" Disable unused components
set nobackup
set nocompatible

" Setup paths
set viminfo+=n~/.cache/vim_history

"" General

filetype plugin on
syntax on

" Behavior
set clipboard=unnamedplus
set encoding=utf-8
set fileencoding=utf-8
set hidden

set history=1000
set undolevels=1000

set suffixes=.bak,~,.swp,.o,.info,.aux,.log,.dvi,.bbl,.blg,.brf,.cb,.ind,.idx,.ilg,.inx,.out,.toc,.png,.jpg
set wildignore=*.bak,*.swp,*.o,*.info,*.aux,*.log,*.dvi,*.bbl,*.blg,*.brf,*.cb,*.ind,*.idx,*.ilg,*.inx,*.out,*.toc,*.png,*.jpg

" Editing
set number
set ruler

set background=dark
colorscheme hybrid_reverse

set cursorline
autocmd! ColorScheme * highlight clear CursorLine

" Indentation
set autoindent
filetype indent on

set backspace=indent,eol,start
set noexpandtab
set shiftround
set tabstop=4
set softtabstop=4
set shiftwidth=4

" UI
set laststatus=2
set noshowmode
set nowrap

"" Plugin configuration

" lightline.vim
let g:lightline = {}
let g:lightline.colorscheme  = 'Tomorrow_Night_Bright'
let g:lightline.separator    =  {'left': "\ue0b0", 'right': "\ue0b2"}
let g:lightline.subseparator =  {'left': "\ue0b1", 'right': "\ue0b3"}

" lightline-bufferline
let g:lightline.tabline          = {'left': [['buffers']], 'right': [['text']]}
let g:lightline.component_expand = {'buffers': 'lightline#bufferline#buffers'}
let g:lightline.component_type   = {'buffers': 'tabsel'}
let g:lightline.component        = {'text': 'buffers'}

let g:lightline#bufferline#min_buffer_count = 2

" NERD Commenter
let g:NERDCommentEmptyLines=1
let g:NERDSpaceDelims=1
let g:NERDTrimTrailingWhitespace=1

" NERD Tree
let g:NERDTreeMinimalUI=1
let g:NERDTreeAutoDeleteBuffer=1

" vimtex
let g:tex_flavor = 'latex'
let g:vimtex_view_method = 'zathura'

"" Autocommands

" Remove trailing whitespace in the following filetypes
autocmd FileType c,cpp,ino,java,py,php,sh,tex autocmd BufWritePre <buffer> %s/\s\+$//e

" Close vim if only window is NERD Tree
autocmd bufenter * if (winnr("$") == 1 && exists("b:NERDTree") && b:NERDTree.isTabTree()) | q | endif

"" Functions

function! CloseTab()
	let bufNr = bufnr('%')
	let nerdTreeStatus = exists('t:NERDTreeBufName') && bufwinnr(t:NERDTreeBufName) != -1
	let currentFile = expand('%:t')

	if nerdTreeStatus
		execute "NERDTreeClose"
		if currentFile !~# "NERD_tree"
			execute "bw "bufNr
			execute "NERDTreeToggle"
		endif
	else
		execute "bw "bufNr
	endif
endfunction

"" Keybindings

" Tab/Shift+Tab functionality
nnoremap <Tab> >>_
nnoremap <S-Tab> <<_
inoremap <S-Tab> <C-D>
vnoremap <Tab> >gv
vnoremap <S-Tab> <gv

" Buffer switching
nnoremap <silent> <C-h> :bprevious<CR>
nnoremap <silent> <C-l> :bnext<CR>
nnoremap <silent> <C-w> :call CloseTab()<CR>
nmap <Leader>1 <Plug>lightline#bufferline#go(1)

" Toggle NERD Tree
nnoremap <silent> <C-t> :NERDTreeToggle<CR>