-- Reference: https://github.com/hrsh7th/nvim-cmp#recommended-configuration
return function()
	local cmp = require "cmp"

	cmp.setup {
		snippet = {
			expand = function(args)
				vim.snippet.expand(args.body)
			end,
		},
		window = {
			completion = cmp.config.window.bordered(),
			documentation = cmp.config.window.bordered(),
		},
		mapping = cmp.mapping.preset.insert {
			['<C-b>']  = cmp.mapping.scroll_docs(-4),
			['<C-f>']  = cmp.mapping.scroll_docs(4),
			['<C-CR>'] = cmp.mapping.complete(),
			['<C-e>']  = cmp.mapping.abort(),
			['<CR>']   = cmp.mapping.confirm({ select = true }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
		},
		sources = cmp.config.sources({ { name = 'nvim_lsp' } }, { { name = 'buffer' } })
	}

	-- Use buffer source for `/` and `?` (if you enabled `native_menu`, this won't work anymore).
	cmp.setup.cmdline({ '/', '?' }, {
		mapping = cmp.mapping.preset.cmdline(),
		sources = {
			{ name = 'buffer' }
		}
	})

	-- Use cmdline & path source for ':' (if you enabled `native_menu`, this won't work anymore).
	cmp.setup.cmdline(':', {
		mapping = cmp.mapping.preset.cmdline(),
		sources = cmp.config.sources({
			{ name = 'path' }
		}, {
			{ name = 'cmdline' }
		})
	})
end