package auth

import (
	"errors"
	"golib.gaore.com/GaoreGo/gaore-common-sdk-go/sdk/auth/credentials"
	"golib.gaore.com/GaoreGo/gaore-common-sdk-go/sdk/auth/signers"
	"golib.gaore.com/GaoreGo/gaore-common-sdk-go/sdk/requests"
	"golib.gaore.com/GaoreGo/gaore-common-sdk-go/sdk/responses"
	"net/http"
)

type Signer interface {
	GetName() string
	GetAccessKeyId() (string, error)
	GetAccessKeyFrom() (string, error)
	Sign(stringToSign, secretSuffix string) string
}

func NewSignerWithCredential(credential Credential, commonApi func(request *requests.CommonRequest, signer interface{}) (response *responses.CommonResponse, err error)) (signer Signer, err error) {
	switch instance := credential.(type) {
	case *credentials.AccessKeyCredential:
		signer = signers.NewAccessKeySigner(instance)
	case *credentials.BaseCredential:
		signer = signers.NewAccessKeySigner(instance.ToAccessKeyCredential())
	case *credentials.StdTokenCredential:
		signer = signers.NewStsTokenSigner(instance)
	case *credentials.AliAppcodeCredential:
		signer = signers.NewAliAppcodeSigner(instance)
	default:
		err = errors.New("UnsupportedCredentialErrorCode  = SDK.UnsupportedCredential")
	}
	return
}

func Sign(request requests.AcsRequest, signer Signer) (err error) {
	switch signer.(type) {
	case *signers.AliAppcodeSigner:
		err = signRaliRequest(request, signer)
		return
	}

	//TODO 根据rpc和roa两种风格签名，自行选择
	switch request.GetStyle() {
	case requests.RPC:
		err = signRpcRequest(request, signer)
	case requests.ROA:
		err = signRoaRequest(request, signer)
	}
	return
}

func UnSign(request *http.Request, signer Signer) (err error) {
	//TODO 根据rpc和roa两种风格签名，自行选择
	err = unsignRpcRequest(request, signer)
	return
}