local setup_cmp = function()
	local lspkind = require("lspkind")
	local luasnip = require("luasnip")
	local cmp = require("cmp")

	local has_words_before = function()
		local line, col = unpack(vim.api.nvim_win_get_cursor(0))
		return col ~= 0 and vim.api.nvim_buf_get_lines(0, line - 1, line, true)[1]:sub(col, col):match("%s") == nil
	end

	cmp.setup({
		confirm_opts = {
			behavior = cmp.ConfirmBehavior.Replace,
			select = false,
		},
		snippet = {
			expand = function(args)
				require("luasnip").lsp_expand(args.body)
			end,
		},
		window = {
			completion = cmp.config.window.bordered(),
			documentation = cmp.config.window.bordered(),
		},
		formatting = {
			format = lspkind.cmp_format({
				mode = "symbol_text",
				maxwidth = 50,
				before = function(_, vim_item)
					return vim_item
				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(),
			["<C-e>"] = cmp.mapping.abort(),
			["<CR>"] = cmp.mapping.confirm({
				select = false,
			}),

			["<Tab>"] = cmp.mapping(function(fallback)
				if cmp.visible() then
					cmp.select_next_item()
				elseif luasnip.expand_or_jumpable() then
					luasnip.expand_or_jump()
				elseif has_words_before() then
					-- cmp.complete()
					fallback()
				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 = "copilot" },
			{ name = "nvim_lsp" },
			{ name = "luasnip" },
			{ name = "nvim_lsp_signature_help" },
			{ name = "nvim_lua" },
			{ name = "orgmode" },
			{ name = "path" },
			{ name = "buffer" },
		}),
	})

	-- Set configuration for specific filetype.
	cmp.setup.filetype("gitcommit", {
		sources = cmp.config.sources({
			{ name = "cmp_git" },
		}, {
			{ name = "buffer" },
		}),
	})

	-- Use buffer source for `/` (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

return {
	{
		"windwp/nvim-autopairs",
		event = "InsertEnter",
		config = true,
	},
	"onsails/lspkind-nvim", -- Pretty icons
	"hrsh7th/cmp-nvim-lsp",
	"hrsh7th/cmp-buffer",
	"hrsh7th/cmp-path",
	"hrsh7th/cmp-cmdline",
	"hrsh7th/cmp-omni",
	"hrsh7th/cmp-nvim-lsp-signature-help",
	{ "petertriho/cmp-git", config = true },
	{
		"zbirenbaum/copilot.lua",
		cmd = "Copilot",
		build = ":Copilot auth",
		opts = {
			suggestion = { enabled = false },
			panel = { enabled = false },
			filetypes = {
				markdown = true,
				help = true,
			},
		},
	},
	{
		"zbirenbaum/copilot-cmp",
		dependencies = { "zbirenbaum/copilot.lua" },
		config = true,
	},
	{
		"hrsh7th/nvim-cmp",
		init = function()
			vim.o.completeopt = "menu,menuone,noselect"
		end,
		config = setup_cmp,
	},
	{
		"L3MON4D3/LuaSnip",
		version = "2.*",
		build = "make install_jsregexp",
		dependencies = { "rafamadriz/friendly-snippets" },
	},
	"saadparwaiz1/cmp_luasnip",
}