<?php
	include "db_config.php";
$conn = mysqli_connect($servername, $username, $password, $db);

//Allow Image Upload
$target_dir = "../images/";
if(empty($_FILES["fileToUpload"]["name"])) {
        $target_file_name = "";
	$target_file = "";
	$image_link = "";
} else {
	$target_file_name = preg_replace('/[^a-zA-Z0-9s.]/', '_', basename($_FILES["fileToUpload"]["name"]));
	$target_file = $target_dir . $target_file_name;
	$image_link = mysqli_real_escape_string($conn, "https://DOMAIN.com/bms/images/$target_file_name");
}
$uploadOk = 1;
$imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);
// Check if image file is a actual image or fake image
if(isset($_POST["submit"])) {
    $check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
    if($check !== false) {
        echo "File is an image - " . $check["mime"] . ".";
        $uploadOk = 1;
    } else {
        echo "File is not an image.";
        $uploadOk = 0;
    }
}
// Check if file already exists
if (file_exists($target_file)) {
    echo "Sorry, file already exists.";
    $uploadOk = 0;
}
// Check file size
if ($_FILES["fileToUpload"]["size"] > 500000) {
    echo "Sorry, your file is too large.";
    $uploadOk = 0;
}
// Allow certain file formats
if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
&& $imageFileType != "gif" ) {
    echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";
    $uploadOk = 0;
}
// Check if $uploadOk is set to 0 by an error
if ($uploadOk == 0) {
    echo "Sorry, your file was not uploaded.";
// if everything is ok, try to upload file
} else {
    if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
        echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
    } else {
        echo "Sorry, there was an error uploading your file.";
    }
}

//Set Variables
$event_id = mysqli_real_escape_string($conn, $_POST['event']);
$description = mysqli_real_escape_string($conn, $_POST['description']);
$is_ongoing = mysqli_real_escape_string($conn, $_POST['is_ongoing']);
$end_date_time = mysqli_real_escape_string($conn, $_POST['end_date_time']);
$user = mysqli_real_escape_string($conn, $_POST['user']);

//Get timestamp
$timestamp = new DateTime();
$update_date_time = date_format($timestamp, 'Y/m/d H:i');

//Insert event update into event updates table
$update_query = "INSERT INTO event_updates (update_desc, update_date_time, update_is_ongoing, end_date_time, event_id, update_user, update_image) VALUES ('$description', '$update_date_time', '$is_ongoing', '$end_date_time', '$event_id', '$user', '$image_link')";

//Update value of is_ongoing in main events table
$is_ongoing_endtime_query = "UPDATE events SET is_ongoing='$is_ongoing', date_time_end='$end_date_time' WHERE event_id='$event_id'";

//Set variables for email
//MySQL queries to get Unit Name and Alert
$unitname_query = "SELECT unit_name FROM units AS units INNER JOIN events AS events ON events.unit_id=units.unit_id WHERE events.event_id=".$_POST['event']."";
$unitname_query_run = mysqli_query($conn, $unitname_query);
$unitname_array = mysqli_fetch_assoc($unitname_query_run);
$unitname = $unitname_array['unit_name'];

$alertname_query = "SELECT alert_name FROM alerts AS alerts INNER JOIN events AS events ON events.alert_id=alerts.alert_id WHERE events.event_id=".$_POST['event']."";
$alertname_query_run = mysqli_query($conn, $alertname_query);
$alertname_array = mysqli_fetch_assoc($alertname_query_run);
$alertname = $alertname_array['alert_name'];

$start_date_time_query = "SELECT date_time_start FROM events WHERE event_id=".$_POST['event']."";
$start_date_time_query_run = mysqli_query($conn, $start_date_time_query);
$start_date_time_array = mysqli_fetch_assoc($start_date_time_query_run);
$start_date_time = $start_date_time_array['date_time_start'];

$description_for_email = nl2br($_POST['description']);
//If successful, redirect back to index.php and send email, else tell user that it failed.
$event_update = mysqli_query($conn, $is_ongoing_endtime_query);
$result = mysqli_query($conn, $update_query);
if($result){
        echo("Event added, redirecting...");
        sleep (2);
        header('Location: ../index.php');
        //Set Email Info
        $to = "TOEMAIL@DOMAIN.com";
        $subject = "Updated BMS Alert: ".$unitname." ".$alertname."";
	$headers = "MIME-Version: 1.0" . "\r\n";
	$headers .= "Content-type:text/html;charset=UTF-8" . "\r\n";
	$headers .= "From: FROMEMAIL@DOMAIN.com";
	$message = "
		<html>
		<body>
		BMS Unit: ".$unitname."
		<br />
		Type of Alert: ".$alertname."
		<br />
		Start Date / Time: ".$start_date_time."
		<br />
		End Date / Time: ".$end_date_time."
		<br />
		Description: ".$description_for_email."
		<br />
		Updated by: ".$user."
		<br />
		Image Link (if any): ".$image_link."
		<br />
		Event Link: https://DOMAIN.com/bms/viewevent.php?eventid=$event_id
		<br /><br />
		This message generated by https://DOMAIN.com/bms
		</body>
		</html>";
	//WordWrap the message
	$message_wrapped = wordwrap($message, 70, "\n", true);
	//Send the email
        mail($to,$subject,$message_wrapped,$headers);
} else{
        echo('Error! Please <a href="javascript:history.back()">go back</a> and try again');
}
        $conn->close();
?>