-- return a function for lazy.nvim
return function()
	local cmp = require("cmp")
	local luasnip = require("luasnip")
	local lspkind = require("lspkind")

	-- load friendly-snippets
	require("luasnip.loaders.from_vscode").lazy_load()

	cmp.setup({
		snippet = {
			expand = function(args)
				luasnip.lsp_expand(args.body)
			end,
		},
		mapping = cmp.mapping.preset.insert({
			["<C-b>"] = cmp.mapping.scroll_docs(-4),
			["<C-f>"] = cmp.mapping.scroll_docs(4),
			["<C-Space>"] = cmp.mapping.complete(),  -- manual trigger
			["<CR>"] = cmp.mapping.confirm({ select = true }),
			["<Tab>"] = cmp.mapping(function(fallback)
				if cmp.visible() then
					cmp.select_next_item()
				elseif luasnip.expand_or_jumpable() then
					luasnip.expand_or_jump()
				else
					fallback()
				end
			end, { "i", "s" }),
			["<S-Tab>"] = cmp.mapping(function(fallback)
				if cmp.visible() then
					cmp.select_prev_item()
				elseif luasnip.jumpable(-1) then
					luasnip.jump(-1)
				else
					fallback()
				end
			end, { "i", "s" }),
		}),
		sources = cmp.config.sources({
			{ name = "nvim_lsp" },
			{ name = "path" },
			{ name = "luasnip" },
		}, {
			{ name = "buffer" },
		}),
		formatting = {
			format = lspkind.cmp_format({ with_text = true, maxwidth = 50 }),
		},
		window = {
			completion = cmp.config.window.bordered({
				border = "rounded",
				winhighlight = "Normal:NormalFloat,FloatBorder:FloatBorder,CursorLine:PmenuSel,Search:None",
			}),
			documentation = cmp.config.window.bordered({
				border = "rounded",
				winhighlight = "Normal:NormalFloat,FloatBorder:FloatBorder,CursorLine:PmenuSel,Search:None",
			}),
		},
		completion = {
			autocomplete = false,  -- only trigger with <C-Space>
		},
	})
end