package main

import (
	"fmt"
	"log"
	"net/http"
	"net/smtp"
	"time"
)

const host = "rodberrypi"

func main() {
	for {
		log.Println("Checking Fridge")
		if !endPointAlive() {
			log.Println("He Dead")
			sendMail()
		} else {
			log.Println("He Alive")
		}
		time.Sleep(3600 * time.Second)
	}
}

func endPointAlive() bool {
	res, err := http.Get("http://" + host + ":2122/heartbeat")
	if err != nil {
		log.Println(err)
		return false
	}

	if res.StatusCode != 200 {
		log.Println("Status Code ", res.StatusCode)
		return false
	} else {
		return true
	}
}

func sendMail() {
	// Sender data.
	from := "rodbiren@gmail.com"
	password := "Lovers8991"

	// Receiver email address.
	to := []string{"rcviren@gmail.com"}

	// smtp server configuration.
	smtpServer := smtpServer{host: "smtp.gmail.com", port: "587"}

	// Message.
	mime := "MIME-version: 1.0;\nContent-Type: text/plain; charset=\"UTF-8\";\n\n"
	subject := "Subject: " + "Garage Power is Out" + "!\n"
	message := []byte(subject + mime + "\n" + "Make Rob Fix It!")

	// Authentication.
	auth := smtp.PlainAuth("", from, password, smtpServer.host)

	// Sending email.
	err := smtp.SendMail(smtpServer.Address(), auth, from, to, message)
	if err != nil {
		fmt.Println(err)
		return
	}

	fmt.Println("Email Sent!")
}

// smtpServer data to smtp server.
type smtpServer struct {
	host string
	port string
}

// Address URI to smtp server.
func (s *smtpServer) Address() string {
	return s.host + ":" + s.port
}