', 'paste' ],
			\             [ 'gitbranch', 'filename', 'charvaluehex', 'readonly', 'modified' ] ],
			\   'right': [ [ 'lineinfo' ],
			\              [ 'fileencoding', 'filetype'] ]
			\ },
			\ 'component': {
			\   'charvaluehex': '0x%B',
			\ },
			\ 'component_function': {
			\   'gitbranch': 'LightlineFugitive',
			\   'readonly': 'LightlineReadonly',
			\   'modified': 'LightlineModified',
			\   'filetype': 'LightlineFileType'
			\ },
			\ 'tabline': {
			\   'right': [[]]
			\ },
			\ 'tab': {
			\   'active': [ 'iconFilename','iconReadonly', 'iconModified' ],
			\   'inactive': [ 'iconFilename', 'iconReadonly', 'iconModified' ]
			\ },
			\ 'tab_component_function': {
			\   'iconFilename': 'LightlineTabFilename',
			\   'iconReadonly': 'LightlineTabReadonly',
			\   'iconModified': 'LightlineTabModified'
			\ },
			\ 'separator': { 'left': '', 'right': '' },
			\ 'subseparator': { 'left': '', 'right': '' },
			\ 'tabline_separator': { 'left': '▒', 'right': '' },
			\ 'tabline_subseparator': { 'left': '░' }
		\ }
	" }}}
	
	" Function modification {{{
		" Most of the following functions are just modification of source: 
		" Examples from doc file - https://github.com/itchyny/lightline.vim/blob/53176a0b75d6389d775d7bce0d494e58fc654f38/doc/lightline.txt#L583
		" Tab source code - https://github.com/itchyny/lightline.vim/blob/master/autoload/lightline/tab.vim
		
		function! LightlineFugitive()
			if exists('*FugitiveHead')
				let branch = FugitiveHead()
				return branch !=# '' ? ' '.branch : ''
			endif
				return ''
		endfunction
		
		function! LightlineReadonly()
			return &ft !~? 'help\|vimfiler' && &readonly ? '' : ''
		endfunction
		
		function! LightlineModified()
			return &ft =~ 'help\|vimfiler' ? '' : &modified ? '' : &modifiable ? '' : ''
		endfunction
		
		function! LightlineFileType()
			return strlen(&filetype) ? WebDevIconsGetFileTypeSymbol() . ' ' . &filetype : ''
		endfunction
		
		" Adds the filetype icon in tabs and limit their width
		function! LightlineTabFilename(n) abort
			let buflist = tabpagebuflist(a:n)
			let winnr = tabpagewinnr(a:n)
			let _ = (expand('#'.buflist[winnr - 1].':t') !=# '' ? expand('#'.buflist[winnr - 1].':t') : '[No Name]') 
			
			" Limit the width of tabs, so they don't go out of the screen
			let tabNameLengthMax = &columns/((tabpagenr('$') > 0 ? tabpagenr('$') : 0) + 5)
			
			return WebDevIconsGetFileTypeSymbol(_) . ' ' . _[0:tabNameLengthMax]
		endfunction
		
		function! LightlineTabReadonly(n) abort
			let winnr = tabpagewinnr(a:n)
			return gettabwinvar(a:n, winnr, '&readonly') ? '' : ''
		endfunction
		
		function! LightlineTabModified(n) abort
			let winnr = tabpagewinnr(a:n)
			return gettabwinvar(a:n, winnr, '&modified') ? '' : gettabwinvar(a:n, winnr, '&modifiable') ? '' : ''
		endfunction
	" }}}
" }}}

" Ale settings {{{
	let g:ale_linters = {
	\ 'cs': ['OmniSharp'],
	\}
	let b:ale_linters = ['cs']
" }}}

" vim-go {{{
	let g:go_highlight_extra_types = 1
	let g:go_highlight_space_tab_error = 1
	let g:go_highlight_trailing_whitespace_error = 1
	let g:go_highlight_operators = 1
	let g:go_highlight_functions = 1
	let g:go_highlight_function_parameters = 1
	let g:go_highlight_function_calls = 1
	let g:go_highlight_types = 1
	let g:go_highlight_fields = 1
	let g:go_highlight_variable_declarations = 1
	let g:go_highlight_variable_assignments = 1
" }}}

" OmniSharp settings {{{
	let g:syntastic_cs_checkers = ['code_checker']
	
	autocmd Filetype cs nmap <silent> <buffer> gd   : OmniSharpGotoDefinition<CR>
	autocmd Filetype cs nmap <silent> <buffer> gy   : OmniSharpTypeLookup<CR>
	autocmd Filetype cs nmap <silent> <buffer> gi   : OmniSharpFindImplementations<CR>
	autocmd Filetype cs nmap <silent> <buffer> gr   : OmniSharpFindUsages<CR>
	autocmd FileType cs nmap <silent> <buffer> <F2> : OmniSharpRename<CR>
	autocmd FileType cs nmap <silent> <buffer> ff   : OmniSharpCodeFormat<CR>
	autocmd FileType cs nmap <silent> <buffer> fu   : OmniSharpFixUsings<CR>
" }}}

" haskell-vim settings {{{
	let g:haskell_classic_highlighting = 1
	let g:haskell_enable_quantification = 1   " to enable highlighting of `forall`
	let g:haskell_enable_recursivedo = 1      " to enable highlighting of `mdo` and `rec`
	let g:haskell_enable_arrowsyntax = 1      " to enable highlighting of `proc`
	let g:haskell_enable_pattern_synonyms = 1 " to enable highlighting of `pattern`
	let g:haskell_enable_typeroles = 1        " to enable highlighting of type roles
	let g:haskell_enable_static_pointers = 1  " to enable highlighting of `static`
	let g:haskell_backpack = 1                " to enable highlighting of backpack keywords
" }}}

" COC settings {{{
	" All of the following is the example configuration with some values modified
	" https://github.com/neoclide/coc.nvim#example-vim-configuration
	
	" TextEdit might fail if hidden is not set.
	set hidden
	
	" Some servers have issues with backup files, see #649.
	set nobackup
	set nowritebackup
	
	" Give more space for displaying messages.
	set cmdheight=2
	
	" Having longer update time (default is 4000 ms = 4 s) leads to noticeable
	" delays and poor user experience.
	set updatetime=300
	
	" Don't pass messages to |ins-completion-menu|.
	set shortmess+=c
	
	" Always show the signcolumn, otherwise it would shift the text each time
	" diagnostics appear/become resolved.
	if has("patch-8.1.1564")
	  " Recently vim can merge signcolumn and number column into one
	  set signcolumn=number
	else
	  set signcolumn=yes
	endif
	
	" 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.
	if has('nvim')
	  inoremap <silent><expr> <c-space> coc#refresh()
	else
	  inoremap <silent><expr> <c-@> coc#refresh()
	endif
	
	" 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>`.
	if exists('*complete_info')
	  inoremap <expr> <cr> complete_info()["selected"] != "-1" ? "\<C-y>" : "\<C-g>u\<CR>"
	else
	  inoremap <expr> <cr> pumvisible() ? "\<C-y>" : "\<C-g>u\<CR>"
	endif
	
	" Use `[g` and `]g` to navigate diagnostics
	" Use `:CocDiagnostics` to get all diagnostics of current buffer in location list.
	nmap <silent> [g <Plug>(coc-diagnostic-prev)
	nmap <silent> ]g <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 K to show documentation in preview window.
	nnoremap <silent> K :call <SID>show_documentation()<CR>
	
	function! s:show_documentation()
	  if (index(['vim','help'], &filetype) >= 0)
	    execute 'h '.expand('<cword>')
	  else
	    call CocAction('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
	
	" Applying codeAction to the selected region.
	" Example: `<leader>aap` for current paragraph
	xmap <leader>a  <Plug>(coc-codeaction-selected)
	nmap <leader>a  <Plug>(coc-codeaction-selected)
	
	" 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>
" }}}