/*

 * Copyright (c) 2007, 2016, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * @test

 * @bug 4290801 4692419 4693631 5101540 5104960 6296410 6336600 6371531

 *    6488442 7036905 8008577 8039317 8074350 8074351 8150324 8167143

 * @summary Basic tests for Currency class.

 * @modules java.base/java.util:open

 *          jdk.localedata

 */

import java.io.ByteArrayInputStream;

import java.io.ByteArrayOutputStream;

import java.io.ObjectInputStream;

import java.io.ObjectOutputStream;

import java.time.LocalDate;

import java.time.LocalTime;

import java.time.ZoneId;

import java.time.ZonedDateTime;

import java.util.Currency;

import java.util.Locale;

public class CurrencyTest {

    public static void main(String[] args) throws Exception {

        CheckDataVersion.check();

        testCurrencyCodeValidation();

        testLocaleMapping();

        testSymbols();

        testFractionDigits();

        testSerialization();

        testDisplayNames();

        testFundsCodes();

    }

    static void testCurrencyCodeValidation() {

        // test creation of some valid currencies

        testValidCurrency("USD");

        testValidCurrency("EUR");

        testValidCurrency("GBP");

        testValidCurrency("JPY");

        testValidCurrency("CNY");

        testValidCurrency("CHF");

        // test creation of some fictitious currencies

        testInvalidCurrency("AQD");

        testInvalidCurrency("US$");

        testInvalidCurrency("\u20AC");

    }

    static void testValidCurrency(String currencyCode) {

        Currency currency1 = Currency.getInstance(currencyCode);

        Currency currency2 = Currency.getInstance(currencyCode);

        if (currency1 != currency2) {

            throw new RuntimeException("Didn't get same instance for same currency code");

        }

        if (!currency1.getCurrencyCode().equals(currencyCode)) {

            throw new RuntimeException("Currency code changed");

        }

    }

    static void testInvalidCurrency(String currencyCode) {

        boolean gotException = false;

        try {

            Currency currency = Currency.getInstance(currencyCode);

        } catch (IllegalArgumentException e) {

            gotException = true;

        }

        if (!gotException) {

            throw new RuntimeException("didn't get specified exception");

        }

    }

    static void testLocaleMapping() {

        // very basic test: most countries have their own currency, and then

        // their currency code is an extension of their country code.

        Locale[] locales = Locale.getAvailableLocales();

        int goodCountries = 0;

        int ownCurrencies = 0;

        for (int i = 0; i < locales.length; i++) {

            Locale locale = locales[i];

            String ctryCode = locale.getCountry();

            int ctryLength = ctryCode.length();

            if (ctryLength == 0 ||

                ctryLength == 3 || // UN M.49 code

                ctryCode.matches("AA|Q[M-Z]|X[A-Z]|ZZ" + // user defined codes

                                 "AC|CP|DG|EA|EU|FX|IC|SU|TA|UK")) { // exceptional reservation codes

                boolean gotException = false;

                try {

                    Currency.getInstance(locale);

                } catch (IllegalArgumentException e) {

                    gotException = true;

                }

                if (!gotException) {

                    throw new RuntimeException("didn't get specified exception");

                }

            } else {

                goodCountries++;

                Currency currency = Currency.getInstance(locale);

                if (currency.getCurrencyCode().indexOf(locale.getCountry()) == 0) {

                    ownCurrencies++;

                }

            }

        }

        System.out.println("Countries tested: " + goodCountries +

                ", own currencies: " + ownCurrencies);

        if (ownCurrencies < (goodCountries / 2 + 1)) {

            throw new RuntimeException("suspicious: not enough countries have their own currency.");

        }

        // check a few countries that don't change their currencies too often

        String[] country1 = {"US", "CA", "JP", "CN", "SG", "CH"};

        String[] currency1 = {"USD", "CAD", "JPY", "CNY", "SGD", "CHF"};

        for (int i = 0; i < country1.length; i++) {

            checkCountryCurrency(country1[i], currency1[i]);

        }

        /*

        * check currency changes

        * In current implementation, there is no data of old currency and transition date at jdk/make/data/currency/CurrencyData.properties.

        * So, all the switch data arrays are empty. In the future, if data of old currency and transition date are necessary for any country, the

        * arrays here can be updated so that the program can check the currency switch.

        */

        String[] switchOverCtry = {};

        String[] switchOverOld = {};

        String[] switchOverNew = {};

        String[] switchOverTZ = {};

        int[] switchOverYear = {};

        int[] switchOverMonth = {}; // java.time APIs accept month starting from 1 i.e. 01 for January

        int[] switchOverDay = {};

        for (int i = 0; i < switchOverCtry.length; i++) {

            ZoneId zoneId = ZoneId.of(switchOverTZ[i]);

            ZonedDateTime zonedDateAndTime  = ZonedDateTime.of(LocalDate.of(switchOverYear[i], switchOverMonth[i], switchOverDay[i]),

                                                  LocalTime.MIDNIGHT, zoneId);

            ZonedDateTime currentZonedDateAndTime =  ZonedDateTime.now(zoneId);

            checkCountryCurrency(switchOverCtry[i], (currentZonedDateAndTime.isAfter(zonedDateAndTime) ||

                        currentZonedDateAndTime.isEqual(zonedDateAndTime)) ? switchOverNew[i] : switchOverOld[i]);

        }

        // check a country code which doesn't have a currency

        checkCountryCurrency("AQ", null);

        // check an invalid country code

        boolean gotException = false;

        try {

            Currency.getInstance(new Locale("", "EU"));

        } catch (IllegalArgumentException e) {

            gotException = true;

        }

        if (!gotException) {

            throw new RuntimeException("didn't get specified exception.");

        }

    }

    static void checkCountryCurrency(String countryCode, String expected) {

        Locale locale = new Locale("", countryCode);

        Currency currency = Currency.getInstance(locale);

        String code = (currency != null) ? currency.getCurrencyCode() : null;

        if (!(expected == null ? code == null : expected.equals(code))) {

            throw new RuntimeException("Wrong currency for " +

                    locale.getDisplayCountry() +

                    ": expected " + expected + ", got " + code);

        }

    }

    static void testSymbols() {

        testSymbol("USD", Locale.US, "$");

        testSymbol("EUR", Locale.GERMANY, "\u20AC");

        testSymbol("USD", Locale.PRC, "US$");

    }

    static void testSymbol(String currencyCode, Locale locale, String expectedSymbol) {

        String symbol = Currency.getInstance(currencyCode).getSymbol(locale);

        if (!symbol.equals(expectedSymbol)) {

            throw new RuntimeException("Wrong symbol for currency " +

                    currencyCode +": expected " + expectedSymbol +

                    ", got " + symbol);

        }

    }

    static void testFractionDigits() {

        testFractionDigits("USD", 2);

        testFractionDigits("EUR", 2);

        testFractionDigits("JPY", 0);

        testFractionDigits("XDR", -1);

        testFractionDigits("BHD", 3);

        testFractionDigits("IQD", 3);

        testFractionDigits("JOD", 3);

        testFractionDigits("KWD", 3);

        testFractionDigits("LYD", 3);

        testFractionDigits("OMR", 3);

        testFractionDigits("TND", 3);

        // Turkish Lira

        testFractionDigits("TRL", 0);

        testFractionDigits("TRY", 2);

    }

    static void testFractionDigits(String currencyCode, int expectedFractionDigits) {

        int digits = Currency.getInstance(currencyCode).getDefaultFractionDigits();

        if (digits != expectedFractionDigits) {

            throw new RuntimeException("Wrong number of fraction digits for currency " +

                    currencyCode +": expected " + expectedFractionDigits +

                    ", got " + digits);

        }

    }

    static void testSerialization() throws Exception {

        Currency currency1 = Currency.getInstance("DEM");

        ByteArrayOutputStream baos = new ByteArrayOutputStream();

        ObjectOutputStream oStream = new ObjectOutputStream(baos);

        oStream.writeObject(currency1);

        oStream.flush();

        byte[] bytes = baos.toByteArray();

        ByteArrayInputStream bais = new ByteArrayInputStream(bytes);

        ObjectInputStream iStream = new ObjectInputStream(bais);

        Currency currency2 = (Currency) iStream.readObject();

        if (currency1 != currency2) {

            throw new RuntimeException("serialization breaks class invariant");

        }

    }

    static void testDisplayNames() {

        // null argument test

        try {

            testDisplayName("USD", null, "");

            throw new RuntimeException("getDisplayName(NULL) did not throw an NPE.");

        } catch (NullPointerException npe) {}

        testDisplayName("USD", Locale.ENGLISH, "US Dollar");

        testDisplayName("FRF", Locale.FRENCH, "franc fran\u00e7ais");

        testDisplayName("DEM", Locale.GERMAN, "Deutsche Mark");

        testDisplayName("ESP", new Locale("es"), "peseta espa\u00f1ola");

        testDisplayName("ITL", new Locale("it"), "lira italiana");

        testDisplayName("JPY", Locale.JAPANESE, "\u65e5\u672c\u5186");

        testDisplayName("KRW", Locale.KOREAN, "\ub300\ud55c\ubbfc\uad6d \uc6d0");

        testDisplayName("SEK", new Locale("sv"), "svensk krona");

        testDisplayName("CNY", Locale.SIMPLIFIED_CHINESE, "\u4eba\u6c11\u5e01");

        testDisplayName("TWD", Locale.TRADITIONAL_CHINESE, "\u65b0\u53f0\u5e63");

    }

    static void testDisplayName(String currencyCode, Locale locale, String expectedName) {

        String name = Currency.getInstance(currencyCode).getDisplayName(locale);

        if (!name.equals(expectedName)) {

            throw new RuntimeException("Wrong display name for currency " +

                    currencyCode +": expected '" + expectedName +

                    "', got '" + name + "'");

        }

    }

    static void testFundsCodes() {

        testValidCurrency("BOV");

        testValidCurrency("CHE");

        testValidCurrency("CHW");

        testValidCurrency("CLF");

        testValidCurrency("COU");

        testValidCurrency("MXV");

        testValidCurrency("USN");

        testValidCurrency("UYI");

        testFractionDigits("BOV", 2);

        testFractionDigits("CHE", 2);

        testFractionDigits("CHW", 2);

        testFractionDigits("CLF", 4);

        testFractionDigits("COU", 2);

        testFractionDigits("MXV", 2);

        testFractionDigits("USN", 2);

        testFractionDigits("UYI", 0);

        testNumericCode("BOV", 984);

        testNumericCode("CHE", 947);

        testNumericCode("CHW", 948);

        testNumericCode("CLF", 990);

        testNumericCode("COU", 970);

        testNumericCode("MXV", 979);

        testNumericCode("USN", 997);

        testNumericCode("UYI", 940);

    }

    static void testNumericCode(String currencyCode, int expectedNumeric) {

        int numeric = Currency.getInstance(currencyCode).getNumericCode();

        if (numeric != expectedNumeric) {

            throw new RuntimeException("Wrong numeric code for currency " +

                    currencyCode +": expected " + expectedNumeric +

                    ", got " + numeric);

        }

    }

}