package wx

import (
	"encoding/json"
	"errors"
	"fmt"
)

var Wxopen = &wxopen{}

type wxopen struct {
	appid  string
	secret string
}

// InitWxopen @Title 初始化开放平台
func InitWxopen(appid, secret string) {
	Wxopen.appid = appid
	Wxopen.secret = secret
}

type AccessInfo 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"`
}
type errInfo struct {
	Errcode int    `json:"errcode"`
	Errmsg  string `json:"errmsg"`
}

type resAccess struct {
	errInfo
	AccessInfo
}

// GetAccessInfo @Title 获取微信登录验证结构体
func (w *wxopen) GetAccessInfo(code string) (result AccessInfo, err error) {
	res, err := request(get, fmt.Sprintf("https://api.weixin.qq.com/sns/oauth2/access_token?appid=%v&secret=%v&code=%v&grant_type=authorization_code", w.appid, w.secret, code), "")
	if err != nil {
		return
	}
	var resAcc resAccess
	if err = json.Unmarshal(res, &resAcc); err != nil {
		return
	}
	if resAcc.Errcode != 0 {
		return result, errors.New(resAcc.Errmsg)
	}
	result = resAcc.AccessInfo
	return
}

type userInfo struct {
	City       string   `json:"city"`
	Country    string   `json:"country"`
	Headimgurl string   `json:"headimgurl"`
	Nickname   string   `json:"nickname"`
	Openid     string   `json:"openid"`
	Privilege  []string `json:"privilege"`
	Province   string   `json:"province"`
	Sex        uint     `json:"sex"`
	Unionid    string   `json:"unionid"`
}

// GetUserInfo @Title 获取微信登录会员信息
func (w *wxopen) GetUserInfo(accessToken, openId string) (*userInfo, error) {
	res, err := request(get, fmt.Sprintf("https://api.weixin.qq.com/sns/userinfo?access_token=%s&openid=%s&lang=zh_CN", accessToken, openId), "")
	if err != nil {
		return nil, err
	}
	result := userInfo{}
	if err := json.Unmarshal(res, &result); err != nil {
		return nil, err
	}
	return &result, nil
}