/*
   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 (
	"encoding/json"
	"fmt"

	"github.com/coreos/coreos-cloudinit/pkg"
	"github.com/coreos/coreos-cloudinit/system"
)

type UserKey struct {
	ID  int    `json:"id,omitempty"`
	Key string `json:"key"`
}

func SSHImportKeysFromURL(system_user string, url string) error {
	keys, err := fetchUserKeys(url)
	if err != nil {
		return err
	}

	key_name := fmt.Sprintf("coreos-cloudinit-%s", system_user)
	return system.AuthorizeSSHKeys(system_user, key_name, keys)
}

func fetchUserKeys(url string) ([]string, error) {
	client := pkg.NewHttpClient()
	data, err := client.GetRetry(url)
	if err != nil {
		return nil, err
	}

	var userKeys []UserKey
	err = json.Unmarshal(data, &userKeys)
	if err != nil {
		return nil, err
	}
	keys := make([]string, 0)
	for _, key := range userKeys {
		keys = append(keys, key.Key)
	}
	return keys, err
}