class Gitlab::Request

def self.decode(response)
  response ? JSON.load(response) : {}
rescue JSON::ParserError
  raise Error::Parsing, 'The response is not a valid JSON'
end

def self.parse(body)
  body = decode(body)
  if body.is_a? Hash
    ObjectifiedHash.new body
  elsif body.is_a? Array
    PaginatedResponse.new(body.collect! { |e| ObjectifiedHash.new(e) })
  elsif body
    true
  elsif !body
    false
  else
    raise Error::Parsing, "Couldn't parse a response body"
  end
end

def authorization_header
  raise Error::MissingCredentials, 'Please provide a private_token or auth_token for user' unless private_token
  # The Personal Access Token prefix can be at most 20 characters, and the
  # generated part is of length 20 characters. Personal Access Tokens, thus
  # can have a maximum size of 40 characters. GitLab uses
  # `Doorkeeper::OAuth::Helpers::UniqueToken.generate` for generating
  # OAuth2 tokens, and specified `hex` as token generator method. Thus, the
  # OAuth2 tokens are of length more than 64. If the token length is below
  # that, it is probably a Personal Access Token or CI_JOB_TOKEN.
  if private_token.size >= 64
    { 'Authorization' => "Bearer #{private_token}" }
  elsif private_token.start_with?(pat_prefix.to_s)
    { 'PRIVATE-TOKEN' => private_token }
  else
    { 'JOB-TOKEN' => private_token }
  end
end

def httparty_config(options)
  options.merge!(httparty) if httparty
end

def jsonify_body_content(params)
  # Only modify the content type if there is a body to process AND multipath
  # was not explicitly requested. There are no uses of multipart in this code
  # today, but file upload methods require it and someone might be manually
  # crafting a post call with it:
  return unless params[:body] && params[:multipart] != true
  # If the caller explicitly requested a Content-Type during the call, assume
  # they know best and have formatted the body as required:
  return if params[:headers]&.key?('Content-Type')
  # If we make it here, then we assume it is safe to JSON encode the body:
  params[:headers] ||= {}
  params[:headers]['Content-Type'] = 'application/json'
  params[:body] = params[:body].to_json
end

def request_defaults(sudo = nil)
  raise Error::MissingCredentials, 'Please set an endpoint to API' unless endpoint
  self.class.default_params sudo: sudo
  self.class.default_params.delete(:sudo) if sudo.nil?
end

def validate(response)
  error_klass = Error.klass(response)
  raise error_klass, response if error_klass
  parsed = response.parsed_response
  parsed.client = self if parsed.respond_to?(:client=)
  parsed.parse_headers!(response.headers) if parsed.respond_to?(:parse_headers!)
  parsed
end