package service

import (
	"bytes"
	"encoding/json"
	"io/ioutil"
	"net/http"
	"strconv"
	"strings"
	"time"

	"wsc-go/utils"

	"github.com/astaxie/beego"
)

type SMSServiceError struct {
	Err string
}

func (e *SMSServiceError) Error() string {
	return e.Err
}

/* public */

// 发送验证码短信
func SMSSendVerificationCode(mobile string) error {
	if len(mobile) == 0 {
		return &SMSServiceError{Err: "手机号为空"}
	}
	if err := checkVerificationCodeSMSLimit(mobile); err != nil {
		return err
	}

	code_str := utils.RandomNumberString(6)
	templateID, _ := beego.AppConfig.Int("sms_verification_code_templateid")
	_, _, _, err := singleSendMessageUseUCPaas(templateID, []string{code_str}, mobile)
	if err == nil {
		redisClient := RedisClient()
		defer redisClient.Close()
		cur_date := time.Now().Format("2006-01-02")
		redisClient.Set("xt_modify_pwd_"+mobile, code_str, time.Minute*10)
		redisClient.Incr("xt_modify_pwd_" + mobile + "_" + cur_date).Result()
	}
	return err
}

// 成为机构管理员的邀请短信
func SMSSendInviteMobileToJoinOrgAdmin(name string, mobile string, password string) error {
	if len(mobile) == 0 {
		return &SMSServiceError{Err: "手机号为空"}
	}
	if len(password) == 0 {
		_, _, _, err := singleSendMessageUseUCPaas(332784, []string{name, mobile}, mobile)
		return err
	} else {
		_, _, _, err := singleSendMessageUseUCPaas(332783, []string{name, mobile, password}, mobile)
		return err
	}
}

/* private */

// 检查验证码短信请求限制
func checkVerificationCodeSMSLimit(mobile string) error {
	redisClient := RedisClient()
	defer redisClient.Close()

	cur_date := time.Now().Format("2006-01-02")
	moblie_count, _ := redisClient.Get("xt_modify_pwd_" + mobile + "_" + cur_date).Result()
	moblie_count_int, _ := strconv.Atoi(moblie_count)
	if moblie_max := 5; moblie_count_int >= moblie_max {
		return &SMSServiceError{Err: "当前手机号发送短信超过限制"}
	}

	return nil
}

/* 最底层的短信平台创建模板和发送短信的函数 */

// 获取短信平台信息
func getSMSConfig() (string, string, string) {
	return beego.AppConfig.String("sms_appId"),
		beego.AppConfig.String("sms_sid"),
		beego.AppConfig.String("sms_token")
}

// 用云之讯群发模板短信
// 返回值为发送了 n 条短信
func batchSendMessageUseUCPaas(templateID int, params []string, mobiles []string) (int, []interface{}, error) {
	sms_api := beego.AppConfig.String("sms_baseUrl") + "sendsms_batch"
	mobileStr := strings.Join(mobiles, ",")
	appID, sid, token := getSMSConfig()
	requestParams := make(map[string]interface{})
	requestParams["appid"] = appID
	requestParams["sid"] = sid
	requestParams["token"] = token
	requestParams["templateid"] = strconv.Itoa(templateID)
	requestParams["mobile"] = mobileStr
	if params != nil && len(params) != 0 {
		paramStr := strings.Join(params, ",")
		requestParams["param"] = paramStr
	}

	paramsBytes, _ := json.Marshal(requestParams)
	resp, requestErr := http.Post(sms_api, "application/json", bytes.NewBuffer(paramsBytes))

	if requestErr != nil {
		utils.ErrorLog("短信平台模板群发接口调用失败: %v", requestErr)
		return 0, nil, requestErr
	}
	defer resp.Body.Close()
	body, ioErr := ioutil.ReadAll(resp.Body)
	if ioErr != nil {
		utils.ErrorLog("短信平台模板群发接口返回数据读取失败: %v", ioErr)
		return 0, nil, ioErr
	}
	var respJSON map[string]interface{}
	utils.InfoLog(string(body))
	if err := json.Unmarshal([]byte(string(body)), &respJSON); err != nil {
		utils.ErrorLog("短信平台模板群发接口返回数据解析JSON失败: %v", err)
		return 0, nil, err
	}
	if respJSON["code"].(string) != "000000" {
		msg := respJSON["msg"].(string)
		utils.ErrorLog("短信平台模板群发接口请求失败: %v", msg)
		return 0, nil, &SMSServiceError{"短信平台模板群发接口请求失败"}

	} else {
		utils.SuccessLog("短信发送成功 report: %v", respJSON["report"])
		if len(mobiles) > 1 {
			count, _ := strconv.Atoi(respJSON["count_sum"].(string))
			return count, respJSON["report"].([]interface{}), nil
		} else {
			return 1, nil, nil
		}
	}
}

// 用云之讯单发模板短信
// 返回值分别是 是否成功，code，msg，error
func singleSendMessageUseUCPaas(templateID int, params []string, mobile string) (bool, string, string, error) {
	sms_api := beego.AppConfig.String("sms_baseUrl") + "sendsms"
	appID, sid, token := getSMSConfig()
	requestParams := make(map[string]interface{})
	requestParams["appid"] = appID
	requestParams["sid"] = sid
	requestParams["token"] = token
	requestParams["templateid"] = strconv.Itoa(templateID)
	requestParams["mobile"] = mobile
	if params != nil && len(params) != 0 {
		paramStr := strings.Join(params, ",")
		requestParams["param"] = paramStr
	}

	paramsBytes, _ := json.Marshal(requestParams)
	resp, requestErr := http.Post(sms_api, "application/json", bytes.NewBuffer(paramsBytes))

	if requestErr != nil {
		utils.ErrorLog("短信平台模板群发接口调用失败: %v", requestErr)
		return false, "", "", requestErr
	}
	defer resp.Body.Close()
	body, ioErr := ioutil.ReadAll(resp.Body)
	if ioErr != nil {
		utils.ErrorLog("短信平台模板群发接口返回数据读取失败: %v", ioErr)
		return false, "", "", ioErr
	}
	var respJSON map[string]interface{}
	utils.InfoLog(string(body))
	if err := json.Unmarshal([]byte(string(body)), &respJSON); err != nil {
		utils.ErrorLog("短信平台模板群发接口返回数据解析JSON失败: %v", err)
		return false, "", "", err
	}
	if respJSON["code"].(string) != "000000" {
		msg := respJSON["msg"].(string)
		utils.ErrorLog("短信平台模板群发接口请求失败: %v", msg)
		return false, "", "", &SMSServiceError{"短信平台模板群发接口请求失败"}

	} else {
		utils.SuccessLog("短信发送成功")
		return true, respJSON["code"].(string), respJSON["msg"].(string), nil
	}
}