package wx

import (
	"errors"
	"fmt"
	"git.qianqiusoft.com/qianqiusoft/light-apiengine/entitys"
	"git.qianqiusoft.com/qianqiusoft/light-apiengine/models"
	"git.qianqiusoft.com/qianqiusoft/light-apiengine/utils"
	"github.com/silenceper/wechat/js"
	"github.com/silenceper/wechat/oauth"
	"github.com/silenceper/wechat/pay"
	"github.com/silenceper/wechat/util"
	"net/url"
	"strconv"
	"strings"
)

var wxPayCallbackHandler func(result *pay.NotifyResult)models.SysReturn = nil

// 注册微信支付回调处理函数
func RegisterWxPayCallbackHandler(handler func(result *pay.NotifyResult)models.SysReturn){
	wxPayCallbackHandler = handler
}

func CallWxPayCallbackHandler(c *entitys.CtrlContext)models.SysReturn{
	if wxPayCallbackHandler == nil{
		return models.SysReturn{500, "微信支付回调处理函数为空", nil}
	}
	notifyRet := pay.NotifyResult{}
	err := c.Ctx.BindXML(&notifyRet)
	if err != nil{
		fmt.Println("******************----》微信支付回调bindxml错误", err.Error())
		return models.SysReturn{500, err.Error(), nil}
	}
	return wxPayCallbackHandler(&notifyRet)
}

// 扫码支付
func PayNative(params *PayParams)(*pay.PayResult, error){
	ip := utils.GetIP(params.Ctx)
	attach := params.Attach
	if attach == ""{
		attach = params.Ctx.Ctx.GetString("user_id")
		if attach == ""{
			attach = "attach"
		}
	}
	body := params.Body
	if body == ""{
		body = "body"
	}
	if params.OutTradeNo == ""{
		return nil, errors.New("交易单号为空")
	}
	parParams := pay.Params{strconv.Itoa(params.TotalFee), ip, body, attach, params.OutTradeNo, ""}
	return wc.GetPay().PreNative(&parParams)
}

// jsapi 支付
func PayJSAPI(params *PayParams)(*JSAPIPayConfig, error){
	openId := params.OpenId
	if openId == ""{
		return nil, errors.New("openid 为空")
	}
	if params.OutTradeNo == ""{
		return nil, errors.New("交易单号为空")
	}

	attach := params.Attach
	if attach == ""{
		attach = params.Ctx.Ctx.GetString("user_id")
		if attach == ""{
			attach = "attach"
		}
	}
	body := params.Body
	if body == ""{
		body = "body"
	}
	ip := utils.GetIP(params.Ctx)

	payParams := pay.Params{strconv.Itoa(params.TotalFee), ip, body, attach, params.OutTradeNo, params.OpenId}
	payObj := wc.GetPay()
	prePayID, err := payObj.PrePayID(&payParams)
	if err != nil{
		fmt.Println("----------------->prepayid error", err.Error())
		return nil, err
	}

	nonceStr := util.RandomStr(32)
	timestamp := util.GetCurrTs()
	pack := "prepay_id=" + prePayID
	template := "appId=%s&nonceStr=%s&package=%s&signType=MD5&timeStamp=%s&key=%s"
	str := fmt.Sprintf(template, payObj.AppID, nonceStr, pack, strconv.FormatInt(timestamp, 10), payObj.PayKey)
	sign := util.MD5Sum(str)

	payCfg := pay.Config{timestamp, nonceStr, prePayID, "MD5", sign}
	exPayConfig := JSAPIPayConfig{}
	exPayConfig.AppId = wxConfig.AppId
	exPayConfig.NonceStr = payCfg.NonceStr
	exPayConfig.OutTradeNo = params.OutTradeNo
	exPayConfig.Package = "prepay_id=" + payCfg.PrePayID
	exPayConfig.PaySign = payCfg.Sign
	exPayConfig.SignType = payCfg.SignType
	exPayConfig.Timestamp = strconv.Itoa(int(payCfg.Timestamp))

	if err==nil {
		return &exPayConfig, nil
	}else{
		return nil, err
	}
}

// 获取微信OAuth认证参数
func GetOAuthParams(paramMap map[string]string)(*WxOAuthConfig, error){
	config := WxOAuthConfig{}
	urlstr := wxConfig.RedirectUrl
	paramstr := ""
	for k, v := range paramMap{
		paramstr += fmt.Sprintf("%s=%s", k, url.QueryEscape(v))
	}
	if strings.Index(urlstr, "%s") > 0{
		urlstr = fmt.Sprintf(urlstr, paramstr)
	}

	url, err := wxoauth.GetRedirectURL(urlstr, wxConfig.Scope, url.QueryEscape(wxConfig.State))
	if err != nil{
		return nil, err
	}
	config.OAuthRedirectUrl = url
	config.AppId = wxConfig.AppId
	config.State = wxConfig.State
	config.Scope = wxConfig.Scope
	config.ResponseType = wxConfig.ResponseType
	config.AuthUrl = "https://open.weixin.qq.com/connect/oauth2/authorize"
	config.RedirectUrl = wxConfig.RedirectUrl

	return &config, nil
}

// 获取jssdk配置参数
func GetJSSDKRarams(url string)(*js.Config, error){
	return wc.GetJs().GetConfig(url)
}

// 获取token
func GetOpenId(code string)(string, error){
	resToken, err := wxoauth.GetUserAccessToken(code)
	if err == nil{
		addToken(resToken.OpenID, &resToken)
	}
	return resToken.OpenID, err
}

// 根据code获取用户信息（需scope为 snsapi_userinfo）
func GetUserInfoByCode(code string)(*oauth.UserInfo, error){
	openId, err := GetOpenId(code)
	if err != nil{
		return nil, err
	}
	return GetUserInfo(openId)
}

// 获取用户信息（需scope为 snsapi_userinfo）
func GetUserInfo(openId string)(*oauth.UserInfo, error){
	token := getToken(openId)
	if token == nil{
		return nil, errors.New("token of openid " + openId + "does not exist")
	}
	userInfo, err := wxoauth.GetUserInfo(token.AccessToken, openId)
	return &userInfo, err
}