/*******************************************************************************
 * Copyright (c) 2013 Ziver
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 ******************************************************************************/

package zutil.test;

import static org.junit.Assert.assertEquals;

import java.io.*;

import org.junit.Test;

import zutil.io.StringOutputStream;
import zutil.parser.json.JSONObjectInputStream;
import zutil.parser.json.JSONObjectOutputStream;

public class JSONSerializerTest{

	@Test
	public void testJavaLegacySerialize() throws InterruptedException, IOException, ClassNotFoundException{
		TestClass sourceObj = new TestClass().init();
		
		ByteArrayOutputStream bout = new ByteArrayOutputStream();
		ObjectOutputStream out = new ObjectOutputStream(bout);
		out.writeObject(sourceObj);
		out.flush();
		out.close();
		byte[] data = bout.toByteArray();
		
		ByteArrayInputStream bin = new ByteArrayInputStream(data);
		ObjectInputStream in = new ObjectInputStream(bin);
		TestClass targetObj = (TestClass) in.readObject();
		in.close();
		
		assertEquals( sourceObj, targetObj );
	}
	
    @Test
    public void testOutputSerializerWithPrimitives() throws InterruptedException, IOException, ClassNotFoundException{
        TestClass sourceObj = new TestClass().init();

        String data = writeObjectToJson(sourceObj);
        data = data.replace("\"", "'");

        assertEquals(
        		"{'str': '1234', '@class': 'zutil.test.JSONSerializerTest$TestClass', 'obj1': {'@class': 'zutil.test.JSONSerializerTest$TestObj', 'value': '42', '@object_id': 2}, 'obj2': {'@class': 'zutil.test.JSONSerializerTest$TestObj', 'value': '42', '@object_id': 3}, 'decimal': '1.1', '@object_id': 1}",
                data);
    }
	
	@Test
	public void testInputSerializerWithPrimitives() throws InterruptedException, IOException, ClassNotFoundException{
		TestClass sourceObj = new TestClass().init();
		
		TestClass targetObj = sendReceiveObject(sourceObj);
		
		assertEquals( sourceObj, targetObj );
	}
	
    @Test
    public void testOutputSerializerWithClones() throws InterruptedException, IOException, ClassNotFoundException{
    	TestClassObjClone sourceObj = new TestClassObjClone().init();

        String data = writeObjectToJson(sourceObj);
        data = data.replace("\"", "'");

        assertEquals(
                "{'@class': 'zutil.test.JSONSerializerTest$TestClassObjClone', 'obj1': {'@class': 'zutil.test.JSONSerializerTest$TestObj', 'value': '42', '@object_id': 2}, 'obj2': {'@class': 'zutil.test.JSONSerializerTest$TestObj', '@object_id': 2}, '@object_id': 1}",
                data);
    }
	
	@Test
	public void testInputSerializerWithClones() throws InterruptedException, IOException, ClassNotFoundException{
		TestClassObjClone sourceObj = new TestClassObjClone().init();
		
		TestClassObjClone targetObj = sendReceiveObject(sourceObj);
		
		assertEquals( sourceObj, targetObj );
	}
	
	
	

	/******************* Utility Functions ************************************/
	
	private static <T> T sendReceiveObject(T sourceObj) throws IOException{ 
		return readObjectFromJson(
				writeObjectToJson(sourceObj));
	}
	
	@SuppressWarnings("unchecked")
	private static <T> T readObjectFromJson(String json) throws IOException{
		StringReader bin = new StringReader(json);
		JSONObjectInputStream in = new JSONObjectInputStream(bin);
		T targetObj = (T) in.readObject();
		in.close();
		
		return targetObj;
	}
	
	private static <T> String writeObjectToJson(T sourceObj) throws IOException{
		StringOutputStream bout = new StringOutputStream();
		JSONObjectOutputStream out = new JSONObjectOutputStream(bout);
		
		out.writeObject(sourceObj);
		out.flush();
		out.close();
		
		String data = bout.toString();
        System.out.println(data);
        
        return data;
	}
	
	/******************** Test Classes ************************************/
	
	public static class TestClass implements Serializable{
		private static final long serialVersionUID = 1L;
		String str;
		double decimal;
		TestObj obj1;
		TestObj obj2;
		
		public TestClass init(){
			this.str = "1234";
			this.decimal = 1.1;
			this.obj1 = new TestObj().init();
			this.obj2 = new TestObj().init();
			return this;
		}
		
		public boolean equals(Object obj){
			return obj instanceof TestClass && 
					this.str.equals(((TestClass)obj).str) &&
					this.decimal == ((TestClass)obj).decimal &&
					this.obj1.equals(((TestClass)obj).obj1) &&
					this.obj2.equals(((TestClass)obj).obj2);
		}
	}
	
	public static class TestClassObjClone{
		TestObj obj1;
		TestObj obj2;
		
		public TestClassObjClone init(){
			this.obj1 = this.obj2 = new TestObj().init();
			return this;
		}
		
		public boolean equals(Object obj){
			return obj instanceof TestClassObjClone && 
					this.obj1.equals(((TestClassObjClone)obj).obj1) &&
					this.obj1 == this.obj2 &&
					((TestClassObjClone)obj).obj1 == ((TestClassObjClone)obj).obj2;
		}
	}
	
	public static class TestObj implements Serializable{
		private static final long serialVersionUID = 1L;
		int value;
		
		public TestObj init(){
			this.value = 42;
			return this;
		}
		
		public boolean equals(Object obj){
			return obj instanceof TestObj && this.value == ((TestObj)obj).value;
		}
	}
}