"""""""""""MISC"""""""""""

"clear all existing autocmds
autocmd!

"makes sure all the features all available
set nocompatible

"required for vim-plug and :! to work
set shell=cmd.exe
set noshellslash
set shellquote="\""

"make the global variable if it doesn't exist
if !exists('g:BG')
    let g:BG=&background
endif

"make vim store g:CAPS variables to ~/_viminfo
set viminfo+=!


"""""""""PLUGINS""""""""""

call plug#begin('~/vimfiles/plugged')
Plug 'altercation/vim-colors-solarized'
Plug 'tpope/vim-surround'
Plug 'ervandew/supertab'
Plug 'exvim/ex-aftercolors'
Plug 'scrooloose/nerdtree'
Plug 'tpope/vim-commentary'
call plug#end()


"""""""""GENERAL""""""""""

"font and theming
set guifont=Consolas:h12
colorscheme solarized
let g:solarized_italic=0
syntax enable
set guioptions-=m
set guioptions-=T
set guioptions-=L
set guioptions-=l
set guioptions-=R
set guioptions-=r
set guioptions-=b
set guioptions-=h
set guioptions-=e
set guicursor+=n-v-c:blinkon0  "stop cursor blinking

"line wrapping
set wrap
set linebreak
set nolist  " list disables linebreak
set textwidth=0
set wrapmargin=0
set formatoptions-=t

"visuals
set cursorline
set number
set relativenumber
set ruler
set showcmd

"indentation settings
set tabstop=4
set softtabstop=4
set expandtab
set autoindent
set smartindent

"search is case sensitive if it has a upper case letter
set ignorecase
set smartcase

"no errorbells
set noerrorbells visualbell t_vb=
autocmd GUIEnter * set visualbell t_vb=

"language settings
set langmenu=en_US
let $LANG = 'en_US'
set encoding=utf-8
set fileformats=unix,dos

"highlight matches when searching
set incsearch
set hlsearch

"use system clipboard
set clipboard=unnamed

"update changes to file automatically
set autoread

"make backspace behave normally
set backspace=indent,eol,start


"""""""""MAPPINGS""""""""""

"sets space as the leader key
let mapleader=" "

"makes these keys easier to use
noremap , :
noremap : ;
noremap ; ,

"split navigations
nnoremap <C-J> <C-W><C-J>
nnoremap <C-K> <C-W><C-K>
nnoremap <C-L> <C-W><C-L>
nnoremap <C-H> <C-W><C-H>

"make Y behave the same way as D and C
nnoremap Y y$

"new line with enter/shift-enter in normal mode
nnoremap <S-Enter> O<Esc>j
nnoremap <CR> o<Esc>k

"don't show match highlights
nnoremap <Leader>n :noh<cr>

"make split equal
nnoremap <Leader>eq <C-w>=

"exceute current python file
nnoremap <Leader>py :w<CR>:!python %<CR>

"open vimrc in a tab
nnoremap <Leader>vr :tabe $MYVIMRC<CR>

"source vimrc
nnoremap <Leader>so :so $MYVIMRC<CR>

"show NERDTree
nnoremap <Leader>t :NERDTree

"vim-plug commands
nnoremap <Leader>pi :PlugInstall<CR>
nnoremap <Leader>pc :PlugClean<CR>
nnoremap <Leader>pu :PlugUpdate<CR>

"toggle theme background
nnoremap <F12> :call ToggleBG()<CR>


"""""""""FUNCTIONS""""""""""

"funtion to toggle between solarized dark/light
function! ToggleBG()
    if &background == "dark"
        set background=light
        let g:BG="light"
    else
        set background=dark
        let g:BG="dark"
    endif
    colorscheme solarized
endfunction


"""""""""AUTOCMD""""""""""

"toggle relative numbers between modes
augroup LineNumbers
    autocmd!
    autocmd InsertEnter * :set norelativenumber
    autocmd InsertLeave * :set relativenumber
augroup END

"source vimrc when it's saved
augroup Source
    autocmd!
    autocmd! BufWritePost _vimrc source %
augroup END