package elmapi

import (
	"fmt"

	"git.rosy.net.cn/baseapi"
	"git.rosy.net.cn/baseapi/platformapi"
	"git.rosy.net.cn/baseapi/utils"
	"github.com/fatih/structs"
)

// https://open.shop.ele.me/openapi/documents/callback
const (
	MsgTypeOrderValid        = 10
	MsgTypeMerchantValid     = 12
	MsgTypeOrderCanceled     = 14
	MsgTypeMerchantInvalid   = 15
	MsgTypeOrderForceInvalid = 17
	MsgTypeOrderFinished     = 18
)

type CallbackResponse struct {
	Message string `json:"message"`
}

type CallbackMsg struct {
	AppID     int    `json:"appId"`
	RequestID string `json:"requestId"`
	Type      int    `json:"type"`
	Message   string `json:"message"`
	ShopID    int    `json:"shopId"`
	Timestamp int64  `json:"timestamp"`
	UserID    int64  `json:"userId"`
	Signature string `json:"signature"`
}

var (
	SuccessResponse = &CallbackResponse{"ok"}
)

func (e *API) unmarshalData(data []byte, msg interface{}) (callbackResponse *CallbackResponse) {
	err := utils.UnmarshalUseNumber(data, msg)
	if err != nil {
		return &CallbackResponse{
			Message: fmt.Sprintf(platformapi.ErrStrUnmarshalError, data, err),
		}
	}
	return nil
}

func (e *API) CheckCallbackValidation(mapData map[string]interface{}) (callbackResponse *CallbackResponse) {
	sign := e.signParamsMap(mapData, "")
	if remoteSign, _ := mapData[signKey].(string); sign != remoteSign {
		baseapi.SugarLogger.Infof("Signature is not ok, mine:%v, get:%v", sign, remoteSign)
		return &CallbackResponse{Message: platformapi.ErrStrCallbackSignatureIsWrong}
	}
	return nil
}

func (e *API) GetCallbackMsg(data []byte) (msg *CallbackMsg, callbackResponse *CallbackResponse) {
	msg = new(CallbackMsg)
	if callbackResponse = e.unmarshalData(data, msg); callbackResponse != nil {
		return nil, callbackResponse
	}

	mapData := structs.Map(msg)
	callbackResponse = e.CheckCallbackValidation(mapData)
	return msg, callbackResponse
}