local none_ls = require("null-ls")

local augroup = vim.api.nvim_create_augroup("LspFormatting", {})

local opts = {
  sources = {
    -- gomft
    none_ls.builtins.formatting.gofmt,
    -- goimports-reviser (https://github.com/incu6us/goimports-reviser)
    none_ls.builtins.formatting.goimports_reviser,
    -- golangci-lint
    none_ls.builtins.diagnostics.golangci_lint,
  },
  on_attach = function(client, bufnr)
    -- check if there's any commands pre-running on the current buffer,
    -- clear those and then run out own format command
    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,
}

return opts