package auth

import (
	"golib.gaore.com/GaoreGo/gaore-common-sdk-go/sdk/requests"
	"golib.gaore.com/GaoreGo/gaore-common-sdk-go/sdk/utils"
	"net/url"
	"strings"
)

func signHttpRequest(request requests.AcsRequest, signer Signer) (err error) {
	err = completeHttpSignParams(request, signer)
	if err != nil {
		return
	}
	if _, isContainsSign := request.GetQueryParams()["Sign"]; isContainsSign {
		delete(request.GetQueryParams(), "Sign")
	}
	stringToSign := buildHttpStringToSign(request)
	request.SetStringToSign(stringToSign)
	signature := signer.Sign(stringToSign, "&")
	request.GetQueryParams()["Sign"] = signature
	return
}

func completeHttpSignParams(requests requests.AcsRequest, signer Signer) (err error) {
	return
}

func buildHttpStringToSign(request requests.AcsRequest) (stringToSign string) {
	signParams := make(map[string]string)
	for key, value := range request.GetQueryParams() {
		signParams[key] = value
	}
	for key, value := range request.GetFormParams() {
		signParams[key] = value
	}

	stringToSign = utils.GetUrlFormedMap(signParams)
	stringToSign = strings.Replace(stringToSign, "+", "%20", -1)
	stringToSign = strings.Replace(stringToSign, "*", "%2A", -1)
	stringToSign = strings.Replace(stringToSign, "%7E", "~", -1)
	stringToSign = url.QueryEscape(stringToSign)
	stringToSign = request.GetMethod() + "&%2F&" + stringToSign
	return
}