package com.pollex.pam.service;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.pollex.pam.config.ApplicationProperties;
import com.pollex.pam.config.ApplicationProperties.Email;
import com.pollex.pam.config.ApplicationProperties.SMS;
import com.pollex.pam.config.Constants;
import com.pollex.pam.enums.SendEmailMsgMethod;
import com.pollex.pam.repository.ConsultantRepository;
import com.pollex.pam.service.dto.*;
import com.pollex.pam.service.util.HttpRequestUtil;
import com.pollex.pam.web.rest.errors.SendEmailFailException;
import com.pollex.pam.web.rest.errors.SendSMSFailException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.env.Environment;
import org.springframework.core.env.Profiles;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Service;
import org.thymeleaf.spring5.SpringTemplateEngine;
import tech.jhipster.config.JHipsterConstants;

import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.*;
import java.util.Base64.Encoder;

@Service
public class SendMsgService {

    private static final Logger log = LoggerFactory.getLogger(SendMsgService.class);
    private final Encoder encoder = Base64.getEncoder();

    private static final String SEND_SMS_SUCCESS_CODE = "1";

    @Autowired
    ApplicationProperties applicationProperties;

    @Autowired
    ConsultantRepository consultantRepository;

    @Autowired
    SpringTemplateEngine springTemplateEngine;

    @Autowired
    Environment environment;

    @Autowired
    MailService mailService;

    public SendSMSResponse sendMsgBySMS(String toMobile, String content) throws SendSMSFailException {

        SMS smsProperties = applicationProperties.getSms();
        if(!smsProperties.isSendNotifyMsg()) {
//    		return getMockSMSResponse();
            return null;
        }

        SendSMSRequest sendSMSRequest = new SendSMSRequest();
        sendSMSRequest.setpKey(UUID.randomUUID().toString());
        sendSMSRequest.setSourceCode(smsProperties.getSourceCode());
        sendSMSRequest.setSender(smsProperties.getSender());
        sendSMSRequest.setMsgTypeSet(smsProperties.getSmsType());
        sendSMSRequest.setSendTime(LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:00")));
        sendSMSRequest.setSubject(encoder.encodeToString(smsProperties.getSubject().getBytes(StandardCharsets.UTF_8)));
        sendSMSRequest.setActivityId("");

        SMSDetail smsDetail = new SMSDetail();
        smsDetail.setMobile(toMobile);
        smsDetail.setContent(encoder.encodeToString(content.getBytes(StandardCharsets.UTF_8)));

        sendSMSRequest.setDetail(Collections.singletonList(smsDetail));

        try {
            ResponseEntity<SendSMSResponse> responseEntity = HttpRequestUtil.postWithJson(smsProperties.getUrl(), sendSMSRequest, SendSMSResponse.class);
            SendSMSResponse response = responseEntity.getBody();

            log.debug("response status code = {}", responseEntity.getStatusCode());
            log.debug("smsResponse = {}", responseEntity.getBody());

            if(!SEND_SMS_SUCCESS_CODE.equals(response.getReturnCode())) {
                throw new SendSMSFailException("sms service return code = " + response.getReturnCode() + ", error_msg = " + response.getErrorMsg());
            }

            return responseEntity.getBody();
        } catch (SendSMSFailException e) {
            throw e;
        } catch (Exception e) {
            log.warn("send sms fail by other reason!", e);
            throw new SendSMSFailException("send sms fail by other reason!");
        }
    }

//    private SendSMSResponse getMockSMSResponse() {
//    	SendSMSResponse mock = new SendSMSResponse();
//    	mock.set
//		return null;
//	}

	public String sendMsgByEmail(String to, String subject, String content, boolean htmlFormat) throws SendEmailFailException{
        return sendMsgByEmail(to, subject, content, htmlFormat, Collections.emptyList(), Collections.emptyList());
    }

    public String sendMsgByEmail(String toAddress, String subject, String content, boolean htmlFormat, List<String> toCCAddress,
        List<String> attachments) throws SendEmailFailException {
    	String fromAddress = applicationProperties.getEmail().getSenderEmail();

        SendMailRequest sendMailRequest = new SendMailRequest();
        sendMailRequest.setSendMailAddresses(Collections.singletonList(toAddress));
        sendMailRequest.setFrom(fromAddress);
        sendMailRequest.setContent(content);
        sendMailRequest.setSubject(subject);
        sendMailRequest.setSendCCMailAddresses(toCCAddress);
        sendMailRequest.setAttachments(attachments);
        sendMailRequest.setHtmlFormat(htmlFormat);
        sendMailRequest.setFunctionId(applicationProperties.getEmail().getFunctionId());

        return sendMsgByEmail(sendMailRequest);
    }

    public String sendMsgByEmail(SendMailRequest sendMailRequest) throws SendEmailFailException{
        final Email emailProperties = applicationProperties.getEmail();

        if(!emailProperties.isSendNotifyMsg()) {
            return null;
        }

        if(emailProperties.getMethod() == SendEmailMsgMethod.POLLEX_GMAIL) {
            return sendMsgByPollexGmail(sendMailRequest);
        }
        else if(emailProperties.getMethod() == SendEmailMsgMethod.PAM_EMAIL_SERVICE) {
            return sendMsgByPamEmailService(sendMailRequest);
        }

        return null;
    }

    private String sendMsgByPollexGmail(SendMailRequest sendMailRequest) {
        String subject = sendMailRequest.getSubject();
        String content = sendMailRequest.getContent();
        boolean isHtml = sendMailRequest.isHtmlFormat();
        sendMailRequest.getSendMailAddresses().forEach(receiver -> mailService.sendEmail(receiver, subject, content, false, isHtml));

        return null;
    }

    private String sendMsgByPamEmailService(SendMailRequest sendMailRequest) {
        final Email emailProperties = applicationProperties.getEmail();
        try {
            ResponseEntity<String> responseEntity =
                HttpRequestUtil.postWithJson(emailProperties.getUrl(), sendMailRequest, String.class);
            log.debug("responseEntity = {}", responseEntity);

            String rawResponseString = responseEntity.getBody();
            SendMailResponse sendMailResponse = new ObjectMapper().readValue(rawResponseString, SendMailResponse.class);
            log.debug("sendMailResponse = {}", sendMailResponse);

            if (sendMailResponse == null || sendMailResponse.getData() == null || !"ADDED".equalsIgnoreCase(sendMailResponse.getData().getMessageStatus())) {
                throw new SendEmailFailException("send email service return error msg! raw response string= " + rawResponseString);
            }

            return responseEntity.getBody();
        } catch (SendEmailFailException e) {
            throw e;
        } catch (Exception e) {
            log.warn("send email fail by other reason", e);
            throw new SendEmailFailException("send email failed!");
        }
    }
}