package com.example.cosmos_serversb.models;

import java.util.List;
import java.util.UUID;
import javax.inject.Singleton;

import com.example.cosmos_serversb.entities.*;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.boot.MetadataSources;
import org.hibernate.boot.registry.StandardServiceRegistry;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.criterion.Restrictions;

@Singleton
public class Users {
    private static Users theInstance = null;
    private static SessionFactory sessionFactory;

    public static void setUp() {
        // A SessionFactory is set up once for an application!
        final StandardServiceRegistry registry = new StandardServiceRegistryBuilder()
                .configure() // configures settings from hibernate.cfg.xml
                .build();
        try {
            sessionFactory = new MetadataSources( registry ).buildMetadata().buildSessionFactory();
        }
        catch (Exception e) {
            // The registry would be destroyed by the SessionFactory, but we had trouble building the SessionFactory
            // so destroy it manually.
            StandardServiceRegistryBuilder.destroy( registry );
        }
    }

    public static void tearDown() {
        try {
            if (sessionFactory != null) {
                sessionFactory.close();
            }
        } catch (Exception e) {
            System.out.println("Exception!");
        }
    }

    private Users() {
    }

    public static Users getInstance() {
        if (theInstance == null) {
            theInstance = new Users();
        }
        return theInstance;
    }

    public static String createToken(String uId) {
        //Tokenを作成しuIdと関連付けしDBに保存し作成したTokenを返す
        String token = UUID.randomUUID().toString();
        return token;
    }

    public static String createUId() {
        //uIdを作成し既存していないかチェック後DBに保存し作成したuIdを返す
        String uId = UUID.randomUUID().toString();
        return uId;
    }

    public static User createUser(String name, String pw, String iconImage) {

        Session session = sessionFactory.openSession();
        session.beginTransaction();
        //名前、uId、ユーザーuri、パスワード、アイコンイメージを保存
        User testUser = new User(name,getInstance().createUId(), "http://nitta-lab-8080/cosmos/users/{uId}.com",pw,iconImage);
        session.save(testUser);
        //出力
        List userResult = session.createQuery( "from User" ).list();
        for ( User user : (List<User>) userResult ) {
            System.out.println( "UserId (" + user.getuId() + ") : " + user.getUri() + ": " + user.getName());
        }
        session.getTransaction().commit();
        session.close();

//        testUser.token.add(getInstance().createToken(testUser.uId));
//        testUser.token.add(getInstance().createToken(testUser.uId));
        return testUser;
    }

    public static User setUser(String uId, String name, String pw, String iconImage) {

        Session session = sessionFactory.openSession();
        session.beginTransaction();
        List usertList = session.createQuery( "from User" ).list();
        for ( User user : (List<User>) usertList ) {
            if(user.getuId() == uId){
                user.setuId(uId);
                user.setName(name);
                user.setPw(pw);
                if(iconImage != null) {
                    user.setIconUri(iconImage);
                }
                session.update(user);
                break;
            }
        }
        session.getTransaction().commit();
        session.close();

//        testUser.token.add(getInstance().createToken(testUser.uId));
//        testUser.token.add(getInstance().createToken(testUser.uId));
        return null;
    }

    public static User getUserById(String uId) {
        //与えられたuIdのUser情報を返す

        Session session = sessionFactory.openSession();
        session.beginTransaction();
        List usertList = session.createQuery( "from User" ).list();
        for ( User user : (List<User>) usertList ) {
            if (user.getuId() == uId) {
                System.out.println( "name: " + user.getName() + "iconUri : " + user.getIconUri());
                break;
            }
        }
        session.getTransaction().commit();
        session.close();

//        testUser.token.add(getInstance().createToken(testUser.uId));
//        testUser.token.add(getInstance().createToken(testUser.uId));
        return null;
    }

    public static User getUserByToken(String token) {
        //与えられたTokenに紐づくUser情報を返す
        User testUser = new User("test",  getInstance().createUId(), "http://nitta-lab-8080/cosmos/users/{uId}.com", "testpw", "http://localhost:8080/iconImage/b4bb7db0-cc0c-4ee1-816f-8304add12da8.jpg");
//        testUser.token.add(getInstance().createToken(testUser.uId));
//        testUser.token.add(getInstance().createToken(testUser.uId));
        return testUser;
    }

    public static DeleteResult deleteUser(String uId) {

        Session session = sessionFactory.openSession();
        session = sessionFactory.openSession();
        session.beginTransaction();
        Request deleteRequest = (Request) session.load(Request.class, uId);
        if(deleteRequest != null){
            session.delete(deleteRequest);
            System.out.println("massage: Already Deleted");
        }
        session.getTransaction().commit();
        session.close();

        return DeleteResult.SUCCESS;
    }

    public static Token login(String uId) {
        Token testtoken = new Token(getInstance().createToken(uId));
        //tokenを作成後値を返す
        return testtoken;//testToken
    }

    public static DeleteResult logout(String token) {
        if(Users.getInstance().getUserByToken(token).uId == null) {
            return DeleteResult.FAILURE;
        }else{
//            Users.getInstance().getUserByToken(token).token.remove(Users.getInstance().getUserByToken(token).token.indexOf(token));
            return DeleteResult.SUCCESS;
        }
    }

    public static boolean checkToken(String uId, String token) {
        //与えられたtokenとUserのtokenを比較し結果を返す
        return true;
    }

    public static boolean checkPassword(String uId, String pw) {
        //与えられたパスワードとUserのパスワードを比較し結果を返す
        return true;
    }
}