<?php
include "Functions.php";

if (array_key_exists('login_submit', $_POST)) { //check for form submission
    $filepath = "./user_data.dat";
    $Master_user_array = arrayfile_to_array($filepath); //set array file to variable

    if (array_key_exists(strtolower($_POST['log_username']), $Master_user_array)) { //checking if login username value = key value in array

        if ($_POST['log_password'] == $Master_user_array[strtolower($_POST['log_username'])]['password']) { //checking if password matches inputted username
            echo "{$_POST['log_username']} logged in."; //posting inputted user log in success & printing invoice table

$invoice='Invoice.dat';
//calling array form file
$user_quantity=arrayfile_to_array($invoice);
$inventory='Inventory.dat';
$allproducts= arrayfile_to_array($inventory);

echo "<h1>".'Thank you ';
echo $_POST['log_username'];
echo ', for your order!';
echo  "</h1>";
    echo "<table border=1 cellpadding=3><tr><th colspan=4>Invoice</th></tr>";
    echo "<tr><th>Item</th><th>Unit Price</th><th>Quantity</th><th>Extended Price</th></tr>";


    // Now print the invoice, one row at a time
    for ($x = 0; $x < count($allproducts); $x++)
    {
        if ($user_quantity[quantity.$x] != '0'){
            echo "<tr>";
            echo "<td>" . $allproducts[$x]['Name'] . "</td>";
            echo "<td align=right>" ;
            printf ("$%.2f", $allproducts[$x]['Price']);
            echo "</td>";
            echo "<td align=right>" . $user_quantity['quantity'.$x] . "</td>";
            $extended = $user_quantity['quantity'.$x] * $allproducts[$x]['Price'];
            echo "<td align=right>" ;
            printf ("$%.2f", $extended);
            echo "</td>";
            echo "</tr>";
            $total_Ordered += $extended;
        }

    }
    echo "<tr><td>Total</td> ";
    echo "<td colspan=3 align=right>";
    printf ("$%.2f", $total_Ordered);
    echo "</td></tr>";
    echo "<tr><td>Tax 5.75</td> ";
    $tax_Total=.0575*$total_Ordered;
    echo "<td colspan=3 align=right>";
    printf ("$%.2f", $tax_Total);
    echo "</td></tr>";
    echo "<tr><td>Shipping</td> ";
    $shipping=5;
    echo "<td colspan=3 align=right>";
    printf ("$%.2f", $shipping);
    echo "</td></tr>";
    echo "<tr><td><b>Grand Total</td> ";
    echo "<td colspan=3 align=right>";
    $grand_Total=$total_Ordered+$tax_Total+$shipping;
    printf ("$%.2f", $grand_Total);
    echo "</td></tr>";
    echo "</table>";


            die; //to not print rest of the code
        } else {
            echo 'wrong password, try again'; //wrong validation error output
        }
    }
    else {
        print "User {$_POST['username']} not found. <br>"; //wrong validation error output
    }
}

if (array_key_exists('create_new_user', $_POST)) { //referring to user creation page if user clicks button
    header("Location: Create_New_User.php");
    exit;

}
?>
<form action = '<?php echo $_SERVER['PHP_SELF'] ?>' method= 'post'>
    Username: <br>
    <INPUT TYPE="TEXT"  name="log_username" value = "<?php if (isset($_POST['username'])) echo $_POST['username'] ?>"><br>
    Password: <br>
    <INPUT TYPE="password" name = 'log_password'><br><br>
    <INPUT TYPE="SUBMIT" name = 'login_submit' value="Login">
    <br>
    <INPUT TYPE="SUBMIT" name = 'create_new_user' value="Create New User">
</form>