/*
Copyright 2021 The Kubernetes Authors.

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 common

import (
	"encoding/json"
	"fmt"
	"io/ioutil"

	//"log"
	"net/http"

	"k8s.io/autoscaler/cluster-autoscaler/cloudprovider/tencentcloud/tencentcloud-sdk-go/common/errors"
)

type Response interface {
	ParseErrorFromHTTPResponse(body []byte) error
}

type BaseResponse struct {
}

type ErrorResponse struct {
	Response struct {
		Error struct {
			Code    string `json:"Code"`
			Message string `json:"Message"`
		} `json:"Error,omitempty"`
		RequestId string `json:"RequestId"`
	} `json:"Response"`
}

type DeprecatedAPIErrorResponse struct {
	Code     int    `json:"code"`
	Message  string `json:"message"`
	CodeDesc string `json:"codeDesc"`
}

func (r *BaseResponse) ParseErrorFromHTTPResponse(body []byte) (err error) {
	resp := &ErrorResponse{}
	err = json.Unmarshal(body, resp)
	if err != nil {
		msg := fmt.Sprintf("Fail to parse json content: %s, because: %s", body, err)
		return errors.NewTencentCloudSDKError("ClientError.ParseJsonError", msg, "")
	}
	if resp.Response.Error.Code != "" {
		return errors.NewTencentCloudSDKError(resp.Response.Error.Code, resp.Response.Error.Message, resp.Response.RequestId)
	}

	deprecated := &DeprecatedAPIErrorResponse{}
	err = json.Unmarshal(body, deprecated)
	if err != nil {
		msg := fmt.Sprintf("Fail to parse json content: %s, because: %s", body, err)
		return errors.NewTencentCloudSDKError("ClientError.ParseJsonError", msg, "")
	}
	if deprecated.Code != 0 {
		return errors.NewTencentCloudSDKError(deprecated.CodeDesc, deprecated.Message, "")
	}
	return nil
}

func ParseErrorFromHTTPResponse(body []byte) (err error) {
	resp := &ErrorResponse{}
	err = json.Unmarshal(body, resp)
	if err != nil {
		msg := fmt.Sprintf("Fail to parse json content: %s, because: %s", body, err)
		return errors.NewTencentCloudSDKError("ClientError.ParseJsonError", msg, "")
	}
	if resp.Response.Error.Code != "" {
		return errors.NewTencentCloudSDKError(resp.Response.Error.Code, resp.Response.Error.Message, resp.Response.RequestId)
	}

	deprecated := &DeprecatedAPIErrorResponse{}
	err = json.Unmarshal(body, deprecated)
	if err != nil {
		msg := fmt.Sprintf("Fail to parse json content: %s, because: %s", body, err)
		return errors.NewTencentCloudSDKError("ClientError.ParseJsonError", msg, "")
	}
	if deprecated.Code != 0 {
		return errors.NewTencentCloudSDKError(deprecated.CodeDesc, deprecated.Message, "")
	}
	return nil
}

func ParseFromHttpResponse(hr *http.Response, response Response) (err error) {
	defer hr.Body.Close()
	body, err := ioutil.ReadAll(hr.Body)
	if err != nil {
		msg := fmt.Sprintf("Fail to read response body because %s", err)
		return errors.NewTencentCloudSDKError("ClientError.IOError", msg, "")
	}
	if hr.StatusCode != 200 {
		msg := fmt.Sprintf("Request fail with http status code: %s, with body: %s", hr.Status, body)
		return errors.NewTencentCloudSDKError("ClientError.HttpStatusCodeError", msg, "")
	}
	//log.Printf("[DEBUG] Response Body=%s", body)
	err = response.ParseErrorFromHTTPResponse(body)
	if err != nil {
		return
	}
	err = json.Unmarshal(body, &response)
	if err != nil {
		msg := fmt.Sprintf("Fail to parse json content: %s, because: %s", body, err)
		return errors.NewTencentCloudSDKError("ClientError.ParseJsonError", msg, "")
	}
	return
}