/***********************************************************************
 * This file is part of iDempiere ERP Open Source                      *
 * http://www.idempiere.org                                            *
 *                                                                     *
 * Copyright (C) Contributors                                          *
 *                                                                     *
 * This program is free software; you can redistribute it and/or       *
 * modify it under the terms of the GNU General Public License         *
 * as published by the Free Software Foundation; either version 2      *
 * 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        *
 * GNU General Public License for more details.                        *
 *                                                                     *
 * You should have received a copy of the GNU General Public License   *
 * along with this program; if not, write to the Free Software         *
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,          *
 * MA 02110-1301, USA.                                                 *
 **********************************************************************/
package org.compiere.model;

import java.io.File;
import java.math.BigDecimal;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Timestamp;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import java.util.logging.Level;

import org.adempiere.exceptions.AdempiereException;
import org.adempiere.exceptions.BackDateTrxNotAllowedException;
import org.adempiere.exceptions.PeriodClosedException;
import org.compiere.process.DocAction;
import org.compiere.process.DocumentEngine;
import org.compiere.util.AdempiereUserError;
import org.compiere.util.CLogger;
import org.compiere.util.DB;
import org.compiere.util.Env;
import org.compiere.util.TimeUtil;
import org.compiere.util.Util;

public class MProduction extends X_M_Production implements DocAction {
	/**
	 * generated serial id
	 */
	private static final long serialVersionUID = -1185737281702437745L;

	/** Log								*/
	protected static CLogger		m_log = CLogger.getCLogger (MProduction.class);
	protected int lineno;
	protected int count;

    /**
     * UUID based Constructor
     * @param ctx  Context
     * @param M_Production_UU  UUID key
     * @param trxName Transaction
     */
    public MProduction(Properties ctx, String M_Production_UU, String trxName) {
        super(ctx, M_Production_UU, trxName);
		if (Util.isEmpty(M_Production_UU))
			setInitialDefaults();
    }

    /**
     * @param ctx
     * @param M_Production_ID
     * @param trxName
     */
	public MProduction(Properties ctx, int M_Production_ID, String trxName) {
		this (ctx, M_Production_ID, trxName, (String[]) null);
	}

	/**
	 * @param ctx
	 * @param M_Production_ID
	 * @param trxName
	 * @param virtualColumns
	 */
	public MProduction(Properties ctx, int M_Production_ID, String trxName, String... virtualColumns) {
		super(ctx, M_Production_ID, trxName, virtualColumns);
		if (M_Production_ID == 0)
			setInitialDefaults();
	}

	/**
	 * Set the initial defaults for a new record
	 */
	private void setInitialDefaults() {
		setDocStatus(DOCSTATUS_Drafted);
		setDocAction (DOCACTION_Prepare);
	}

	/**
	 * @param ctx
	 * @param rs
	 * @param trxName
	 */
	public MProduction(Properties ctx, ResultSet rs, String trxName) {
		super(ctx, rs, trxName);
	}
	
	/**
	 * Create new production with client, organization and date promised (as movement date) from order line.
	 * @param line order line
	 */
	public MProduction( MOrderLine line ) {
		super( line.getCtx(), 0, line.get_TrxName());
		setAD_Client_ID(line.getAD_Client_ID());
		setAD_Org_ID(line.getAD_Org_ID());
		setMovementDate( line.getDatePromised() );
	}

	/**
	 * Create new production for project line
	 * @param line project line
	 */
	public MProduction( MProjectLine line ) {
		super( line.getCtx(), 0, line.get_TrxName());
		MProject project = new MProject(line.getCtx(), line.getC_Project_ID(), line.get_TrxName());
		MWarehouse wh = new MWarehouse(line.getCtx(), project.getM_Warehouse_ID(), line.get_TrxName());
		
		MLocator M_Locator = null;
		int M_Locator_ID = 0;

		if (wh != null)
		{
			M_Locator = wh.getDefaultLocator();
			M_Locator_ID = M_Locator.getM_Locator_ID();
		}
		setAD_Client_ID(line.getAD_Client_ID());
		setAD_Org_ID(line.getAD_Org_ID());
		setM_Product_ID(line.getM_Product_ID());
		setProductionQty(line.getPlannedQty());
		setM_Locator_ID(M_Locator_ID);
		setDescription(project.getValue()+"_"+project.getName()+" Line: "+line.getLine()+" (project)");
		setC_Project_ID(line.getC_Project_ID());
		setC_BPartner_ID(project.getC_BPartner_ID());
		setC_Campaign_ID(project.getC_Campaign_ID());
		setAD_OrgTrx_ID(project.getAD_OrgTrx_ID());
		setC_Activity_ID(project.getC_Activity_ID());
		setC_ProjectPhase_ID(line.getC_ProjectPhase_ID());
		setC_ProjectTask_ID(line.getC_ProjectTask_ID());
		setMovementDate( Env.getContextAsDate(p_ctx, Env.DATE));
	}

	@Override
	public String completeIt()
	{
		// Re-Check
		if (!m_justPrepared)
		{
			String status = prepareIt();
			m_justPrepared = false;
			if (!DocAction.STATUS_InProgress.equals(status))
				return status;
		}

		// Set the definite document number after completed (if needed)
		setDefiniteDocumentNo();

		m_processMsg = ModelValidationEngine.get().fireDocValidate(this, ModelValidator.TIMING_BEFORE_COMPLETE);
		if (m_processMsg != null)
			return DocAction.STATUS_Invalid;

		StringBuilder errors = new StringBuilder();
		int processed = 0;
			
		if (!isUseProductionPlan()) {
			MProductionLine[] lines = getLines();
			//IDEMPIERE-3107 Check if End Product in Production Lines exist
			if(!isHaveEndProduct(lines)) {
				m_processMsg = "Production does not contain End Product";
				return DocAction.STATUS_Invalid;
			}
			errors.append(processLines(lines));
			if (errors.length() > 0) {
				m_processMsg = errors.toString();
				return DocAction.STATUS_Invalid;
			}
			processed = processed + lines.length;
		} else {
			Query planQuery = new Query(Env.getCtx(), I_M_ProductionPlan.Table_Name, "M_ProductionPlan.M_Production_ID=?", get_TrxName());
			List<MProductionPlan> plans = planQuery.setParameters(getM_Production_ID()).list();
			for(MProductionPlan plan : plans) {
				MProductionLine[] lines = plan.getLines();
				
				//IDEMPIERE-3107 Check if End Product in Production Lines exist
				if(!isHaveEndProduct(lines)) {
					m_processMsg = String.format("Production plan (line %1$d id %2$d) does not contain End Product", plan.getLine(), plan.get_ID());
					return DocAction.STATUS_Invalid;
				}
				
				if (lines.length > 0) {
					errors.append(processLines(lines));
					if (errors.length() > 0) {
						m_processMsg = errors.toString();
						return DocAction.STATUS_Invalid;
					}
					processed = processed + lines.length;
				}
				plan.setProcessed(true);
				plan.saveEx();
			}
		}

		//		User Validation
		String valid = ModelValidationEngine.get().fireDocValidate(this, ModelValidator.TIMING_AFTER_COMPLETE);
		if (valid != null)
		{
			m_processMsg = valid;
			return DocAction.STATUS_Invalid;
		}

		setProcessed(true);
		setDocAction(DOCACTION_Close);
		return DocAction.STATUS_Completed;
	}

	/**
	 * 	Set the definite document number after completed
	 */
	protected void setDefiniteDocumentNo() {
		MDocType dt = MDocType.get(getCtx(), getC_DocType_ID());
		if (dt.isOverwriteDateOnComplete()) {
			if (this.getProcessedOn().signum() == 0) {
				setMovementDate(TimeUtil.getDay(0));
				MPeriod.testPeriodOpen(getCtx(), getMovementDate(), getC_DocType_ID(), getAD_Org_ID());
				MAcctSchema.testBackDateTrxAllowed(getCtx(), getMovementDate(), get_TrxName());
			}
		}
		if (dt.isOverwriteSeqOnComplete()) {
			if (this.getProcessedOn().signum() == 0) {
				String value = DB.getDocumentNo(getC_DocType_ID(), get_TrxName(), true, this);
				if (value != null)
					setDocumentNo(value);
			}
		}
	}

	/**
	 * @param lines
	 * @return true if one of the production is an end product line (IsEndProduct=Y).
	 */
	private boolean isHaveEndProduct(MProductionLine[] lines) {
		
		for(MProductionLine line : lines) {
			if(line.isEndProduct())
				return true;			
		}
		return false;
	}

	/**
	 * Process production lines - create material transaction
	 * @param lines
	 * @return error message or empty string
	 */
	protected Object processLines(MProductionLine[] lines) {
		StringBuilder errors = new StringBuilder();
		for ( int i = 0; i<lines.length; i++) {
			String error = lines[i].createTransactions(getMovementDate(), false);
			if (!Util.isEmpty(error)) {
				errors.append(error);
			} else { 
				lines[i].setProcessed( true );
				lines[i].saveEx(get_TrxName());
			}
		}

		return errors.toString();
	}
	
	/**
	 * Get production lines
	 * @return array of MProductionLine
	 */
	public MProductionLine[] getLines() {
		ArrayList<MProductionLine> list = new ArrayList<MProductionLine>();
		
		String sql = "SELECT pl.M_ProductionLine_ID "
			+ "FROM M_ProductionLine pl "
			+ "WHERE pl.M_Production_ID = ? "
			+ "ORDER BY pl.Line, pl.M_ProductionLine_ID ";
		
		PreparedStatement pstmt = null;
		ResultSet rs = null;
		try
		{
			pstmt = DB.prepareStatement(sql, get_TrxName());
			pstmt.setInt(1, get_ID());
			rs = pstmt.executeQuery();
			while (rs.next())
				list.add( new MProductionLine( getCtx(), rs.getInt(1), get_TrxName() ) );	
		}
		catch (SQLException ex)
		{
			throw new AdempiereException("Unable to load production lines", ex);
		}
		finally
		{
			DB.close(rs, pstmt);
			rs = null;
			pstmt = null;
		}
		
		MProductionLine[] retValue = new MProductionLine[list.size()];
		list.toArray(retValue);
		return retValue;
	}
	
	/**
	 * Delete all production lines
	 * @param trxName
	 */
	public void deleteLines(String trxName) {

		for (MProductionLine line : getLines())
		{
			line.deleteEx(true);
		}

	}// deleteLines

	/**
	 * Create production lines
	 * @param mustBeStocked true to verify BOM component has sufficient on hand
	 * @return number of line created
	 */
	public int createLines(boolean mustBeStocked) {
		return createLines(mustBeStocked, 0);
	}
	
	/**
	 * Create production line
	 * @param mustBeStocked true to verify BOM component has sufficient on hand
	 * @param PP_Product_BOM_ID optional BOM ID. 0 to use default product BOM
	 * @return number of line created
	 */
	public int createLines(boolean mustBeStocked, int PP_Product_BOM_ID) {
		
		lineno = 100;

		count = 0;

		// product to be produced
		MProduct finishedProduct = new MProduct(getCtx(), getM_Product_ID(), get_TrxName());
		
		MProductionLine line = new MProductionLine( this );
		line.setLine( lineno );
		line.setM_Product_ID( finishedProduct.get_ID() );
		line.setM_Locator_ID( getM_Locator_ID() );
		line.setMovementQty( getProductionQty());
		line.setPlannedQty(getProductionQty());
		
		line.saveEx();
		count++;
		
		if (PP_Product_BOM_ID > 0) {
			setPP_Product_BOM_ID(PP_Product_BOM_ID);
			saveEx();
		}
		createLines(mustBeStocked, finishedProduct, getProductionQty(), PP_Product_BOM_ID);
		
		return count;
	}

	/**
	 * Create production line
	 * @param mustBeStocked true to verify BOM component has sufficient on hand
	 * @param finishedProduct end product
	 * @param requiredQty
	 * @param PP_Product_BOM_ID optional BOM ID. 0 to use default product BOM
	 * @return number of line created
	 */
	protected int createLines(boolean mustBeStocked, MProduct finishedProduct, BigDecimal requiredQty, int PP_Product_BOM_ID) {
		
		int defaultLocator = 0;
		
		MLocator finishedLocator = MLocator.get(getCtx(), getM_Locator_ID());
		
		int M_Warehouse_ID = finishedLocator.getM_Warehouse_ID();
		
		// products used in production
		String sql = " SELECT bl.M_Product_ID, bl.QtyBOM" + " FROM PP_Product_BOMLine bl"
				+ " JOIN PP_Product_BOM b ON b.PP_Product_BOM_ID = bl.PP_Product_BOM_ID "
				+ " WHERE b.M_Product_ID=" + finishedProduct.getM_Product_ID() + " AND b.IsActive='Y' AND bl.IsActive='Y' ";				
		if (PP_Product_BOM_ID > 0) {
			sql += " AND b.PP_Product_BOM_ID=" + PP_Product_BOM_ID;
		} else {
			sql += " AND b.BOMType='A' AND b.BOMUse='A' ";
		}
		sql += " ORDER BY bl.Line";
		
		try (PreparedStatement pstmt = DB.prepareStatement(sql, get_TrxName());) {			

			ResultSet rs = pstmt.executeQuery();
			while (rs.next()) {
				
				lineno = lineno + 10;
				int BOMProduct_ID = rs.getInt(1);
				BigDecimal BOMQty = rs.getBigDecimal(2);
				BigDecimal BOMMovementQty = BOMQty.multiply(requiredQty);
				
				MProduct bomproduct = new MProduct(Env.getCtx(), BOMProduct_ID, get_TrxName());
				

				if ( bomproduct.isBOM() && bomproduct.isPhantom() )
				{
					createLines(mustBeStocked, bomproduct, BOMMovementQty, 0);
				}
				else
				{

					defaultLocator = bomproduct.getM_Locator_ID();
					if ( defaultLocator == 0 )
						defaultLocator = getM_Locator_ID();

					if (!bomproduct.isStocked())
					{					
						MProductionLine BOMLine = null;
						BOMLine = new MProductionLine( this );
						BOMLine.setLine( lineno );
						BOMLine.setM_Product_ID( BOMProduct_ID );
						BOMLine.setM_Locator_ID( defaultLocator );  
						BOMLine.setQtyUsed(BOMMovementQty );
						BOMLine.setPlannedQty( BOMMovementQty );
						BOMLine.saveEx(get_TrxName());

						lineno = lineno + 10;
						count++;					
					}
					else if (BOMMovementQty.signum() == 0) 
					{
						MProductionLine BOMLine = null;
						BOMLine = new MProductionLine( this );
						BOMLine.setLine( lineno );
						BOMLine.setM_Product_ID( BOMProduct_ID );
						BOMLine.setM_Locator_ID( defaultLocator );  
						BOMLine.setQtyUsed( BOMMovementQty );
						BOMLine.setPlannedQty( BOMMovementQty );
						BOMLine.saveEx(get_TrxName());

						lineno = lineno + 10;
						count++;
					}
					else
					{

						// BOM stock info
						MStorageOnHand[] storages = null;
						MProduct usedProduct = MProduct.get(getCtx(), BOMProduct_ID);
						defaultLocator = usedProduct.getM_Locator_ID();
						if ( defaultLocator == 0 )
							defaultLocator = getM_Locator_ID();
						if (usedProduct == null || usedProduct.get_ID() == 0)
							return 0;

						MClient client = MClient.get(getCtx());
						MProductCategory pc = MProductCategory.get(getCtx(),
								usedProduct.getM_Product_Category_ID());
						String MMPolicy = pc.getMMPolicy();
						if (MMPolicy == null || MMPolicy.length() == 0) 
						{ 
							MMPolicy = client.getMMPolicy();
						}

						storages = MStorageOnHand.getWarehouse(getCtx(), M_Warehouse_ID, BOMProduct_ID, 0, null,
								MProductCategory.MMPOLICY_FiFo.equals(MMPolicy), true, 0, get_TrxName());

						MProductionLine BOMLine = null;
						int prevLoc = -1;
						// Create lines from storage until qty is reached
						for (int sl = 0; sl < storages.length; sl++) {

							BigDecimal lineQty = storages[sl].getQtyOnHand();
							if (lineQty.signum() != 0) {
								if (lineQty.compareTo(BOMMovementQty) > 0)
									lineQty = BOMMovementQty;


								int loc = storages[sl].getM_Locator_ID();

								// same locator
								if (prevLoc == loc) {
									BOMLine.setQtyUsed(BOMLine.getQtyUsed()
											.add(lineQty));
									BOMLine.setPlannedQty(BOMLine.getQtyUsed());
									BOMLine.saveEx(get_TrxName());

								}
								// otherwise create new line
								else {
									BOMLine = new MProductionLine( this );
									BOMLine.setLine( lineno );
									BOMLine.setM_Product_ID( BOMProduct_ID );
									BOMLine.setM_Locator_ID( loc );
									BOMLine.setQtyUsed( lineQty);
									BOMLine.setPlannedQty( lineQty);
									BOMLine.saveEx(get_TrxName());

									lineno = lineno + 10;
									count++;
								}
								prevLoc = loc;
								// enough ?
								BOMMovementQty = BOMMovementQty.subtract(lineQty);
								if (BOMMovementQty.signum() == 0)
									break;
							}
						} // for available storages

						// fallback
						if (BOMMovementQty.signum() != 0 ) {
							if (!mustBeStocked)
							{

								// same locator
								if (prevLoc == defaultLocator) {
									BOMLine.setQtyUsed(BOMLine.getQtyUsed()
											.add(BOMMovementQty));
									BOMLine.setPlannedQty(BOMLine.getQtyUsed());
									BOMLine.saveEx(get_TrxName());

								}
								// otherwise create new line
								else {

									BOMLine = new MProductionLine( this );
									BOMLine.setLine( lineno );
									BOMLine.setM_Product_ID( BOMProduct_ID );
									BOMLine.setM_Locator_ID( defaultLocator );  
									BOMLine.setQtyUsed( BOMMovementQty);
									BOMLine.setPlannedQty( BOMMovementQty);
									BOMLine.saveEx(get_TrxName());

									lineno = lineno + 10;
									count++;
								}

							}
							else
							{
								throw new AdempiereUserError("Not enough stock of " + BOMProduct_ID);
							}
						}
					}
				}
			} // for all bom products
		} catch (Exception e) {
			throw new AdempiereException("Failed to create production lines", e);
		}

		return count;
	}
	
	@Override
	protected boolean beforeDelete() {
		deleteLines(get_TrxName());
		return true;
	}

	@Override
	public boolean processIt(String processAction) {
		m_processMsg = null;
		DocumentEngine engine = new DocumentEngine (this, getDocStatus());
		return engine.processIt (processAction, getDocAction());
	}

	/**	Process Message 			*/
	protected String		m_processMsg = null;
	/**	Just Prepared Flag			*/
	protected boolean		m_justPrepared = false;

	@Override
	public boolean unlockIt() {
		if (log.isLoggable(Level.INFO)) log.info("unlockIt - " + toString());
		setProcessing(false);
		return true;
	}

	@Override
	public boolean invalidateIt() {
		if (log.isLoggable(Level.INFO)) log.info(toString());
		setDocAction(DOCACTION_Prepare);
		return true;
	}

	@Override
	public String prepareIt() {
		if (log.isLoggable(Level.INFO)) log.info(toString());
		m_processMsg = ModelValidationEngine.get().fireDocValidate(this, ModelValidator.TIMING_BEFORE_PREPARE);
		if (m_processMsg != null)
			return DocAction.STATUS_Invalid;

		//	Std Period open?
		MPeriod.testPeriodOpen(getCtx(), getMovementDate(), getC_DocType_ID(), getAD_Org_ID());
		MAcctSchema.testBackDateTrxAllowed(getCtx(), getMovementDate(), get_TrxName());

		if ( getIsCreated().equals("N") )
		{
			m_processMsg = "Not created";
			return DocAction.STATUS_Invalid; 
		}

		if (!isUseProductionPlan()) {
			m_processMsg = validateEndProduct(getM_Product_ID());			
			if (!Util.isEmpty(m_processMsg)) {
				return DocAction.STATUS_Invalid;
			}
		} else {
			Query planQuery = new Query(getCtx(), I_M_ProductionPlan.Table_Name, "M_ProductionPlan.M_Production_ID=?", get_TrxName());
			List<MProductionPlan> plans = planQuery.setParameters(getM_Production_ID()).list();
			for(MProductionPlan plan : plans) {
				m_processMsg = validateEndProduct(plan.getM_Product_ID());
				if (!Util.isEmpty(m_processMsg)) {
					return DocAction.STATUS_Invalid;
				}
			}
		}

		m_processMsg = ModelValidationEngine.get().fireDocValidate(this, ModelValidator.TIMING_AFTER_PREPARE);
		if (m_processMsg != null)
			return DocAction.STATUS_Invalid;

		m_justPrepared = true;
		if (!DOCACTION_Complete.equals(getDocAction()))
			setDocAction(DOCACTION_Complete);
		return DocAction.STATUS_InProgress;
	}

	/**
	 * @param M_Product_ID
	 * @return error message (if any) or null
	 */
	public String validateEndProduct(int M_Product_ID) {
		String msg = isBom(M_Product_ID);
		if (!Util.isEmpty(msg))
			return msg;

		if (!costsOK(M_Product_ID)) {
			msg = "Excessive difference in standard costs";
			if (MSysConfig.getBooleanValue(MSysConfig.MFG_ValidateCostsDifferenceOnCreate, false, getAD_Client_ID())) {
				return msg;
			} else {
				log.warning(msg);
			}
		}

		return null;
	}

	/**
	 * Validate product has valid BOM
	 * @param M_Product_ID
	 * @return error message or null
	 */
	protected String isBom(int M_Product_ID)
	{
		String bom = DB.getSQLValueString(get_TrxName(), "SELECT isbom FROM M_Product WHERE M_Product_ID = ?", M_Product_ID);
		if ("N".compareTo(bom) == 0)
		{
			return "Attempt to create product line for Non Bill Of Materials";
		}
		int materials = DB.getSQLValue(get_TrxName(), "SELECT count(bl.PP_Product_BOMLine_ID) FROM PP_Product_BOMLine bl JOIN PP_Product_BOM b ON b.PP_Product_BOM_ID = bl.PP_Product_BOM_ID WHERE b.M_Product_ID = ? " +
				" AND bl.IsActive='Y' AND b.IsActive='Y' AND b.BOMType='A' AND b.BOMUse='A' ", M_Product_ID );
		if (materials == 0)
		{
			return "Attempt to create product line for Bill Of Materials with no BOM Components";
		}
		return null;
	}

	/**
	 * Cost validation for BOM product using standard costing method.<br/>
	 * - has cost<br/>
	 * - difference between current product cost and sum of component cost is less than 0.005.
	 * @param M_Product_ID
	 * @return true if cost is ok 
	 * @throws AdempiereUserError
	 */
	protected boolean costsOK(int M_Product_ID) throws AdempiereUserError {
		MProduct product = MProduct.get(getCtx(), M_Product_ID, get_TrxName());
		String costingMethod=product.getCostingMethod(MClient.get(getCtx()).getAcctSchema());
		// will not work if non-standard costing is used
		if (MAcctSchema.COSTINGMETHOD_StandardCosting.equals(costingMethod))
		{	
			String sql = "SELECT ABS(((cc.currentcostprice-(SELECT SUM(c.currentcostprice*bom.qtybom)"
					+ " FROM m_cost c"
					+ " INNER JOIN pp_product_bomline bom ON (c.m_product_id=bom.m_product_id AND bom.IsActive='Y')"
					+ " JOIN pp_product_bom b ON (b.pp_product_bom_id = bom.pp_product_bom_id)"
					+ " WHERE b.m_product_id = pp.m_product_id and b.bomuse='A' and b.bomtype='A' AND b.IsActive='Y')"
					+ " )/cc.currentcostprice))"
					+ " FROM m_product pp"
					+ " INNER JOIN m_cost cc on (cc.m_product_id=pp.m_product_id)"
					+ " INNER JOIN m_costelement ce ON (cc.m_costelement_id=ce.m_costelement_id)"
					+ " WHERE cc.currentcostprice > 0 AND pp.M_Product_ID = ?"
					+ " AND ce.costingmethod='S'";

			BigDecimal costPercentageDiff = DB.getSQLValueBD(get_TrxName(), sql, M_Product_ID);

			if (costPercentageDiff == null)
			{
				costPercentageDiff = Env.ZERO;
				String msg = "Could not retrieve costs";
				if (MSysConfig.getBooleanValue(MSysConfig.MFG_ValidateCostsOnCreate, false, getAD_Client_ID())) {
					throw new AdempiereUserError(msg);
				} else {
					log.warning(msg);
				}
			}

			if ( (costPercentageDiff.compareTo(new BigDecimal("0.005")))< 0 )
				return true;

			return false;
		}
		return true;
	}

	@Override
	public boolean approveIt() {
		return true;
	}

	@Override
	public boolean rejectIt() {
		return true;
	}

	@Override
	public boolean voidIt() {
		if (log.isLoggable(Level.INFO)) log.info(toString());
		// Before Void
		m_processMsg = ModelValidationEngine.get().fireDocValidate(this,ModelValidator.TIMING_BEFORE_VOID);
		if (m_processMsg != null)
			return false;

		if (DOCSTATUS_Closed.equals(getDocStatus())
				|| DOCSTATUS_Reversed.equals(getDocStatus())
				|| DOCSTATUS_Voided.equals(getDocStatus()))
		{
			m_processMsg = "Document Closed: " + getDocStatus();
			setDocAction(DOCACTION_None);
			return false;
		}

		// Not Processed
		if (DOCSTATUS_Drafted.equals(getDocStatus())
				|| DOCSTATUS_Invalid.equals(getDocStatus())
				|| DOCSTATUS_InProgress.equals(getDocStatus())
				|| DOCSTATUS_Approved.equals(getDocStatus())
				|| DOCSTATUS_NotApproved.equals(getDocStatus()) )
		{
			setIsCreated("N");
			if (!isUseProductionPlan()) {
				deleteLines(get_TrxName());
				setProductionQty(BigDecimal.ZERO);
			} else {
				Query planQuery = new Query(Env.getCtx(), I_M_ProductionPlan.Table_Name, "M_ProductionPlan.M_Production_ID=?", get_TrxName());
				List<MProductionPlan> plans = planQuery.setParameters(getM_Production_ID()).list();
				for(MProductionPlan plan : plans) {
					plan.deleteLines(get_TrxName());
					plan.setProductionQty(BigDecimal.ZERO);
					plan.setProcessed(true);
					plan.saveEx();
				}
			}

		}
		else
		{
			boolean accrual = false;
			try 
			{
				MPeriod.testPeriodOpen(getCtx(), getMovementDate(), getC_DocType_ID(), getAD_Org_ID());
			}
			catch (PeriodClosedException e) 
			{
				accrual = true;
			}
			
			try
			{
				MAcctSchema.testBackDateTrxAllowed(getCtx(), getMovementDate(), get_TrxName());
			}
			catch (BackDateTrxNotAllowedException e)
			{
				accrual = true;
			}

			if (accrual)
				return reverseAccrualIt();
			else
				return reverseCorrectIt();
		}

		if (getC_OrderLine_ID() > 0)
			setC_OrderLine_ID(0);

		// After Void
		m_processMsg = ModelValidationEngine.get().fireDocValidate(this,ModelValidator.TIMING_AFTER_VOID);
		if (m_processMsg != null)
			return false;

		setProcessed(true);
		setDocAction(DOCACTION_None);
		return true; 
	}

	@Override
	public boolean closeIt() {
		if (log.isLoggable(Level.INFO)) log.info(toString());
		// Before Close
		m_processMsg = ModelValidationEngine.get().fireDocValidate(this,ModelValidator.TIMING_BEFORE_CLOSE);
		if (m_processMsg != null)
			return false;

		setProcessed(true);
		setDocAction(DOCACTION_None);

		// After Close
		m_processMsg = ModelValidationEngine.get().fireDocValidate(this,ModelValidator.TIMING_AFTER_CLOSE);
		if (m_processMsg != null)
			return false;
		return true;
	}

	@Override
	public boolean reverseCorrectIt() 
	{
		if (log.isLoggable(Level.INFO)) log.info(toString());
		// Before reverseCorrect
		m_processMsg = ModelValidationEngine.get().fireDocValidate(this,ModelValidator.TIMING_BEFORE_REVERSECORRECT);
		if (m_processMsg != null)
			return false;

		MProduction reversal = reverse(false);
		if (reversal == null)
			return false;

		// After reverseCorrect
		m_processMsg = ModelValidationEngine.get().fireDocValidate(this,ModelValidator.TIMING_AFTER_REVERSECORRECT);
		if (m_processMsg != null)
			return false;

		m_processMsg = reversal.getDocumentNo();

		return true;
	}

	/**
	 * Reverse this production document
	 * @param accrual true to use current date, false to use this production's movement date
	 * @return reversal production record
	 */
	protected MProduction reverse(boolean accrual) {
		Timestamp reversalDate = accrual ? Env.getContextAsDate(getCtx(), Env.DATE) : getMovementDate();
		if (reversalDate == null) {
			reversalDate = new Timestamp(System.currentTimeMillis());
		}

		if (getC_OrderLine_ID() > 0)
			setC_OrderLine_ID(0);

		MPeriod.testPeriodOpen(getCtx(), reversalDate, getC_DocType_ID(), getAD_Org_ID());
		MAcctSchema.testBackDateTrxAllowed(getCtx(), reversalDate, get_TrxName());
		MProduction reversal = null;
		reversal = copyFrom (reversalDate);

		StringBuilder msgadd = new StringBuilder("{->").append(getDocumentNo()).append(")");
		reversal.addDescription(msgadd.toString());
		reversal.setReversal_ID(getM_Production_ID());
		reversal.saveEx(get_TrxName());
		
		// Reverse Line Qty
		MProductionLine[] sLines = getLines();
		MProductionLine[] tLines = reversal.getLines();
		for (int i = 0; i < sLines.length; i++)
		{		
			//	We need to copy MA
			if (sLines[i].getM_AttributeSetInstance_ID() == 0)
			{
				MProductionLineMA mas[] = MProductionLineMA.get(getCtx(), sLines[i].get_ID(), get_TrxName());
				for (int j = 0; j < mas.length; j++)
				{
					MProductionLineMA ma = new MProductionLineMA (tLines[i],
						mas[j].getM_AttributeSetInstance_ID(),
						mas[j].getMovementQty().negate(),mas[j].getDateMaterialPolicy());
					ma.saveEx(get_TrxName());					
				}
			}
		}

		if (!reversal.processIt(DocAction.ACTION_Complete))
		{
			m_processMsg = "Reversal ERROR: " + reversal.getProcessMsg();
			return null;
		}

		reversal.closeIt();
		reversal.setProcessing (false);
		reversal.setDocStatus(DOCSTATUS_Reversed);
		reversal.setDocAction(DOCACTION_None);
		reversal.saveEx(get_TrxName());

		msgadd = new StringBuilder("(").append(reversal.getDocumentNo()).append("<-)");
		addDescription(msgadd.toString());

		setProcessed(true);
		setReversal_ID(reversal.getM_Production_ID());
		setDocStatus(DOCSTATUS_Reversed);	//	may come from void
		setDocAction(DOCACTION_None);		

		return reversal;
	}

	/**
	 * Create new production from this production (including lines)
	 * @param reversalDate movement date
	 * @return new production record
	 */
	protected MProduction copyFrom(Timestamp reversalDate) {
		MProduction to = new MProduction(getCtx(), 0, get_TrxName());
		PO.copyValues (this, to, getAD_Client_ID(), getAD_Org_ID());

		to.set_ValueNoCheck ("DocumentNo", null);
		//
		to.setDocStatus (DOCSTATUS_Drafted);		//	Draft
		to.setDocAction(DOCACTION_Complete);
		to.setMovementDate(reversalDate);
		to.setIsComplete(false);
		to.setIsCreated("Y");
		to.setProcessing(false);
		to.setProcessed(false);
		to.setIsUseProductionPlan(isUseProductionPlan());
		if (isUseProductionPlan()) {
			to.saveEx();
			Query planQuery = new Query(Env.getCtx(), I_M_ProductionPlan.Table_Name, "M_ProductionPlan.M_Production_ID=?", get_TrxName());
			List<MProductionPlan> fplans = planQuery.setParameters(getM_Production_ID()).list();
			for(MProductionPlan fplan : fplans) {
				MProductionPlan tplan = new MProductionPlan(getCtx(), 0, get_TrxName());
				PO.copyValues (fplan, tplan, getAD_Client_ID(), getAD_Org_ID());
				tplan.setM_Production_ID(to.getM_Production_ID());
				tplan.setProductionQty(fplan.getProductionQty().negate());
				tplan.setProcessed(false);
				tplan.saveEx();

				MProductionLine[] flines = fplan.getLines();
				for(MProductionLine fline : flines) {
					MProductionLine tline = new MProductionLine(tplan);
					PO.copyValues (fline, tline, getAD_Client_ID(), getAD_Org_ID());
					tline.setM_ProductionPlan_ID(tplan.getM_ProductionPlan_ID());
					tline.setMovementQty(fline.getMovementQty().negate());
					tline.setPlannedQty(fline.getPlannedQty().negate());
					tline.setQtyUsed(fline.getQtyUsed().negate());
					tline.saveEx();
				}
			}
		} else {
			to.setProductionQty(getProductionQty().negate());	
			to.saveEx();
			MProductionLine[] flines = getLines();
			for(MProductionLine fline : flines) {
				MProductionLine tline = new MProductionLine(to);
				PO.copyValues (fline, tline, getAD_Client_ID(), getAD_Org_ID());
				tline.setM_Production_ID(to.getM_Production_ID());
				tline.setMovementQty(fline.getMovementQty().negate());
				tline.setPlannedQty(fline.getPlannedQty().negate());
				tline.setQtyUsed(fline.getQtyUsed().negate());
				tline.saveEx();
			}
		}

		return to;
	}

	/**
	 * 	Add to Description
	 *	@param description text
	 */
	public void addDescription (String description)
	{
		String desc = getDescription();
		if (desc == null)
			setDescription(description);
		else{
			StringBuilder msgd = new StringBuilder(desc).append(" | ").append(description);
			setDescription(msgd.toString());
		}
	}	//	addDescription

	@Override
	public boolean reverseAccrualIt() {
		if (log.isLoggable(Level.INFO)) log.info(toString());
		// Before reverseAccrual
		m_processMsg = ModelValidationEngine.get().fireDocValidate(this,ModelValidator.TIMING_BEFORE_REVERSEACCRUAL);
		if (m_processMsg != null)
			return false;

		MProduction reversal = reverse(true);
		if (reversal == null)
			return false;

		// After reverseAccrual
		m_processMsg = ModelValidationEngine.get().fireDocValidate(this,ModelValidator.TIMING_AFTER_REVERSEACCRUAL);
		if (m_processMsg != null)
			return false;

		m_processMsg = reversal.getDocumentNo();

		return true;
	}

	@Override
	public boolean reActivateIt() {
		if (log.isLoggable(Level.INFO)) log.info("reActivateIt - " + toString());
		// Before reActivate
		m_processMsg = ModelValidationEngine.get().fireDocValidate(this,ModelValidator.TIMING_BEFORE_REACTIVATE);
		if (m_processMsg != null)
			return false;

		// After reActivate
		m_processMsg = ModelValidationEngine.get().fireDocValidate(this,ModelValidator.TIMING_AFTER_REACTIVATE);
		if (m_processMsg != null)
			return false;
		return false;
	}

	@Override
	public String getSummary() {
		return getDocumentNo();
	}

	@Override
	public String getDocumentInfo() {
		return getDocumentNo();
	}

	@Override
	public File createPDF() {
		return null;
	}

	@Override
	public String getProcessMsg() {
		return m_processMsg;
	}

	@Override
	public int getDoc_User_ID() {
		return getCreatedBy();
	}

	@Override
	public int getC_Currency_ID() {
		return MClient.get(getCtx()).getC_Currency_ID();
	}

	@Override
	public BigDecimal getApprovalAmt() {
		return BigDecimal.ZERO;
	}

	@Override
	protected boolean beforeSave(boolean newRecord) {
		if (getC_DocType_ID() <= 0) {
			setC_DocType_ID(MDocType.getDocType(MDocType.DOCBASETYPE_MaterialProduction));
		}
		// Set IsUseProductionPlan flag
		if (getM_Product_ID() > 0) {
			if (isUseProductionPlan()) {
				setIsUseProductionPlan(false);
			}
		} else { 
			if (!isUseProductionPlan()) {
				setIsUseProductionPlan(true);
			}
		}
		return true;
	}

	/**
	 * 	Document Status is Complete, Closed or Reversed
	 *	@return true if CO, CL or RE
	 */
	public boolean isStatusComplete()
	{
		String ds = getDocStatus();
		return DOCSTATUS_Completed.equals(ds)
			|| DOCSTATUS_Closed.equals(ds)
			|| DOCSTATUS_Reversed.equals(ds);
	}	//	isStatusComplete

}
