/*
   Copyright 2014 CoreOS, Inc.

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/

package initialize

import (
	"errors"
	"log"

	"github.com/coreos/coreos-cloudinit/config"
)

func ParseUserData(contents string) (interface{}, error) {
	if len(contents) == 0 {
		return nil, nil
	}

	switch {
	case config.IsScript(contents):
		log.Printf("Parsing user-data as script")
		return config.NewScript(contents)
	case config.IsCloudConfig(contents):
		log.Printf("Parsing user-data as cloud-config")
		return config.NewCloudConfig(contents)
	default:
		return nil, errors.New("Unrecognized user-data format")
	}
}