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

import org.litesoft.commonfoundation.base.*;
import org.litesoft.commonfoundation.typeutils.*;

public class QuantityScannerFieldsProcessor implements QuantityScannerFieldsLogic {
    private int mQuantity = 0;
    private boolean mAdding = false;
    private BarcodeQuantityReactor mReactor;
    private QuantityScannerFieldsAccessor mAccessor;

    public QuantityScannerFieldsProcessor( BarcodeQuantityReactor pReactor ) {
        mReactor = pReactor;
    }

    public void setFieldsAccessor( QuantityScannerFieldsAccessor pAccessor ) {
        mAccessor = pAccessor;
    }

    public Integer getSetQuantity() {
        return (!mAdding && (mQuantity > 0)) ? mQuantity : null;
    }

    public void changedScannerInput( String pValue ) {

    }

    public void changedQuantityInput( String pValue ) {

    }

    public void enteredScannerInput( String pValue ) {
        if ( null == (pValue = ConstrainTo.significantOrNull( pValue )) ) {
            return;
        }

        if ( Strings.isNumeric( pValue, pValue.length() ) && (pValue.length() > 3) ) {
            mReactor.incrementOrSetQuantity( pValue, mAdding, mQuantity );
            return;
        }
        if ( pValue.startsWith( "+" ) ) {
            mAdding = true;
            pValue = pValue.substring( 1 );
        } else if ( pValue.startsWith( "/K" ) ) {
            mAdding = true;
            pValue = pValue.substring( 2 );
        }
        if ( null == (pValue = ConstrainTo.significantOrNull( pValue )) ) {
            return;
        }

        int zNewQty;
        try {
            zNewQty = Integer.parseInt( pValue );
        }
        catch ( NumberFormatException e ) {
            mAccessor.setScannerError( "Not Parseable" );
            return;
        }

        if ( mAdding ) {
            mQuantity = mQuantity + zNewQty;
            mAccessor.setInput( "+" + mQuantity, "" );
        } else {
            mQuantity = zNewQty;
            mAccessor.setInput( "" + mQuantity, "" );
        }
    }

    public void enteredQuantityInput( String pValue ) {
        if ( null == (pValue = ConstrainTo.significantOrNull( pValue )) ) {
            mQuantity = 0;
            return;
        }
        if ( pValue.startsWith( "+" ) ) {
            mAdding = true;
            pValue = pValue.substring( 1 );
        }
        if ( null == (pValue = ConstrainTo.significantOrNull( pValue )) ) {
            mQuantity = 0;
            mAccessor.setInput( "", "" );
            return;
        }
        try {
            mQuantity = Integer.parseInt( pValue );
        }
        catch ( NumberFormatException e ) {
            mAccessor.setQuantityError( "Not Parseable" );
            return;
        }
        if ( mAdding ) {
            mAccessor.setInput( "+" + mQuantity, "" );
        } else {
            mAccessor.setInput( "" + mQuantity, "" );
        }
    }

    public void setErrors( String pErrorBarcode, String pErrorQuantity ) {
        mAccessor.setScannerError( pErrorBarcode );
        mAccessor.setQuantityError( pErrorQuantity );
    }

    public void ok() {
        mAdding = false;
        mQuantity = 0;
        mAccessor.initialize();
        mAccessor.setInput( "", "" );
        mAccessor.setQuantityError( "" );
        mAccessor.setScannerError( "" );
    }
}