###
Options include
*   ssh
*   mode
*   content
*   kerberos [boolean]

A server configuration is expected to define a keytab. Add the principal
name if the keytab store multiple tickets. A client configuration for an
application will be similar and also defines a keytab. A client configuration
for a login user will usually get the ticket from the user ticket cache created
with a `kinit` command.

Example:

```
file.jaas
  server:
    keyTab: '/path/to/keytab'
    principal: 'service/host@REALM'
  client:
    useTicketCache: 'true'
, (err, modified) ->
  console.log err
```

###

module.exports = ({options}) ->
  # Quick fix
  # waiting for context registration of nikita actions as well as
  # waiting for uid_gid moved from wrap to their expected location
  options.mode ?= 0o600
  options.backup ?= true
  content_jaas = ""
  throw Error "Required option 'content'" unless options.content
  for type, properties of options.content
    # type = "#{type.charAt(0).toUpperCase()}#{type.slice 1}"
    content_jaas += "#{type} {\n"
    # Validation and Normalization
    throw Error 'Invalid keytab option' if properties.keyTab and typeof properties.keyTab isnt 'string'
    properties.useTicketCache = 'true' if properties.useTicketCache
    if properties.keyTab
      properties.useKeyTab ?= 'true'
      properties.storeKey ?= 'true'
      properties.useTicketCache ?= 'false'
    else
      properties.useKeyTab ?= 'false'
      properties.useTicketCache ?= 'true'
    if typeof value isnt 'string'
      if typeof value is 'number'
        value = "#{value}"
      else
        value = if value then 'true' else 'false'
    # Detect JAAS/Kerberos
    if properties.keyTab or properties.useTicketCache is 'true'
      content_jaas += '  com.sun.security.auth.module.Krb5LoginModule required\n'
      for property, value of properties
        value = "\"#{value}\"" unless value in [true, false, 'true', 'false']
        content_jaas += "  #{property}=#{value}\n"
      content_jaas = content_jaas.slice(0, -1) + ';\n'
    content_jaas += '};\n'
  options.content = content_jaas
  @file options