READ_REPO = {
  'scope': 'repo:read',
  'icon': 'fa-hdd-o',
  'title': 'View all visible repositories',
  'description': ('This application will be able to view and pull all repositories visible to the '
                  'granting user or robot account')
}

WRITE_REPO = {
  'scope': 'repo:write',
  'icon': 'fa-hdd-o',
  'title': 'Read/Write to any accessible repositories',
  'description': ('This application will be able to view, push and pull to all repositories to '
                  'which the granting user or robot account has write access')
}

ADMIN_REPO = {
  'scope': 'repo:admin',
  'icon': 'fa-hdd-o',
  'title': 'Administer Repositories',
  'description': ('This application will have administrator access to all repositories to which '
                  'the granting user or robot account has access')  
}

CREATE_REPO = {
  'scope': 'repo:create',
  'icon': 'fa-plus',
  'title': 'Create Repositories',
  'description': ('This application will be able to create repositories in to any namespaces that '
                  'the granting user or robot account is allowed to create repositories')
}

READ_USER = {
  'scope': 'user:read',
  'icon': 'fa-user',
  'title': 'Read User Information',
  'description': ('This application will be able to read user information such as username and '
                  'email address.'),
}

ALL_SCOPES = {scope['scope']:scope for scope in (READ_REPO, WRITE_REPO, ADMIN_REPO, CREATE_REPO,
                                                 READ_USER)}


def scopes_from_scope_string(scopes):
  return {ALL_SCOPES.get(scope, {}).get('scope', None) for scope in scopes.split(',')}


def validate_scope_string(scopes):
  decoded = scopes_from_scope_string(scopes)
  return None not in decoded and len(decoded) > 0


def is_subset_string(full_string, expected_string):
  """ Returns true if the scopes found in expected_string are also found
      in full_string.
  """
  full_scopes = scopes_from_scope_string(full_string)
  expected_scopes = scopes_from_scope_string(expected_string)
  return expected_scopes.issubset(full_scopes)

def get_scope_information(scopes_string):
  scopes = scopes_from_scope_string(scopes_string)
  scope_info = []
  for scope in scopes:
    if scope:
      scope_info.append({
          'title': ALL_SCOPES[scope]['title'],
          'scope': ALL_SCOPES[scope]['scope'],
          'description': ALL_SCOPES[scope]['description'],
          'icon': ALL_SCOPES[scope]['icon'],
          })

  return scope_info