<?php
//Declaring variables to prevent errors
$firstname = ""; //First name
$lastname = ""; //Last name
$email= ""; //email
$password = ""; //password
$confirmpassword= ""; //confirm password
$username= ""; //username
$address= ""; //address
$mobile= "";//mobile
$licence_key= "";
$specialist="";


$error_array = array(); //Holds error messages

if(isset($_POST['register_button'])){

    //Registration form values

    //First name
    $firstname = strip_tags($_POST['firstname']); //Remove html tags
    $firstname = str_replace(' ', '', $firstname); //remove spaces
    $firstname = ucfirst(strtolower($firstname)); //Uppercase first letter
    $_SESSION['firstname'] = $firstname; //Stores first name into session variable

    //Last name
    $lastname = strip_tags($_POST['lastname']); //Remove html tags
    $lastname = str_replace(' ', '', $lastname); //remove spaces
    $lastname = ucfirst(strtolower($lastname)); //Uppercase first letter
    $_SESSION['lastname'] = $lastname; //Stores last name into session variable

    //email
    $email = strip_tags($_POST['email']); //Remove html tags
    $email = str_replace(' ', '', $email); //remove spaces
    $email = ucfirst(strtolower($email)); //Uppercase first letter
    $_SESSION['email'] = $email; //Stores email into session variable


    //Password
    $password = strip_tags($_POST['password']); //Remove html tags
    $confirmpassword= strip_tags($_POST['confirmpassword']); //Remove html tags

    //Address
    $address = strip_tags($_POST['address']); //Remove html tags
    $address = str_replace(' ', '', $address); //remove spaces
    $address = ucfirst(strtolower($address)); //Uppercase first letter
    $_SESSION['address'] = $address; //Stores address into session variable

    //Mobile
    $mobile = strip_tags($_POST['mobile']); //Remove html tags
    $mobile = str_replace(' ', '', $mobile); //remove spaces
    $_SESSION['mobile'] = $mobile; //Stores first name into session variable


    //licence key
    $licence_key = strip_tags($_POST['licence_key']); //Remove html tags
    $licence_key = str_replace(' ', '', $licence_key); //remove spaces
    $_SESSION['licence_key'] = $licence_key; //Stores first name into session variable


    //Specilaist
    $specialist = strip_tags($_POST['specialist']); //Remove html tags
    $specialist = str_replace(' ', '', $specialist); //remove spaces
    $specialist = ucfirst(strtolower($specialist)); //Uppercase first letter
    $_SESSION['specialist'] = $specialist; //Stores first name into session variable


    //if($em == $em2) {
        //Check if email is in valid format
        //if(filter_var($em, FILTER_VALIDATE_EMAIL)) {

            //$em = filter_var($em, FILTER_VALIDATE_EMAIL);

            //Check if email already exists
            $email_check = mysqli_query($con, "SELECT email FROM users WHERE email='$email'");

            //Count the number of rows returned
            $num_rows = mysqli_num_rows($email_check);

            if($num_rows > 0) {
                array_push($error_array, "Email already in use<br>");
            }

        }
        else {
            array_push($error_array, "Invalid email format<br>");
        }


    }
    //else {
        //array_push($error_array, "Emails don't match<br>");
    }


    if(strlen($firstname) > 25 || strlen($firstname) < 2) {
        array_push($error_array, "Your first name must be between 2 and 25 characters<br>");
    }

    if(strlen($lastname) > 25 || strlen($lastname) < 2) {
        array_push($error_array,  "Your last name must be between 2 and 25 characters<br>");
    }

    if($password != $confirmpassword) {
        array_push($error_array,  "Your passwords do not match<br>");
    }
    else {
        if(preg_match('/[^A-Za-z0-9]/', $password)) {
            array_push($error_array, "Your password can only contain english characters or numbers<br>");
        }
    }

    if(strlen($password > 30 || strlen($password) < 5)) {
        array_push($error_array, "Your password must be betwen 5 and 30 characters<br>");
    }


    if(empty($error_array)) {
        $password = md5($password); //Encrypt password before sending to database

        //Generate username by concatenating first name and last name
        $username = strtolower($fname . "_" . $lname);
        $check_username_query = mysqli_query($con, "SELECT username FROM users WHERE username='$username'");


        $i = 0;
        //if username exists add number to username
        while(mysqli_num_rows($check_username_query) != 0) {
            $i++; //Add 1 to i
            $username = $username . "_" . $i;
            $check_username_query = mysqli_query($con, "SELECT username FROM users WHERE username='$username'");
        }

        //Profile picture assignment
        //$rand = rand(1, 2); //Random number between 1 and 2

        //if($rand == 1)
        //  $profile_pic = "assets/images/profile_pics/defaults/head_deep_blue.png";
        //else if($rand == 2)
            //$profile_pic = "assets/images/profile_pics/defaults/head_emerald.png";


        $query = mysqli_query($con, "INSERT INTO users VALUES ('', '$firstname', '$lastname', '$username', '$email', '$password',  '0', '0', 'no', ',')");

        array_push($error_array, "<span style='color: #14C800;'>You're all set! Goahead and login!</span><br>");

        //Clear session variables
        $_SESSION['firstname'] = "";
        $_SESSION['lastname'] = "";
        $_SESSION['email'] = "";
        $_SESSION['username'] = "";
        $_SESSION['address'] = "";
        $_SESSION['mobile'] = "";
        $_SESSION['licence_key'] = "";
        $_SESSION['specialist'] = "";

    }

}
?>