-- Completions engine plugin  for neovim
return {
	"hrsh7th/nvim-cmp",
	config = function()
		local cmp = require("cmp")
		local luasnip = require("luasnip")
		local lspkind = require("lspkind")

		require("luasnip/loaders/from_vscode").lazy_load()

		vim.opt.completeopt = "menu,menuone,noselect"
		vim.cmd("highlight Pmenu guibg=NONE")

		cmp.setup({
			snippet = {
				expand = function(args)
					luasnip.lsp_expand(args.body)
				end,
			},
			mapping = cmp.mapping.preset.insert({
				["<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-e>"] = cmp.mapping.abort(), -- close completion window
				["<CR>"] = cmp.mapping.confirm({ select = false }),
			}),
			-- sources for autocompletion
			sources = cmp.config.sources({
				{ name = "nvim_lsp" }, -- lsp
				{ name = "luasnip" }, -- snippets
				{ name = "buffer" }, -- text within current buffer
				{ name = "path" }, -- file system paths
				{ name = "cmdline" }, -- command line
				{ name = "nvim_lua" }, -- nvim-cmp for nvim lua API
			}),
			-- configure lspkind for vs-code like icons
			formatting = {
				format = lspkind.cmp_format({
					maxwidth = 50,
					ellipsis_char = "...",
				}),
			},
			window = {
				completion = {
					border = "double",
					winhighlight = "Normal:Pmenu,FloatBorder:Pmenu,Search:None",
				},
				documentation = {
					border = "double",
					winhighlight = "Normal:Pmenu,FloatBorder:Pmenu,Search:None",
				},
			},
		})
	end,
	dependencies = {
		"onsails/lspkind.nvim",
		{
			"L3MON4D3/LuaSnip",
			dependencies = { "rafamadriz/friendly-snippets" },
			-- follow latest release.
			version = "2.*", -- Replace <CurrentMajor> by the latest released major (first number of latest release)
			-- install jsregexp (optional!).
			build = "make install_jsregexp",
		},
	},
}
