package public_platform

import (
	"encoding/json"
	"errors"
	"net/http"

	"git.valavala.com/vala/development-kit-sdk/utils"
	access_token "git.valavala.com/vala/development-kit-sdk/wechat-sdk/access-token"
	"git.valavala.com/vala/development-kit-sdk/wechat-sdk/structs"
)

type PublicPlatform struct {
}

func NewWechatPublicPlatform() *PublicPlatform {
	return &PublicPlatform{}
}

// GetFans 获取公众号的关注列表
// https://api.weixin.qq.com/cgi-bin/user/get?access_token=ACCESS_TOKEN&next_openid=OPENID
func (p *PublicPlatform) GetFans(wechatConf *structs.WechatConf, nextOpenid string) (*structs.WechatPublicPlatformFansResp, error) {
	mgr := access_token.NewWechatStableAccessTokenMgr()
	accessToken, err := mgr.GetStableAccessToken(wechatConf)
	if err != nil {
		return nil, err
	}
	url := "https://api.weixin.qq.com/cgi-bin/user/get?access_token=" + accessToken + "&next_openid=" + nextOpenid

	header := map[string]string{
		"Content-Type": "application/json",
	}
	resp, err := utils.HttpRequest(http.MethodGet, url, header, nil)
	if err != nil {
		return nil, err
	}
	wechatPublicPlatformFansResp := &structs.WechatPublicPlatformFansResp{}
	_ = json.Unmarshal(resp, wechatPublicPlatformFansResp)
	if wechatPublicPlatformFansResp.Errcode != 0 {
		return nil, errors.New(wechatPublicPlatformFansResp.Errmsg)
	}
	return wechatPublicPlatformFansResp, nil
}