package qyweixin

import (
	"encoding/json"
	"fmt"
	"github.com/gin-gonic/gin"
	log "github.com/sirupsen/logrus"
	"github.com/spf13/cast"
	"gitlab.batiao8.com/open/gosdk/util"
	"gitlab.batiao8.com/open/gosdk/wechat"
	"gitlab.batiao8.com/open/gosdk/wechat/cache"
	"gitlab.batiao8.com/open/gosdk/wechat/message"
	wutil "gitlab.batiao8.com/open/gosdk/wechat/util"
	"net/http"
	"strings"
	"time"
)

var (
	wechatCache cache.Cache = cache.NewMemory()
)

type AppConfig struct {
	Corpid string
	Secret string
	Agent  string
	Token  string
	AesKey string
	Replay func(message.MixMessage) *message.Reply
}

type App struct {
	tokenExpire int64
	token       string
	config      *AppConfig
}

type UserInfo struct {
	UserId   string
	RealName string
}

func NewApp(cfg *AppConfig) *App {
	return &App{
		config: cfg,
	}
}

func (q *App) GetToken() string {
	if time.Now().Unix() <= q.tokenExpire-600 {
		return q.token
	}
	q.refreshToken()
	return q.token
}

func (q *App) GetResult(rspBody []byte) (map[string]interface{}, error) {
	result := make(map[string]interface{})
	if err := json.Unmarshal(rspBody, &result); err != nil {
		log.Errorf("result[%s] error :%s", string(rspBody), err.Error())
		return nil, err
	}
	if cast.ToInt(result["errcode"]) != 0 {
		log.Errorf("result[%s] error ", string(rspBody))
		return nil, fmt.Errorf("%d:%s", cast.ToInt(result["errcode"]), cast.ToString(result["errmsg"]))
	}
	return result, nil
}

func (q *App) GetUserInfo(userid string) (*UserInfo, error) {
	if err := q.refreshToken(); err != nil {
		return nil, err
	}
	reqUrl := fmt.Sprintf("https://qyapi.weixin.qq.com/cgi-bin/user/get?access_token=%s&userid=%s", q.GetToken(), userid)
	rspBody, err := util.HttpGet(reqUrl, nil)
	if err != nil {
		log.Errorf("httpPost url[%s] error :%s", reqUrl, err.Error())
		return nil, err
	}
	result, err := q.GetResult(rspBody)
	if err != nil {
		return nil, err
	}

	userInfo := new(UserInfo)
	userInfo.UserId = userid
	userInfo.RealName = cast.ToString(result["name"])

	return userInfo, nil
}

func (q *App) GetDepartmentUserid(departmentId int) ([]string, error) {
	if err := q.refreshToken(); err != nil {
		return nil, err
	}
	reqUrl := fmt.Sprintf("https://qyapi.weixin.qq.com/cgi-bin/user/list?access_token=%s&department_id=%d", q.GetToken(), departmentId)
	rspBody, err := util.HttpGet(reqUrl, nil)
	if err != nil {
		log.Errorf("httpPost url[%s] error :%s", reqUrl, err.Error())
		return nil, err
	}
	result, err := q.GetResult(rspBody)
	if err != nil {
		return nil, err
	}

	userids := make([]string, 0)
	userlist := cast.ToSlice(result["userlist"])
	for _, u := range userlist {
		user := cast.ToStringMap(u)
		userids = append(userids, cast.ToString(user["userid"]))
	}
	return userids, nil
}

func (q *App) Callback(ctx *gin.Context) {

	//配置微信参数
	wechatConfig := &wechat.Config{
		AppID:          q.config.Corpid,
		AppSecret:      q.config.Secret,
		Token:          q.config.Token,
		EncodingAESKey: q.config.AesKey,
		Cache:          wechatCache,
	}

	// 首次配置
	if strings.ToUpper(ctx.Request.Method) == http.MethodGet {
		sign := wutil.Signature(ctx.Query("timestamp"), ctx.Query("echostr"),
			ctx.Query("nonce"), wechatConfig.Token)
		if sign != ctx.Query("msg_signature") {
			log.Errorf("sign error forcheck config")
			return
		}

		_, resp, err := wutil.DecryptMsg(wechatConfig.AppID, ctx.Query("echostr"), wechatConfig.EncodingAESKey)
		if err != nil {
			log.Errorf("DecryptMsg failed! error:%s", err.Error())
			return
		}
		ctx.Data(http.StatusOK, "Content-type: text/plain", resp)
		return
	}

	// 2.响应消息
	wc := wechat.NewWechat(wechatConfig)
	ctx.Request.URL.RawQuery += "&encrypt_type=aes"
	server := wc.GetServer(ctx.Request, ctx.Writer)

	server.SetMessageHandler(q.config.Replay)

	server.SetDebug(true)
	err := server.Serve()
	if err != nil {
		log.Errorf("qiye weixin Service err:%s", err.Error())
		return
	}
	err = server.Send()
	if err != nil {
		log.Errorf("qiye weixin Send err:%s", err.Error())
		return
	}
}

func (q *App) refreshToken() error {
	if time.Now().Unix() <= q.tokenExpire-600 {
		return nil
	}

	reqUrl := fmt.Sprintf("https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid=%s&corpsecret=%s", q.config.Corpid, q.config.Secret)
	rspBody, err := util.HttpGet(reqUrl, nil)
	if err != nil {

		return err
	}
	result, err := q.GetResult(rspBody)
	if err != nil {
		return err
	}

	q.token = cast.ToString(result["access_token"])
	q.tokenExpire = time.Now().Unix() + cast.ToInt64(result["expires_in"])
	return nil
}