package platform

import "SciencesServer/utils"

type Wechat struct{}

type WechatScan struct{}

type WechatScanHandle func() *WechatScan

type (
	WechatBasicRequest struct {
		AppID, Secret string
	}
	WechatErrorResponse struct {
		ErrCode int `json:"errcode"`
		ErrMsg  int `json:"errmsg"`
	}
	// WechatAccessTokenRequest 请求AccessToken参数
	WechatAccessTokenRequest struct {
		WechatBasicRequest
		Code string
	}
	// WechatAccessTokenResponse 获取AccessToken响应参数
	WechatAccessTokenResponse struct {
		AccessToken  string `json:"access_token"`
		ExpiresIn    int    `json:"expires_in"`
		RefreshToken string `json:"refresh_token"`
		OpenID       string `json:"openid"`
		Scope        string `json:"scope"`
		UnionID      string `json:"unionid"`
		*WechatErrorResponse
	}
)

const (
	// WechatAccessTokenUrl AccessToken访问地址
	WechatAccessTokenUrl string = "https://api.weixin.qq.com/sns/oauth2/access_token"
)

func (this *WechatScan) Login() {

}

func (this *WechatScan) Pay() {

}

// AccessToken AccessToken操作
func (this *Wechat) AccessToken(req *WechatAccessTokenRequest) (*WechatAccessTokenResponse, error) {
	params := map[string]interface{}{
		"appid": req.AppID, "secret": req.Secret, "code": req.Code, "grant_type": "authorization_code",
	}
	resp, err := utils.NewClient(WechatAccessTokenUrl, utils.MethodForGet, params).Request(utils.RequestBodyFormatForXWWWFormUrlencoded)

	if err != nil {
		return nil, err
	}
	out := new(WechatAccessTokenResponse)

	if err = utils.FromJSONBytes(resp, out); err != nil {
		return nil, err
	}
	return out, nil
}

// Scan 扫码操作
func (this *Wechat) Scan() WechatScanHandle {
	return func() *WechatScan {
		return &WechatScan{}
	}
}

func NewWechat() *Wechat {
	return nil
}