package sms

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
	"net/http"
	"net/url"
	"strconv"
	"strings"
)

type SmsGet struct {
	Username string
	Password string
}

func NewSmsGet(username, password string) *SmsGet {
	return &SmsGet{
		Username: username,
		Password: password,
	}
}

func (smsget *SmsGet) Send(mobile, msg string) (int, error) {
	qs := url.Values{}
	qs.Add("method", "1")
	qs.Add("username", smsget.Username)
	qs.Add("password", smsget.Password)
	qs.Add("sms_msg", url.QueryEscape(msg))

	resp, err := http.Get(fmt.Sprintf("https://sms-get2.com/api_send.php?%s", qs.Encode()))
	if err != nil {
		return 0, err
	}
	defer resp.Body.Close()

	bs, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		return 0, err
	}

	var res struct {
		Status bool   `json:"stats"`
		Code   int    `json:"error_code,string"`
		Msg    string `json:"error_msg"`
	}
	if err := json.Unmarshal(bs, &res); err != nil {
		return 0, ErrResponse
	}
	if !res.Status || res.Code != 0 {
		if res.Code == 9 {
			return 0, ErrNotEnoughCredit
		}
		return 0, ErrResponse
	}

	credit, err := strconv.Atoi(strings.Split(res.Msg, "|")[2])
	if err != nil {
		return 0, err
	}

	return credit, nil
}