<?php
	ob_start();
	session_start();
	include("connectdb.php");
	
	// it will never let you open index(login) page if session is set
	if (isset($_SESSION['user'])!="" ) {
		header("location: loyalty_buy");
		exit;
	}
	
	$error = false;
	
	if(isset($_POST['btn-login']) ) {	
		
		// prevent sql injections/ clear user invalid inputs
		$username = trim($_POST['username']);
		$username = strip_tags($username);
		$username = htmlspecialchars($username);
		
		$pass = trim($_POST['pass']);
		$pass = strip_tags($pass);
		$pass = htmlspecialchars($pass);
		// prevent sql injections / clear user invalid inputs
		
		if(empty($username)){
			$error = true;
			$usernameError = "Please enter your username.";
		} 
		
		if(empty($pass)){
			$error = true;
			$passError = "Please enter your password.";
		}
		
		// if there's no error, continue to login
		if (!$error) {
			
			$password = hash('sha256', $pass); // password hashing using SHA256
		
			$res = mysqli_query($con, "SELECT * FROM users WHERE username = '$username'");
			$row = mysqli_fetch_array($res);
			$count = mysqli_num_rows($res); // if username/pass correct it returns must be 1 row
			
			if($count == 1 && $row['password']== $password ) {
				$username = $row['userName'];
				$userid = $row['userId'];
				
				$_SESSION['user'] = $row['userId'];
				$_SESSION['username'] = $row['username'];
				header("Location: upload_product");
				}
			    else {
				$errMSG = "Incorrect Credentials, Try again...";
			}
				
		}
		
	}
?>

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <!-- Meta, title, CSS, favicons, etc. -->
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <title>Trustee Pharmacy Admin! | </title>

    <!-- Bootstrap -->
    <link href="../vendors/bootstrap/dist/css/bootstrap.min.css" rel="stylesheet">
    <!-- Font Awesome -->
    <link href="../vendors/font-awesome/css/font-awesome.min.css" rel="stylesheet">
    <!-- NProgress -->
    <link href="../vendors/nprogress/nprogress.css" rel="stylesheet">
    <!-- Animate.css -->
    <link href="../vendors/animate.css/animate.min.css" rel="stylesheet">

    <!-- Custom Theme Style -->
    <link href="../build/css/custom.min.css" rel="stylesheet">
  </head>

  <body class="login">
    <div>
      <a class="hiddenanchor" id="signup"></a>
      <a class="hiddenanchor" id="signin"></a>
      <div class="login_wrapper">
        <div class="animate form login_form">
          <section class="login_content">
            <form method="post" action="<?php echo htmlspecialchars($_SERVER['PHP_SELF']); ?>" autocomplete="off">
			    
				<?php
			if ( isset($errMSG) ) {
				
				?>
				<div class="form-group">
            	<div class="alert alert-danger">
				<span class="glyphicon glyphicon-info-sign"></span> <?php echo $errMSG; ?>
                </div>
            	</div>
                <?php
			}
			?>
			
              <h1>Login Form</h1>
              <div>
			    <span class="text-danger"><?php echo $emailError; ?></span>
                <input type="text" name="username" class="form-control" placeholder="Username" required="" />
              </div>
              <div>
			    <span class="text-danger"><?php echo $passError; ?></span>
                <input type="password" name="pass" class="form-control" placeholder="Pass" required="" />
              </div>
              <div>
                <button type="submit" class="btn btn-block btn-primary" name="btn-login">Sign Up</button>
                <a class="reset_pass" href="#">Lost your password?</a>
              </div>

              <div class="clearfix"></div>

              <div class="separator">
                <p class="change_link">New to site?
                  <a href="#signup" class="to_register"> Create Account </a>
                </p>

                <div class="clearfix"></div>
                <br />

                <div>
                  <h1><i class="fa fa-paw"></i> Trustee Pharmacy.</h1>
                  <p>©2017 All Rights Reserved. Trustee Pharmacy</p>
                </div>
              </div>
            </form>
          </section>
        </div>

        <div id="register" class="animate form registration_form">
          <section class="login_content">
            <form>
              <h1>Create Account</h1>
              <div>
                <input type="text" class="form-control" placeholder="Username" required="" />
              </div>
              <div>
                <input type="email" class="form-control" placeholder="Email" required="" />
              </div>
              <div>
                <input type="password" class="form-control" placeholder="Password" required="" />
              </div>
              <div>
                <a class="btn btn-default submit" href="index.html">Submit</a>
              </div>

              <div class="clearfix"></div>

              <div class="separator">
                <p class="change_link">Already a member ?
                  <a href="#signin" class="to_register"> Log in </a>
                </p>

                <div class="clearfix"></div>
                <br />

                <div>
                  <h1><i class="fa fa-paw"></i> Gentelella Alela!</h1>
                  <p>©2016 All Rights Reserved. Gentelella Alela! is a Bootstrap 3 template. Privacy and Terms</p>
                </div>
              </div>
            </form>
          </section>
        </div>
      </div>
    </div>
  </body>
</html>
