/*
Copyright 2015 The Kubernetes Authors 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 jenkins

import (
	"encoding/json"
	"io/ioutil"
	"net/http"

	"github.com/golang/glog"
)

type JenkinsClient struct {
	Host string
}

type Queue struct {
	Builds             []Build `json:"builds"`
	LastCompletedBuild Build   `json:"lastCompletedBuild"`
	LastStableBuild    Build   `json:"lastStableBuild"`
}

type Build struct {
	Number int    `json:"number"`
	URL    string `json:"url"`
}

type Job struct {
	Result    string `json:"result"`
	ID        string `json:"id"`
	Timestamp int    `json:timestamp`
}

func (j *JenkinsClient) request(path string) ([]byte, error) {
	url := j.Host + path
	glog.V(3).Infof("Hitting: %s", url)
	res, err := http.Get(url)
	if err != nil {
		return nil, err
	}
	defer res.Body.Close()
	return ioutil.ReadAll(res.Body)
}

func (j *JenkinsClient) GetJob(name string) (*Queue, error) {
	data, err := j.request("/job/" + name + "/api/json")
	if err != nil {
		return nil, err
	}
	glog.V(8).Infof("Got data: %s", string(data))
	q := &Queue{}
	if err := json.Unmarshal(data, q); err != nil {
		return nil, err
	}
	return q, nil
}

func (j *JenkinsClient) GetLastCompletedBuild(name string) (*Job, error) {
	data, err := j.request("/job/" + name + "/lastCompletedBuild/api/json")
	if err != nil {
		return nil, err
	}
	glog.V(8).Infof("Got data: %s", string(data))
	job := &Job{}
	if err := json.Unmarshal(data, job); err != nil {
		return nil, err
	}
	return job, nil
}

func (j *JenkinsClient) IsBuildStable(name string) (bool, error) {
	q, err := j.GetLastCompletedBuild(name)
	if err != nil {
		return false, err
	}
	return q.Result == "SUCCESS", nil
}