package sms

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

type Every8D struct {
	Username string
	Password string
}

func NewSmsEvery8D(username, password string) *Every8D {
	return &Every8D{
		Username: username,
		Password: password,
	}
}

func (every8d *Every8D) Send(mobile, msg string) (int, error) {
	qs := url.Values{}
	qs.Add("UID", every8d.Username)
	qs.Add("PWD", every8d.Password)
	qs.Add("DEST", mobile)
	qs.Add("MSG", url.QueryEscape(msg))

	client := http.Client{Timeout: 2 * time.Second}
	resp, err := client.Get(fmt.Sprintf("https://oms.every8d.com/API21/HTTP/sendSMS.ashx?%s", qs.Encode()))
	if err != nil {
		return 0, err
	}

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

	data := strings.Split(string(bs), ",")
	if len(data) != 5 {
		return 0, ErrResponse
	}

	credit, err := strconv.ParseFloat(data[0], 64)
	if err != nil {
		return 0, err
	}

	if credit < 0 {
		return 0, ErrNotEnoughCredit
	}

	return int(credit), nil
}