package lib

import (
	"crypto/sha1"
	"encoding/hex"
	"errors"
	"fmt"
	"kefu/models"
	"kefu/tools"
	"sort"
)

type Wechat struct {
	AppId, AppSecret, Token, WechatVisitorTemplateId,
	WechatMessageTemplateId, WechatKefuTemplateId,
	WechatKefu, WechatHost, WorkWechatCorpid, WorkWechatSecret,
	WorkWechatAppSecret, WorkWechatAppAgentId, WorkWechatAppToken, WorkWechatAppEncodingAESKey,
	WechatMiniAppId, WechatMiniAppSecret, WechatMiniToken,
	WechatCustomerTemplateId string
}

//AppId,AppSecret,Token
func NewWechatLib(entId string) (*Wechat, error) {
	configs := models.FindEntConfigs(entId)
	wechat := &Wechat{}
	for _, config := range configs {
		if config.ConfKey == "WechatAppId" {
			wechat.AppId = config.ConfValue
		}
		if config.ConfKey == "WechatAppSecret" {
			wechat.AppSecret = config.ConfValue
		}
		if config.ConfKey == "WechatAppToken" {
			wechat.Token = config.ConfValue
		}
		if config.ConfKey == "WechatVisitorTemplateId" {
			wechat.WechatVisitorTemplateId = config.ConfValue
		}
		if config.ConfKey == "WechatKefuTemplateId" {
			wechat.WechatKefuTemplateId = config.ConfValue
		}
		if config.ConfKey == "WechatMessageTemplateId" {
			wechat.WechatMessageTemplateId = config.ConfValue
		}
		if config.ConfKey == "WechatHost" {
			wechat.WechatHost = config.ConfValue
		}
		if config.ConfKey == "WechatKefu" {
			wechat.WechatKefu = config.ConfValue
		}
		if config.ConfKey == "WorkWechatCorpid" {
			wechat.WorkWechatCorpid = config.ConfValue
		}
		if config.ConfKey == "WorkWechatSecret" {
			wechat.WorkWechatSecret = config.ConfValue
		}
		if config.ConfKey == "WorkWechatAppSecret" {
			wechat.WorkWechatAppSecret = config.ConfValue
		}
		if config.ConfKey == "WorkWechatAppAgentId" {
			wechat.WorkWechatAppAgentId = config.ConfValue
		}
		if config.ConfKey == "WorkWechatAppToken" {
			wechat.WorkWechatAppToken = config.ConfValue
		}
		if config.ConfKey == "WorkWechatAppEncodingAESKey" {
			wechat.WorkWechatAppEncodingAESKey = config.ConfValue
		}
		if config.ConfKey == "WechatMiniAppId" {
			wechat.WechatMiniAppId = config.ConfValue
		}
		if config.ConfKey == "WechatMiniAppSecret" {
			wechat.WechatMiniAppSecret = config.ConfValue
		}
		if config.ConfKey == "WechatMiniToken" {
			wechat.WechatMiniToken = config.ConfValue
		}
		if config.ConfKey == "WechatCustomerTemplateId" {
			wechat.WechatCustomerTemplateId = config.ConfValue
		}
	}

	return wechat, nil
}
func (this *Wechat) GetAccess() (string, error) {
	url := fmt.Sprintf("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=%s&secret=%s", this.AppId, this.AppSecret)
	tools.Get(url)
	return "", errors.New("获取access_token失败")
}
func (this *Wechat) CheckWechatSign(signature, timestamp, nonce, echostr string) (string, error) {
	token := this.Token
	//将token、timestamp、nonce三个参数进行字典序排序
	var tempArray = []string{token, timestamp, nonce}
	sort.Strings(tempArray)
	//将三个参数字符串拼接成一个字符串进行sha1加密
	var sha1String string = ""
	for _, v := range tempArray {
		sha1String += v
	}
	h := sha1.New()
	h.Write([]byte(sha1String))
	sha1String = hex.EncodeToString(h.Sum([]byte("")))
	//获得加密后的字符串可与signature对比
	if sha1String == signature {
		return echostr, nil
	}
	return "", errors.New("微信API验证失")
}