local cmp = require("cmp")
local luasnip = require("luasnip")
local lspkind = require("lspkind")
require("luasnip/loaders/from_vscode").lazy_load()

cmp.setup({
	completion = {
		completeopt = "menu,menuone,preview,noselect",
	},
	window = { -- making ui stuff for completion bordered
		completion = cmp.config.window.bordered(),
		documentation = cmp.config.window.bordered(),
	},
	-- configure lspkind for vs-code like pictograms in completion menu
	formatting = {
		format = lspkind.cmp_format({
			maxwidth = 50,
			ellipsis_char = "...",
		}),
	},
	snippet = { -- configure how nvim-cmp interacts with snippet engine
		expand = function(args)
			luasnip.lsp_expand(args.body)
		end,
	},
	mapping = {
		["<C-k>"] = cmp.mapping.select_prev_item(), -- previous suggestion
		["<C-j>"] = cmp.mapping.select_next_item(), -- next suggestion
		["<C-b>"] = cmp.mapping.scroll_docs(-4),
		["<C-f>"] = cmp.mapping.scroll_docs(4),
		["<C-Space>"] = cmp.mapping.complete(), -- show completion suggestions
		["<C-y>"] = cmp.config.disable,
		["<C-c>"] = cmp.mapping({ -- close completion window
			i = cmp.mapping.abort(),
			c = cmp.mapping.close(),
		}),
		["<CR>"] = cmp.mapping.confirm({
			behavior = cmp.ConfirmBehavior.Replace,
			select = false,
		}),
		["<Tab>"] = cmp.mapping(function(fallback)
			if cmp.visible() then
				cmp.select_next_item()
			elseif luasnip.expandable() then
				luasnip.expand()
			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" }),
	},
	cmp.setup.cmdline(":", {
		mapping = cmp.mapping.preset.cmdline(),
		sources = {
			{ name = "cmdline" },
		},
	}),
	-- cmp.setup.cmdline("/", {
	-- 	mapping = cmp.mapping.preset.cmdline(),
	-- 	sources = {
	-- 		{ name = "buffer" },
	-- 	},
	-- }),
	-- sources for autocompletion
	sources = {
		{ name = "nvim_lsp" },
		{ name = "nvim_lsp_signature_help" }, -- parameter hints
		{ name = "luasnip" }, -- snippets
		{ name = "buffer" }, -- text within current buffer
		{ name = "path" }, -- file system paths
		{ name = "codeium" }, -- AI for autocompletion
		-- { name = "calc" }, --for maths calculations
	},
})