package com.eactive.ext.djb.ums;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.Charset;
import java.security.SecureRandom;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Random;

import org.apache.commons.lang3.StringUtils;
import org.apache.hc.client5.http.config.RequestConfig;
import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
import org.apache.hc.client5.http.impl.classic.HttpClients;
import org.apache.hc.core5.util.Timeout;

import com.eactive.apim.portal.template.entity.MessageCode;
import com.eactive.apim.portal.template.entity.MessageRequest;
import com.eactive.ext.kjb.common.KjbProperty;
import com.eactive.ext.kjb.common.KjbPropertyHolder;
import com.google.gson.Gson;

import lombok.extern.slf4j.Slf4j;

@Slf4j
public class DjbMessengerService {
    public final static int[] ALLOW_CHANNELS = { MessageCode.Channels.MESSENGER.getValue() };

    private static final Gson gson = new Gson();
    
    private static volatile DjbMessengerService instance;
    

    private DjbMessengerService() {
        // 싱글톤
    }

    public static DjbMessengerService getInstance() {
        if (instance == null) {
            synchronized (DjbMessengerService.class) {
                if (instance == null) {
                    instance = new DjbMessengerService();
                }
            }
        }
        return instance;
    }

    private KjbProperty getProperty() {
        return KjbPropertyHolder.get();
    }

    private boolean isRealMode() {
        String url = getProperty().getUmsHostUrl();
        return url != null && StringUtils.isNotEmpty(url.trim());
    }

    private CloseableHttpClient createHttpClient() {
        return HttpClients.createDefault();
    }

    private RequestConfig createRequestConfig() {
        KjbProperty prop = getProperty();
        return RequestConfig.custom()
                .setConnectTimeout(Timeout.ofSeconds(prop.getUmsConnectionTimeout()))
                .setResponseTimeout(Timeout.ofSeconds(prop.getUmsResponseTimeout()))
                .build();
    }

    public static boolean isAllowChannel(MessageRequest message) {
        for (int channel : ALLOW_CHANNELS) {
            if ((message.getMessageCode().getChannels() & channel) == channel) {
                return true;
            }
        }
        return false;
    }


    public boolean send(MessageRequest messageRequest) throws Exception {
        if (messageRequest == null) {
            throw new IllegalArgumentException("messageRequest is null");
        }

        if (MessageCode.Channels.MESSENGER.getValue() != (messageRequest.getMessageCode().getChannels() & MessageCode.Channels.MESSENGER.getValue())) {
            log.error("지원하지 않는 발송 채널 - {}", messageRequest.getMessageCode().toString());
            throw new IllegalArgumentException("지원하지 않는 발송 채널 - " + messageRequest.getMessageCode().toString());
        }

        this.httpConnection(messageRequest);

        return true;
    }


    private void httpConnection(MessageRequest messageRequest) throws Exception {
    	
    	KjbProperty prop = getProperty(); 
        
        URL url = new URL(prop.getSwingUrl());
        int timeoutValue = 5 * 1000; // 타임아웃 설정을 위한 값 (단위: ms)
        // Charset charset = Charset.forName("UTF-8");
		Charset charset = Charset.forName("MS949");
		HttpURLConnection conn = null;
		BufferedReader br = null;
		StringBuffer sb = null;
		String bodyData = this.makeBodyData(messageRequest);
		
		String responseData = "";
		String method = bodyData != "" ? "POST" : "GET";
		conn = (HttpURLConnection) url.openConnection();
		conn.setRequestMethod(method); // 전송방식
		// conn.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
		conn.setRequestProperty("Content-Type", "application/json; charset=MS949");
		conn.setConnectTimeout(timeoutValue); // 연결 타임아웃 설정(5초)
		conn.setReadTimeout(timeoutValue); // 읽기 타임아웃 설정(5초)
		conn.setDoOutput(true);
		
		// POst 방식인 경우에만
		if (method.equals("POST")) {
			OutputStream os = conn.getOutputStream();
			byte requestData[] = bodyData.getBytes(charset);
			os.write(requestData);
			os.close();
		}
//		System.out.println("getContentType():"t conn.getContentType());
//		System,out.println("getResponseCode();" t conn.getResponseCode());
//		System.out.println("getResponseMessage();" + conn.getResponseMessage());
		if (log.isDebugEnabled()) {
			log.debug("getContentType();" + conn.getContentType()); // 응답 콘텐츠 유형 구하기
			log.debug("getResponsecode();" + conn.getResponseCode()); // 응답 코드 구하기
			log.debug("getResponseMessage():" + conn.getResponseMessage()); // 응답 메세지 구하기
    	}
		
		
		// http 요청 후 응답 받은 데이타를 버퍼에 쌓는다
		if (conn.getResponseCode() >= 200 && conn.getResponseCode() <= 300) {
			br = new BufferedReader(new InputStreamReader(conn.getInputStream(), charset));
		} else {
			br = new BufferedReader(new InputStreamReader(conn.getErrorStream(), charset));
		}
		
		String inputLine;
		sb = new StringBuffer();
		while ((inputLine = br.readLine()) != null) {
			sb.append(inputLine);
		}
		
		responseData = sb.toString();
		
		// http 요청 및 응답 완료 후 BufferedReader를 닫는다
		if (br != null) {
			br.close();
			conn.disconnect();
		}
	}
    
    
    private String makeBodyData(MessageRequest messageRequest) {
    	
    	KjbProperty prop = getProperty(); 
    	
    	// 리턴값
    	String rtnVal = "";
    	
    	// 스윙챗 알림 헤더
    	SwingHeadVO swiHeadVO = new SwingHeadVO();
    	
    	// 스윙챗 알림 공용
    	SwingCommonVO swiComVO = new SwingCommonVO();
    	
    	// 스윙챗 알림 데이터
    	SwingDataVO swiDataVO = new SwingDataVO();
    	
    	// 스윙챗 알림 데이터
    	List<SwingReceiverDataVO> swiReDataVOList = new ArrayList<SwingReceiverDataVO>();
    	    	
    	// guID 및 날짜 시간 정보
    	String jsonData[] = this.makeJsonDataInfo();
    	
    	// 스윙챗 알림 헤더 설정
    	swiHeadVO.setNxgn_stnd_idfr("JERA");
    	swiHeadVO.setGuid(jsonData[2]);
    	swiHeadVO.setGuid_prgs_no("1");
    	swiHeadVO.setStnd_mesg_ver("R10");
    	swiHeadVO.setOrtr_guid(jsonData[2]);
    	swiHeadVO.setSect_ecrpt_yn("N");
    	swiHeadVO.setFrst_trnm_ipad(prop.getSwingWasIpAddress());
    	swiHeadVO.setFrst_trnm_ipv4_addr(prop.getSwingWasIpAddress());
    	swiHeadVO.setFrst_trnm_mac(prop.getSwingMacIpAddress());
    	swiHeadVO.setFrst_mesg_dman_dt(jsonData[0]);
    	swiHeadVO.setFrst_mesg_dman_time(jsonData[1]);
    	swiHeadVO.setFrst_trnm_sys_dvcd("EBG");
    	swiHeadVO.setTrnm_sys_dvcd("FEP");
    	swiHeadVO.setDman_rspn_dvcd("S");
    	swiHeadVO.setSys_env_dvcd("TODO: 설정값 확인 할것!!!");	//TODO: EgovPropertiesUtils.getOptionalProp("SYS_ENV_DVCD"));
    	swiHeadVO.setTx_tycd("0");
    	swiHeadVO.setSynz_dvcd("S");
    	swiHeadVO.setTx_id("MSGSENDMSG1S");
    	swiHeadVO.setXtis_cd(null);
    	swiHeadVO.setOsdch_dvcd(null);
    	swiHeadVO.setChnl_tycd("FEP");
    	swiHeadVO.setIf_id("F2HMPSHGMSGSENDMSG1S");
    	swiHeadVO.setHmab_dvcd("2");
    	swiHeadVO.setTx_brcd("157");
    	swiHeadVO.setTlrno("ET0001");
    	swiHeadVO.setInsl_brcd("157");
    	swiHeadVO.setBlng_brcd("157");
    	swiHeadVO.setMgmt_brcd("157");
    	swiComVO.setClientld(prop.getSwingClientId());
    	swiComVO.setClientSecret(prop.getSwingClientSecret());
    	swiComVO.setCompanyCode("CB");

    	// 랜던값(26)
    	String random26 = this.genrateRandomStringNumber26();
    	swiComVO.setRequestUniqueKey(random26);
    	swiDataVO.setNotiCode("CNO_FEP_HMP_0002");
    	swiDataVO.setNotiTitle("알림");
    	swiDataVO.setNotiContent(messageRequest.getMessage());
    	
    	SwingReceiverDataVO receiver = new SwingReceiverDataVO();
    	receiver.setCode(messageRequest.getMessengerId());
    	swiReDataVOList.add(receiver);
    	
    	swiDataVO.setReceiverInfo(swiReDataVOList);
    	
    	String header = gson.toJson(swiHeadVO);
    	String common = gson.toJson(swiComVO);
    	String data = gson.toJson(swiDataVO);
    	
    	// 헤더 + 데이터
    	rtnVal = "{\"HEAD\":" + header + "    ,\r\n" + "\"DATA\":\r\n" + "    [" + "{\r\n"
    				+ "    \"data_dvcd\":\"IO\", \r\n" + "    \"BIZ_DATA\":\r\n" + "    {\r\n"
    				+ "            \"common\":\r\n" + common + ",\r\n" + "      \"data\":" + data
    				+ "    }\r\n" + "         }\r\n" + " ]\r\n" + "}";
    	
    	log.debug(rtnVal);
    	
    	return rtnVal;
    }
    
    private String[] makeJsonDataInfo() {
    	// 리턴값
    	String rtnVal[] = new String[3];
    	
    	// 현재시간
    	Date currentDate = new Date();
    	
    	SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmssSSS");
    	String formattedDate = sdf.format(currentDate);
    	
    	rtnVal[0] = formattedDate.substring(0,8);
    	rtnVal[1] = formattedDate.substring(8);
    	
    	// 랜던값
    	String random20 = this.genrateRandomStringNumber20();
    	
    	rtnVal[2] = formattedDate  + "HMP" + random20;
    	
    	return rtnVal;
    }
    
    
    private String genrateRandomStringNumber20() {
	    String rtnVal= "";
	    
	    StringBuilder buffer= new StringBuilder(10);
	    
	    // 랜덤값
	    String characters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
	    
	    // 랜덤객체 생성
	    SecureRandom random = new SecureRandom();
	    
	    // 반복문
	    for (int i= 0;i< 10;i++) {
	    	// 랜덤수
	    	int randomIndex = random.nextInt(characters.length());
	    	
	    	// 생성된 랜덤값
	    	char randomChar = characters.charAt(randomIndex);
	    
	    	// 랜덤값 저장
	    	buffer.append(randomChar);
	    }
	    	
    	// 랜덤객체 재생성
    	random = new SecureRandom();
    	
	    // 난수 10개 생성
	    int random10 = (int) (Math.pow(10, 9) + random.nextDouble() * Math.pow(10, 9));
	    
	    // 문자 숫자 조합(10) + 숫자(10)
	    rtnVal = buffer.toString() + Integer.toString(random10);
	    
	    //리턴
	    return rtnVal;
	}
    
    private String genrateRandomStringNumber26() {
		String rtnVal = "";
		
		// 리턴값
		StringBuilder buffer = new StringBuilder(26);
		
		String characters = "abcdefghijklmnopqrstuvwxyzABCDEFGHJKLMNOPQRSTUVWXYZ0123456789";
		
		// 랜덤객체 생성
		Random random = new Random();
		
		//반복문
		for (int i= 0; i < 26; i++) {
			// 랜덤수
			int randomIndex = random.nextInt(characters.length());
			// 생성된 랜덤값
			char randomChar = characters.charAt(randomIndex);
			// 랜덤값 저장
			buffer.append(randomChar);
		}
		
		// 문자 숫자 조합(26)
		rtnVal= buffer.toString();
		
		// 리턴
		return rtnVal;
    }
}