-- Auto-completion / Snippets
return {
	-- https://github.com/hrsh7th/nvim-cmp
	"hrsh7th/nvim-cmp",
	event = "InsertEnter",
	dependencies = {
		-- Snippet engine & associated nvim-cmp source
		-- https://github.com/L3MON4D3/LuaSnip
		"L3MON4D3/LuaSnip",
		-- https://github.com/saadparwaiz1/cmp_luasnip
		"saadparwaiz1/cmp_luasnip",

		-- LSP completion capabilities
		-- https://github.com/hrsh7th/cmp-nvim-lsp
		"hrsh7th/cmp-nvim-lsp",

		-- Additional user-friendly snippets
		-- https://github.com/rafamadriz/friendly-snippets
		"rafamadriz/friendly-snippets",
		-- https://github.com/hrsh7th/cmp-buffer
		"hrsh7th/cmp-buffer",
		-- https://github.com/hrsh7th/cmp-path
		"hrsh7th/cmp-path",
		-- https://github.com/hrsh7th/cmp-cmdline
		"hrsh7th/cmp-cmdline",
		-- sql completion
		"kristijanhusak/vim-dadbod-completion",
		{"onsails/lspkind.nvim", lazy = true},
	},
	config = function()
		local cmp = require("cmp")
		local luasnip = require("luasnip")
		local lspkind = require('lspkind')
		require("luasnip.loaders.from_vscode").lazy_load()
		luasnip.config.setup({})

		cmp.setup({
			snippet = {
				expand = function(args)
					luasnip.lsp_expand(args.body)
				end,
			},
			completion = {
				completeopt = "menu,menuone,noinsert",
			},
			mapping = cmp.mapping.preset.insert({
				["<C-j>"] = cmp.mapping.select_next_item(), -- next suggestion
				["<C-k>"] = cmp.mapping.select_prev_item(), -- previous suggestion
				["<C-b>"] = cmp.mapping.scroll_docs(-4), -- scroll backward
				["<C-f>"] = cmp.mapping.scroll_docs(4), -- scroll forward
				["<C-Space>"] = cmp.mapping.complete({}), -- show completion suggestions
				["<A-CR>"] = cmp.mapping.confirm({
					behavior = cmp.ConfirmBehavior.Replace,
					select = true,
				}),
				-- Tab through suggestions or when a snippet is active, tab to the next argument
				["<Tab>"] = cmp.mapping(function(fallback)
					if cmp.visible() then
						-- cmp.select_next_item()
						cmp.confirm({
							behavior = cmp.ConfirmBehavior.Replace,
							select = true,
						})
					elseif luasnip.expand_or_locally_jumpable() then
						luasnip.expand_or_jump()
					else
						fallback()
					end
				end, { "i", "s" }),
				-- Tab backwards through suggestions or when a snippet is active, tab to the next argument
				["<S-Tab>"] = cmp.mapping(function(fallback)
					if cmp.visible() then
						cmp.select_prev_item()
					elseif luasnip.locally_jumpable(-1) then
						luasnip.jump(-1)
					else
						fallback()
					end
				end, { "i", "s" }),
			}),
			sources = cmp.config.sources({
				{ name = "vim-dadbod-completion" }, -- sql
				{ name = "nvim_lsp" }, -- lsp
				{ name = "luasnip" }, -- snippets
				{ name = "buffer" }, -- text within current buffer
				{ name = "path" }, -- file system paths
			}),
			window = {
				completion = {
					width = 23,
					max_height = 13,
					border = "rounded",
					winhighlight = "Normal:CmpPmenu,CursorLine:PmenuSel,Search:None",
					-- winhighlight = "Normal:CmpPmenu,FloatBorder:CmpPmenuBorder,CursorLine:PmenuSel,Search:None",
				},
				documentation = {
					max_width = 72,
					max_height = 23,
					border = "rounded",
					winhighlight = "Normal:CmpDoc",
				},
			},
			formatting = {
				fields = { "kind", "abbr", "menu" },
				format = function(entry, vim_item)
					local kind = require("lspkind").cmp_format({ 
						mode = "symbol_text", 
						maxwidth = 42,
						ellipsis_char = "··",
						-- show_labelDetails = true,
						menu = ({
							buffer = "Bfr",
							nvim_lsp = "LSP",
							luasnip = "Snp",
							nvim_lua = "Lua",
							latex_symbols = "Ltx",
						})
					})(entry, vim_item)
					local strings = vim.split(kind.kind, "%s", { trimempty = true })
					local men = kind.menu
					kind.kind = (strings[1] or "") .. " "
					kind.menu = (men or "") .. " | " .. (strings[2] or "")

					return kind
				end,
			},
			-- formatting = {
			-- 	format = lspkind.cmp_format({
			-- 		mode = "symbol_text", -- text_symbol or symbol_text
			-- 		maxwidth = 23,
			-- 		ellipsis_char = '..',
			-- 		show_labelDetails = true,
			-- 		menu = ({
			-- 			buffer = "[Buffer]",
			-- 			nvim_lsp = "[LSP]",
			-- 			luasnip = "[LuaSnip]",
			-- 			nvim_lua = "[Lua]",
			-- 			latex_symbols = "[Latex]",
			-- 		})
			-- 	}),
			-- },
			view = {
				entries = {name = 'custom', selection_order = 'near_cursor' }
			},
		})
	end,
}