package main

import (
	"bytes"
	"encoding/json"
	"errors"
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
	"qfw/util"
	"qfw/util/redis"
	"time"
)

const (
	RedisCode           = "wxtoken"
	MenuButtonTypeUrl   = "view"
	MenuButtonTypeClick = "click"
)

var post_url = "https://api.weixin.qq.com/cgi-bin/menu/create?access_token=%s"
var Config *config

type config struct {
	Appid     string
	Webdomain string
	Redis     string
}

// Custom Menu
type Menu struct {
	Buttons []MenuButton `json:"button,omitempty"`
}

type MenuButton struct {
	Name       string       `json:"name"`
	Type       string       `json:"type,omitempty"`
	Key        string       `json:"key,omitempty"`
	Url        string       `json:"url,omitempty"`
	MediaId    string       `json:"media_id,omitempty"`
	SubButtons []MenuButton `json:"sub_button,omitempty"`
}

type response struct {
	ErrorCode    int    `json:"errcode,omitempty"`
	ErrorMessage string `json:"errmsg,omitempty"`
}

//微信菜单数据
func WXMenu() Menu {
	urlstr := fmt.Sprintf("https://open.weixin.qq.com/connect/oauth2/authorize?appid=%s&redirect_uri=%s/wx/oauth/%s&response_type=code&scope=snsapi_base&state=1#wechat_redirect", Config.Appid, Config.Webdomain, "%s")
	log.Println("urlstr:", urlstr)
	menu := &Menu{make([]MenuButton, 3)}
	menu.Buttons[0].Name = "招标搜索"
	menu.Buttons[0].Type = MenuButtonTypeUrl
	menu.Buttons[0].Url = fmt.Sprintf(urlstr, "searchinfo")

	menu.Buttons[1].Name = "招标订阅"
	menu.Buttons[1].Type = MenuButtonTypeUrl
	menu.Buttons[1].Url = fmt.Sprintf(urlstr, "rssset")

	menu.Buttons[2].Name = "发现"
	menu.Buttons[2].SubButtons = make([]MenuButton, 5)

	menu.Buttons[2].SubButtons[0].Name = "\U0001F4BC百宝箱"
	menu.Buttons[2].SubButtons[0].Type = MenuButtonTypeUrl
	menu.Buttons[2].SubButtons[0].Url = fmt.Sprintf(urlstr, "treasurebox")

	menu.Buttons[2].SubButtons[1].Name = string(0x1f4d1) + "标书制作"
	menu.Buttons[2].SubButtons[1].Type = MenuButtonTypeUrl
	menu.Buttons[2].SubButtons[1].Url = fmt.Sprintf(urlstr, "bidedoc")

	menu.Buttons[2].SubButtons[2].Name = string(0x1F4DE) + "商务合作"
	menu.Buttons[2].SubButtons[2].Type = MenuButtonTypeClick
	menu.Buttons[2].SubButtons[2].Key = "BusinessCoop"

	menu.Buttons[2].SubButtons[3].Name = string(0x1f4ca) + "招标大数据"
	menu.Buttons[2].SubButtons[3].Type = MenuButtonTypeUrl
	menu.Buttons[2].SubButtons[3].Url = fmt.Sprintf(urlstr, "structed")

	menu.Buttons[2].SubButtons[4].Name = "\U0001F464我的"
	menu.Buttons[2].SubButtons[4].Type = MenuButtonTypeUrl
	menu.Buttons[2].SubButtons[4].Url = fmt.Sprintf(urlstr, "mymenu")
	return *menu
}

//
func init() {
	util.ReadConfig(&Config)
	redis.InitRedis(Config.Redis)
}

//
func main() {
	tokenKey := fmt.Sprintf("WxToken_%s", Config.Appid)
	ret, err := redis.GetNewBytes(RedisCode, tokenKey)
	if err == nil {
		if ret != nil {
			var res map[string]interface{}
			err := json.Unmarshal(*ret, &res)
			if err != nil {
				log.Println(Config.Appid, "从redis加载token出错", err)
			} else if res["access_token"] != nil {
				post_url = fmt.Sprintf(post_url, res["access_token"].(string))
				data, err := marshal(WXMenu())
				if err != nil {
					log.Println("序列化菜单内容异常")
				} else {
					_, err := CreateMenu(post_url, data)
					if err != nil {
						log.Println("err:", err)
					} else {
						log.Println("create wx menu success")
					}
				}
			}
		} else {
			log.Println("redis 读取 token有误...")
		}
	} else {
		log.Println("redis 读取信息有误...")
	}
	time.Sleep(time.Second)
}

//创建菜单
func CreateMenu(post_url string, data []byte) ([]byte, error) {
	// log.Println(string(data))
	r, err := http.Post(post_url, "application/json; charset=utf-8", bytes.NewReader(data))
	if err != nil {
		return nil, err
	}
	defer r.Body.Close()
	reply, err := ioutil.ReadAll(r.Body)
	if err != nil {
		return nil, err
	}
	var result response
	if err := json.Unmarshal(reply, &result); err != nil {
		return nil, err
	}
	switch result.ErrorCode {
	case 0:
		return reply, nil
	case 42001, 40001:
		log.Println("reget the tocken by ", result.ErrorCode, result.ErrorMessage)
	default:
		return nil, errors.New(fmt.Sprintf("WeiXin send post request reply[%d]: %s", result.ErrorCode, result.ErrorMessage))
	}
	return nil, errors.New("WeiXin post request error")
}

func marshal(v interface{}) ([]byte, error) {
	data, err := json.Marshal(v)
	if err == nil {
		data = bytes.Replace(data, []byte("\\u003c"), []byte("<"), -1)
		data = bytes.Replace(data, []byte("\\u003e"), []byte(">"), -1)
		data = bytes.Replace(data, []byte("\\u0026"), []byte("&"), -1)
	}
	return data, err
}