package com.nationalelectric.greenH5.identityAuth.util;

import com.nationalelectric.greenH5.identityAuth.util.devon.Assertion;
import com.nationalelectric.greenH5.identityAuth.util.devon.secure.Md5Utils;

import javax.servlet.http.HttpServletRequest;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.TreeMap;

/**
 * HMAC:  upperCase(hash(urlEncode(query + "&appKey=MyAppKey", "UTF-8")))
 *
 * @author <a href="mailto:93785732@qq.com">ZhengDaHong@fzfx</a>
 * @since 2018/1/31 17:02
 * @see javax.crypto.Mac Don't use Java standard algorithmn, because of not in favor of cross-platform
 */
// TODO: 2018/4/3 Add 'timestamp' factor to expiration validation
//public abstract class SignatureUtils {
public class SignatureUtils2 {
	private static final String ENCODING = "UTF-8";

	static final String PARAMETER_SIGNATURE = "signature";

	static final String PARAMETER_SIGNATURE_TYPE = "signatureType";

	private static final String[] NON_SIGNATURE_FACTORS = {
			PARAMETER_SIGNATURE
	};

	

	
	
	public static String aaa(){
		return "aaa";
	}
	
	/**
	 * Convenience method for {@link #buildSignature(TreeMap, String, SignatureType)} to accepting any {@code Map}s
	 * @since 2018/04/19 11:42
	 */
	public static String buildSignature2(Map<String, String> orderingMap, String appKey, String signatureType) throws Exception {
		System.out.println("10000000000000000");
		TreeMap<String, String> orderingMapToUse;
		System.out.println("123333334354ty53uterhfgsd");
		if(orderingMap instanceof TreeMap){
			System.out.println(";lkjhgfdsadfghgf");
			orderingMapToUse = (TreeMap<String, String>) orderingMap;
		}
		else{
			System.out.println("auisldasdkasfsjk");
			orderingMapToUse = new TreeMap<String, String>(orderingMap);
		}
//		return buildSignature3(orderingMapToUse, appKey, signatureType);
		return buildSignature4(orderingMapToUse, appKey, signatureType);
//		return aaa();
	}
	
	public static String buildSignature4(TreeMap<String, String> orderingMap, String appKey, String signatureType) {
		StringBuilder stringToSign = new StringBuilder(orderingMap.size() * 10);
		boolean first = true;
		outer: for (Map.Entry<String, String> entry : orderingMap.entrySet()) {
			for (String nonSignatureFactor : NON_SIGNATURE_FACTORS) {
				if(nonSignatureFactor.equals(entry.getKey())){
					continue outer;
				}
			}

			if(!first){
				stringToSign.append('&');
			}else{
				first = false;
			}

			stringToSign.append(entry.getKey()).append('=').append(entry.getValue());
		}
		stringToSign.append("&appKey=").append(appKey);

		try {
			// 通过URL-encoding得到ASCII字符(兼容)，因此不惧在任何时候的getBytes()
			return Md5Utils.md5WithUpperCase(URLEncoder.encode(stringToSign.toString(), ENCODING));
		} catch (Exception impossible) {
			return null;
		}
		
		
		
	}
	
	public static String buildSignature3(TreeMap<String, String> orderingMap, String appKey, String signatureType) {
		StringBuilder stringToSign = new StringBuilder(orderingMap.size() * 10);
		boolean first = true;
		outer: for (Map.Entry<String, String> entry : orderingMap.entrySet()) {
			for (String nonSignatureFactor : NON_SIGNATURE_FACTORS) {
				if(nonSignatureFactor.equals(entry.getKey())){
					continue outer;
				}
			}

			if(!first){
				stringToSign.append('&');
			}else{
				first = false;
			}

			stringToSign.append(entry.getKey()).append('=').append(entry.getValue());
		}
		stringToSign.append("&appKey=").append(appKey);

		switch (signatureType){
			case "MD5":{
				try {
					// 通过URL-encoding得到ASCII字符(兼容)，因此不惧在任何时候的getBytes()
					return Md5Utils.md5WithUpperCase(URLEncoder.encode(stringToSign.toString(), ENCODING));
				} catch (UnsupportedEncodingException impossible) {
				}
			}
			default: return null;
		}
	}

	

}