local mytabstop = {}

local tabstop_settings = {
  c = { tabstop = 4, shiftwidth = 4, expandtab = true },
  h = { tabstop = 4, shiftwidth = 4, expandtab = true },
  cpp = { tabstop = 4, shiftwidth = 4, expandtab = true },
  hpp = { tabstop = 4, shiftwidth = 4, expandtab = true },
  cxx = { tabstop = 4, shiftwidth = 4, expandtab = true },
  hxx = { tabstop = 4, shiftwidth = 4, expandtab = true },
  ixx = { tabstop = 4, shiftwidth = 4, expandtab = true },
  cc = { tabstop = 4, shiftwidth = 4, expandtab = true },
  hh = { tabstop = 4, shiftwidth = 4, expandtab = true },
  cs = { tabstop = 4, shiftwidth = 4, expandtab = true },
  js = { tabstop = 2, shiftwidth = 2, expandtab = true },
  ts = { tabstop = 2, shiftwidth = 2, expandtab = true },
  html = { tabstop = 2, shiftwidth = 2, expandtab = true },
  py = { tabstop = 4, shiftwidth = 4, expandtab = true },
  rs = { tabstop = 4, shiftwidth = 4, expandtab = true },
  go = { tabstop = 4, shiftwidth = 4, expandtab = false },
  lua = { tabstop = 2, shiftwidth = 2, expandtab = true },
  vim = { tabstop = 2, shiftwidth = 2, expandtab = true },
  bash = { tabstop = 2, shiftwidth = 2, expandtab = true },
  fish = { tabstop = 2, shiftwidth = 2, expandtab = true },
  sh = { tabstop = 2, shiftwidth = 2, expandtab = true },
  rb = { tabstop = 2, shiftwidth = 2, expandtab = true },
}

local function set_tabstop()
  local ft = vim.bo.filetype
  local config = tabstop_settings[ft]

  if config then
    vim.bo.tabstop = config.tabstop
    vim.bo.shiftwidth = config.shiftwidth
    vim.bo.expandtab = config.expandtab
  else
    -- default setting
    vim.bo.tabstop = 4
    vim.bo.shiftwidth = 4
    vim.bo.expandtab = true
  end
end

function mytabstop.setup()
  vim.api.nvim_create_autocmd("FileType", { pattern = "*", callback = set_tabstop })
end

return mytabstop