local M = {}

function M.config()
	local status_ok, null_ls = pcall(require, "null-ls")
	if not status_ok then
		return
	end

    local augroup = vim.api.nvim_create_augroup("LspFormatting", {})
	null_ls.setup {
		debug = false,
		sources = {
            -- https://github.com/jose-elias-alvarez/null-ls.nvim/blob/main/doc/BUILTINS.md

            -- Python

            -- pip install black
			null_ls.builtins.formatting.black,

            -- pip install isort
			null_ls.builtins.formatting.isort,


            -- JavaScript / TypeScript

            -- sudo pacman -S prettierd
            -- sudo npm install -g @fsouza/prettierd
			null_ls.builtins.formatting.prettierd.with({
                disabled_filetypes = { "html" },
                condition = function(utils)
                    return utils.root_has_file({ ".prettierrc.js" })
                end,
            }),

            -- sudo pacman -S eslint_d
            -- sudo npm install -g eslint_d
			null_ls.builtins.diagnostics.eslint_d.with({
                diagnostic_config = {
                    virtual_text = false,
                    severity_sort = true,
                },
                condition = function(utils)
                    return utils.root_has_file({ ".eslintrc.js" })
                end,
            }),
		},
		-- Format before save
        on_attach = function(client, bufnr)
            if client.supports_method("textDocument/formatting") then
                vim.api.nvim_clear_autocmds({ group = augroup, buffer = bufnr })
                vim.api.nvim_create_autocmd("BufWritePre", {
                    group = augroup,
                    buffer = bufnr,
                    callback = function()
                        vim.lsp.buf.format({ bufnr = bufnr })
                    end,
                })
            end
        end,
	}
end

return M