/******************************************************************************
 * Product: Adempiere ERP & CRM Smart Business Solution                       *
 * Copyright (C) 1999-2006 ComPiere, Inc. All Rights Reserved.                *
 * This program is free software; you can redistribute it and/or modify it    *
 * under the terms version 2 of the GNU General Public License as published   *
 * by the Free Software Foundation. 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.,    *
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.                     *
 * For the text or an alternative of this public license, you may reach us    *
 * ComPiere, Inc., 2620 Augustine Dr. #245, Santa Clara, CA 95054, USA        *
 * or via info@compiere.org or http://www.compiere.org/license.html           *
 *****************************************************************************/
package org.compiere.model;

import java.sql.ResultSet;
import java.util.Properties;

import org.compiere.util.Env;
import org.compiere.util.Util;
import org.idempiere.cache.ImmutableIntPOCache;
import org.idempiere.cache.ImmutablePOSupport;
import org.idempiere.expression.logic.LogicEvaluator;

/**
 *	Field Model
 *	
 *  @author Jorg Janke
 *  @version $Id: MField.java,v 1.2 2006/07/30 00:58:04 jjanke Exp $
 */
public class MField extends X_AD_Field implements ImmutablePOSupport
{
	/**
	 * generated serial id 
	 */
	private static final long serialVersionUID = -7382459987895129752L;
	
	/**	Cache						*/
	private static ImmutableIntPOCache<Integer,MField> s_cache = new ImmutableIntPOCache<Integer,MField>(Table_Name, 20);
	
	/**
	 * Get MField from cache
	 * @param AD_Field_ID
	 * @return MField (immutable)
	 */
	public static MField get(int AD_Field_ID)
	{
		return get(Env.getCtx(), AD_Field_ID);
	}
	
	/**
	 * @param ctx context
	 * @param AD_Field_ID
	 * @return Immutable instance of MField
	 */
	public static MField get(Properties ctx, int AD_Field_ID)
	{
		Integer key = Integer.valueOf(AD_Field_ID);
		MField retValue = s_cache.get (ctx, key, e -> new MField(ctx, e));
		if (retValue != null) 
			return retValue;
		
		retValue = new MField (ctx, AD_Field_ID, (String)null);
		if (retValue.get_ID () == AD_Field_ID) {
			s_cache.put (key, retValue, e -> new MField(Env.getCtx(), e));
			return retValue;
		}
		return null;
	}
	
    /**
     * UUID based Constructor
     * @param ctx  Context
     * @param AD_Field_UU  UUID key
     * @param trxName Transaction
     */
    public MField(Properties ctx, String AD_Field_UU, String trxName) {
        super(ctx, AD_Field_UU, trxName);
		if (Util.isEmpty(AD_Field_UU))
			setInitialDefaults();
    }

	/**
	 * 	Standard Constructor
	 *	@param ctx context
	 *	@param AD_Field_ID id
	 *	@param trxName transaction
	 */
	public MField (Properties ctx, int AD_Field_ID, String trxName)
	{
		super (ctx, AD_Field_ID, trxName);
		if (AD_Field_ID == 0)
			setInitialDefaults();
	}	//	MField

	/**
	 * Set the initial defaults for a new record
	 */
	private void setInitialDefaults() {
		setEntityType (ENTITYTYPE_UserMaintained);	// U
		setIsCentrallyMaintained (true);	// Y
		setIsDisplayed (true);	// Y
		setIsDisplayedGrid (true);	// Y
		setIsEncrypted (false);
		setIsFieldOnly (false);
		setIsHeading (false);
		setIsReadOnly (false);
		setIsSameLine (false);
	}

	/**
	 * 	Load Constructor
	 *	@param ctx context
	 *	@param rs result set
	 *	@param trxName transaction
	 */
	public MField (Properties ctx, ResultSet rs, String trxName)
	{
		super(ctx, rs, trxName);
	}	//	MField

	/**
	 * 	Parent Constructor
	 *	@param parent parent
	 */
	public MField (MTab parent)
	{
		this (parent.getCtx(), 0, parent.get_TrxName());
		setClientOrg(parent);
		setAD_Tab_ID(parent.getAD_Tab_ID());
	}	//	MField
	
	/**
	 * 	Copy Constructor
	 *	@param parent parent
	 *	@param from copy from
	 */
	public MField (MTab parent, MField from)
	{
		this (parent.getCtx(), 0, parent.get_TrxName());
		copyValues(from, this);
		setClientOrg(parent);
		setAD_Tab_ID(parent.getAD_Tab_ID());
		setEntityType(parent.getEntityType());
	}	//	M_Field
	
	/**
	 * Copy Constructor
	 * @param copy
	 */
	public MField(MField copy) 
	{
		this(Env.getCtx(), copy);
	}

	/**
	 * Copy Constructor
	 * @param ctx
	 * @param copy
	 */
	public MField(Properties ctx, MField copy) 
	{
		this(ctx, copy, (String) null);
	}

	/**
	 * Copy Constructor
	 * @param ctx
	 * @param copy
	 * @param trxName
	 */
	public MField(Properties ctx, MField copy, String trxName) 
	{
		this(ctx, 0, trxName);
		copyPO(copy);
	}
	
	/**
	 * 	Set Column Values
	 *	@param column column
	 */
	public void setColumn (MColumn column)
	{
		setAD_Column_ID (column.getAD_Column_ID());
		setName (column.getName());
		setDescription(column.getDescription());
		setHelp(column.getHelp());
		setDisplayLength(column.getFieldLength());
		setEntityType(column.getEntityType());
	}	//	setColumn
	
	/**
	 * 	beforeSave
	 *	@see org.compiere.model.PO#beforeSave(boolean)
	 *	@param newRecord
	 *	@return
	 */
	@Override
	protected boolean beforeSave(boolean newRecord)
	{
		//	Sync Terminology
		if ((newRecord || is_ValueChanged("AD_Column_ID")) 
			&& isCentrallyMaintained())
		{
			M_Element element = M_Element.getOfColumn(getCtx(), getAD_Column_ID(), get_TrxName());
			setName (element.getName ());
			setDescription (element.getDescription ());
			setHelp (element.getHelp());
		}
		
		if (getIsAllowCopy() != null) {
			MColumn column = (MColumn) getAD_Column();
			if (   column.isKey()
				|| column.isVirtualColumn()
				|| column.isUUIDColumn()
				|| (column.isStandardColumn() && !column.getColumnName().equals("AD_Org_ID")) // AD_Org_ID can be copied
			)
				setIsAllowCopy(null);
		}
		if (getIsAllowCopy() == null) { // IDEMPIERE-67
			// By default allow copy of AD_Org_ID overwriting value
			if (getAD_Column().getColumnName().equals("AD_Org_ID")) // AD_Org_ID can be copied
				setIsAllowCopy("Y");
		}
		if (getAD_Reference_ID() <= 0) {
			if (getAD_Reference_Value_ID()!=0)
				setAD_Reference_Value_ID(0);
			if (getAD_Val_Rule_ID()!=0)
				setAD_Val_Rule_ID(0);
			if (getIsToolbarButton() != null)
				setIsToolbarButton(null);
		}
		
		//If the column is a virtual search column - set displayed to false 
		if (isDisplayed()) {
			MColumn column = (MColumn) getAD_Column();
			if (column.isVirtualSearchColumn()) {
				setIsDisplayed(false);
				setIsDisplayedGrid(false);
			}
		}
		
		//validate logic expression
		if (newRecord || is_ValueChanged(COLUMNNAME_ReadOnlyLogic)) {
			if (isActive() && !Util.isEmpty(getReadOnlyLogic(), true) && !getReadOnlyLogic().startsWith(MColumn.VIRTUAL_UI_COLUMN_PREFIX)) {
				LogicEvaluator.validate(getReadOnlyLogic());
			}
		}
		if (newRecord || is_ValueChanged(COLUMNNAME_DisplayLogic)) {
			if (isActive() && !Util.isEmpty(getDisplayLogic(), true) && !getDisplayLogic().startsWith(MColumn.VIRTUAL_UI_COLUMN_PREFIX)) {
				LogicEvaluator.validate(getDisplayLogic());
			}
		}
		if (newRecord || is_ValueChanged(COLUMNNAME_MandatoryLogic)) {
			if (isActive() && !Util.isEmpty(getMandatoryLogic(), true) && !getMandatoryLogic().startsWith(MColumn.VIRTUAL_UI_COLUMN_PREFIX)) {
				LogicEvaluator.validate(getMandatoryLogic());
			}
		}
		
		return true;
	}	//	beforeSave
	
	@Override
	public MField markImmutable() {
		if (is_Immutable())
			return this;

		makeImmutable();
		return this;
	}

}	//	MField