package payment

import (
	"encoding/json"
	"eta/eta_mini_ht_api/common/component/cache"
	logger "eta/eta_mini_ht_api/common/component/log"
	"eta/eta_mini_ht_api/common/utils/redis"
	"fmt"
	"github.com/google/uuid"
	"github.com/mitchellh/mapstructure"
	"strings"
	"time"
)

const (
	PENDING = "pending"
	READY   = "ready"
	USED    = "used"
	EXPIRED = "expired"
)

var (
	rdb = cache.GetInstance()
)

// PaymentToken Redis存储结构
type PaymentToken struct {
	PaymentParams *PaymentParam `json:"payment_params"`
	ExpireTime    int64         `json:"expire_time"`
}

// PaymentParam 支付参数结构
type PaymentParam struct {
	ProductOrderNo string `json:"product_order_no" mapStruct:"ProductOrderNo"`
	PayOrderNo     string `json:"pay_order_no" mapStruct:"PayOrderNo"`
	Package        string `json:"package" mapStruct:"Package"`
	Timestamp      string `json:"timestamp" mapStruct:"Timestamp"`
	NonceStr       string `json:"nonce_str" mapStruct:"NonceStr"`
	PaySign        string `json:"pay_sign" mapStruct:"PaySign"`
	SignType       string `json:"sign_type" mapStruct:"SignType"`
	Status         string `json:"status"  mapStruct:"Status"`
}

// SavePaymentToken Redis操作辅助函数
func SavePaymentToken(pt *PaymentToken) (token string, err error) {
	//需要过期所有的对应产品订单的历史支付订单
	keys, _ := rdb.Keys("payment:token:*")
	for _, key := range keys {
		payParam, _ := GetPaymentParam(strings.TrimPrefix(key, "payment:token:"))
		if payParam.PayOrderNo != "" && payParam.ProductOrderNo != "" && payParam.Status != "" {
			payParam.Status = EXPIRED
			jsonData, _ := json.Marshal(pt)
			_ = rdb.UpdateHSetNoExpire(key, jsonData)
		}
	}
	token = generateWechatOrderToken()
	paramMap, err := StructToMap(pt.PaymentParams)
	if err != nil {
		return
	}
	err = rdb.SetHSet(redis.GenerateWechatOrderToken(token), time.Until(time.Unix(pt.ExpireTime, 0)), paramMap)
	return
}
func StructToMap(v interface{}) (mapResult map[string]string, err error) {
	mapResult = make(map[string]string)
	decoder, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
		Result:  &mapResult,
		TagName: "mapStruct",
	})
	if err != nil {
		return nil, err
	}
	err = decoder.Decode(v)
	if err != nil {
		return nil, err
	}
	return
}
func MapToStruct(mapResult map[string]string, v interface{}) (err error) {
	decoder, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
		Result:  v,
		TagName: "mapStruct",
	})
	if err != nil {
		return
	}
	err = decoder.Decode(mapResult)
	if err != nil {
		return
	}
	return
}
func GetPaymentParam(token string) (paymentParam PaymentParam, err error) {
	val := rdb.GetHSet("payment:token:" + token)
	err = MapToStruct(val, &paymentParam)
	if err != nil {
		logger.Error("生成微信订单token失败，%v", err)
		return
	}
	if paymentParam.ProductOrderNo == "" || paymentParam.PayOrderNo == "" {
		err = fmt.Errorf("订单信息不存在:" + token)
	}
	return
}

// GenerateWechatOrderToken 生成token
func generateWechatOrderToken() (token string) {
	return strings.ReplaceAll(uuid.New().String(), "-", "")
}