package com.allfree.allfreespringbackend.auth.security;

import com.allfree.allfreespringbackend.common.Properties;
import io.jsonwebtoken.*;
import org.springframework.security.core.Authentication;
import org.springframework.stereotype.Component;

import java.util.Date;

@Component
public class JwtUtil {

    private final String jwtSecret = Properties.jwtSecretKey;

    public String generateJwtToken(Authentication authentication) {

        UserDetailsImpl userPrincipal = (UserDetailsImpl) authentication.getPrincipal();
        return Jwts.builder()
                .setSubject(userPrincipal.getUsername())
                .setIssuedAt(new Date())
                .signWith(SignatureAlgorithm.HS512, jwtSecret)
                .compact();
    }

    public String getUserNameFromJwtToken(String token) {
        return Jwts.parser().setSigningKey(jwtSecret).parseClaimsJws(token).getBody().getSubject();
    }

    public boolean validateJwtToken(String authToken) {
        try {
            Jwts.parser().setSigningKey(jwtSecret).parseClaimsJws(authToken);
            return true;
        } catch (SignatureException e) {
            System.out.println("Invalid JWT signature: {} " + e.getMessage());
        } catch (MalformedJwtException e) {
            System.out.println("Invalid JWT token: {}" + e.getMessage());
        } catch (ExpiredJwtException e) {
            System.out.println("JWT token is expired: {}" + e.getMessage());
        } catch (UnsupportedJwtException e) {
            System.out.println("JWT token is unsupported: {}" + e.getMessage());
        } catch (IllegalArgumentException e) {
            System.out.println("JWT claims string is empty: {}" + e.getMessage());
        }

        return false;
    }

}