/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 whisk

import (
	"errors"
	"fmt"
	"github.com/apache/incubator-openwhisk-client-go/wski18n"
	"net/http"
	"net/url"
)

type Info struct {
	Whisk   string `json:"whisk,omitempty"`
	Version string `json:"version,omitempty"`
	Build   string `json:"build,omitempty"`
	BuildNo string `json:"buildno,omitempty"`
}

type InfoService struct {
	client *Client
}

func (s *InfoService) Get() (*Info, *http.Response, error) {
	// make a request to c.BaseURL / v1
	err := s.client.LoadX509KeyPair()
	if err != nil {
		return nil, nil, err
	}
	urlStr := fmt.Sprintf("%s/%s", s.client.BaseURL.String(), s.client.Config.Version)
	u, err := url.Parse(urlStr)
	if err != nil {
		Debug(DbgError, "url.Parse(%s) error: %s\n", urlStr, err)
		errStr := wski18n.T("Unable to URL parse '{{.version}}': {{.err}}",
			map[string]interface{}{"version": urlStr, "err": err})
		werr := MakeWskError(errors.New(errStr), EXIT_CODE_ERR_GENERAL, DISPLAY_MSG, NO_DISPLAY_USAGE)
		return nil, nil, werr
	}

	req, err := http.NewRequest("GET", u.String(), nil)
	if err != nil {
		Debug(DbgError, "http.NewRequest(GET, %s) error: %s\n", u.String(), err)
		errStr := wski18n.T("Unable to create HTTP request for GET '{{.url}}': {{.err}}",
			map[string]interface{}{"url": u.String(), "err": err})
		werr := MakeWskError(errors.New(errStr), EXIT_CODE_ERR_GENERAL, DISPLAY_MSG, NO_DISPLAY_USAGE)
		return nil, nil, werr
	}

	Debug(DbgInfo, "Sending HTTP URL '%s'; req %#v\n", req.URL.String(), req)
	info := new(Info)
	resp, err := s.client.Do(req, &info, ExitWithSuccessOnTimeout)
	if err != nil {
		Debug(DbgError, "s.client.Do() error - HTTP req %s; error '%s'\n", req.URL.String(), err)
		return nil, nil, err
	}

	return info, resp, nil
}