package wx.encryption;

import static org.junit.Assert.*;

import java.io.IOException;
import java.io.StringReader;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

public class WXBizMsgCryptTest {
	String encodingAesKey = "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFG";
	String token = "pamtest";
	String timestamp = "1409304348";
	String nonce = "xxxxxx";
	String corpId = "wxb11529c136998cb6";
	String replyMsg = "我是中文abcd123";
	String xmlFormat = "<xml><ToUserName><![CDATA[toUser]]></ToUserName><Encrypt><![CDATA[%1$s]]></Encrypt></xml>";
	String afterAesEncrypt = "jn1L23DB+6ELqJ+6bruv21Y6MD7KeIfP82D6gU39rmkgczbWwt5+3bnyg5K55bgVtVzd832WzZGMhkP72vVOfg==";
	String randomStr = "aaaabbbbccccdddd";

	String replyMsg2 = "<xml><ToUserName><![CDATA[oia2Tj我是中文jewbmiOUlr6X-1crbLOvLw]]></ToUserName><FromUserName><![CDATA[gh_7f083739789a]]></FromUserName><CreateTime>1407743423</CreateTime><MsgType><![CDATA[video]]></MsgType><Video><MediaId><![CDATA[eYJ1MbwPRJtOvIEabaxHs7TX2D-HV71s79GUxqdUkjm6Gs2Ed1KF3ulAOA9H1xG0]]></MediaId><Title><![CDATA[testCallBackReplyVideo]]></Title><Description><![CDATA[testCallBackReplyVideo]]></Description></Video></xml>";
	String afterAesEncrypt2 = "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";

	@BeforeClass
	public static void setUpBeforeClass() throws Exception {
	}

	@AfterClass
	public static void tearDownAfterClass() throws Exception {
	}

	@Before
	public void setUp() throws Exception {

	}

	@After
	public void tearDown() throws Exception {
	}

	@Test
	public void testNormal() throws ParserConfigurationException, SAXException, IOException {
		try {
			WXBizMsgCrypt pc = new WXBizMsgCrypt(token, encodingAesKey, corpId);
			String afterEncrpt = pc.EncryptMsg(replyMsg, timestamp, nonce);

			DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
			DocumentBuilder db = dbf.newDocumentBuilder();
			StringReader sr = new StringReader(afterEncrpt);
			InputSource is = new InputSource(sr);
			Document document = db.parse(is);

			Element root = document.getDocumentElement();
			NodeList nodelist1 = root.getElementsByTagName("Encrypt");
			NodeList nodelist2 = root.getElementsByTagName("MsgSignature");

			String encrypt = nodelist1.item(0).getTextContent();
			String msgSignature = nodelist2.item(0).getTextContent();
			String fromXML = String.format(xmlFormat, encrypt);

			// 第三方收到公众号平台发送的消息
			String afterDecrpt = pc.DecryptMsg(msgSignature, timestamp, nonce, fromXML);
			assertEquals(replyMsg, afterDecrpt);
		} catch (AesException e) {
			fail("正常流程，怎么就抛出异常了？？？？？？");
		}
	}

	@Test
	public void testAesEncrypt() {
		try {
			WXBizMsgCrypt pc = new WXBizMsgCrypt(token, encodingAesKey, corpId);
			assertEquals(afterAesEncrypt, pc.encrypt(randomStr, replyMsg));
		} catch (AesException e) {
			e.printStackTrace();
			fail("no异常");
		}
	}

	@Test
	public void testAesEncrypt2() {
		try {
			WXBizMsgCrypt pc = new WXBizMsgCrypt(token, encodingAesKey, corpId);
			assertEquals(afterAesEncrypt2, pc.encrypt(randomStr, replyMsg2));

		} catch (AesException e) {
			e.printStackTrace();
			fail("no异常");
		}
	}

	@Test
	public void testIllegalAesKey() {
		try {
			new WXBizMsgCrypt(token, "abcde", corpId);
		} catch (AesException e) {
			assertEquals(AesException.IllegalAesKey, e.getCode());
			return;
		}
		fail("错误流程不抛出异常？？？");
	}

	@Test
	public void testValidateSignatureError() throws ParserConfigurationException, SAXException, IOException {
		try {
			WXBizMsgCrypt pc = new WXBizMsgCrypt(token, encodingAesKey, corpId);
			String afterEncrpt = pc.EncryptMsg(replyMsg, timestamp, nonce);
			DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
			DocumentBuilder db = dbf.newDocumentBuilder();
			StringReader sr = new StringReader(afterEncrpt);
			InputSource is = new InputSource(sr);
			Document document = db.parse(is);

			Element root = document.getDocumentElement();
			NodeList nodelist1 = root.getElementsByTagName("Encrypt");

			String encrypt = nodelist1.item(0).getTextContent();
			String fromXML = String.format(xmlFormat, encrypt);
			pc.DecryptMsg("12345", timestamp, nonce, fromXML); // 这里签名错误
		} catch (AesException e) {
			assertEquals(AesException.ValidateSignatureError, e.getCode());
			return;
		}
		fail("错误流程不抛出异常？？？");
	}

	@Test
	public void testVerifyUrl() throws AesException {
		WXBizMsgCrypt wxcpt = new WXBizMsgCrypt("QDG6eK", "jWmYm7qr5nMoAUwZRjGtBxmz3KA1tkAj3ykkR6q2B2C",
				"wx5823bf96d3bd56c7");
		String verifyMsgSig = "5c45ff5e21c57e6ad56bac8758b79b1d9ac89fd3";
		String timeStamp = "1409659589";
		String nonce = "263014780";
		String echoStr = "P9nAzCzyDtyTWESHep1vC5X9xho/qYX3Zpb4yKa9SKld1DsH3Iyt3tP3zNdtp+4RPcs8TgAE7OaBO+FZXvnaqQ==";
		wxcpt.VerifyURL(verifyMsgSig, timeStamp, nonce, echoStr);
		// 只要不抛出异常就好
	}
}