local M = {}

function M.config()
	local cmp_status_ok, cmp = pcall(require, "cmp")
	if not cmp_status_ok then
		return
	end

	local snip_status_ok, luasnip = pcall(require, "luasnip")
	if not snip_status_ok then
		return
	end

	local check_backspace = function()
		local col = vim.fn.col "." - 1
		return col == 0 or vim.fn.getline("."):sub(col, col):match "%s"
	end

	local kind_icons = {
		Text = "",
		Method = "",
		Function = "",
		Constructor = "",
		Field = "ﰠ",
		Variable = "",
		Class = "",
		Interface = "",
		Module = "",
		Property = "",
		Unit = "",
		Value = "",
		Enum = "",
		Keyword = "",
		Snippet = "",
		Color = "",
		File = "",
		Reference = "",
		Folder = "",
		EnumMember = "",
		Constant = "",
		Struct = "פּ",
		Event = "",
		Operator = "",
		TypeParameter = "",
	}

	cmp.setup {
		formatting = {
			fields = { "kind", "abbr", "menu" },
			format = function(_, vim_item)
				vim_item.kind = string.format("%s", kind_icons[vim_item.kind])
				return vim_item
			end,
		},
		snippet = {
			expand = function(args)
				luasnip.lsp_expand(args.body)
			end,
		},
		duplicates = {
			nvim_lsp = 1,
			luasnip = 1,
			cmp_tabnine = 1,
			buffer = 1,
			path = 1,
		},
		confirm_opts = {
			behavior = cmp.ConfirmBehavior.Replace,
			select = false,
		},
        window = {
            documentation = cmp.config.window.bordered(),
        },
		-- documentation = {
		-- 	border = { "╭", "─", "╮", "│", "╯", "─", "╰", "│" },
		-- },
		experimental = {
			ghost_text = false,
			native_menu = false,
		},
		completion = {
			keyword_length = 1,
		},
		sources = {
			{ name = "nvim_lsp" },
			--{ name = "luasnip" },
			{ name = "buffer" },
			{ name = "path" },
		},
		mapping = {
			["<C-k>"] = cmp.mapping.select_prev_item(),
			["<C-j>"] = cmp.mapping.select_next_item(),
			["<C-d>"] = cmp.mapping(cmp.mapping.scroll_docs(-1), { "i", "c" }),
			["<C-f>"] = cmp.mapping(cmp.mapping.scroll_docs(1), { "i", "c" }),
			["<C-Space>"] = cmp.mapping(cmp.mapping.complete(), { "i", "c" }),
			["<C-y>"] = cmp.config.disable,
			["<C-e>"] = cmp.mapping {
				i = cmp.mapping.abort(),
				c = cmp.mapping.close(),
			},
			["<CR>"] = cmp.mapping.confirm { 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()
				elseif check_backspace() then
					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",
			}),
		},
	}
end

return M