<?php
$ValidAccess = 2010;
require_once("include/globals.php");


if (SessionActive() != 1 || ! UserLoggedIn()) {
   logExit("Session is not active\n");
   exit();
}

// CSRF token validation
include "include/ajax.csrfToken.php";


// Set default timezone
date_default_timezone_set("Canada/Pacific");
$now = date("Y-m-d H:i:s",time());

$return_data = array();
$sequence_flag = 'N';

$moduleName = "ajax.ApplyCredit.php";
// startLog($moduleName);

// Get parameters
extract($_REQUEST);


// Validate parameters


// Ensure numeric parameters are numeric
if (!is_numeric($payment_trx)) logExit("Payment TRX num is not numeric\n");
if (!is_numeric($trx_num)) logExit("Charge TRX num is not numeric\n");
if (!is_numeric($user_num)) logExit("User num is not numeric\n");
$payment_trx = intval($payment_trx);
$trx_num = intval($trx_num);
$user_num = intval($user_num);

$school_num = $school_record['record_num'];


// Error logging
writeLog("payment_trx: $payment_trx\n");
writeLog("trx_num: $trx_num\n");
writeLog("user_num: $user_num\n");


// Get unallocated payment entry
$query = "SELECT * FROM user_account_detail " .
         "WHERE school_num = $school_num " .
         "AND user_num = $user_num " .
         "AND posted_to_transaction = 0 " .
         "AND posted_amount > 0 " .
         "AND deleted != 'Y' " .
         "AND transaction_num = $payment_trx " .
         "ORDER BY record_num LIMIT 0,1";
writeLog("query: $query\n");
$results = db_query($query);
$row = db_fetch_assoc($results);
$unallocated_amount = $row['posted_amount'];
$unallocated_trx    = $row['transaction_num'];
$unallocated_rnum   = $row['record_num'];
writeLog("unallocated_amount: $unallocated_amount\n");
writeLog("unallocated_trx: $unallocated_trx\n");
writeLog("unallocated_rnum: $unallocated_rnum\n");


// Get payment transaction
$query = "SELECT * FROM user_account " .
         "WHERE school_num = $school_num " .
         "AND user_num = $user_num " .
         "AND record_num = $payment_trx";
writeLog("query: $query\n");
$results = db_query($query);
$row = db_fetch_assoc($results);
$transaction_type = $row['transaction_type'];
$payment_method = $row['payment_method'];
if ($transaction_type != 'Payment') $payment_method = $transaction_type;


// Get the transaction to post to
$query = "SELECT * FROM user_account " .
         "WHERE school_num = $school_num " .
         "AND user_num = $user_num " .
         "AND record_num = $trx_num";
writeLog("query: $query\n");
$results = db_query($query);
$row = db_fetch_assoc($results);
$transaction_amount = $row['transaction_amount'];
$amount_paid = $row['amount_paid'];
$transaction_type = $row['transaction_type'];
$order_num = $row['order_num'];

$owing = $transaction_amount - $amount_paid;

writeLog("transaction_amount: $transaction_amount\n");
writeLog("amount_paid: $amount_paid\n");
writeLog("owing: $owing\n");

$now = time();

if ($owing > $unallocated_amount) {
   // Update existing detail transaction
   $query = "UPDATE user_account_detail " .
            "SET posted_to_transaction = $trx_num, " .
               "entered_time = $now " .
            "WHERE school_num = $school_num " .
            "AND record_num = $unallocated_rnum";
   writeLog("query: $query\n");
   db_query($query);

   // Update user account transaction
   $query = "UPDATE user_account " .
            "SET amount_paid = amount_paid + $unallocated_amount " .
            "WHERE school_num = $school_num " .
            "AND record_num = $trx_num";
   writeLog("query: $query\n");
   db_query($query);

   // Update order header
   if ($transaction_type == 'Order' && $order_num > 0) {
      $today = date("Y-m-d",$now);
      $query = "UPDATE hotlunch_order_header " .
               "SET paid_date = '$today', " .
                  "payment_method = '$payment_method', " .
                  "amount_paid = amount_paid + $unallocated_amount " .
               "WHERE school_num = $school_num " .
               "AND record_num = $order_num";
      writeLog("query: $query\n");
      db_query($query);
   }

   $return_data["account_balance"] = 0;
}
else {
   // Update existing detail transaction
   $query = "UPDATE user_account_detail " .
            "SET posted_to_transaction = $trx_num, " .
               "posted_amount = $owing, " .
               "entered_time = $now " .
            "WHERE school_num = $school_num " .
            "AND record_num = $unallocated_rnum";
   writeLog("query: $query\n");
   db_query($query);

   // Save remaining balance
   $balance = $unallocated_amount - $owing;
   $query = "INSERT INTO user_account_detail (school_num,user_num,transaction_num,posted_to_transaction,posted_amount,posted_schedule,entered_time,deleted) " .
            "VALUES ($school_num, $user_num, $trx_num, 0, $balance, 0, $now, 'N')";

   // Close the transaction
   $query = "UPDATE user_account " .
            "SET amount_paid = amount_paid + $owing, " .
               "transaction_status = 'Closed' " .
            "WHERE school_num = $school_num " .
            "AND record_num = $trx_num";
   writeLog("query: $query\n");
   db_query($query);

   // Update order header
   if ($transaction_type == 'Order' && $order_num > 0) {
      $today = date("Y-m-d",$now);
      $query = "UPDATE hotlunch_order_header " .
               "SET paid_date = '$today', " .
                  "payment_method = '$payment_method', " .
                  "amount_paid = order_total, " .
                  "status = 'Paid' " .
               "WHERE school_num = $school_num " .
               "AND record_num = $order_num";
      writeLog("query: $query\n");
      db_query($query);
   }

   $return_data["account_balance"] = $balance;
}

writeLog("complete\n");
echo(json_encode($return_data));

?>