package payCenter

import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"net/http"

	"videoweb/pub/common/httputil"
	"videoweb/pub/common/log"
	"videoweb/pub/common/srvdef"
)

// Recharge 使用新支付中心的元字符串金额和商户 MD5 签名协议。
type Recharge struct {
	Ctx             context.Context `json:"-"`
	Time            string          `json:"time"`
	Sign            string          `json:"sign"`
	MercID          string          `json:"mercId"`
	Type            string          `json:"type"`
	Money           string          `json:"money"`
	TradeNo         string          `json:"tradeNo"`
	NotifyUrl       string          `json:"notifyUrl"`
	CancelNotifyUrl string          `json:"cancelNotifyUrl,omitempty"`
	Info            PayInfo         `json:"info"`
	SignType        string          `json:"signType"`
	Mode            string          `json:"mode"`
	Payload         string          `json:"payload"`
}

type PayInfo struct {
	App        string `json:"app"`
	PlayerId   string `json:"playerId"`
	PlayerIp   string `json:"playerIp"`
	DeviceType string `json:"deviceType"`
	DeviceId   string `json:"deviceId"`
	Name       string `json:"name"`
	Tel        string `json:"tel"`
	AlipayAct  string `json:"alipayAct"`
}

type PayResp struct {
	Code   srvdef.CodeType `json:"code"`
	OID    string          `json:"oid"`
	PayUrl string          `json:"payUrl"`
	Mode   string          `json:"mode"`
	Rebate string          `json:"rebate"`
	Sign   string          `json:"sign"`
}

type RechargeResp struct {
	Code int     `json:"code"`
	Info string  `json:"info"`
	Err  string  `json:"err"`
	Msg  PayResp `json:"msg"`
	Tip  string  `json:"tip"`
}

type RechargeCallbackResp struct {
	Code     int    `json:"code" binding:"required"`
	MercID   string `json:"mercId" binding:"required"`
	OID      string `json:"oid" binding:"required"`
	PayMoney string `json:"payMoney" binding:"required"`
	TradeNo  string `json:"tradeNo" binding:"required"`
	Sign     string `json:"sign" binding:"required"`
}

type RefundCallbackResp struct {
	Code    int    `json:"code"`
	MercID  string `json:"mercId"`
	OID     string `json:"oid"`
	TradeNo string `json:"tradeNo"`
	Sign    string `json:"sign"`
}

type rechargePostFunc func(context.Context, *Recharge, *RechargeResp) (int, error)

func (in *Recharge) ToPayNew() (PayResp, error) {
	return in.toPayNew(func(ctx context.Context, request *Recharge, response *RechargeResp) (int, error) {
		return httputil.NewCtx(ctx).POSTJsonWithJResp(response, request.GetURL(), nil, request)
	})
}

func (in *Recharge) toPayNew(post rechargePostFunc) (result PayResp, err error) {
	defer func() {
		if recovered := recover(); recovered != nil {
			result = PayResp{}
			err = fmt.Errorf("pay center request panic: %v", recovered)
			if in != nil {
				log.Error("【新支付中心 /api/shark/topay】请求异常", log.Any("tradeNo", in.TradeNo), log.E(err))
			}
		}
		if in != nil {
			if err != nil {
				log.Error("【新支付中心 /api/shark/topay】下单失败", log.Any("tradeNo", in.TradeNo), log.E(err))
			} else {
				log.Info("【新支付中心 /api/shark/topay】下单成功", log.Any("tradeNo", in.TradeNo), log.Any("oid", result.OID))
			}
		}
	}()
	if in == nil {
		return result, errors.New("pay center request: nil recharge")
	}
	if post == nil {
		return result, errors.New("pay center request: nil poster")
	}
	if err := validateConfig(true); err != nil {
		return result, err
	}
	amount, err := ParseYuanToFen(in.Money)
	if err != nil || amount <= 0 || in.TradeNo == "" || in.Type == "" {
		return result, errors.New("新支付中心下单参数错误：订单号、支付方式和正数金额不能为空")
	}
	in.fill()

	var response RechargeResp
	code, requestErr := post(in.Ctx, in, &response)
	if requestErr != nil {
		return result, fmt.Errorf("post pay center order: %w", requestErr)
	}
	if code != http.StatusOK {
		return result, fmt.Errorf("pay center returned HTTP status %d", code)
	}
	if response.Code != http.StatusOK {
		return result, fmt.Errorf("pay center returned provider code %d", response.Code)
	}
	if response.Err != "" {
		return result, fmt.Errorf("pay center rejected order: %s", response.Err)
	}
	// 外层成功但没有订单号/支付链接不能落为处理中订单。
	if response.Msg.OID == "" || response.Msg.PayUrl == "" {
		return result, errors.New("新支付中心下单结果缺少订单号或支付链接")
	}
	return response.Msg, nil
}

func (in *Recharge) fill() {
	in.MercID = in.GetMercID()
	in.Time = Generate13DigitString()
	in.Info.App = payCenterConf.AppName
	in.NotifyUrl = in.GetNotifyURL()
	in.SignType = "1"
	in.Sign = in.sign()
}

func (in *Recharge) GetNotifyURL() string {
	return payCenterConf.CallbackUrl + "/api/web/third/newpaycenter/recharge/callback"
}

func (in *Recharge) GetCancelNotifyURL() string {
	return payCenterConf.CallbackUrl + "/api/web/third/newpaycenter/refund/callback"
}

func (in *Recharge) sign() string {
	// 字段顺序必须与 girl 及支付中心约定一致，金额使用原始元字符串。
	var body bytes.Buffer
	body.WriteString(in.MercID)
	body.WriteString(in.Money)
	body.WriteString(in.NotifyUrl)
	body.WriteString(in.TradeNo)
	body.WriteString(in.Type)
	body.WriteString(in.GetAppSecret())
	return md5Sign(body.String())
}

func (in *Recharge) GetURL() string {
	return payCenterConf.ApiUrl + "/api/shark/topay"
}

func (in *Recharge) Success() string {
	return "success"
}

func (in *Recharge) GetAppSecret() string {
	return payCenterConf.MercSecret
}

func (in *Recharge) GetMercID() string {
	return payCenterConf.MercID
}