package utils

import (
	"context"
	"path"
	"strings"

	"github.com/wechatpay-apiv3/wechatpay-go/core"
	"github.com/wechatpay-apiv3/wechatpay-go/core/consts"
	"github.com/wechatpay-apiv3/wechatpay-go/core/option"

	"github.com/wechatpay-apiv3/wechatpay-go/services/fileuploader"
	weutils "github.com/wechatpay-apiv3/wechatpay-go/utils"
	"io"

	"property-company-gateway/parser"

	"google.golang.org/grpc/status"
)

func WxUpload(f io.Reader, fileName string, objName string) (string, error){
	if objName == "" {
		return "", status.Error(10002, "对象名不能为空")
	}

	mchID := parser.Conf.ThirdParty.Wx.MerchantMchID
	mchCertificateSerialNumber := parser.Conf.ThirdParty.Wx.MerchantMchCertificateSerialNumber
	mchAPIv3Key := parser.Conf.ThirdParty.Wx.MerchantMchAPIv3Key


	// 使用 utils 提供的函数从本地文件中加载商户私钥，商户私钥会用来生成请求的签名
	mchPrivateKey, err := weutils.LoadPrivateKey(parser.Conf.ThirdParty.Wx.MerchantMchPrivateKey)
	if err != nil {
		return "", status.Error(10002, "密钥加载失败")
	}

	ctx := context.Background()
	// 使用商户私钥等初始化 client，并使它具有自动定时获取微信支付平台证书的能力
	opts := []core.ClientOption{
		option.WithWechatPayAutoAuthCipher(mchID, mchCertificateSerialNumber, mchPrivateKey, mchAPIv3Key),
	}
	client, err := core.NewClient(ctx, opts...)
	if err != nil {
		return "", status.Error(10002, "new client error:"+err.Error())
	}

	pt := consts.ImageJPG
	tail := path.Ext(fileName)
	tail = strings.ToLower(tail)
	switch  {
	case strings.Contains(tail, "jpg"):
		pt = consts.ImageJPG
	case strings.Contains(tail, "png"):
		pt = consts.ImagePNG
	default:
		return "", status.Error(10002, "只支持png和jpg图片")
	}

	svc := fileuploader.ImageUploader{Client: client}
	resp, _, err := svc.Upload(ctx, f, objName, pt)

	if err != nil {
		// 处理错误
		return "", status.Error(10002, "svc.Upload error:"+err.Error())
	}
	return *resp.MediaId, nil
}