return {
    "hrsh7th/nvim-cmp",
    dependencies = {
        "hrsh7th/cmp-nvim-lsp", "hrsh7th/cmp-buffer", "hrsh7th/cmp-path",
        "hrsh7th/cmp-cmdline", "hrsh7th/cmp-nvim-lua", "hrsh7th/cmp-calc",
        "hrsh7th/cmp-nvim-lsp-signature-help"
    },
    enabled = true,
    lazy = false,
    config = function(_, _)
        local cmp = require("cmp")
        local mapping = {
            ["<Tab>"] = function(fallback)
                if cmp.visible() then
                    cmp.select_next_item(
                        { behavior = cmp.SelectBehavior.Select })
                else
                    fallback()
                end
            end,
            ["<S-Tab>"] = function(fallback)
                if cmp.visible() then
                    cmp.select_prev_item(
                        { behavior = cmp.SelectBehavior.Select })
                else
                    fallback()
                end
            end,
            ["<CR>"] = function(fallback)
                if cmp.visible() and cmp.get_active_entry() then
                    cmp.confirm({ behavior = cmp.ConfirmBehavior.Replace })
                else
                    fallback()
                end
            end
        }
        cmp.setup({
            snippet = {},
            mapping = mapping,
            sources = cmp.config.sources({ { name = "nvim_lsp" } }, {
                { name = "buffer" }, { name = "nvim_lua" }, { name = "calc" },
                { name = "nvim_lsp_signature_help" }, { name = "path" }
            })
        })
        cmp.setup.cmdline("/", {
            mapping = cmp.mapping.preset.cmdline(),
            sources = { { name = "buffer" } }
        })
        cmp.setup.cmdline(":", {
            mapping = cmp.mapping.preset.cmdline(),
            sources = cmp.config.sources({ { name = "path" } }, {
                { name = "cmdline", option = { ignore_cmds = { "Man", "!" } } }
            })
        })

        vim.api.nvim_create_autocmd("LspAttach", {
            callback = function(args)
                local client = vim.lsp.get_client_by_id(args.data.client_id)
                if client == nil then return end
                if client:supports_method('textDocument/completion') then
                    vim.lsp.completion.enable(true, client.id, args.buf,
                        { autotrigger = false })
                end
            end
        })
    end
}