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<?php
  include_once 'includes/config.php';
 
  /******************************************
   * Process GET variables
   **************************************************/
 
   /**
    * ADDED  V8.1 added a GET parameter to define the action
    * checkout.php should take
    */
   $action = isset($_GET['action']) ? $_GET['action'] : NULL;
 
   /**-----------------------------------------
    * Process GET vars for action='checkout'
    *----------------------------------------------*/
  /**
   * UPDATED V7.0: Create 'short forms' of GET variables
   *
   * Set short vars equal to NULL if they weren't set
   */
  $cart_items = isset($_GET['items_shopped']) ? $_GET['items_shopped'] : NULL;
 
  /*---------------------------------------------------
   * Process GET vars for cation='completeOrder'
   *-------------------------------------------------*/
 
  $cust_data   =  isset($_GET['customer']) ? $_GET['customer'] :  NULL;
  $order_total =  isset($_GET['order_total']) ? $_GET['order_total'] : NULL;
  /*********************************************************************
   * Perform any 'global' data processing
   *********************************************************************/
 
   //ADDED V8.0 booleab 'flag' to represent id error has occured
   $error = FALSE;
 
   //ADDED V8.0 Variable to hold custom error message
   $error_msg = '';
 
  if ($action == 'checkout'){
 
    if($cart_items != NULL) {
 
    /**
     * ADDED V8.0 perform input validation. Make sure at least onr
     * item has quantity >0
     */
     if (($cart_items['1001'] >0) or ($cart_items['2001'] > 0) or ($cart_items['3001'] > 0)) {
 
        /**
         * Calculate the shopping cart total by looking up the price
         * of each item in the item catalog and multiplying each item's
         * price by the quantity selected.
         *
         * The total is stored in the variable $curr_total, which will
         * be available for output in the page.
         */
 
        $curr_sub_total = 0.0 + ($item_catalog['1001']['price'] * $cart_items['1001'])
                              + ($item_catalog['2001']['price'] * $cart_items['2001'])
                              + ($item_catalog['3001']['price'] * $cart_items['3001']);
 
        $curr_total = $curr_sub_total + ($curr_sub_total * SALES_TAX_RATE);
        $curr_total = round($curr_total, 2);
 
        //define title for HTML <title> tag. Must be declared before HTML header is included
        $page_title = 'Checkout';
      }
      else {
        $error = TRUE;
 
        $error_msg = '<p> You must add at least one item to your' .
                  'cart before you can checkout.</p>';
        }
      }
    else {
      $error = TRUE;
    }
  }
  elseif ($action = 'comlete_order') {
    if (($cust_data != NULL) && ($order_total != NULL )) {
        if (!empty($cust_data['first_name']) && !empty($cust_data['last_name'])
            && !empty($cust_data['street']) && !empty($cust_data['city'])
            && !empty($cust_data['state']) && !empty($cust_data['zip'])) {
 
            //daefine title for the HTML <title> tag
            $page_title = 'Thenk You!';
        }
        else {
          $error  = TRUE;
 
          $error_msg  = '<p> You did not provide all of the necessary billing/shipping information.</p>';
 
        }
    }
    else{
        $error = TRUE;
    }
 
  }
  else {
    $error = TRUE;
    $page_title - 'Error';
    if ($error_msg == '') {
      $error_msg = '<p>You have reaxhed this page in error.</p>';
    }
  }
 
  /*************************************************************
   * Output HTML
   *************************************************************/
 
    //Include HTMLheader file
    include HTML_HEADER;
 
  if (!$error) {
    if ($action == 'checkout'){
?>
 
    <div class="title">Checkout</div>
 
    <!-- Output a message stating the cart's calculated total -->
    <p>
        Your shopping cart total is
        <b>$<?php echo $curr_total; ?></b>
         including taxes.
    </p>
 
    <p>
        Please enter your billing/shipping information to complete your order
    </p>
 
    <!--
        Create a form where a customer can enter their shipping/billing
        adress information
 
        Note: text input elements will be adding data to an associative array
        named 'customer' upon submission. This array will be accessible in thankyou.php
        via the $_GET array.
    -->
    <form action="checkout.php" method="get">
        <table id="shipping_table">
        <tr>
            <td>First Name:</td>
            <td><input type="text" name="customer[first_name]"  size="15" /></td>
        </tr>
        <tr>
            <td>Last Name:</td>
            <td><input type="text" name="customer[last_name]" size="15" /></td>
        </tr>
        <tr>
            <td>Street:</td>
            <td><input type="text" name="customer[st]"</td>
        </tr>
        <tr>
            <td>Apt. #:</td>
            <td><input type="text" name="customer[apt]" size="25" /></td>
        </tr>
        <tr>
            <td>City:</td>
            <td><input type="text" name="customer[city]" size="15" /></td>
        </tr>
        <tr>
            <td>State:</td>
            <td><input type="text" name="customer[state]" size="2" /></td>
        </tr>
        <tr>
            <td>Zip Code:</td>
            <td><input type="text" name="customer[zip]" size="10" /></td>
        </tr>
        <tr>
            <td colspan="2">
                <input type="hidden" name="action" value="complete_order"/>
                <input type="submit" value="Complete order."/>
            </td>
        </tr>
        </table>
 
        <!-- Addition of ahidden fiekd used ti 'forward' the
            claculated total on to the thank you page. -->
        <input type="hidden" name="order_total" value="<?php echo $curr_total;  ?>"/>
    </form>
 
<?php
    }
    elseif ($action = 'complete_order'){
 ?>
    <div class="title">
        Thank you!
    </div>
 
    <!-- output a message stating the customer's order total -->
 
    <p>
        Your order was completed on
 
        <!-- UODATED V6.2: added output of order creation date and time -->
        <?php echo '<em>' . date(ORDER_DATE_FORMAT) . '</em>'; ?>
 
        with a final total of
        <b>$<?php echo $order_total; ?></b> including
 
        <!-- UPDATED V6.2 added  message about sales tax rate -->
        <?php echo (SALES_TAX_RATE * 100) . '% '; ?> sales tax.
 
        It will be shipped to:
    </p>
 
    <!-- Output the billing/shipping information provided by the customer.
 
        Note: Curly brace, or 'complex', syntax is used within
        the double-quoted strings below in order to output
        associativaarray values
    -->
    <table id="thank_you_table">
    <tr>
        <td>
            <?php echo "{$cust_data['first_name']} {$cust_data['last_name']}"; ?>
        </td>
    </tr>
    <tr>
        <td>
            <?php echo "{$cust_data['st']}"; ?>
        </td>
    </tr>
    <tr>
        <td>
            Apt. #<?php echo "{$cust_data['apt']}"; ?>
        </td>
    </tr>
    <tr>
        <td>
            <?php
            //UPDATED V6.2: assures state abbreviation gets output capitalized
             echo "{$cust_data['city']}, "
                .  strtoupper($cust_data['state'])
                . " {$cust_data['zip']}"; ?>
        </td>
    </tr>
    </table>
<?php
    }
    else{
      echo $error_msg;
    }
    include HTML_FOOTER;
?>