/*
 * Copyright 2008 ZXing authors
 *
 * 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.google.zxing.client.result;

import com.google.zxing.Result;

import java.util.ArrayList;
import java.util.List;

/**
 * Implements KDDI AU's address book format. See
 * <a href="http://www.au.kddi.com/ezfactory/tec/two_dimensions/index.html">
 * http://www.au.kddi.com/ezfactory/tec/two_dimensions/index.html</a>. (Thanks
 * to Yuzo for translating!)
 * 
 * @author Sean Owen
 */
public final class AddressBookAUResultParser extends ResultParser {

	@Override
	public AddressBookParsedResult parse(Result result) {
		String rawText = getMassagedText(result);
		// MEMORY is mandatory; seems like a decent indicator, as does
		// end-of-record separator CR/LF
		if (!rawText.contains("MEMORY") || !rawText.contains("\r\n")) {
			return null;
		}

		// NAME1 and NAME2 have specific uses, namely written name and
		// pronunciation, respectively.
		// Therefore we treat them specially instead of as an array of names.
		String name = matchSinglePrefixedField("NAME1:", rawText, '\r', true);
		String pronunciation = matchSinglePrefixedField("NAME2:", rawText, '\r', true);

		String[] phoneNumbers = matchMultipleValuePrefix("TEL", 3, rawText, true);
		String[] emails = matchMultipleValuePrefix("MAIL", 3, rawText, true);
		String note = matchSinglePrefixedField("MEMORY:", rawText, '\r', false);
		String address = matchSinglePrefixedField("ADD:", rawText, '\r', true);
		String[] addresses = address == null ? null : new String[] { address };
		return new AddressBookParsedResult(maybeWrap(name), null, pronunciation, phoneNumbers, null, emails, null, null,
				note, addresses, null, null, null, null, null, null);
	}

	private static String[] matchMultipleValuePrefix(String prefix, int max, String rawText, boolean trim) {
		List<String> values = null;
		for (int i = 1; i <= max; i++) {
			String value = matchSinglePrefixedField(prefix + i + ':', rawText, '\r', trim);
			if (value == null) {
				break;
			}
			if (values == null) {
				values = new ArrayList<>(max); // lazy init
			}
			values.add(value);
		}
		if (values == null) {
			return null;
		}
		return values.toArray(new String[values.size()]);
	}

}
