vim.api.nvim_create_autocmd("LspAttach", {
  callback = function(ev)
    local client = vim.lsp.get_client_by_id(ev.data.client_id)
    local function toSnakeCase(str)
      return string.gsub(str, "%s*[- ]%s*", "_")
    end

    if client.name == "omnisharp" then
      local tokenModifiers = client.server_capabilities.semanticTokensProvider.legend.tokenModifiers
      for i, v in ipairs(tokenModifiers) do
        tokenModifiers[i] = toSnakeCase(v)
      end
      local tokenTypes = client.server_capabilities.semanticTokensProvider.legend.tokenTypes
      for i, v in ipairs(tokenTypes) do
        tokenTypes[i] = toSnakeCase(v)
      end
    end
  end,
})

local modifiedBufs = function(bufs)
  local t = 0
  for _, v in pairs(bufs) do
    if v.name:match("NvimTree_") == nil then
      t = t + 1
    end
  end
  return t
end

vim.api.nvim_create_autocmd("BufEnter", {
  nested = true,
  callback = function()
    if
      #vim.api.nvim_list_wins() == 1
      and vim.api.nvim_buf_get_name(0):match("NvimTree_") ~= nil
      and modifiedBufs(vim.fn.getbufinfo({ bufmodified = 1 })) == 0
    then
      vim.cmd("quit")
    end
  end,
})

local function open_nvim_tree(data)
  -- buffer is a directory
  local directory = vim.fn.isdirectory(data.file) == 1

  if not directory then
    return
  end

  -- change to the directory
  if directory then
    vim.cmd.cd(data.file)
  end

  -- open the tree
  require("nvim-tree.api").tree.open()
end

vim.api.nvim_create_autocmd({ "VimEnter" }, { callback = open_nvim_tree })