package netboxgo

import (
	"crypto/tls"
	"encoding/json"
	"io/ioutil"
	"net/http"
	"net/url"
	"strings"
	"time"

	"github.com/pkg/errors"
)

// NetBox settings struct
type NetBox struct {
	RootURL            string
	Token              string
	SessionKey         string
	InsecureSkipVerify bool
}

// NetBoxSessionKey sets the session key for secrets retrieval
type NetBoxSessionKey struct {
	XSessionKey string `json:"session_key"`
}

// New populates the NetBox settings struct
func (n *NetBox) New(root, token string, TLSSkipVerify bool) {
	n.RootURL = root
	n.Token = token
	n.InsecureSkipVerify = TLSSkipVerify
}

// FetchSessionKey fetches sessionkey
func (n *NetBox) FetchSessionKey(privatekey string) error {

	form := url.Values{}
	form.Add("private_key", privatekey)
	query := form.Encode()

	transport := &http.Transport{
		TLSClientConfig: &tls.Config{InsecureSkipVerify: n.InsecureSkipVerify},
	}
	timeout := time.Duration(60 * time.Second)
	client := &http.Client{
		Timeout:   timeout,
		Transport: transport,
	}
	request, err := http.NewRequest("POST", n.RootURL+"/api/secrets/get-session-key/", strings.NewReader(query))
	if err != nil {
		return err
	}
	request.Header.Add("Accept", "application/json")
	request.Header.Add("Content-Type", "application/x-www-form-urlencoded")
	request.Header.Add("Authorization", " Token "+n.Token)
	response, err := client.Do(request)
	if err != nil {
		return err
	}

	if response.StatusCode != http.StatusOK {
		return errors.Errorf("Error: response was: %d should be %d\n%s\n", response.StatusCode, http.StatusOK, response.Header)
	}

	data, err := ioutil.ReadAll(response.Body)
	if err != nil {
		return err
	}

	err = response.Body.Close()
	if err != nil {
		return err
	}

	var sessionkey NetBoxSessionKey
	err = json.Unmarshal(data, &sessionkey)
	if err != nil {
		return err
	}
	n.SessionKey = sessionkey.XSessionKey

	return nil
}