package eu.eudat.security.validators.facebook;

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.exceptions.UnauthorisedException;
import eu.eudat.models.criteria.UserInfoCriteria;
import eu.eudat.models.login.LoginInfo;
import eu.eudat.models.loginprovider.LoginProviderUser;
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 AuthenticationService authenticationService;
    private FacebookServiceProvider facebookServiceProvider;

    @Autowired
    public FacebookTokenValidator(Environment environment,ApiContext apiContext,AuthenticationService authenticationService) {
        this.environment = environment;
        this.apiContext= apiContext;
        this.authenticationService = authenticationService;
        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(LoginInfo credentials) throws NonValidTokenException, IOException, GeneralSecurityException {
        User profile = getFacebookUser(credentials.getTicket());
        LoginProviderUser user = new LoginProviderUser();
        if(profile.getEmail() == null ) throw new UnauthorisedException("Cannot login user.Facebook account did not provide email");
        user.setEmail(profile.getEmail());
        user.setIsVerified(profile.isVerified());
        user.setName(profile.getName());
        user.setProvider(TokenValidatorFactoryImpl.LoginProvider.FACEBOOK);
        user.setSecret(credentials.getTicket());
        return this.authenticationService.Touch(user);
    }


    private User getFacebookUser(String accessToken) {
        String [] fields = { "id", "email",  "first_name", "last_name","name","verified" };
        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;
    }
}