/*
 * Copyright (c) 2012, 2013, Credit Suisse (Anatole Tresch), Werner Keil.
 * 
 * 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 org.javamoney.format;

import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;

import javax.inject.Singleton;
import javax.money.CurrencyUnit;


import org.javamoney.format.IsoCurrencyFormat.RenderedField;
import org.javamoney.format.spi.ItemFormatFactorySpi;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@Singleton
public class IsoCurrencyFormatFactory implements
		ItemFormatFactorySpi<CurrencyUnit> {

	private static final Logger LOGGER = LoggerFactory
			.getLogger(IsoCurrencyFormatFactory.class);

	@Override
	public Class<CurrencyUnit> getTargetClass() {
		return CurrencyUnit.class;
	}

	@Override
	public Collection<String> getSupportedStyleIds() {
		Set<String> supportedRenderTypes = new HashSet<String>();
		for (IsoCurrencyFormat.RenderedField f : IsoCurrencyFormat.RenderedField
				.values()) {
			supportedRenderTypes.add(f.name());
		}
		return supportedRenderTypes;
	}

	@Override
	public LocalizationContext getLocalizationStyle(Class<?> targetType,
			String styleId) {
		LocalizationContext style = LocalizationContext.of(targetType, styleId);
		if (LocalizationContext.DEFAULT_ID.equals(styleId)) {
			style = new LocalizationContext.Builder(targetType, styleId)
					.build(true);
		}
		try {
			RenderedField.valueOf(styleId);
			style = new LocalizationContext.Builder(targetType, styleId)
					.build(true);
		} catch (Exception e) {
			// it is not a valid style...
			return style;
		}
		return style;
	}

	@Override
	public boolean isSupportedStyle(String styleId) {
		return getSupportedStyleIds().contains(styleId);
	}

	@Override
	public ItemFormat<CurrencyUnit> getItemFormat(LocalizationContext style)
			throws ItemFormatException {
		if (style != null) {
			String renderedFieldValue = style.getId();
			try {
				IsoCurrencyFormat.RenderedField.valueOf(renderedFieldValue
						.toUpperCase());
			} catch (Exception e) {
				throw new IllegalArgumentException("style's ID must one of "
						+ Arrays.toString(RenderedField.values()));
			}
		}
		return new IsoCurrencyFormat(style);
	}
}