vim.cmd('let g:netrw_liststyle = 3')

local opt = vim.opt

-- environment
opt.showmode = false

-- :cd shows cwd
opt.cdhome = false

-- line numbers
opt.number = true
opt.relativenumber = true

-- tabs & indents
opt.tabstop = 3
opt.softtabstop = 3
opt.shiftwidth = 3
opt.expandtab = true
opt.smartindent = true
opt.autoindent = true

-- line wrapping
opt.wrap = false

-- keep cursor line centered
opt.scrolloff = 999

-- search
opt.ignorecase = true
opt.smartcase = true
opt.iskeyword:append('-') -- consider string-string as a whole word

-- cursor line
opt.cursorline = true

-- appearance
opt.termguicolors = true
opt.background = 'dark'
opt.signcolumn = 'yes'
opt.colorcolumn = '80'
vim.diagnostic.config({
  float = {
    border = 'rounded',
  },
})

-- virtualedit
opt.virtualedit = 'block'

-- backspace
opt.backspace = 'indent,eol,start'

-- clipboard
opt.clipboard:append('unnamedplus') -- use system clipboard as the default register

-- split windows
opt.splitright = true
opt.splitbelow = true

-- save me
-- opt.undodir = { os.getenv("HOME") .. "/.config/nvim/.undo/" }
opt.undofile = true

-- folding
opt.foldlevel = 20
opt.foldmethod = 'expr'
opt.foldexpr = 'nvim_treesitter#foldexpr()'

-- session management
opt.sessionoptions = 'blank,buffers,curdir,folds,help,tabpages,winsize,winpos,terminal,localoptions'