SkycrateBackend/src/main/java/com/skycrate/backend/skycrateBackend/services/RefreshTokenService.java

package com.skycrate.backend.skycrateBackend.services;

import com.skycrate.backend.skycrateBackend.entity.RefreshToken;
import com.skycrate.backend.skycrateBackend.entity.User;
import com.skycrate.backend.skycrateBackend.repository.RefreshTokenRepository;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import java.time.Instant;
import java.util.Optional;
import java.util.UUID;

@Service
public class RefreshTokenService {

    private final RefreshTokenRepository refreshTokenRepo;

    @Value("${security.jwt.refresh-expiry-ms:604800000}") // 7 days default
    private Long refreshTokenDurationMs;

    public RefreshTokenService(RefreshTokenRepository refreshTokenRepo) {
        this.refreshTokenRepo = refreshTokenRepo;
    }

    public RefreshToken createRefreshToken(User user) {
        refreshTokenRepo.deleteByUser(user); // Allow only 1 active token per user

        RefreshToken token = new RefreshToken();
        token.setUser(user);
        token.setExpiryDate(Instant.now().plusMillis(refreshTokenDurationMs));
        token.setToken(UUID.randomUUID().toString());
        return refreshTokenRepo.save(token);
    }

    public Optional<RefreshToken> findByToken(String token) {
        return refreshTokenRepo.findByToken(token);
    }

    public boolean isExpired(RefreshToken token) {
        return token.getExpiryDate().isBefore(Instant.now());
    }
}