package wechat

import (
	"context"
	"github.com/go-pay/gopay"
	"github.com/go-pay/gopay/pkg/xlog"
	"github.com/go-pay/gopay/wechat/v3"
	"time"
)

//基于此文档开发
//https://github.com/silenceper/wechat/blob/v2/doc/api/officialaccount.md
type wxpay struct {
	client *wechat.ClientV3
	ctx    context.Context
}

var WxPay = wxpay{}

// Init 初始化
func (that *wxpay) Init(MchId, SerialNo, APIv3Key, PrivateKey string) {
	client, err := wechat.NewClientV3(MchId, SerialNo, APIv3Key, PrivateKey)
	if err != nil {
		xlog.Error(err)
		return
	}
	that.client = client
	// 设置微信平台API证书和序列号（如开启自动验签，请忽略此步骤）
	//client.SetPlatformCert([]byte(""), "")
	that.ctx = context.Background()
	// 启用自动同步返回验签，并定时更新微信平台API证书（开启自动验签时，无需单独设置微信平台API证书和序列号）
	err = client.AutoVerifySign()
	if err != nil {
		xlog.Error(err)
		return
	}

	// 打开Debug开关，输出日志，默认是关闭的
	client.DebugSwitch = gopay.DebugOn
}

// GetUserInfo 获取用户信息
func (that *wxpay) GetJsOrder(money int64, appid, name, tradeNo, notifyUrl string) (jsApiParams *wechat.JSAPIPayParams, err error) {

	PrepayId, err := that.getPrepayId(money, name, tradeNo, notifyUrl)
	if err != nil {
		return nil, err
	}
	//小程序
	jsapi, err := that.client.PaySignOfJSAPI(appid, PrepayId)
	return jsapi, err
}

// GetUserInfo 获取用户信息
func (that *wxpay) GetMiniOrder(money int64, appid, name, tradeNo, notifyUrl string) (jsApiParams *wechat.AppletParams, err error) {

	PrepayId, err := that.getPrepayId(money, name, tradeNo, notifyUrl)
	if err != nil {
		return nil, err
	}

	//小程序
	applet, err := that.client.PaySignOfApplet(appid, PrepayId)

	return applet, err
}

func (that *wxpay) getPrepayId(money int64, name, tradeNo, notifyUrl string) (prepayid string, err error) {
	expire := time.Now().Add(10 * time.Minute).Format(time.RFC3339)
	// 初始化 BodyMap
	bm := make(gopay.BodyMap)
	bm.Set("sp_appid", "sp_appid").
		Set("sp_mchid", "sp_mchid").
		Set("sub_mchid", "sub_mchid").
		Set("description", name).
		Set("out_trade_no", tradeNo).
		Set("time_expire", expire).
		Set("notify_url", notifyUrl).
		SetBodyMap("amount", func(bm gopay.BodyMap) {
			bm.Set("total", money).
				Set("currency", "CNY")
		}).
		SetBodyMap("payer", func(bm gopay.BodyMap) {
			bm.Set("sp_openid", "asdas")
		})
	//ctx:=context.Context()

	wxRsp, err := that.client.V3TransactionJsapi(that.ctx, bm)
	if err != nil {
		xlog.Error(err)
		return "", err
	}
	return wxRsp.Response.PrepayId, nil
}