<?php
/**********************************************************************
    Copyright (C) FrontAccounting, LLC.
	Released under the terms of the GNU General Public License, GPL, 
	as published by the Free Software Foundation, either version 3 
	of the License, or (at your option) any later version.
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
    See the License here <http://www.gnu.org/licenses/gpl-3.0.html>.
***********************************************************************/
include_once($path_to_root . "/purchasing/includes/db/invoice_items_db.inc");
include_once($path_to_root . "/admin/db/attachments_db.inc");

//--------------------------------------------------------------------------------------------------

function read_supplier_details_to_trans(&$supp_trans, $supplier_id)
{
	$sql = "SELECT supp.supp_name, terms.terms, terms.days_before_due,
		terms.day_in_following_month, supp.tax_included,
		supp.tax_group_id, tax_group.name AS tax_group_name,
		supp.credit_limit - Sum(IFNULL(IF(trans.type=".ST_SUPPCREDIT.", -1, 1) 
			* (ov_amount + ov_gst + ov_discount),0)) as cur_credit
		FROM ".TB_PREF."suppliers supp LEFT JOIN "
			.TB_PREF."supp_trans trans ON supp.supplier_id = trans.supplier_id, "
			.TB_PREF."payment_terms terms, "
			.TB_PREF."tax_groups tax_group
		WHERE supp.tax_group_id = tax_group.id
		AND supp.payment_terms=terms.terms_indicator
		AND supp.supplier_id = ".db_escape($supplier_id)." GROUP BY supp.supp_name";

	$result = db_query($sql, "The supplier record selected: " . $supplier_id . " cannot be retrieved");

	$myrow = db_fetch($result);

    if ($supp_trans->tran_date == "")
    {
		$supp_trans->tran_date = Today();

		if (!is_date_in_fiscalyear($supp_trans->tran_date))
			$supp_trans->tran_date = end_fiscalyear();
	}
	if ($supp_trans->supplier_id != $supplier_id)
	    get_duedate_from_terms($supp_trans);

    $supp_trans->supplier_id = $supplier_id;
    $supp_trans->tax_included = $myrow['tax_included'];
    $supp_trans->supplier_name = $myrow['supp_name'];
	$supp_trans->terms = array( 
		'description' => $myrow['terms'],
		'days_before_due' => $myrow['days_before_due'], 
		'day_in_following_month' => $myrow['day_in_following_month'] );

	$supp_trans->credit = $myrow['cur_credit'];

	$supp_trans->tax_description = $myrow['tax_group_name'];
	$supp_trans->tax_group_id = $myrow['tax_group_id'];

}

//-------------------------------------------------------------------------------------------------
//	Updates invoiced quantity in PO and GRN line, and act_price in PO
//  Returns:
// if chg_price is set:	 previous act_price, delivery date and unit_price from PO
//
function update_supp_received_items_for_invoice($id, $po_detail_item, $qty_invoiced, $chg_price=null)
{
	if ($chg_price != null)
	{
		$sql = "SELECT act_price, unit_price FROM ".TB_PREF."purch_order_details WHERE
			po_detail_item = ".db_escape($po_detail_item);
		$result = db_query($sql, "The old actual price of the purchase order line could not be retrieved");
		$row = db_fetch_row($result);
		$ret = $row[0];

		$unit_price = $row[1]; //Added by Rasmus

		$sql = "SELECT delivery_date FROM ".TB_PREF."grn_batch,".TB_PREF."grn_items WHERE
			".TB_PREF."grn_batch.id = ".TB_PREF."grn_items.grn_batch_id AND "
			.TB_PREF."grn_items.id=".db_escape($id);
		$result = db_query($sql, "The old delivery date from the received record cout not be retrieved");
		$row = db_fetch_row($result);
		$date = $row[0];
	}
	else
	{
		$ret = 0;
		$date = "";
		$unit_price = 0; // Added by Rasmus
	}
    $sql = "UPDATE ".TB_PREF."purch_order_details
		SET qty_invoiced = qty_invoiced + ".db_escape($qty_invoiced);

	if ($chg_price != null)
		$sql .= " , act_price = ".db_escape($chg_price);

	$sql .= " WHERE po_detail_item = ".db_escape($po_detail_item);
    db_query($sql, "The quantity invoiced of the purchase order line could not be updated");

    $sql = "UPDATE ".TB_PREF."grn_items
        SET quantity_inv = quantity_inv + ".db_escape($qty_invoiced)."
        WHERE id = ".db_escape($id);
	db_query($sql, "The quantity invoiced off the items received record could not be updated");
	return array($ret, $date, $unit_price);
}

function get_diff_in_home_currency($supplier, $old_date, $date, $amount1, $amount2)
{
	$dec = user_price_dec();
	price_decimal_format($amount2, $dec);
	$currency = get_supplier_currency($supplier);
	$ex_rate = get_exchange_rate_to_home_currency($currency, $old_date);
	$amount1 = $amount1 / $ex_rate;
	$ex_rate = get_exchange_rate_to_home_currency($currency, $date);
	$amount2 = $amount2 / $ex_rate;
	$diff = $amount2 - $amount1;
	//return round2($diff, $dec);
	return $diff;
}
//----------------------------------------------------------------------------------------

function add_supp_invoice(&$supp_trans)
{
	global $Refs;

	//$company_currency = get_company_currency();
	$trans_no = $supp_trans->trans_no;
	$trans_type = $supp_trans->trans_type;
	$supplier = get_supplier($supp_trans->supplier_id);

	begin_transaction();
	hook_db_prewrite($supp_trans, $trans_type);
	$tax_total = 0;
    $taxes = $supp_trans->get_taxes($supp_trans->tax_group_id);
	if ($trans_no) {
		$allocs = get_payments_for($trans_no, $trans_type); // save allocations
		void_transaction($trans_type, $trans_no, Today(), _("Document reentered."));
		$Refs->restore_last($trans_type, $trans_no);
	} else
		$allocs = get_po_prepayments($supp_trans);

	add_new_exchange_rate($supplier['curr_code'], $supp_trans->tran_date, $supp_trans->ex_rate);

    foreach ($taxes as $n => $taxitem)
    {
		$taxes[$n]['Value'] =  round2($taxitem['Value'], user_price_dec());
    	$tax_total += $taxes[$n]['Value'];
    }

	$invoice_items_total = $supp_trans->get_items_total();

	$item_added_tax = 0;
    if (!$supp_trans->tax_included)
    {
	    $taxes = $supp_trans->get_taxes($supp_trans->tax_group_id);
	    foreach ($taxes as $n => $taxitem)
			$item_added_tax += isset($taxitem['Override']) ? $taxitem['Override'] : round2($taxitem['Value'], user_price_dec());
	}

	if ($trans_type == ST_SUPPCREDIT)
	{
		// let's negate everything because it's a credit note
		$invoice_items_total = -$invoice_items_total;
		$tax_total = -$tax_total;
		$supp_trans->ov_discount = -$supp_trans->ov_discount; // this isn't used at all...
		$item_added_tax = -$item_added_tax;
	}

    $date_ = $supp_trans->tran_date;
	$ex_rate = get_exchange_rate_from_home_currency($supplier['curr_code'], $date_);

    /*First insert the invoice into the supp_trans table*/
	$invoice_id = write_supp_trans($trans_type, 0, $supp_trans->supplier_id, $date_, $supp_trans->due_date,
		$supp_trans->reference, $supp_trans->supp_reference,
		$invoice_items_total, $item_added_tax, $supp_trans->ov_discount, "", 0, $supp_trans->tax_included);

	if ($trans_no)
		move_trans_attachments($trans_type, $trans_no, $invoice_id);

	$supp_trans->trans_no = $invoice_id;

	$total = 0;

    /* Now the TAX account */
    $taxes = $supp_trans->get_taxes($supp_trans->tax_group_id, 0, false);
	$net_diff = 0;

    foreach ($taxes as $taxitem)
    {
		if ($taxitem['Net'] != 0)
		{
			if (isset($taxitem['Override'])) {
				if ($supp_trans->tax_included) { // if tax included, fix net amount to preserve overall line price
					$net_diff += $taxitem['Override'] - $taxitem['Value'];
					$taxitem['Net'] += $taxitem['Override'] - $taxitem['Value'];
				}
				$taxitem['Value'] = $taxitem['Override'];
			}
			add_trans_tax_details($trans_type, $invoice_id, 
				$taxitem['tax_type_id'], $taxitem['rate'], $supp_trans->tax_included, $taxitem['Value'],
				$taxitem['Net'], $ex_rate, $date_, $supp_trans->supp_reference, TR_INPUT);

			if (isset($taxitem['purchasing_gl_code']))
			{
				if ($trans_type == ST_SUPPCREDIT)
					$taxitem['Value'] = -$taxitem['Value'];
				$total += add_gl_trans_supplier($trans_type, $invoice_id, $date_,
					$taxitem['purchasing_gl_code'], 0, 0, $taxitem['Value'],
					$supp_trans->supplier_id,
					"A general ledger transaction for the tax amount could not be added");
			}
		}
    }
    if ($trans_type == ST_SUPPCREDIT)
		$net_diff = -$net_diff;

    /* Now the AP account */
    $total += add_gl_trans_supplier($trans_type, $invoice_id, $date_, $supplier["payable_account"], 0, 0,
		-($invoice_items_total +  $item_added_tax + $supp_trans->ov_discount),
		$supp_trans->supplier_id,
		"The general ledger transaction for the control total could not be added");

	$to_allocate = ($invoice_items_total + $item_added_tax + $supp_trans->ov_discount);

    foreach ($supp_trans->gl_codes as $entered_gl_code)
    {
	    /*GL Items are straight forward - just do the debit postings to the GL accounts specified -
	    the credit is to creditors control act  done later for the total invoice value + tax*/

		if ($trans_type == ST_SUPPCREDIT)
			$entered_gl_code->amount = -$entered_gl_code->amount;

		$memo_ = $entered_gl_code->memo_;
		$total += add_gl_trans_supplier($trans_type, $invoice_id, $date_, $entered_gl_code->gl_code,
			$entered_gl_code->gl_dim, $entered_gl_code->gl_dim2, $entered_gl_code->amount, $supp_trans->supplier_id, "", 0, $memo_);

		add_supp_invoice_gl_item($trans_type, $invoice_id, $entered_gl_code->gl_code, $entered_gl_code->amount, $memo_,
			$entered_gl_code->gl_dim, $entered_gl_code->gl_dim2);

		// store tax details if the gl account is a tax account
		if ($trans_type == ST_SUPPCREDIT)
			$entered_gl_code->amount = -$entered_gl_code->amount;
		add_gl_tax_details($entered_gl_code->gl_code, 
			$trans_type, $invoice_id, $entered_gl_code->amount,
			$ex_rate, $date_, $supp_trans->supp_reference, $supp_trans->tax_included);
    }

    $clearing_act = get_company_pref('grn_clearing_act');
    foreach ($supp_trans->grn_items as $line_no => $entered_grn)
    {

    	if ($trans_type == ST_SUPPCREDIT)
    	{
			$entered_grn->this_quantity_inv = -$entered_grn->this_quantity_inv;
			set_grn_item_credited($entered_grn, $supp_trans->supplier_id, $invoice_id, $date_);
    	}

		// For tax included pricelist the net price is calculated down from tax_included price.
		// To avoid rounding errors we have to operate on line value instead of price
		// Additionally we have to take into account differences in net value
		// due to variations in tax calculations on supplier side. More over there is no direct relation between
		// taxes and sales accounts, so we add net_diff just to first posted net value. This is _ugly_hack_
		// which save us from rewriting whole routine, and works right only for small tax differences.

		$taxfree_line = get_tax_free_price_for_item($entered_grn->item_code, $entered_grn->this_quantity_inv * $entered_grn->chg_price, 
			  $supp_trans->tax_group_id, $supp_trans->tax_included) - $net_diff; $net_diff = 0;

		$line_tax = get_full_price_for_item($entered_grn->item_code,
			$entered_grn->this_quantity_inv * $entered_grn->chg_price, 0, $supp_trans->tax_included) - $taxfree_line;

		$stock_gl_code = get_stock_gl_code($entered_grn->item_code);

		$dim = !empty($supp_trans->dimension) ? $supp_trans->dimension :
			($supplier['dimension_id'] ? $supplier['dimension_id'] : $stock_gl_code['dimension_id']);
		$dim2 = !empty($supp_trans->dimension2) ? $supp_trans->dimension2 :
			($supplier['dimension2_id'] ? $supplier['dimension2_id'] : $stock_gl_code['dimension2_id']);
    	if ($trans_type == ST_SUPPCREDIT)
		{
			$iv_act = (is_inventory_item($entered_grn->item_code) ? $stock_gl_code["inventory_account"] : 
				($supplier["purchase_account"] ? $supplier["purchase_account"] : $stock_gl_code["cogs_account"]));
			$total += add_gl_trans_supplier($trans_type, $invoice_id, $date_, $iv_act,
				$dim, $dim2, $taxfree_line, $supp_trans->supplier_id);
		}
    	else
    	{
    		// -------------- if price changed since po received.
			$iv_act = is_inventory_item($entered_grn->item_code) ? ($clearing_act ? $clearing_act : $stock_gl_code["inventory_account"]) : 
				($supplier["purchase_account"] ? $supplier["purchase_account"] : $stock_gl_code["cogs_account"]);
    		$old = update_supp_received_items_for_invoice($entered_grn->id, $entered_grn->po_detail_item,
    			$entered_grn->this_quantity_inv, $entered_grn->chg_price);

			// Since the standard cost is always calculated on basis of the po unit_price,
			// this is also the price that should be the base of calculating the price diff.
			// In cases where there is two different po invoices on the same delivery with different unit prices this will not work either

			$old_price = $old[2];

			$old_date = sql2date($old[1]);
			if (!is_inventory_item($entered_grn->item_code))
				$total += add_gl_trans_supplier($trans_type, $invoice_id, $date_, $iv_act,
					$dim, $dim2, $taxfree_line, $supp_trans->supplier_id);
			else
			{
				$ex_rate = get_exchange_rate_from_home_currency($supplier['curr_code'], $old_date);
				$old_value = get_tax_free_price_for_item($entered_grn->item_code, $entered_grn->this_quantity_inv * $old_price, 
					  $supp_trans->tax_group_id, $supp_trans->tax_included);

				$currency = get_supplier_currency($supp_trans->supplier_id);

				$total += add_gl_trans_supplier($trans_type, $invoice_id, $date_, $iv_act,
					$dim, $dim2, $old_value, $supp_trans->supplier_id, "", $ex_rate);
				$diff = get_diff_in_home_currency($supp_trans->supplier_id, $old_date, $date_, $old_value, 
					$taxfree_line);

				$mat_cost = update_average_material_cost(null, $entered_grn->item_code,
					$diff/$entered_grn->this_quantity_inv, $entered_grn->this_quantity_inv, null, true);

				//Add GL transaction for GRN Provision in case of difference
				if ($diff != 0)
				{
					$total += add_gl_trans($trans_type, $invoice_id, $date_, $stock_gl_code["inventory_account"],
						$dim, $dim2, 'GRN Provision', $diff, null, null, null,
						"The general ledger transaction could not be added for the GRN of the inventory item");

					//If QOH is 0 or negative then update_average_material_cost will be skipped
					//Thus difference in PO and Supp Invoice should be handled separately
					$qoh = get_qoh_on_date($entered_grn->item_code);
					if ($qoh <= 0)
					{
						global $Refs;

						$id = get_next_trans_no(ST_JOURNAL);
						$ref = $Refs->get_next(ST_JOURNAL, null, $date_);
						add_journal(ST_JOURNAL, $id, $diff, $date_, get_company_currency(), $ref);
						$stock_id = $entered_grn->item_code;
						$stock_gl_code = get_stock_gl_code($stock_id);
						$memo = _("Supplier invoice adjustment for zero inventory of ").$stock_id." "._("Invoice")." ".$supp_trans->reference;
						//Reverse the inventory effect if $qoh <=0
						add_gl_trans_std_cost(ST_JOURNAL, $id, $date_, 
							$stock_gl_code["inventory_account"],
							$dim, $dim2, $memo, -$diff);
						//GL Posting to inventory adjustment account
						add_gl_trans_std_cost(ST_JOURNAL, $id, $date_, 
							$stock_gl_code["adjustment_account"],
							$dim, $dim2, $memo, $diff);

						add_audit_trail(ST_JOURNAL, $id, $date_);
						add_comments(ST_JOURNAL, $id, $date_, $memo);
						$Refs->save(ST_JOURNAL, $id, $ref);
					}
				}
			}
			add_or_update_purchase_data($supp_trans->supplier_id, $entered_grn->item_code, $entered_grn->chg_price); 
		}

		add_supp_invoice_item($trans_type, $invoice_id, $entered_grn->item_code,
			$entered_grn->item_description, 0, 	$entered_grn->chg_price, $line_tax/$entered_grn->this_quantity_inv,
			$entered_grn->this_quantity_inv, $entered_grn->id, $entered_grn->po_detail_item, "");
    } /* end of GRN postings */

	/*Post a balance post if $total != 0 */
	add_gl_balance($trans_type, $invoice_id, $date_, -$total, PT_SUPPLIER, $supp_trans->supplier_id); // ??

	add_comments($trans_type, $invoice_id, $date_, $supp_trans->Comments);

	$Refs->save($trans_type, $invoice_id, $supp_trans->reference);

	if ($supp_trans->src_docs)
	{
		$invoice_alloc_balance = get_supp_trans_allocation_balance(ST_SUPPINVOICE, $supp_trans->src_docs);
		if ($invoice_alloc_balance > 0) 
		{ 	//the invoice is not already fully allocated 

			$trans = get_supp_trans($invoice_id, ST_SUPPCREDIT);
			$total = -$trans['Total'];

			$allocate_amount = ($invoice_alloc_balance > $total) ? $total : $invoice_alloc_balance;

			/*Now insert the allocation record if > 0 */
			if ($allocate_amount != 0) 
			{
				add_supp_allocation($allocate_amount, ST_SUPPCREDIT, $invoice_id, ST_SUPPINVOICE, $invoice_no,
					$supp_trans->supplier_id, $date_);
				update_supp_trans_allocation(ST_SUPPINVOICE, $invoice_no, $supp_trans->supplier_id);
				update_supp_trans_allocation(ST_SUPPCREDIT, $invoice_id, $supp_trans->supplier_id);

				exchange_variation(ST_SUPPCREDIT, $invoice_id, ST_SUPPINVOICE, $supp_trans->src_docs, $date_,
					$allocate_amount, PT_SUPPLIER);
			}
		}
	}

//_vd($allocs);
	reallocate_payments($invoice_id, ST_SUPPINVOICE, $date_, $to_allocate, $allocs);
//_vd(get_payments_for($sales_order, ST_PURCHORDER));
//_vd(get_payments_for($invoice_id, ST_SUPPINVOICE));
//exit;
	$supp_trans->trans_no = $invoice_id;
	hook_db_postwrite($supp_trans, $supp_trans->trans_type);
    commit_transaction();

    return $invoice_id;
}

//----------------------------------------------------------------------------------------

// get all the invoices/credits for a given PO - quite long route to get there !

function get_po_invoices_credits($po_number)
{
	$sql = "SELECT DISTINCT ".TB_PREF."supp_trans.trans_no, ".TB_PREF."supp_trans.type,
		ov_amount+ov_discount+ov_gst AS Total,
		".TB_PREF."supp_trans.tran_date
		FROM ".TB_PREF."supp_trans, ".TB_PREF."supp_invoice_items, "
		.TB_PREF."purch_order_details, ".TB_PREF."purch_orders
		WHERE ".TB_PREF."supp_invoice_items.supp_trans_no = ".TB_PREF."supp_trans.trans_no
		AND ".TB_PREF."supp_invoice_items.supp_trans_type = ".TB_PREF."supp_trans.type
		AND ".TB_PREF."supp_invoice_items.po_detail_item_id = ".TB_PREF."purch_order_details.po_detail_item
		AND ".TB_PREF."purch_orders.supplier_id = ".TB_PREF."supp_trans.supplier_id
		AND ".TB_PREF."purch_orders.order_no = ".TB_PREF."purch_order_details.order_no
		AND ".TB_PREF."purch_order_details.order_no = ".db_escape($po_number);

	return db_query($sql, "The invoices/credits for the po $po_number could not be retreived");
}

//----------------------------------------------------------------------------------------
//
// Retrieve tax ovverides from tax register.
//
function get_tax_overrides($trans_type, $trans_no)
{
	$tax_overrides = array();
	$sql = "SELECT amount, tax_type_id as id, rate
		FROM ".TB_PREF."trans_tax_details details
		WHERE trans_type=".db_escape($trans_type)." AND trans_no=".db_escape($trans_no)
		." AND amount>0"; // skip reposting of nondeductible VAT

	$result = db_query($sql, 'Cannot retrieve tax overrides');
	while($row = db_fetch($result))
	{
		$tax_overrides[$row['id']] = $row['amount'];
	}

	return $tax_overrides;
}
//----------------------------------------------------------------------------------------

function read_supp_invoice($trans_no, $trans_type, &$supp_trans)
{
	$sql = "SELECT ".TB_PREF."supp_trans.*, supp_name 
		FROM ".TB_PREF."supp_trans,".TB_PREF."suppliers
		WHERE trans_no = ".db_escape($trans_no)." AND type = ".db_escape($trans_type)."
		AND ".TB_PREF."suppliers.supplier_id=".TB_PREF."supp_trans.supplier_id";

	$result = db_query($sql, "Cannot retreive a supplier transaction");

	if (db_num_rows($result) == 1)
	{
		$trans_row = db_fetch($result);

		$supp_trans->supplier_id = $trans_row["supplier_id"];
		$supp_trans->supplier_name = $trans_row["supp_name"];
		$supp_trans->tran_date = sql2date($trans_row["tran_date"]);
		$supp_trans->due_date = sql2date($trans_row["due_date"]);
		$supp_trans->Comments = get_comments_string($trans_type, $trans_no);
		$supp_trans->reference = $trans_row["reference"];
		$supp_trans->supp_reference = $trans_row["supp_reference"];
		$supp_trans->ov_amount = $trans_row["ov_amount"];
		$supp_trans->ov_discount = $trans_row["ov_discount"];
		$supp_trans->ov_gst = $trans_row["ov_gst"];
		$supp_trans->tax_included = $trans_row["tax_included"];

		$id = $trans_row["trans_no"];

		$result = get_supp_invoice_items($trans_type, $id);

		if (db_num_rows($result) > 0)
		{

            while ($details_row = db_fetch($result))
            {

             	if ($details_row["gl_code"] == 0)
             	{
             		$supp_trans->add_grn_to_trans($details_row["grn_item_id"], $details_row["po_detail_item_id"], $details_row["stock_id"],
           				$details_row["description"], 
           				$details_row['qty_recd'],
           				$details_row['quantity_inv']-$details_row["quantity"],
           				$details_row["quantity"], 0, $details_row["FullUnitPrice"],
           				0, 0);
             	}
             	else
             	{
             		$supp_trans->add_gl_codes_to_trans($details_row["gl_code"], get_gl_account_name($details_row["gl_code"]), 0, 0,
           				$details_row["FullUnitPrice"], $details_row["memo_"], $details_row["dimension_id"], $details_row["dimension2_id"]);
             	}
            }
			$supp_trans->tax_overrides = get_tax_overrides($trans_type, $trans_no);
        }
        else
        {
			return display_db_error("Invalid supptrans details for supptrans number : $trans_no and type : $trans_type", $sql, true);
		}

	}
	else
	{
		return display_db_error("Invalid supptrans number : $trans_no and type : $trans_type", $sql, true);
	}
}

//----------------------------------------------------------------------------------------

function get_matching_invoice_item($stock_id, $po_item_id)
{
	$sql = "SELECT *, tran_date FROM ".TB_PREF."supp_invoice_items, ".TB_PREF."supp_trans
		WHERE supp_trans_type = ".ST_SUPPINVOICE." AND stock_id = "
		.db_escape($stock_id)." AND po_detail_item_id = ".db_escape($po_item_id)."
		AND supp_trans_no = trans_no";
	$result = db_query($sql, "Cannot retreive supplier transaction detail records");
	return db_fetch($result);  
}

function void_supp_invoice($type, $type_no)
{
	begin_transaction();

	hook_db_prevoid($type, $type_no);
	$trans = get_supp_trans($type_no, $type);

	void_bank_trans($type, $type_no, true);

	void_gl_trans($type, $type_no, true);

	void_supp_allocations($type, $type_no);

	void_supp_trans($type, $type_no);

	$result = get_supp_invoice_items($type, $type_no);

	// now remove this invoice/credit from any GRNs/POs that it's related to
	if (db_num_rows($result) > 0)
	{
		$date_ = Today();
        while ($details_row = db_fetch($result))
        {
         	if ((int)$details_row["grn_item_id"] > 0) // it can be empty for GL items
         	{
         		// Changed 2008-10-17 by Joe Hunt to get the avg. material cost updated
				$old = update_supp_received_items_for_invoice($details_row["grn_item_id"],
					$details_row["po_detail_item_id"], -$details_row["quantity"], $details_row["FullUnitPrice"]); 
				
				//$diff = $details_row["FullUnitPrice"] - $old[2];
				$old_date = sql2date($old[1]);
				
				$batch = get_grn_batch_from_item($details_row["grn_item_id"]);	
				$grn = get_grn_batch($batch);
         		if ($type == ST_SUPPCREDIT) // credit note 2009-06-14 Joe Hunt Must restore the po and grn
         		{	// We must get the corresponding invoice item to check for price chg.
					$match = get_matching_invoice_item($details_row["stock_id"], $details_row["po_detail_item_id"]);
					//Chaitanya : Skipped costing block & handle in void_stock_move
					// We must get the corresponding invoice item to check for price chg.
					/*if ($match !== false)
						$mat_cost = update_average_material_cost($grn["supplier_id"], $details_row["stock_id"],  
							$match["unit_price"], -$details_row["quantity"], sql2date($match['tran_date']), $match['tran_date'] !== $trans['tran_date']);
					else		
						$mat_cost = update_average_material_cost($grn["supplier_id"], $details_row["stock_id"],  
							$details_row["FullUnitPrice"], -$details_row["quantity"], $old_date, $old[1] !== $trans['tran_date']);*/

					$sql = "UPDATE ".TB_PREF."purch_order_details
        				SET quantity_ordered = quantity_ordered + ".-$details_row["quantity"].", ";
        			if ($match !== false)
        				$sql .= "act_price=".$match['unit_price'].", ";
    				$sql .= "quantity_received = quantity_received + ".-$details_row["quantity"]."
    				    WHERE po_detail_item = ".$details_row["po_detail_item_id"];
					db_query($sql, "a purchase order details record could not be updated. This receipt of goods has not been processed ");
					$sql = "UPDATE ".TB_PREF."grn_items SET qty_recd=qty_recd+".-$details_row["quantity"]."
						WHERE id=".$details_row["grn_item_id"];
					db_query($sql);
    			}
    			else
    			{
					$diff = get_diff_in_home_currency($grn["supplier_id"], $old_date, sql2date($trans['tran_date']), $old[2], 
						$details_row["FullUnitPrice"]);
					// Only adjust the avg for the diff
					$mat_cost = update_average_material_cost(null, $details_row["stock_id"],
						$diff, -$details_row["quantity"], $old_date, true);
						
					//Chaitanya : Reverse effect
					//If QOH is 0 or negative then update_average_material_cost will be skipped
					//Thus difference in PO and Supp Invoice should be handled separately
					
					$qoh = get_qoh_on_date($details_row["stock_id"]);
					if ($diff*$details_row["quantity"] !=0 && $qoh <= 0)
					{
						global $Refs;

						//Chaitanya : Post a journal entry
						$id = get_next_trans_no(ST_JOURNAL);
						$ref = $Refs->get_next(ST_JOURNAL);
						add_journal(ST_JOURNAL, $id, $details_row["quantity"] * $diff, $old_date, get_company_currency(), $ref);
						$stock_id = $details_row["stock_id"];
						$stock_gl_code = get_stock_gl_code($stock_id);
						$memo = "Reversing Supplier invoice adjustment for zero inventory of ".$stock_id." Invoice: ".$trans['reference'];
						//Reverse the inventory effect if $qoh <=0
						add_gl_trans_std_cost(ST_JOURNAL, $id, $old_date, 
							$stock_gl_code["inventory_account"],
							$dim, $dim2, $memo, $details_row["quantity"] * $diff);
						//GL Posting to inventory adjustment account
						add_gl_trans_std_cost(ST_JOURNAL, $id, $old_date, 
							$stock_gl_code["adjustment_account"],
							$dim, $dim2, $memo, -$details_row["quantity"] * $diff);
						
						add_audit_trail(ST_JOURNAL, $id, $old_date);
						add_comments(ST_JOURNAL, $id, $old_date, $memo);
						$Refs->save(ST_JOURNAL, $id, $ref);
					}
				}
         	}
        }
	}

	if ($type == ST_SUPPCREDIT) // void the credits in stock moves
		void_stock_move($type, $type_no); 
	void_supp_invoice_items($type, $type_no);
	void_trans_tax_details($type, $type_no);

	commit_transaction();
}

//----------------------------------------------------------------------------------------
function get_gl_account_info($acc)
{
	$sql = "SELECT account_code, account_name FROM ".TB_PREF."chart_master WHERE account_code=".db_escape($acc);
	return db_query($sql,"get account information");
}

function is_reference_already_there($supplier_id, $supp_reference, $trans_no=0)
{
	$sql = "SELECT COUNT(*) FROM ".TB_PREF."supp_trans WHERE supplier_id="
		.db_escape($supplier_id) . " AND supp_reference=" 
		.db_escape($supp_reference) 
		. " AND ov_amount!=0"; // ignore voided invoice references
	if ($trans_no)
		$sql .= " AND trans_no!=$trans_no";
	$result=db_query($sql,"The sql to check for the previous entry of the same invoice failed");

	$myrow = db_fetch_row($result);
	return $myrow[0] > 0;
}

function remove_not_invoice_item($id)
{
	begin_transaction();

    $myrow = get_grn_item_detail($id);

    $grn = get_grn_batch($myrow['grn_batch_id']);

    $supp = get_supplier($grn["supplier_id"]);

	$sql = "UPDATE ".TB_PREF."purch_order_details
		SET quantity_received = qty_invoiced, quantity_ordered = qty_invoiced WHERE po_detail_item = ".$myrow["po_detail_item"];
	db_query($sql, "The quantity invoiced of the purchase order line could not be updated");

    $sql = "UPDATE ".TB_PREF."grn_items
        SET qty_recd = quantity_inv WHERE id = ".$myrow["id"];
    db_query($sql, "The quantity invoiced off the items received record could not be updated");

    update_average_material_cost($grn["supplier_id"], $myrow["item_code"],
        $myrow["unit_price"], -$myrow["QtyOstdg"], Today());
        
    $price = $myrow['unit_price'];
    if ($supp['tax_included'])
        $price = get_tax_free_price_for_item($myrow['item_code'], $myrow['unit_price'], $supp['tax_group_id'], $supp['tax_included']);        

    add_stock_move(ST_SUPPRECEIVE, $myrow["item_code"], $myrow['grn_batch_id'], $grn['loc_code'], sql2date($grn["delivery_date"]), "",
        -$myrow["QtyOstdg"], $myrow['std_cost_unit'], $price);
        
    $clearing_act = get_company_pref('grn_clearing_act');
    if ($clearing_act) {    // otherwise GRN clearing account is not used
        if (is_inventory_item($myrow['item_code']))
        {
            $total = 0;
            $stock_gl_code = get_stock_gl_code($myrow['item_code']);
            $date = sql2date($grn["delivery_date"]);
            $total += add_gl_trans_supplier(ST_SUPPRECEIVE, $myrow['grn_batch_id'], $date, $stock_gl_code["inventory_account"],
                $stock_gl_code['dimension_id'], $stock_gl_code['dimension2_id'],
                -$myrow['QtyOstdg'] * $price, $grn["supplier_id"], "", 0, _("GRN Removal"));
            $total += add_gl_trans_supplier(ST_SUPPRECEIVE, $myrow['grn_batch_id'], $date, $clearing_act,
                0, 0, -$total, null, "", 0, _("GRN Removal"));
        }    
    }

    commit_transaction();
}

function find_src_invoices($cart)
{
	$invoices = $po_ids = array();
	foreach($cart->grn_items as $item)
		$po_ids[] = "'$item->po_detail_item'";	// credit item lines

	if (count($po_ids)) {
		$sql = "SELECT DISTINCT trans.trans_no, trans.reference, trans.supp_reference
			FROM ".TB_PREF."supp_invoice_items items
			LEFT JOIN ".TB_PREF."supp_trans trans ON trans.trans_no=items.supp_trans_no AND trans.`type`=items.supp_trans_type
			WHERE items.po_detail_item_id IN (" . implode(',', $po_ids). ")"." AND items.supp_trans_type=20";
		$result = db_query($sql, "cannot find source invoice details");
		while ($rec = db_fetch($result))
		{
			$invoices[$rec['trans_no']] = $rec['supp_reference']; // array($rec['reference'], $rec['supp_reference']);
		}
	}
	return $invoices;
}