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<?php
//login.php

/**
 * Start the session.
 */
session_start();


include 'database.php';
$pdo = Database::connect();

//If the POST var "login" exists (our submit button), then we can
//assume that the user has submitted the login form.
if(isset($_POST['login'])){

    //Retrieve the field values from our login form.
    $username = !empty($_POST['username']) ? trim($_POST['username']) : null;
    $passwordAttempt = !empty($_POST['password']) ? trim($_POST['password']) : null;

    //Retrieve the user account information for the given username.
    $sql = "SELECT id, username, password FROM users WHERE username = :username";
    $stmt = $pdo->prepare($sql);

    //Bind value.
    $stmt->bindValue(':username', $username);

    //Execute.
    $stmt->execute();

    //Fetch row.
    $user = $stmt->fetch(PDO::FETCH_ASSOC);

    //If $row is FALSE.
    if($user === false){
        //Could not find a user with that username!
        //PS: You might want to handle this error in a more user-friendly manner!
        die('Incorrect username / password combination! Click <a href="login.php">here</a> to go back.');
    } else{
        //User account found. Check to see if the given password matches the
        //password hash that we stored in our users table.

        //Compare the passwords.
        $validPassword = password_verify($passwordAttempt, $user['password']);

        //If $validPassword is TRUE, the login has been successful.
        if($validPassword){

            //Provide the user with a login session.
            //$_SESSION['user_id'] = $user['id'];
	     $_SESSION['username'] = $user['username'];
            $_SESSION['logged_in'] = time();

            //Redirect to our protected page, which we called adminpage.php
            header('Location: adminpage.php');
            exit;

        } else{
            //$validPassword was FALSE. Passwords do not match.
            die('Incorrect username / password combination!');
        }
    }

}
 Database::disconnect();
?>
<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
		<link   href="css/bootstrap.min.css" rel="stylesheet">
        <title>Admin Login</title>
    </head>
    <body>
        <h1>Admin Login</h1>
        <form action="login.php" method="post">
            <label for="username">Username</label>
            <input type="text" id="username" name="username"><br>
            <label for="password">Password</label>
            <input type="password" id="password" name="password"><br>
            <input type="submit" name="login" value="Login">
        </form>
    </body>

	<body>
		<h2>If you are a customer click this button.<h2>
		<form action="customerpage.php" method="post">
		<input type="submit" name="" value="Customer Page">
		</form>
	</body>
</html>