// This Source Code is in the Public Domain per: http://unlicense.org
package org.litesoft.aokeyhole.objects;

import org.litesoft.aokeyhole.objects.support.*;
import org.litesoft.aokeyhole.persist.*;

public class Property extends AbstractBase {
    private PropertyMetaData mMetaData;
    private boolean mEditable;
    private Object mValue;

    public Property( PropertyMetaData pMetaData, boolean pEditable ) {
        mMetaData = pMetaData;
        mEditable = pEditable;
        mValue = pMetaData.getInitialValue();
    }

    public PropertyMetaData getMetaData() {
        return mMetaData;
    }

    public boolean isEditable() {
        return mEditable;
    }

    public String getName() {
        return mMetaData.getName();
    }

    public Object getValue() {
        return mValue;
    }

    public String getValueAsString() {
        return mMetaData.valueToString( mValue );
    }

    public void unpersistValue( Object pValue ) {
        updateValue( pValue );
    }

    /**
     * @return true if Value actually changed
     */
    public boolean setValue( Object pValue ) {
        if ( !mEditable ) {
            throw new IllegalStateException( getName() + " is Not Editable" );
        }
        return updateValue( pValue );
    }

    /**
     * @return true if Value actually changed
     */
    protected boolean updateValue( Object pValue ) {
        if ( pValue instanceof String ) {
            pValue = ((String) pValue).trim();
            if ( "".equals( pValue ) ) {
                pValue = null;
            }
        }
        if ( areEqual( mValue, pValue ) ) {
            return false;
        }
        mValue = pValue;
        return true;
    }

    /**
     * @return true if Value actually changed
     */
    public boolean reset() {
        return setValue( mMetaData.getInitialValue() );
    }

    public void addTo( PropertyableBuilder pBuilder ) {
        PropertyMetaData md = getMetaData();
        Object value = getValue();
        if ( pBuilder.recordAllProperties() || !areEqual( md.getInitialValue(), value ) ) {
            pBuilder.addProperty( getName(), md.valueToString( value ) );
        }
    }

    public void setRehydrated() {
    }

    /**
     * @return null or Error
     */
    public String validatePersistable() {
        if ( getMetaData().getRequired().isData() && (getValue() == null) ) {
            return getName() + " is Required";
        }
        return null;
    }

    @Override
    public String toString() {
        return "" + getMetaData() + ":" + getValueAsString();
    }
}