-- Some servers have issues with backup files, see #649.
vim.opt.backup = false
vim.opt.writebackup = false

-- Having longer updatetime (default is 4000 ms = 4 s) leads to noticeable
-- delays and poor user experience.
vim.opt.updatetime = 300

-- Always show the signcolumn, otherwise it would shift the text each time
-- diagnostics appear/become resolved.
vim.opt.signcolumn = "yes"


-- Auto complete
function _G.check_back_space()
    local col = vim.fn.col('.') - 1
    return col == 0 or vim.fn.getline('.'):sub(col, col):match('%s')
end

local opts = { silent = true, noremap = true, expr = true }

-- Use tab for trigger completion with characters ahead and navigate.
-- NOTE: There's always complete item selected by default, you may want to enable
-- no select by `"suggest.noselect": true` in your configuration file.
-- NOTE: Use command ':verbose imap <tab>' to make sure tab is not mapped by
-- other plugin before putting this into your config.
-- vim.api.nvim_set_keymap("i", "<TAB>",
--                        'coc#pum#visible() ? coc#pum#next(1) : v:lua.check_back_space() ? "<TAB>" : coc#refresh()', opts)
-- vim.api.nvim_set_keymap("i", "<S-TAB>",
--                         [[coc#pum#visible() ? coc#pum#prev(1) : "\<C-h>"]], opts)

-- Make <CR> to accept selected completion item or notify coc.nvim to format
-- <C-g>u breaks current undo, please make your own choice.
vim.api.nvim_set_keymap("i", "<cr>",
    [[coc#pum#visible() ? coc#pum#confirm() : "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"]], opts)