package weixin

import (
	"encoding/json"
	"fmt"
	"gitee.com/h79/gothird/weixin/access"
	"gitee.com/h79/gothird/weixin/consts"
	"gitee.com/h79/gothird/weixin/response"
	"gitee.com/h79/goutils/common/data"
	"gitee.com/h79/goutils/common/http"
	"gitee.com/h79/goutils/token"
	tokenaccess "gitee.com/h79/goutils/token/access"
)

// 1 公众号: 全局唯一接口调用凭据
// 2 小程序: 全局唯一后台接口调用凭据（access_token）。调用绝大多数后台接口时都需使用 access_token
// 这种没有刷新refreshToken, 只有到期时，再调用一次，取一个新的access token
func getTokenUrl(appId, secret string) string {
	return fmt.Sprintf("%s/cgi-bin/token?grant_type=client_credential&appid=%s&secret=%s", consts.ApiPrefixUrl, appId, secret)
}

func GetAccessToken(tk token.Token, d data.D) (tokenaccess.Token, error) {
	var appId = tk.GetAppId()
	var secret = tk.GetSecret()
	if appId == "" {
		return nil, fmt.Errorf("app id is empty")
	}
	if secret == "" {
		return nil, fmt.Errorf("secret is empty")
	}
	var hp = http.Http{}
	var body, err = hp.DoBytes("GET", getTokenUrl(appId, secret), nil)
	if err != nil {
		return nil, err
	}

	type tokenResult struct {
		response.Response
		access.Token
	}

	res := tokenResult{}

	if err = json.Unmarshal(body, &res); err != nil {
		return nil, err
	}

	return &res.Token, res.ErrorIf()
}