/*
   Copyright (c) 2016 VMware, Inc. All Rights Reserved.
   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 service

import (
	"encoding/json"
	"strings"

	"github.com/vmware/harbor/dao"
	"github.com/vmware/harbor/models"
	svc_utils "github.com/vmware/harbor/service/utils"

	"github.com/astaxie/beego"
)

type NotificationHandler struct {
	beego.Controller
}

const MEDIA_TYPE_MANIFEST = "application/vnd.docker.distribution.manifest.v1+json"

func (n *NotificationHandler) Post() {
	var notification models.Notification
	//	log.Printf("Notification Handler triggered!\n")
	//	log.Printf("request body in string: %s", string(n.Ctx.Input.CopyBody()))
	err := json.Unmarshal(n.Ctx.Input.CopyBody(1<<32), &notification)

	if err != nil {
		beego.Error("error while decoding json: ", err)
		return
	}
	var username, action, repo, project string
	for _, e := range notification.Events {
		if e.Target.MediaType == MEDIA_TYPE_MANIFEST && strings.HasPrefix(e.Request.UserAgent, "docker") {
			username = e.Actor.Name
			action = e.Action
			repo = e.Target.Repository
			if strings.Contains(repo, "/") {
				project = repo[0:strings.LastIndex(repo, "/")]
			}
			if username == "" {
				username = "anonymous"
			}
			go dao.AccessLog(username, project, repo, action)
			if action == "push" {
				go func() {
					err2 := svc_utils.RefreshCatalogCache()
					if err2 != nil {
						beego.Error("Error happens when refreshing cache:", err2)
					}
				}()
			}
		}
	}

}

func (n *NotificationHandler) Render() error {
	return nil
}