vim.o.foldcolumn = '1' -- '0' is not bad
vim.o.foldlevel = 99 -- Using ufo provider need a large value, feel free to decrease the value
vim.o.foldlevelstart = 99
vim.o.foldenable = true

-- Using ufo provider need remap `zR` and `zM`. If Neovim is 0.6.1, remap yourself
vim.keymap.set('n', 'zR', require('ufo').openAllFolds)
vim.keymap.set('n', 'zM', require('ufo').closeAllFolds)

vim.keymap.set('n', 'zK', function()
  local winid = require('ufo').peekFoldedLinesUnderCursor()
  if not winid then
    -- choose one of coc.nvim and nvim lsp
    -- vim.fn.CocActionAsync 'definitionHover' -- coc.nvim
    vim.lsp.buf.hover()
  end
end)

local capabilities = vim.lsp.protocol.make_client_capabilities()
capabilities.textDocument.foldingRange = {
  dynamicRegistration = false,
  lineFoldingOnly = true,
}

-- local language_servers = require('lspconfig').util.available_servers() -- or list servers manually like {'gopls', 'clangd'}
-- print(language_servers)
-- for _, ls in ipairs(language_servers) do
--   require('lspconfig')[ls].setup {
--     capabilities = capabilities,
--     -- you can add other fields for setting up lsp server in this table
--   }
-- end

require('ufo').setup {
  provider_selector = function(bufnr, filetype, buftype)
    return { 'lsp', 'indent' }
  end,
}