<?php

include ('../common/send_email.php');

// Connect to the database
include('../common/connect.php');

// Now we check if the data was submitted, isset() function will check if the data exists.
if (!isset($_POST['username'], $_POST['password'], $_POST['email'])) {
	// Could not get the data that should have been sent.
	exit('Please complete the registration form!');
}
// Make sure the submitted registration values are not empty.
if (empty($_POST['username']) || empty($_POST['password']) || empty($_POST['email'])) {
	// One or more values are empty.
	exit('Please complete the registration form');
}

// Now we check if the data was submitted, isset() function will check if the data exists.
if (!isset($_POST['username'], $_POST['password'], $_POST['email'])) {
	// Could not get the data that should have been sent.
	exit('Please complete the registration form!');
}
// Make sure the submitted registration values are not empty.
if (empty($_POST['username']) || empty($_POST['password']) || empty($_POST['email'])) {
	// One or more values are empty.
	exit('Please complete the registration form');
}

// Email validation
if (!filter_var($_POST['email'], FILTER_VALIDATE_EMAIL)) {
	exit('Email is not valid!');
}

// Invalid Characters Validation
if (preg_match('/^[a-zA-Z0-9]+$/', $_POST['username']) == 0) {
    exit('Username is not valid!');
}

// Character Length Check
if (strlen($_POST['password']) > 20 || strlen($_POST['password']) < 5) {
	exit('Password must be between 5 and 20 characters long!');
}

// Check if email is valid
if (!filter_var($_POST['email'], FILTER_VALIDATE_EMAIL)) {
	exit('Email is not valid!');
}

//Email validation
if (!filter_var($_POST['email'], FILTER_VALIDATE_EMAIL)) {
	exit('Email is not valid!');
}

// Invalid chars validation
if (preg_match('/^[a-zA-Z0-9]+$/', $_POST['username']) == 0) {
    exit('Username is not valid!');
}

// Character length check
if (strlen($_POST['password']) > 20 || strlen($_POST['password']) < 5) {
	exit('Password must be between 5 and 20 characters long!');
}

// We need to check if the account with that username exists.

if ($stmt = $con->prepare('SELECT id, password FROM administrator WHERE username = ?')) {
	// Bind parameters (s = string, i = int, b = blob, etc), hash the password using the PHP password_hash function.
	$stmt->bind_param('s', $_POST['username']);
	$stmt->execute();
	$stmt->store_result();
	// Store the result so we can check if the account exists in the database.
	if ($stmt->num_rows > 0) {
		// Username already exists
		echo 'Username exists, please choose another!';
	} else {
		// Insert new account
        // Username doesnt exists, insert new account
        if ($stmt = $con->prepare('INSERT INTO administrator (username, password, email, activation_code) VALUES (?, ?, ?, ?)')) {
            // We do not want to expose passwords in our database, so hash the password and use password_verify when a user logs in.
            $password = password_hash($_POST['password'], PASSWORD_DEFAULT);
            $uniqid = uniqid();
            $stmt->bind_param('ssss', $_POST['username'], $password, $_POST['email'], $uniqid);
			
            $stmt->execute();

			$activate_link = dirname($_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']) . 
			'/activate.php?email=' . $_POST['email'] . '&code=' . $uniqid;						
			$body = '<p>Please click the link below to activate the account of: ' . $_POST['email']. 
			'<br><br><a href="' . $activate_link . '">' . $activate_link . '</a></p>';

			sendEmail($EMAIL_HOST, $EMAIL_USERNAME, $EMAIL_PASS, $EMAIL_FROM, $_POST['email'], 'Account Activation Required', $body);
			sendEmail($EMAIL_HOST, $EMAIL_USERNAME, $EMAIL_PASS, $EMAIL_FROM, $EMAIL_ROOT, 'New admin account application', $body);

        } else {
            // Something is wrong with the sql statement, check to make sure accounts table exists with all 3 fields.
            echo 'Could not prepare statement!';
        } 
	}
	$stmt->close();
} else {
	// Something is wrong with the sql statement, check to make sure accounts table exists with all 3 fields.
	echo 'Could not prepare statement!';
}
$con->close();
?>