package org.apidesign.apifest08.test;

import java.util.Currency;

import junit.framework.TestCase;

import org.apidesign.apifest08.currency.Convertor;

import org.apidesign.apifest08.currency.ConvertorFactory;

import org.apidesign.apifest08.currency.MoneyImpl;

/** Finish the Convertor API, and then write bodies of methods inside

 * of this class to match the given tasks. To fullfil your task, use the

 * API define in the <code>org.apidesign.apifest08.currency</code> package.

 * Do not you reflection, or other hacks as your code

 * shall run without any runtime permissions.

 */

public class Task1Test extends TestCase {

	public static final Currency USD = Currency.getInstance("USD");

	public static final Currency CZK = Currency.getInstance("CZK");

	public static final Currency SKK = Currency.getInstance("SKK");

    public Task1Test(String testName) {

        super(testName);

    }

    @Override

    protected void setUp() throws Exception {

    }

    @Override

    protected void tearDown() throws Exception {

    }

    /** Create convertor that understands two currencies, CZK and

     *  USD. Make 1 USD == 17 CZK.

     *

     * Creation of the convertor shall not require subclassing of any class

     * or interface on the client side.

     *

     * @return prepared convertor ready for converting USD to CZK and CZK to USD

     */

    public static Convertor createCZKtoUSD() {

      //You can use both variants. I wrote the first one but than I realized that maybe

      //you want me to write the second one. So I have written both. 

      return ConvertorFactory.createConvertor(CZK, USD);

      //return ConvertorFactory.createConvertor(new MoneyImpl(17,CZK), new MoneyImpl(1,USD));

    }

    /** Create convertor that understands two currencies, CZK and

     *  SKK. Make 100 SKK == 80 CZK.

     *

     * Creation of the convertor shall not require subclassing of any class

     * or interface on the client side.

     * 

     * @return prepared convertor ready for converting SKK to CZK and CZK to SKK

     */

    public static Convertor createSKKtoCZK() {

    	//You can use both variants. I wrote the first one but than I realized that maybe

        //you want me to write the second one. So I have written both.

        //return ConvertorFactory.createConvertor(SKK, CZK);

        return ConvertorFactory.createConvertor(new MoneyImpl(100,SKK), new MoneyImpl(80,CZK));

    }

    /** Use the convertor from <code>createCZKtoUSD</code> method and do few conversions

     * with it.

     */

    public void testCurrencyCZKUSD() throws Exception {

        Convertor czkToUsdConvertor = createCZKtoUSD();

        // convert $5 to CZK using c:

        Convertor usdToCzkConvertor = czkToUsdConvertor.revert();

		assertEquals("Result is 85 CZK",new MoneyImpl(85,CZK), usdToCzkConvertor.convert(new MoneyImpl(5,USD)));

        // convert $8 to CZK

        assertEquals("Result is 136 CZK",new MoneyImpl(136,CZK), usdToCzkConvertor.convert(new MoneyImpl(8,USD)));

        // convert 1003CZK to USD

        assertEquals("Result is 59 USD", new MoneyImpl(59,USD), czkToUsdConvertor.convert(new MoneyImpl(1003,CZK)));

    }

    /** Use the convertor from <code>createSKKtoCZK</code> method and do few conversions

     * with it.

     */

    public void testCurrencySKKCZK() throws Exception {

        Convertor skkToCzkConvertor = createSKKtoCZK();

        // convert 16CZK using c:

        assertEquals("Result is 20 SKK", new MoneyImpl(20,SKK), skkToCzkConvertor.revert().convert(new MoneyImpl(16,CZK)));

        // convert 500SKK to CZK

        assertEquals("Result is 400 CZK", new MoneyImpl(400,CZK), skkToCzkConvertor.convert(new MoneyImpl(500,SKK)));

    }

}