/*
 * Copyright 2024. Huawei Technologies Co., Ltd. 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 harmonyos

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io/ioutil"
	"net/http"
	"time"
)

type IapServer struct {
}

const (
	// URL_ROOT IAP Server Root Url
	URL_ROOT = "https://iap.cloud.huawei.com"

	TIME_OUT = time.Second * 5 // TODO: Need to replace it with the actual business logic.

	WHITE_SPACE = " "
)

func (iap *IapServer) httpPost(url string, bodyMap map[string]interface{}) (string, error) {
	bodyData, err := json.Marshal(bodyMap)
	if err != nil {
		return "", err
	}

	req, err := http.NewRequest("POST", url, bytes.NewReader(bodyData))
	if err != nil {
		return "", err
	}

	jwtGenerator := &JWTGenerator{}
	jwt, err := jwtGenerator.GenJWT(bodyMap)
	if err != nil {
		return "", err
	}
	req, err = iap.BuildAuthorization(req, jwt)

	var RequestHttpClient = http.Client{Timeout: TIME_OUT}
	response, err := RequestHttpClient.Do(req)
	if err != nil {
		return "", err
	}

	bodyBytes, err := ioutil.ReadAll(response.Body)
	return string(bodyBytes), err
}

func (iap *IapServer) BuildAuthorization(req *http.Request, jwt string) (*http.Request, error) {
	var authHeader = fmt.Sprintf("Bearer%s%s", WHITE_SPACE, jwt)
	req.Header.Set("Content-Type", "application/json; charset=UTF-8")
	req.Header.Set("Authorization", authHeader)
	return req, nil
}