// DeleteAlertAction deletes an alert at OpsGenie.
func DeleteAlertAction(c *gcli.Context) {
	cli, err := NewAlertClient(c)
	if err != nil {
		os.Exit(1)
	}

	req := alerts.DeleteAlertRequest{}
	if val, success := getVal("id", c); success {
		req.ID = val
	}
	if val, success := getVal("alias", c); success {
		req.Alias = val
	}
	req.User = grabUsername(c)
	if val, success := getVal("source", c); success {
		req.Source = val
	}

	printVerboseMessage("Delete alert request prepared from flags, sending request to OpsGenie..")

	_, err = cli.Delete(req)
	if err != nil {
		fmt.Printf("%s\n", err.Error())
		os.Exit(1)
	}

	printVerboseMessage("Alert deleted successfully.")
}
// Delete method deletes an alert at OpsGenie.
func (cli *OpsGenieAlertClient) Delete(req alerts.DeleteAlertRequest) (*alerts.DeleteAlertResponse, error) {
	req.APIKey = cli.apiKey
	resp, err := cli.sendRequest(cli.buildDeleteRequest(deleteAlertURL, req))

	if resp == nil {
		return nil, err
	}
	defer resp.Body.Close()

	var deleteAlertResp alerts.DeleteAlertResponse

	if err = resp.Body.FromJsonTo(&deleteAlertResp); err != nil {
		message := "Server response can not be parsed, " + err.Error()
		logging.Logger().Warn(message)
		return nil, errors.New(message)
	}
	return &deleteAlertResp, nil
}
func (cli *OpsGenieAlertClient) Delete(req alerts.DeleteAlertRequest) (*alerts.DeleteAlertResponse, error) {
	req.ApiKey = cli.apiKey
	// validate the mandatory parameters: apiKey, alertId/alias
	if req.ApiKey == "" {
		return nil, errors.New("ApiKey is a mandatory field and can not be empty.")
	}
	if req.AlertId == "" && req.Alias == "" {
		return nil, errors.New("Either Alert Id or Alias at least should be set in the request.")
	}
	if req.AlertId != "" && req.Alias != "" {
		return nil, errors.New("Either Alert Id or Alias should be set in the request not both.")
	}
	v, _ := goquery.Values(req)
	var resp *goreq.Response
	var err error
	for i := 0; i < cli.retries; i++ {
		resp, err = cli.buildRequest("DELETE", DELETE_ALERT_URL+"?"+v.Encode(), nil).Do()
		if err == nil {
			break
		}
		time.Sleep(TIME_SLEEP_BETWEEN_REQUESTS)
	}
	if err != nil {
		return nil, errors.New("Could not delete the alert: a problem occured while sending the request.")
	}
	// check the returning HTTP status code
	httpStatusCode := resp.StatusCode
	if httpStatusCode >= 400 && httpStatusCode < 500 {
		return nil, errors.New(fmt.Sprintf("Client error %d returned", httpStatusCode))
	}
	if httpStatusCode >= 500 {
		return nil, errors.New(fmt.Sprintf("Server error %d returned", httpStatusCode))
	}
	var deleteAlertResp alerts.DeleteAlertResponse
	// check if the response can be unmarshalled
	if err = resp.Body.FromJsonTo(&deleteAlertResp); err != nil {
		return nil, errors.New("Server response can not be parsed.")
	}
	return &deleteAlertResp, nil
}