package eu.eudat.security.validators.google;

import eu.eudat.dao.entities.UserInfoDao;
import eu.eudat.dao.entities.security.CredentialDao;
import eu.eudat.dao.entities.security.UserTokenDao;
import eu.eudat.entities.Credential;
import eu.eudat.entities.UserInfo;
import eu.eudat.entities.UserToken;
import eu.eudat.exceptions.NonValidTokenException;
import eu.eudat.models.criteria.UserInfoCriteria;
import eu.eudat.models.security.Principal;
import eu.eudat.security.validators.TokenValidator;
import eu.eudat.security.validators.TokenValidatorFactoryImpl;
import eu.eudat.services.ApiContext;
import eu.eudat.services.AuthenticationService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.env.Environment;
import org.springframework.social.connect.Connection;
import org.springframework.social.connect.ConnectionKey;
import org.springframework.social.facebook.api.Facebook;
import org.springframework.social.facebook.api.User;
import org.springframework.social.facebook.connect.FacebookConnectionFactory;
import org.springframework.social.facebook.connect.FacebookServiceProvider;
import org.springframework.social.oauth2.AccessGrant;
import org.springframework.social.oauth2.OAuth2Operations;
import org.springframework.stereotype.Component;

import java.io.IOException;
import java.security.GeneralSecurityException;
import java.util.*;

/**
 * Created by ikalyvas on 1/9/2018.
 */
@Component("facebookTokenValidator")
public class FacebookTokenValidator implements TokenValidator {

    private Environment environment;
    private ApiContext apiContext;
    private FacebookServiceProvider facebookServiceProvider;

    @Autowired
    public FacebookTokenValidator(Environment environment,ApiContext apiContext) {
        this.environment = environment;
        this.apiContext= apiContext;
        this.facebookServiceProvider = new FacebookServiceProvider(this.environment.getProperty("facebook.login.clientId"), this.environment.getProperty("facebook.login.clientSecret"),this.environment.getProperty("facebook.login.namespace"));
    }

    @Override
    public Principal validateToken(String token) throws NonValidTokenException, IOException, GeneralSecurityException {
        User profile = getFacebookUserId(token);

        UserInfoCriteria criteria = new UserInfoCriteria();
        criteria.setEmail(profile.getEmail());
        List<UserInfo> users = apiContext.getDatabaseRepository().getUserInfoDao().getWithCriteria(criteria).toList();
        UserInfo userInfo = null;
        if(users.size()>0)userInfo = users.get(0);
        final Credential credential = new Credential();
        credential.setId(UUID.randomUUID());
        credential.setCreationTime(new Date());
        credential.setStatus(1);
        credential.setLastUpdateTime(new Date());
        credential.setProvider((int)TokenValidatorFactoryImpl.LoginProvider.FACEBOOK.getValue());
        credential.setSecret(token);
        if(userInfo == null) {
            userInfo = new UserInfo();
            userInfo.setName((String)profile.getName());
            userInfo.setVerified_email(profile.isVerified());
            userInfo.setEmail(profile.getEmail());
            userInfo.setCreated(new Date());
            userInfo.setLastloggedin(new Date());
            userInfo.setAuthorization_level(new Short("1"));
            userInfo.setUsertype(new Short("1"));
            userInfo = apiContext.getDatabaseRepository().getUserInfoDao().createOrUpdate(userInfo);

            credential.setPublicValue(userInfo.getName());

            credential.setUserInfo(userInfo);
            apiContext.getDatabaseRepository().getCredentialDao().createOrUpdate(credential);
        }
        else {
            userInfo.setLastloggedin(new Date());
            Set<Credential> credentials = userInfo.getCredentials();
            if(credentials.contains(credential)){
                Credential oldCredential = credentials.stream().filter(item->credential.getProvider().equals(item.getProvider())).findFirst().get();
                credential.setId(oldCredential.getId());
            }
            else{
                credential.setUserInfo(userInfo);
                credential.setId(UUID.randomUUID());
                credential.setPublicValue(userInfo.getName());

                apiContext.getDatabaseRepository().getCredentialDao().createOrUpdate(credential);
                userInfo.getCredentials().add(credential);
            }
            userInfo = apiContext.getDatabaseRepository().getUserInfoDao().createOrUpdate(userInfo);

        }

        UserToken userToken = new UserToken();
        userToken.setUser(userInfo);
        userToken.setIssuedAt(new Date());
        userToken.setToken(UUID.randomUUID());
        userToken.setExpiresAt(addADay(new Date()));
        apiContext.getDatabaseRepository().getUserTokenDao().create(userToken);
        return apiContext.getAuthenticationService().Touch(userToken.getToken());
    }


    private User getFacebookUserId(String accessToken) {
        String [] fields = { "id", "email",  "first_name", "last_name","name" };
        User profile = this.facebookServiceProvider.getApi(accessToken).fetchObject("me",User.class,fields);
        return profile;
    }

    private Date addADay(Date date){
        Date dt = new Date();
        Calendar c = Calendar.getInstance();
        c.setTime(dt);
        c.add(Calendar.DATE, 1);
        dt = c.getTime();
        return dt;
    }
}