<?php
//Import PHPMailer classes into the global namespace
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\SMTP;
use PHPMailer\PHPMailer\Exception;

require_once("./assets/php/phpmailer/Exception.php");
require_once("./assets/php/phpmailer/PHPMailer.php");
require_once("./assets/php/phpmailer/SMTP.php");

function send_email($to, $subject, $body, $alt_body, $to_first_name, $to_last_name)
{
    $config_array = json_decode(file_get_contents("config.json", true));

    if (!isset($alt_body)) {
        $alt_body = "";
    }

    try {
        //Create a new PHPMailer instance
        $mail = new PHPMailer;
        //Tell PHPMailer to use SMTP
        $mail->isSMTP();
        //Enable SMTP debugging
        // SMTP::DEBUG_OFF = off (for production use)
        // SMTP::DEBUG_CLIENT = client messages
        // SMTP::DEBUG_SERVER = client and server messages
        $mail->SMTPDebug = SMTP::DEBUG_OFF;
        //Set the hostname of the mail server
        $mail->Host = 'smtp.gmail.com';
        //Set the SMTP port number - 587 for authenticated TLS, a.k.a. RFC4409 SMTP submission
        $mail->Port = 587;
        //Set the encryption mechanism to use - STARTTLS or SMTPS
        $mail->SMTPSecure = PHPMailer::ENCRYPTION_STARTTLS;
        //Whether to use SMTP authentication
        $mail->SMTPAuth = true;
        //Username to use for SMTP authentication - use full email address for gmail
        $mail->Username =  $config_array->{"gmail_username"};
        //Password to use for SMTP authentication
        $mail->Password =  $config_array->{"gmail_password"};
        //Set who the message is to be sent from
        $mail->setFrom($config_array->{"gmail_username"}, 'Food Inventory');
        //Set an alternative reply-to address
        $mail->addAddress($to, $to_first_name . " " . $to_last_name);
        //Set the subject line
        $mail->Subject = $subject;
        $mail->Body = $body;
        //Replace the plain text body with one created manually
        $mail->AltBody = $alt_body;
        //send the message, check for errors
        return ($mail->send());
    } catch (Exception $e) {
        return false;
    }
}