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/*
   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
 */
package com.ocs.dynamo.ui.converter;

import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.util.Locale;

import org.apache.commons.lang3.StringUtils;

import com.vaadin.flow.data.binder.Result;
import com.vaadin.flow.data.binder.ValueContext;

/**
 * A converter for a Double field that includes a currency symbol.
 * 
 * @author bas.rutten
 */
public class CurrencyDoubleConverter extends GroupingStringToDoubleConverter {

    private static final long serialVersionUID = -8785156070280947096L;

    private String currencySymbol;

    /**
     * 
     * Constructor
     * 
     * @param message        the validation message
     * @param precision
     * @param useGrouping
     * @param currencySymbol
     */
    public CurrencyDoubleConverter(String message, int precision, boolean useGrouping, String currencySymbol) {
        super(message, precision, useGrouping);
        this.currencySymbol = currencySymbol;
    }

    @Override
    public Result convertToModel(String value, ValueContext context) {
        if (value == null) {
            return Result.ok(null);
        }

        value = value.replace(" ", "");
        if (!StringUtils.isEmpty(value) && !value.startsWith(currencySymbol)) {
            value = currencySymbol + value;
        }
        return super.convertToModel(value, context);
    }

    @Override
    protected DecimalFormat constructFormat(Locale locale) {
        DecimalFormat nf = (DecimalFormat) DecimalFormat.getCurrencyInstance(locale);
        nf.applyPattern("¤####,###,###,###.##");

        DecimalFormatSymbols s = nf.getDecimalFormatSymbols();
        s.setCurrencySymbol(currencySymbol);
        nf.setDecimalFormatSymbols(s);
        return nf;
    }

    public String getCurrencySymbol() {
        return currencySymbol;
    }

    public void setCurrencySymbol(String currencySymbol) {
        this.currencySymbol = currencySymbol;
    }
}