local cmd = vim.cmd
local opt = vim.opt
local has = vim.fn.has

cmd('filetype plugin indent on')
cmd('syntax enable')

-- system
opt.encoding = 'utf-8'
opt.fileencoding = 'utf-8'
opt.fileencodings = {'utf-8'}
opt.backup = false -- no .bak
opt.swapfile = false -- no .swap
opt.undofile = true -- use undo file
opt.updatetime = 300 -- time (in ms) to write to swap file
-- buffer
opt.expandtab = true
opt.tabstop = 2
opt.softtabstop = 2
opt.autoindent = true
opt.shiftwidth = 2
-- window
opt.number = true
-- editing
vim.g.mapleader = ' ' --space
vim.g.maplocalleader = ' '
opt.whichwrap = 'b,s,<,>,[,]'
opt.backspace = {'indent', 'eol', 'start'}
opt.list = true
opt.ignorecase = false
opt.hlsearch = true
opt.incsearch = false
opt.inccommand = 'nosplit'
opt.completeopt = {'menuone', 'noselect'}
opt.hidden = true
opt.cursorline = true
opt.ruler = true
opt.colorcolumn = {120}
opt.signcolumn = 'yes'
opt.mouse = 'nv'
cmd('set mousehide')
opt.showmatch = true
opt.cmdheight = 2
opt.wildmenu = true
opt.wildmode = {'longest', 'full'}
opt.splitright = true
opt.splitbelow = true
opt.shortmess:append('c')

if not has('gui_running') then
  opt.t_Co = 256
end

opt.background = 'dark'
if has('termguicolors') then
  cmd('let &t_8f = "\\<Esc>[38;2;%lu;%lu;%lum"')
  cmd('let &t_8b = "\\<Esc>[48;2;%lu;%lu;%lum"')
  opt.termguicolors = true
end