local cmp = require("cmp")
local cmp_buffer = require("cmp_buffer")

cmp.setup({
	completion = {
		completeopt = "menu,menuone,noinsert",
	},
	snippet = {
		expand = function(args)
			vim.fn["vsnip#anonymous"](args.body)
		end,
	},
	mapping = cmp.mapping.preset.insert({
		["<C-u>"] = cmp.mapping.scroll_docs(-4),
		["<C-d>"] = cmp.mapping.scroll_docs(4),
		["<C-Space>"] = cmp.mapping.complete(),
		["<C-e>"] = cmp.mapping.close(),
		["C-y"] = cmp.mapping.confirm({ select = true, behaviour = cmp.ConfirmBehavior.Replace }),
		["<CR>"] = cmp.mapping.confirm({ select = true, behaviour = cmp.ConfirmBehavior.Replace }),
	}),
	sources = cmp.config.sources({
		{ name = "copilot", keyword_length = 0 },
		{ name = "nvim_lsp", keyword_length = 3 },
		{
			name = "buffer",
			option = {
				get_bufnrs = function()
					return vim.api.nvim_list_bufs()
				end,
			},
		},
		{ name = "path" },
		{ name = "calc" },
	}),
	sorting = {
		comparators = {
			function(...)
				return cmp_buffer:compare_locality(...)
			end,
		},
	},
	view = {
		entries = "native",
	},
	experimental = {
		ghost_text = true,
	},
})