/**
 * @author LIQIU
 * @date 2018-3-30
 **/
@Component
public class IntegrationAuthenticationFilter extends GenericFilterBean implements ApplicationContextAware {

  private static final String AUTH_TYPE_PARM_NAME = "auth_type";

  private static final String OAUTH_TOKEN_URL = "/oauth/token";

  private Collection<IntegrationAuthenticator> authenticators;

  private ApplicationContext applicationContext;

  private RequestMatcher requestMatcher;

  public IntegrationAuthenticationFilter(){
    this.requestMatcher = new OrRequestMatcher(
        new AntPathRequestMatcher(OAUTH_TOKEN_URL, "GET"),
        new AntPathRequestMatcher(OAUTH_TOKEN_URL, "POST")
    );
  }

  @Override
  public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {

    HttpServletRequest request = (HttpServletRequest) servletRequest;
    HttpServletResponse response = (HttpServletResponse) servletResponse;

    if(requestMatcher.matches(request)){
      //設(shè)置集成登錄信息
      IntegrationAuthentication integrationAuthentication = new IntegrationAuthentication();
      integrationAuthentication.setAuthType(request.getParameter(AUTH_TYPE_PARM_NAME));
      integrationAuthentication.setAuthParameters(request.getParameterMap());
      IntegrationAuthenticationContext.set(integrationAuthentication);
      try{
        //預(yù)處理
        this.prepare(integrationAuthentication);

        filterChain.doFilter(request,response);

        //后置處理
        this.complete(integrationAuthentication);
      }finally {
        IntegrationAuthenticationContext.clear();
      }
    }else{
      filterChain.doFilter(request,response);
    }
  }

  /**
   * 進(jìn)行預(yù)處理
   * @param integrationAuthentication
   */
  private void prepare(IntegrationAuthentication integrationAuthentication) {

    //延遲加載認(rèn)證器
    if(this.authenticators == null){
      synchronized (this){
        Map<String,IntegrationAuthenticator> integrationAuthenticatorMap = applicationContext.getBeansOfType(IntegrationAuthenticator.class);
        if(integrationAuthenticatorMap != null){
          this.authenticators = integrationAuthenticatorMap.values();
        }
      }
    }

    if(this.authenticators == null){
      this.authenticators = new ArrayList<>();
    }

    for (IntegrationAuthenticator authenticator: authenticators) {
      if(authenticator.support(integrationAuthentication)){
        authenticator.prepare(integrationAuthentication);
      }
    }
  }

  /**
   * 后置處理
   * @param integrationAuthentication
   */
  private void complete(IntegrationAuthentication integrationAuthentication){
    for (IntegrationAuthenticator authenticator: authenticators) {
      if(authenticator.support(integrationAuthentication)){
        authenticator.complete(integrationAuthentication);
      }
    }
  }

  @Override
  public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
    this.applicationContext = applicationContext;
  }
}

/**
 * @author LIQIU
 * @date 2018-3-7
 **/
@Configuration
@EnableAuthorizationServer
public class AuthorizationServerConfiguration extends AuthorizationServerConfigurerAdapter {

  @Autowired
  private RedisConnectionFactory redisConnectionFactory;

  @Autowired
  private AuthenticationManager authenticationManager;

  @Autowired
  private IntegrationUserDetailsService integrationUserDetailsService;

  @Autowired
  private WebResponseExceptionTranslator webResponseExceptionTranslator;

  @Autowired
  private IntegrationAuthenticationFilter integrationAuthenticationFilter;

  @Autowired
  private DatabaseCachableClientDetailsService redisClientDetailsService;

  @Override
  public void configure(ClientDetailsServiceConfigurer clients) throws Exception {
    // TODO persist clients details
    clients.withClientDetails(redisClientDetailsService);
  }

  @Override
  public void configure(AuthorizationServerEndpointsConfigurer endpoints) {
    endpoints
        .tokenStore(new RedisTokenStore(redisConnectionFactory))
//        .accessTokenConverter(jwtAccessTokenConverter())
        .authenticationManager(authenticationManager)
        .exceptionTranslator(webResponseExceptionTranslator)
        .reuseRefreshTokens(false)
        .userDetailsService(integrationUserDetailsService);
  }

  @Override
  public void configure(AuthorizationServerSecurityConfigurer security) throws Exception {
    security.allowFormAuthenticationForClients()
        .tokenKeyAccess("isAuthenticated()")
        .checkTokenAccess("permitAll()")
        .addTokenEndpointAuthenticationFilter(integrationAuthenticationFilter);
  }

  @Bean
  public PasswordEncoder passwordEncoder() {
    return new BCryptPasswordEncoder();
  }

  @Bean
  public JwtAccessTokenConverter jwtAccessTokenConverter() {
    JwtAccessTokenConverter jwtAccessTokenConverter = new JwtAccessTokenConverter();
    jwtAccessTokenConverter.setSigningKey("cola-cloud");
    return jwtAccessTokenConverter;
  }
}

@Service
public class IntegrationUserDetailsService implements UserDetailsService {

  @Autowired
  private UpmClient upmClient;

  private List<IntegrationAuthenticator> authenticators;

  @Autowired(required = false)
  public void setIntegrationAuthenticators(List<IntegrationAuthenticator> authenticators) {
    this.authenticators = authenticators;
  }

  @Override
  public User loadUserByUsername(String username) throws UsernameNotFoundException {
    IntegrationAuthentication integrationAuthentication = IntegrationAuthenticationContext.get();
    //判斷是否是集成登錄
    if (integrationAuthentication == null) {
      integrationAuthentication = new IntegrationAuthentication();
    }
    integrationAuthentication.setUsername(username);
    UserVO userVO = this.authenticate(integrationAuthentication);

    if(userVO == null){
      throw new UsernameNotFoundException("用戶(hù)名或密碼錯(cuò)誤");
    }

    User user = new User();
    BeanUtils.copyProperties(userVO, user);
    this.setAuthorize(user);
    return user;

  }

  /**
   * 設(shè)置授權(quán)信息
   *
   * @param user
   */
  public void setAuthorize(User user) {
    Authorize authorize = this.upmClient.getAuthorize(user.getId());
    user.setRoles(authorize.getRoles());
    user.setResources(authorize.getResources());
  }

  private UserVO authenticate(IntegrationAuthentication integrationAuthentication) {
    if (this.authenticators != null) {
      for (IntegrationAuthenticator authenticator : authenticators) {
        if (authenticator.support(integrationAuthentication)) {
          return authenticator.authenticate(integrationAuthentication);
        }
      }
    }
    return null;
  }
}

@Component
@Primary
public class UsernamePasswordAuthenticator extends AbstractPreparableIntegrationAuthenticator {

  @Autowired
  private UcClient ucClient;

  @Override
  public UserVO authenticate(IntegrationAuthentication integrationAuthentication) {
    return ucClient.findUserByUsername(integrationAuthentication.getUsername());
  }

  @Override
  public void prepare(IntegrationAuthentication integrationAuthentication) {

  }

  @Override
  public boolean support(IntegrationAuthentication integrationAuthentication) {
    return StringUtils.isEmpty(integrationAuthentication.getAuthType());
  }
}

/**
 * 集成驗(yàn)證碼認(rèn)證
 * @author LIQIU
 * @date 2018-3-31
 **/
@Component
public class VerificationCodeIntegrationAuthenticator extends UsernamePasswordAuthenticator {

  private final static String VERIFICATION_CODE_AUTH_TYPE = "vc";

  @Autowired
  private VccClient vccClient;

  @Override
  public void prepare(IntegrationAuthentication integrationAuthentication) {
    String vcToken = integrationAuthentication.getAuthParameter("vc_token");
    String vcCode = integrationAuthentication.getAuthParameter("vc_code");
    //驗(yàn)證驗(yàn)證碼
    Result<Boolean> result = vccClient.validate(vcToken, vcCode, null);
    if (!result.getData()) {
      throw new OAuth2Exception("驗(yàn)證碼錯(cuò)誤");
    }
  }

  @Override
  public boolean support(IntegrationAuthentication integrationAuthentication) {
    return VERIFICATION_CODE_AUTH_TYPE.equals(integrationAuthentication.getAuthType());
  }
}

@Component
public class SmsIntegrationAuthenticator extends AbstractPreparableIntegrationAuthenticator implements ApplicationEventPublisherAware {

  @Autowired
  private UcClient ucClient;

  @Autowired
  private VccClient vccClient;

  @Autowired
  private PasswordEncoder passwordEncoder;

  private ApplicationEventPublisher applicationEventPublisher;

  private final static String SMS_AUTH_TYPE = "sms";

  @Override
  public UserVO authenticate(IntegrationAuthentication integrationAuthentication) {

    //獲取密碼，實(shí)際值是驗(yàn)證碼
    String password = integrationAuthentication.getAuthParameter("password");
    //獲取用戶(hù)名，實(shí)際值是手機(jī)號(hào)
    String username = integrationAuthentication.getUsername();
    //發(fā)布事件，可以監(jiān)聽(tīng)事件進(jìn)行自動(dòng)注冊(cè)用戶(hù)
    this.applicationEventPublisher.publishEvent(new SmsAuthenticateBeforeEvent(integrationAuthentication));
    //通過(guò)手機(jī)號(hào)碼查詢(xún)用戶(hù)
    UserVO userVo = this.ucClient.findUserByPhoneNumber(username);
    if (userVo != null) {
      //將密碼設(shè)置為驗(yàn)證碼
      userVo.setPassword(passwordEncoder.encode(password));
      //發(fā)布事件，可以監(jiān)聽(tīng)事件進(jìn)行消息通知
      this.applicationEventPublisher.publishEvent(new SmsAuthenticateSuccessEvent(integrationAuthentication));
    }
    return userVo;
  }

  @Override
  public void prepare(IntegrationAuthentication integrationAuthentication) {
    String smsToken = integrationAuthentication.getAuthParameter("sms_token");
    String smsCode = integrationAuthentication.getAuthParameter("password");
    String username = integrationAuthentication.getAuthParameter("username");
    Result<Boolean> result = vccClient.validate(smsToken, smsCode, username);
    if (!result.getData()) {
      throw new OAuth2Exception("驗(yàn)證碼錯(cuò)誤或已過(guò)期");
    }
  }

  @Override
  public boolean support(IntegrationAuthentication integrationAuthentication) {
    return SMS_AUTH_TYPE.equals(integrationAuthentication.getAuthType());
  }

  @Override
  public void setApplicationEventPublisher(ApplicationEventPublisher applicationEventPublisher) {
    this.applicationEventPublisher = applicationEventPublisher;
  }
}