package wechat

import (
	"errors"
	"fmt"
)

type wx_template_msg_res struct {
	Errcode int    `json:"errcode"`
	Errmsg  string `json:"errmsg"`
	msgid   int    `json:"msgid"`
}

func SendTemplateMessage(access_token string, touser, template_id, url string, data map[string]interface{}, client_msg_id, miniapp_appid, miniapp_pagepath string) (wx_template_msg_res, error) {

	var res wx_template_msg_res

	if touser == "" {
		return res, errors.New("缺少用户openid")
	}
	if template_id == "" {
		return res, errors.New("缺少消息模板")
	}
	if access_token == "" {
		return res, errors.New("缺少access token")
	}
	api_url := fmt.Sprintf(MP_TEMPLATE_MESSAGE_API, access_token)

	msg := map[string]interface{}{
		"touser":      touser,
		"template_id": template_id,
		"url":         url,
		"data":        data,
	}

	if client_msg_id != "" {
		msg["client_msg_id"] = client_msg_id
	}

	if miniapp_appid != "" {
		msg["miniprogram"] = map[string]string{
			"appid":    miniapp_appid,
			"pagepath": miniapp_pagepath,
		}
	}

	msg_json, err := json.Marshal(msg)

	if err != nil {
		return res, err
	}

	data_byte, err := PostJson(api_url, msg_json)

	if err == nil {
		err = json.Unmarshal(data_byte, &res)
	}

	return res, err
}