package com.pollex.pam.service;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.pollex.pam.config.ApplicationProperties;
import com.pollex.pam.config.ApplicationProperties.SMS;
import com.pollex.pam.domain.Appointment;
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 io.jsonwebtoken.lang.Assert;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;
import org.thymeleaf.context.Context;
import org.thymeleaf.spring5.SpringTemplateEngine;

import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Base64;
import java.util.Base64.Encoder;
import java.util.Collections;
import java.util.List;
import java.util.UUID;

@Service
public class SendMsgService {

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

    private static final String EMAIL_SUBJECT = "保誠媒合平台系統通知：新預約單";

    @Autowired
    ApplicationProperties applicationProperties;

    @Autowired
    ConsultantRepository consultantRepository;

    @Autowired
    SpringTemplateEngine springTemplateEngine;

    public void sendAppointmentNotify(Appointment appointment) {
        Assert.notNull(appointment);

        log.debug("is need sending notify msg = {}", applicationProperties.isSendNotifyMsg());
        if(applicationProperties.isSendNotifyMsg()) {
            log.debug("sending appointment notify, appointmentId = {}", appointment.getId());
            sendAppointmentNotifyBySMS(appointment);
            sendAppointmentNotifyByEmail(appointment);

            // todo 需確認保誠是否有需求使用html mail
            // sendAppointmentNotifyByHtmlEmail(appointment);
        }
    }

    private void sendAppointmentNotifyBySMS(Appointment appointment) throws SendSMSFailException {
        String msg = getAppointmentNotifyWording(appointment);
        String consultantMobile = consultantRepository.findOneByAgentNo(appointment.getAgentNo()).get().getPhoneNumber();

        try {
            sendMsgBySMS(consultantMobile, msg);
        } catch (SendSMSFailException e) {
            log.debug("send sms failed, appointment Id = {}", appointment.getId(), e);
        }
    }

    private void sendAppointmentNotifyByEmail(Appointment appointment) {
        // todo 需得知保誠系統寄件信箱 (並改於設定檔中)
        String senderEmail = applicationProperties.getEmail().getSenderEmail();
        String consultantEmail = consultantRepository.findOneByAgentNo(appointment.getAgentNo()).get().getEmail();
        String content = getAppointmentNotifyWording(appointment);

        try {
            sendMsgByEmail(senderEmail, consultantEmail, EMAIL_SUBJECT, content, false);
        } catch (SendEmailFailException e) {
            log.debug("send email failed, appointment Id = {}", appointment.getId(), e);
        }
    }

    private void sendAppointmentNotifyByHtmlEmail(Appointment appointment) {
        // todo 需得知保誠系統寄件信箱 (並改於設定檔中)
        String senderEmail = applicationProperties.getEmail().getSenderEmail();
        String consultantEmail = consultantRepository.findOneByAgentNo(appointment.getAgentNo()).get().getEmail();
        String customerMobile = appointment.getPhone();
        String normalContent;

        if(StringUtils.hasText(customerMobile)) {
            normalContent = "親愛的顧問您好，您有一筆來自保誠媒合平台的新預約單，該客戶手機號碼為" + customerMobile + "\n";
        }
        else {
            normalContent = "親愛的顧問您好，您有一筆來自保誠媒合平台的新預約單\n";
        }

        Context context = new Context();
        context.setVariable("content", normalContent);
        context.setVariable("urlHint", getAppointmentDetailUrl(appointment.getId()));
        String content = springTemplateEngine.process("mail/appointmentNotifyEmail", context);

        try {
            sendMsgByEmail(senderEmail, consultantEmail, EMAIL_SUBJECT, content, true);
        } catch (SendEmailFailException e) {
            log.debug("send email failed, appointment Id = {}", appointment.getId(), e);
        }
    }

    private String getAppointmentNotifyWording(Appointment appointment) {
        String normalContent;
        if(StringUtils.hasText(appointment.getPhone())) {
            normalContent = "親愛的顧問您好，您有一筆來自保誠媒合平台的新預約單，該客戶手機號碼為" + appointment.getPhone() + "\n";
        }
        else {
            normalContent = "親愛的顧問您好，您有一筆來自保誠媒合平台的新預約單\n";
        }

        String urlContent = "點擊網址：" + getAppointmentDetailUrl(appointment.getId()) + " 開啟媒合平台查看。";
        return normalContent + urlContent;
    }

    public SendSMSResponse sendMsgBySMS(String toMobile, String content) throws SendSMSFailException {
        SMS smsProperties = applicationProperties.getSms();

        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("");
        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);

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

            return responseEntity.getBody();
            // todo 可能需要再補上後續錯誤處理，但要先測通
        }
        catch (Exception e) {
            log.debug("send sms failed!", e);
            throw new SendSMSFailException();
        }
    }

    public String sendMsgByHtmlTestTemplateEmail(String from, String to) {
        Context context = new Context();
        context.setVariable("content", "親愛的顧問您好，您有一筆來自保誠媒合平台的新預約單\n");
        context.setVariable("urlHint", getAppointmentDetailUrl(0L));

        String content = springTemplateEngine.process("mail/appointmentNotifyEmail", context);
        return sendMsgByEmail(from, to, EMAIL_SUBJECT, content, true);
    }

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

    public String sendMsgByEmail(
        String fromAddress, String toAddress, String subject, String content, boolean htmlFormat, List<String> toCCAddress,
        List<String> attachments) throws SendEmailFailException
    {
        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);
    }

    private String sendMsgByEmail(SendMailRequest sendMailRequest) throws SendEmailFailException{
        try {
            ResponseEntity<String> responseEntity =
                HttpRequestUtil.postWithJson( applicationProperties.getEmail().getUrl(), sendMailRequest, String.class);
            log.debug("responseEntity = {}", responseEntity);

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

//            if(sendMailResponse == null || sendMailResponse.getData() == null || "ADDED".equalsIgnoreCase(sendMailResponse.getData().getMessageStatus())) {
//                throw new SendEmailFailException();
//            }

            return responseEntity.getBody();
        }
        catch (SendEmailFailException e) {
            throw e;
        }
        catch (Exception e) {
            log.debug("send email failed!", e);
            throw new SendEmailFailException();
        }
    }

    private String getAppointmentDetailUrl(Long appointmentId) {
        return applicationProperties.getFrontEndDomain() + "/myAppointmentList/contactedList?appointmentId=" + appointmentId;
    }
}