package com.pollex.pam.web.rest;

import java.util.Arrays;
import java.util.UUID;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.pollex.pam.business.aop.logging.audit.AuditLoggingInject;
import com.pollex.pam.business.domain.Consultant;
import com.pollex.pam.business.security.token.EServiceAuthenticationToken;
import com.pollex.pam.business.service.ConsultantService;
import com.pollex.pam.business.web.vm.EServiceLoginVM;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.pollex.pam.config.ApplicationProperties;
import com.pollex.pam.business.domain.Customer;
import com.pollex.pam.business.enums.OtpLoginTypeEnum;
import com.pollex.pam.business.repository.CustomerRepository;
import com.pollex.pam.security.jwt.JWTFilter;
import com.pollex.pam.security.jwt.TokenProvider;
import com.pollex.pam.service.CustomerAuthService;
import com.pollex.pam.service.CustomerService;
import com.pollex.pam.business.service.OtpTmpService;
import com.pollex.pam.service.OtpUtilService;
import com.pollex.pam.service.OtpWebService;
import com.pollex.pam.business.service.dto.CustomerRegisterDTO;
import com.pollex.pam.business.service.dto.OtpResponseDTO;
import com.pollex.pam.business.web.errors.OtpLoginFailException;
import com.pollex.pam.business.web.vm.OtpLoginVM;
import com.pollex.pam.business.web.vm.VerifyOtpVM;

import static com.pollex.pam.business.aop.logging.audit.AuditLoggingType.CONSULTANT_LOGIN;
import static com.pollex.pam.business.aop.logging.audit.AuditLoggingType.CUSTOMER_LOGIN;

@RestController
@RequestMapping("/api/otp")
public class OtpResource {

    private final static Logger log = LoggerFactory.getLogger(OtpResource.class);

    @Autowired
    ApplicationProperties applicationProperty;

    @Autowired
    OtpWebService otpWebService;

    @Autowired
    AuthenticationManagerBuilder authenticationManagerBuilder;

    @Autowired
    TokenProvider tokenProvider;

    @Autowired
    CustomerAuthService customerAuthService;

    @Autowired
    OtpTmpService otpTmpService;

    @Autowired
    CustomerService customerService;

    @Autowired
    OtpUtilService otpUtilService;

    @Autowired
    CustomerRepository customerRepository;

    @Autowired
    ConsultantService consultantService;

    @PostMapping("/sendOtp/{imgCode}")
    public ResponseEntity<Object> sendOtp(@RequestBody OtpLoginVM login
    		, @PathVariable String imgCode, HttpServletRequest request) {

    	HttpSession session = request.getSession();
    	String sessionImpCode = (String) session.getAttribute("img_code");

    	if (!StringUtils.hasText(sessionImpCode)
				|| !StringUtils.hasText(imgCode)) {
    		throw new OtpLoginFailException("驗證碼輸入錯誤");
		}

    	if(!imgCode.equals(sessionImpCode)) {
    		throw new OtpLoginFailException("驗證碼輸入錯誤");
    	}

    	session.setAttribute("img_code", null);

    	OtpResponseDTO otpResponse;
        if(applicationProperty.isMockLogin()) {
            otpResponse = getMockSendOtpResponse();
        }else if(login.getLoginType() == OtpLoginTypeEnum.SMS) {
            otpResponse = otpWebService.sendByPhone(login.getAccount());
        }
        else if(login.getLoginType() == OtpLoginTypeEnum.EMAIL) {
            otpResponse = otpWebService.sendByEmail(login.getAccount());
        }else {
            return ResponseEntity.status(HttpStatus.BAD_REQUEST).body("can not support this login type, loginType = " + login.getLoginType().name());
        }
        otpTmpService.createOtpTmp(login.getAccount(), otpResponse.getIndexKey());

        return new ResponseEntity<>(otpResponse, HttpStatus.OK);
    }

    @AuditLoggingInject(type = CUSTOMER_LOGIN)
    @PostMapping("/verify")
    public ResponseEntity<UserJWTController.JWTToken> verifyOtp(@RequestBody VerifyOtpVM verifyOtpParam
    		) {

    	otpUtilService.verifyOtp(verifyOtpParam);

    	Customer customer = customerRepository
    						.findOneByEmailEqualsOrPhoneEquals(verifyOtpParam.getAccount())
    						.orElse(null);

    	if (customer == null) {
    		return ResponseEntity.status(HttpStatus.FORBIDDEN).build();
    	}

    	String jwt = customerAuthService.authorize(customer, verifyOtpParam.getIndexKey(), verifyOtpParam.getOtpCode());
        HttpHeaders httpHeaders = new HttpHeaders();
        httpHeaders.add(JWTFilter.AUTHORIZATION_HEADER, "Bearer" + jwt);
        return new ResponseEntity<>(new UserJWTController.JWTToken(jwt), httpHeaders, HttpStatus.OK);
    }

    private OtpResponseDTO getMockSendOtpResponse() {
        String indexKey = UUID.randomUUID().toString().substring(0, 8);
        return new OtpResponseDTO(Arrays.asList(indexKey, "0", "", ""));
    }

    @PostMapping("/register")
    public ResponseEntity<UserJWTController.JWTToken> registerAccount(@RequestBody CustomerRegisterDTO registDTO) {
    	Customer account = customerService.registerCustomer(registDTO);
    	String jwt = customerAuthService.authorize(account, registDTO.getIndexKey(), registDTO.getOtpCode());
    	HttpHeaders httpHeaders = new HttpHeaders();
        httpHeaders.add(JWTFilter.AUTHORIZATION_HEADER, "Bearer" + jwt);
        return new ResponseEntity<>(new UserJWTController.JWTToken(jwt), httpHeaders, HttpStatus.OK);
    }

    @PostMapping("/consultant/sendOtp/{login}")
    public ResponseEntity<Object> consultantSendOtp(@PathVariable String login) {
        Consultant consultant = consultantService.findByAgentNo(login);
        OtpResponseDTO otpResponse;
        if(applicationProperty.isMockLogin()) {
            otpResponse = getMockSendOtpResponse();
        }else if(StringUtils.hasText(consultant.getPhoneNumber())) {
            otpResponse = otpWebService.sendByPhone(consultant.getPhoneNumber());
        }else if(StringUtils.hasText(consultant.getEmail())) {
            otpResponse = otpWebService.sendByEmail(consultant.getEmail());
        }else {
            return ResponseEntity.status(HttpStatus.BAD_REQUEST).body("can not find phone and email to send otp, loginType = " + login);
        }
        otpTmpService.createOtpTmp(login, otpResponse.getIndexKey());

        return new ResponseEntity<>(otpResponse, HttpStatus.OK);
    }

    @PostMapping("/consultant/verifyOtp")
    public ResponseEntity<UserJWTController.JWTToken> consultantVerifyOtp(@RequestBody VerifyOtpVM verifyOtpParam
     , HttpServletRequest request) {

        HttpSession session = request.getSession();
        Authentication authentication = (Authentication) session.getAttribute("authentication");
        String authAccount = authentication.getPrincipal().toString();

        if(!authAccount.equals(verifyOtpParam.getAccount())){
            return ResponseEntity.status(HttpStatus.UNAUTHORIZED).build();
        }

        otpUtilService.verifyOtp(verifyOtpParam);
        Consultant consultant = consultantService.findByAgentNo(verifyOtpParam.getAccount());

        if (consultant == null) {
            return ResponseEntity.status(HttpStatus.FORBIDDEN).build();
        }

        consultantService.updateLoginTime(verifyOtpParam.getAccount());
        SecurityContextHolder.getContext().setAuthentication(authentication);

        String jwt = tokenProvider.createToken(authentication, false);
        HttpHeaders httpHeaders = new HttpHeaders();
        httpHeaders.add(JWTFilter.AUTHORIZATION_HEADER, "Bearer" + jwt);
        session.setAttribute("authentication", null);
        return new ResponseEntity<>(new UserJWTController.JWTToken(jwt), httpHeaders, HttpStatus.OK);

    }

}